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Cheap flights from St. Louis to Seattle (STL - SEA) from $50

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — SEA
Jun 4 — Jun 111
From?
To?
Tue 6/4
Tue 6/11
1 adult, Economy
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The best prices from Lambert-St Louis to Seattle/Tacoma Intl are usually found in February or January, booked 81 days in advance, depart on a Thursday or Monday and return on a Tuesday

Cheap flight deals from St. Louis to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 30, 2024.

Popular in

July

Cheapest in

February

Round-trip from

$247

One-way from

$112
High demand for flights, 32% potential price rise
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Best time to find cheap flights, 29% potential price drop
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From Lambert-St Louis to Seattle/Tacoma Intl
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One-way flight from Lambert-St Louis to Seattle/Tacoma Intl
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What is the cheapest day to fly round-trip from St. Louis to Seattle?

Leaving on a Wednesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 17% on the overall cost on flights from St. Louis to Seattle.

How far in advance should I book a flight from St. Louis to Seattle?

Find a great deal and save up to 14% by booking at least 56 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Seattle within the next two weeks, with the cheapest ticket starting at $278.

What is the cheapest month to fly from St. Louis to Seattle?

Flights from St. Louis to Seattle lean towards being more expensive in July. Prices are generally better when you fly from St. Louis to Seattle in February, with the cheapest ticket starting at $133.

What is the cheapest time of day to fly from STL to SEA?

Unlike in the evening, when flights are generally more expensive, you can save up to 29% on flights from St. Louis to Seattle by exploring options for tickets in the afternoon.

Cheap Spirit Airlines flights from St. Louis to Seattle

Explore cheap flight options specifically provided by Spirit Airlines for the route between St. Louis and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Peruse some of the lowest-priced Spirit Airlines flights we've found from St. Louis to Seattle. Deals update often to give you more flight options matching your criteria
Tue 8/208:00 amSTL - SEA
1 stop26h 45mSpirit Airlines
Tue 8/279:12 pmSEA - STL
1 stop11h 34mSpirit Airlines
Deal found 5/29$127
Wed 8/2111:36 amSTL - SEA
1 stop10h 45mSpirit Airlines
Tue 8/279:12 pmSEA - STL
1 stop11h 34mSpirit Airlines
Deal found 5/29$132
Tue 9/108:00 amSTL - SEA
1 stop26h 45mSpirit Airlines
Mon 9/161:35 pmSEA - STL
1 stop24h 06mSpirit Airlines
Deal found 5/30$143
Tue 9/108:00 amSTL - SEA
1 stop26h 45mSpirit Airlines
Mon 9/165:00 pmSEA - STL
2 stops20h 41mSpirit Airlines
Deal found 5/30$145
Wed 8/2111:36 amSTL - SEA
1 stop10h 45mSpirit Airlines
Tue 8/275:00 pmSEA - STL
2 stops15h 46mSpirit Airlines
Deal found 5/29$151
Tue 9/108:00 amSTL - SEA
1 stop14h 21mSpirit Airlines
Mon 9/169:12 pmSEA - STL
1 stop16h 29mSpirit Airlines
Deal found 5/29$153
Tue 9/1010:34 amSTL - SEA
2 stops28h 11mSpirit Airlines
Mon 9/165:00 pmSEA - STL
2 stops20h 41mSpirit Airlines
Deal found 5/30$159
Mon 9/163:02 pmSTL - SEA
1 stop19h 43mSpirit Airlines
Mon 9/231:35 pmSEA - STL
1 stop24h 06mSpirit Airlines
Deal found 5/29$174
Mon 9/163:02 pmSTL - SEA
1 stop19h 43mSpirit Airlines
Mon 9/239:12 pmSEA - STL
1 stop16h 29mSpirit Airlines
Deal found 5/30$184

  • If you’re traveling from St. Louis to Seattle, one of the more common airlines traveling that route is Spirit Airlines. St. Louis to Seattle flights are typically 32% cheaper than other airlines traveling the same route. Flights from Spirit Airlines typically cost $397.74 RT. The cheapest Spirit Airlines flight found for this route was $170. When traveling from St. Louis to Seattle on Spirit Airlines, the most popular airport to depart from is Lambert-St Louis Airport and the most popular airport to arrive at is Seattle/Tacoma Intl Airport. When flying from St. Louis to Seattle, Spirit Airlines flights are 11% more popular than any other airline flying that same route.

