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Cheap flights from Seattle to St. Louis (SEA - STL) from $79

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 6/4. 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.
SEA — STL
May 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Lambert-St Louis are usually found in January or February, booked 71 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Seattle to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to St. Louis (STL). 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 16, 2024.

Popular in

July

Cheapest in

January

Round-trip from

$320

One-way from

$113
High demand for flights, 22% potential price rise
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Best time to find cheap flights, 31% potential price drop
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From Seattle/Tacoma Intl to Lambert-St Louis
Search Deals
One-way flight from Seattle/Tacoma Intl to Lambert-St Louis
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What is the cheapest day to fly round-trip from Seattle to St. Louis?

Flying to your destination on a Thursday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to St. Louis. Check prices with Cheapflights to find a great deal for your trip.

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

To save on the cost of your flight from Seattle to St. Louis, book at least 49 days before your planned departure. Booking around this time can save you about 49% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $296 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $319.

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

January can be a great time to fly to St. Louis from Seattle with a flight ticket averaging about $343. Cheapflights users have found deals in the month of January for as cheap as $155. The most expensive prices can be found in the month of July.

When is the cheapest time to fly from Seattle to St. Louis (SEA - STL)?

When flying from Seattle to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 26% versus a flight at noon.

Cheap Frontier flights from Seattle to St. Louis

Explore cheap flight options specifically provided by Frontier for the route between Seattle and St. Louis. 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 2,637,452 searches. Data last updated May 16, 2024.
Take a peek at the cheapest Frontier flights we've detected traveling from Seattle to St. Louis. Make sure to check back often as deals are often changing.
Fri 7/129:46 pmSEA - STL
1 stop16h 52mFrontier
Mon 7/1512:41 pmSTL - SEA
1 stop8h 52mFrontier
Deal found 5/16$230
Wed 7/101:34 pmSEA - STL
2 stops29h 20mFrontier
Tue 7/303:47 pmSTL - SEA
1 stop17h 13mFrontier
Deal found 5/16$235
Tue 6/181:47 pmSEA - STL
2 stops18h 55mFrontier
Fri 6/215:36 pmSTL - SEA
2 stops23h 00mFrontier
Deal found 5/15$237
Sat 6/1510:26 pmSEA - STL
1 stop14h 11mFrontier
Mon 6/178:22 pmSTL - SEA
1 stop24h 48mFrontier
Deal found 5/15$238
Fri 7/129:29 amSEA - STL
2 stops10h 02mFrontier
Mon 7/1512:12 pmSTL - SEA
2 stops26h 22mFrontier
Deal found 5/16$240
Thu 7/119:45 pmSEA - STL
1 stop12h 01mFrontier
Sun 7/1410:32 pmSTL - SEA
1 stop12h 08mFrontier
Deal found 5/15$245
Thu 6/279:42 pmSEA - STL
1 stop12h 12mFrontier
Sun 7/73:37 pmSTL - SEA
1 stop6h 07mFrontier
Deal found 5/15$258
Fri 5/249:04 pmSEA - STL
1 stop11h 09mFrontier
Sun 5/2611:22 pmSTL - SEA
1 stop11h 18mFrontier
Deal