Cheap Frontier flights from St. Louis to Seattle

Explore cheap flight options specifically provided by Frontier for the route between St. Louis and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Take a gander at the lowest prices we've found on Frontier flights from St. Louis to Seattle. Make sure to examine the flight information before completing your reservation.
Thu 8/297:29 pmSTL - SEA
1 stop17h 19mFrontier
Thu 9/57:51 pmSEA - STL
1 stop12h 27mFrontier
Deal found 5/29$179
Fri 9/138:00 pmSTL - SEA
1 stop27h 11mFrontier
Sun 9/157:51 pmSEA - STL
1 stop12h 27mFrontier
Deal found 5/29$181
Thu 8/297:29 pmSTL - SEA
1 stop17h 19mFrontier
Mon 9/27:51 pmSEA - STL
1 stop12h 27mFrontier
Deal found 5/29$182
Wed 6/127:29 pmSTL - SEA
1 stop28h 36mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/29$185
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/29$186
Sat 8/248:00 pmSTL - SEA
1 stop14h 37mFrontier
Mon 9/27:51 pmSEA - STL
1 stop12h 27mFrontier
Deal found 5/29$190
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Tue 6/111:47 pmSEA - STL
2 stops18h 55mFrontier
Deal found 5/29$195
Fri 8/307:29 pmSTL - SEA
1 stop25h 32mFrontier
Tue 9/37:51 pmSEA - STL
1 stop12h 27mFrontier
Deal found 5/29$200
Thu 6/137:29 pmSTL - SEA
1 stop15h 08mFrontier
Sun 6/1610:58 pmSEA - STL
1 stop9h 44mFrontier
Deal found 5/29$205

  • One of the most popular airlines traveling from St. Louis to Seattle is Frontier. Flights from Frontier traveling this route typically cost $453.15 RT. This price is typically 40% cheaper than other airlines that offer St. Louis to Seattle flights. When booking this route, the cheapest RT price found was $176. Lambert-St Louis Airport is the most common St. Louis airport to take off from when flying to Seattle. Seattle/Tacoma Intl Airport is the most popular arrival airport in Seattle. When flying from St. Louis to Seattle, Frontier flights are 1% more popular than any other airline flying that same route.

Cheap St. Louis to Seattle flights in May & June 2024

Find cheap flight options from St. Louis to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Prices were last updated on May 30, 2024.
These are some of the most attractive deals on flights from St. Louis to Seattle in 2024. More deals are always being added, so be sure to check back regularly.
Thu 6/137:29 pmSTL - SEA
1 stop15h 08mMultiple Airlines
Tue 6/189:41 pmSEA - STL
1 stop13h 24mMultiple Airlines
Deal found 5/29$183
Wed 6/127:29 pmSTL - SEA
1 stop28h 36mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/29$185
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/29$186
Tue 6/1811:57 amSTL - SEA
2 stops22h 35mSpirit Airlines
Tue 6/259:41 pmSEA - STL
1 stop13h 24mSpirit Airlines
Deal found 5/29$191
Wed 6/121:55 pmSTL - SEA
1 stop20h 37mMultiple Airlines
Sun 6/1610:58 pmSEA - STL
1 stop9h 44mMultiple Airlines
Deal found 5/28$192
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Tue 6/111:47 pmSEA - STL
2 stops18h 55mFrontier
Deal found 5/29$195
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Sun 6/1610:58 pmSEA - STL
1 stop9h 44mFrontier
Deal found 5/29$200
Tue 6/183:47 pmSTL - SEA
1 stop17h 19mMultiple Airlines
Tue 6/259:41 pmSEA - STL
1 stop13h 24mMultiple Airlines
Deal found 5/29$203
Thu 6/137:29 pmSTL - SEA
1 stop15h 08mFrontier
Sun 6/1610:58 pmSEA - STL
1 stop9h 44mFrontier
Deal found 5/29$205

St. Louis to Seattle 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
These are some of the most attractive deals on flights from St. Louis to Seattle in 2024. More deals are always being added, so be sure to check back regularly.
Tue 8/208:00 amSTL - SEA
1 stop26h 45mSpirit Airlines
Tue 8/279:12 pmSEA - STL
1 stop11h 34mSpirit Airlines
Deal found 5/29$127
Wed 8/2111:36 amSTL - SEA
1 stop10h 45mSpirit Airlines
Tue 8/279:12 pmSEA - STL
1 stop11h 34mSpirit Airlines
Deal found 5/29$132
Tue 8/207:29 pmSTL - SEA
1 stop17h 19mMultiple Airlines
Tue 8/279:12 pmSEA - STL
1 stop11h 34mMultiple Airlines
Deal found 5/29$142
Tue 9/108:00 amSTL - SEA
1 stop26h 45mSpirit Airlines
Mon 9/161:35 pmSEA - STL
1 stop24h 06mSpirit Airlines
Deal found 5/30$143
Tue 9/108:00 amSTL - SEA
1 stop26h 45mSpirit Airlines
Mon 9/165:00 pmSEA - STL
2 stops20h 41mSpirit Airlines
Deal found 5/30$145
Wed 8/2111:36 amSTL - SEA
1 stop10h 45mSpirit Airlines
Tue 8/275:00 pmSEA - STL
2 stops15h 46mSpirit Airlines
Deal found 5/29$151
Tue 9/108:00 amSTL - SEA
1 stop14h 21mSpirit Airlines
Mon 9/169:12 pmSEA - STL
1 stop16h 29mSpirit Airlines
Deal found 5/29$153
Tue 9/1010:34 amSTL - SEA
2 stops28h 11mSpirit Airlines
Mon 9/165:00 pmSEA - STL
2 stops20h 41mSpirit Airlines
Deal found 5/30$159
Mon 9/163:02 pmSTL - SEA
1 stop19h 43mSpirit Airlines
Mon 9/231:35 pmSEA - STL
1 stop24h 06mSpirit Airlines
Deal found 5/29$174

Non-stop flights to Seattle from St. Louis

Discover non-stop flight options from St. Louis to Seattle. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
To help reduce your travel time, choose from one of these non-stop flights from St. Louis to Seattle. If you're looking for other options for flights from St. Louis to Seattle, make sure to update the search form at the top of page.
Tue 8/207:00 amSTL - SEA
Nonstop4h 26mAlaska Airlines
Tue 8/277:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 5/29$277
Fri 8/237:31 pmSTL - SEA
Nonstop4h 24mAlaska Airlines
Mon 8/266:08 pmSEA - STL
Nonstop3h 51mAlaska Airlines
Deal found 5/29$297
Tue 8/202:34 pmSTL - SEA
Nonstop4h 25mAlaska Airlines
Tue 8/277:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 5/30$307
Thu 8/227:31 pmSTL - SEA
Nonstop4h 24mAlaska Airlines
Mon 9/27:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 5/29$327
Thu 6/207:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Wed 6/267:30 amSEA - STL
Nonstop3h 50mAlaska Airlines
Deal found 5/30$347
Thu 8/157:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Fri 8/237:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 5/30$362
Fri 6/217:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Tue 6/256:10 pmSEA - STL
Nonstop3h 49mAlaska Airlines
Deal found 5/29$367
Thu 6/207:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Sat 6/227:30 amSEA - STL
Nonstop3h 50mAlaska Airlines
Deal found 5/29$387
Thu 6/137:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Thu 6/206:10 pmSEA - STL
Nonstop3h 49mAlaska Airlines
Deal found 5/30$392

St. Louis to Seattle flights leaving soon

Find last-minute flight options from St. Louis to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Have a look at some of the flights available from St. Louis to Seattle departing last-minute. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/29$186
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Tue 6/119:41 amSEA - STL
1 stop21h 48mFrontier
Deal found 5/30$190
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Tue 6/111:47 pmSEA - STL
2 stops18h 55mFrontier
Deal found 5/29$195
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Sun 6/1610:58 pmSEA - STL
1 stop9h 44mFrontier
Deal found 5/29$200
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Mon 6/1710:03 pmSEA - STL
1 stop10h 39mFrontier
Deal found 5/29$209
Fri 6/710:59 pmSTL - SEA
1 stop11h 10mFrontier
Mon 6/1710:03 pmSEA - STL
1 stop10h 39mFrontier
Deal found 5/29$222
Fri 6/710:59 pmSTL - SEA
1 stop11h 10mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/29$229
Tue 6/410:44 pmSTL - SEA
1 stop10h 17mFrontier
Sun 6/910:58 pmSEA - STL
1 stop9h 44mFrontier
Deal found 5/29$261
Sun 6/97:29 pmSTL - SEA
1 stop27h 27mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/29$262

One-way flights to Seattle from St. Louis

Search for one-way flight options from St. Louis to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
If you're seeking multiple options on one-way flights from St. Louis to Seattle, be sure to check out these deals, which are updated often. Those seeking round-trip flights from St. Louis to Seattle should utilize the search form at the the top of the page.
Tue 9/108:00 amSTL - SEA
1 stop14h 21mSpirit Airlines
Deal found 5/29$50
Tue 9/1010:34 amSTL - SEA
2 stops28h 11mSpirit Airlines
Deal found 5/29$64
Mon 6/172:41 pmSTL - SEA
1 stop20h 18mSpirit Airlines
Deal found 5/29$87
Tue 9/108:00 amSTL - SEA
3 stops34h 08mSpirit Airlines
Deal found 5/29$94
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Deal found 5/29$96
Thu 6/67:29 pmSTL - SEA
1 stop27h 27mFrontier
Deal found 5/29$100
Tue 8/137:29 pmSTL - SEA
1 stop25h 32mFrontier
Deal found 5/29$102
Wed 8/1411:36 amSTL - SEA
1 stop10h 45mSpirit Airlines
Deal found 5/29$103
Mon 9/303:07 pmSTL - SEA
1 stop9h 49mAmerican Airlines
Deal found 5/29$112

Find flights from St. Louis to Seattle within your budget

Customize your flight search to find flights from St. Louis to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$127 - $317

Route

Depart

Return

Price

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 8/20

1 stop26h 45m

Seattle/Tacoma Intl

Tue 8/27

1 stop11h 34m

$127

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Wed 8/21

1 stop10h 45m

Seattle/Tacoma Intl

Tue 8/27

1 stop11h 34m

$132

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 8/20

1 stop17h 19m

Seattle/Tacoma Intl

Tue 8/27

1 stop11h 34m

$142

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 9/10

1 stop26h 45m

Seattle/Tacoma Intl

Mon 9/16

1 stop24h 06m

$143

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 9/10

1 stop26h 45m

Seattle/Tacoma Intl

Mon 9/16

2 stops20h 41m

$145

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Wed 8/28

1 stop10h 45m

Seattle/Tacoma Intl

Sat 8/31

1 stop12h 27m

$176

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Thu 8/29

1 stop17h 19m

Seattle/Tacoma Intl

Thu 9/5

1 stop12h 27m

$179

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 8/20

Nonstop4h 26m

Seattle/Tacoma Intl

Tue 8/27

Nonstop3h 56m

$277

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 8/20

1 stop7h 29m

Seattle/Tacoma Intl

Mon 8/26

1 stop7h 58m

$317

Flights are sorted by cheapest first

Deals found on 5/29

How far ahead should I book a flight from St. Louis to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Seattle. Price data was last updated on May 24, 2024.
The best time to book flights from St. Louis to Seattle is 81 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

What is the cheapest day to fly from St. Louis to Seattle?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Seattle. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Seattle flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from St. Louis to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

41 - 66.2 °F

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated May 30, 2024.
See what other customers who have flown with Spirit Airlines, Frontier and American Airlines from St. Louis to Seattle have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Alaska Airlines
8.1
Very good
9,192 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Delta
8.0
Very good
10,457 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

United Airlines
7.4
Good
10,777 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

American Airlines
7.3
Good
14,284 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Sun Country Air
7.2
Good
596 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.3

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from St. Louis to Seattle?

    Booking a flight from Lambert-St Louis (STL) to Seattle/Tacoma Intl (SEA) is your only option if you wish to fly from St. Louis to Seattle. On a typical day, there are 6 flights from Lambert-St Louis to Seattle/Tacoma Intl, all of which are around 4h 14m for a nonstop flight. You can also purchase a plane ticket from 8 airlines when you book a flight from Lambert-St Louis to Seattle.

  • Can I find flights from St. Louis to Seattle for under $200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Seattle for under $200. The cheapest flight booked recently is on Spirit Airlines for just $127, but on average you can expect to pay $167.

  • Are there nonstop flights from St. Louis to Seattle for under $300 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Seattle under $300. A good price for a nonstop flight from St. Louis to Seattle is less than $418.

  • Are there last-minute flights available from St. Louis to Seattle for under $200?

    There are currently 20+ open flights from St. Louis to Seattle within the next 7 days for less than $200.

  • What days are nonstop flights available from St. Louis to Seattle?

    Nonstop flights can be found on the following days: Monday, Thursday, Friday, Saturday.

  • How popular is this St. Louis to Seattle flight route?

    Within the past month, 59 users have taken a look at flights from Lambert-St Louis to Seattle/Tacoma Intl.

  • How many flights depart from St. Louis to Seattle on average per day?

    Per day, 11 flights depart from St. Louis to Seattle on average.
    Morning (6am - Noon) - 73% of flight departures
    Evening (6pm - Midnight) - 27% of flight departures

  • How long is the flight from St. Louis to Seattle?

    Airlines like Spirit Airlines and Frontier fly from St. Louis to Seattle in about 17h 19m. The time it takes to get you to your destination can typically vary by up to 9h 26m. There are 1714 mi between St. Louis and Seattle. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from St. Louis to Seattle round-trip?

    Currently priced at $127, Spirit Airlines will fly you from St. Louis to Seattle and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Frontier for as low as $179. You may be able to fly from St. Louis to Seattle for 63% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from St. Louis to Seattle one-way?

    The cheapest airlines for a one-way flight from St. Louis to Seattle are Spirit Airlines ($50), Frontier ($96), and American Airlines ($112).

  • What are the most reliable airlines from St. Louis to Seattle?

    The top 3 most reliable airlines when flying from St. Louis to Seattle are Qatar Airways (93%), Japan Airlines (93%) and American Airlines (89%).

  • What are the cheapest flights from St. Louis to Seattle?

    Looking for the cheapest flight from St. Louis to Seattle? While on average our users pay $961, our data indicates the cheapest price to be $141. The most popular route (Lambert-St Louis - Seattle/Tacoma Intl), is priced around $127.

  • What does STL to SEA mean?

    STL stands for Lambert-St Louis Airport, while SEA stands for Seattle/Tacoma Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Where are the most common layover locations when flying from St. Louis to Seattle?

    St. Louis to Seattle flights have a layover in Salt Lake City most of the time.

  • What are some popular things to do or see while on a layover in Salt Lake City?

    Most Salt Lake City visitors opt to spend their time experiencing Temple Square, Family History Library, and Abravanel Hall. Temple Square, Family History Library, and Abravanel Hall can be accessed by traveling approximately 4.7 mi, 4.7 mi, and 4.7 mi, respectively from Salt Lake City. Travelers in need of a car in Salt Lake City can rent one for about $55 per day.

  • Where are the least popular layover locations for St. Louis to Seattle flights?

    The least popular layover on flights from St. Louis to Seattle is Denver.

  • Can I find deals for flights from St. Louis to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Seattle that include hotel bookings?

    Yes. In addition to deals on St. Louis to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Seattle.

  • Can I find deals for business class flights from St. Louis to Seattle?

    Yes. Cheapflights offers flight deals from St. Louis to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Seattle that allow pets onboard?

    Many airlines flying from St. Louis to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Seattle?

    Yes, you can often find last-minute deals on St. Louis to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Seattle flight deals updated?

    The St. Louis to Seattle flight deals you see on this page were last updated on 5/30.

  • What are the most popular airlines that fly from St. Louis to Seattle?

    Consider Undisclosed Carrier, American Airlines or Alaska Airlines when booking your flight. These represent the most popular airlines when flying from St. Louis to Seattle.

  • What is the cheapest month to book a flight from St. Louis to Seattle?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Seattle (average of $247). Flying from St. Louis to Seattle in July is currently the most expensive (average of $406). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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See prices for flight routes from nearby airports that may be better suited for you.

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Top 7 airlines flying from St. Louis to Seattle

Discover the top 7 airlines that operate flights from St. Louis to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$132Average$279FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$152Average$225FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapest$157Average$286FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Sun Country AirCheapest$169Average$384FlexibilityNo cancel feeOn-time83%
Search Sun Country Air flights
Alaska AirlinesCheapest$170Average$398FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapest$174Average$329FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$176Average$453FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
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Search flights from St. Louis to Seattle by cabin class

Find flights from St. Louis to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from St. Louis to Seattle

Find hourly flight availability from St. Louis to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 30, 2024.
1%of flight departuresEarly morningMidnight to 6 am
41%of flight departuresMorning6 am to noon
33%of flight departuresAfternoonNoon to 6 pm
25%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from St. Louis to Seattle

Explore weekly flight availability from St. Louis to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 30, 2024.
Sunday4daily flights
Monday8daily flights
Tuesday6daily flights
Wednesday4daily flights
Thursday6daily flights
Friday8daily flights
Saturday6daily flights

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Deals for St. Louis to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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Cheapflights helps you find that perfect flight to Seattle from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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Certainly. Search results for flights to Seattle from St. Louis shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Of course! You can now track prices for flights from St. Louis to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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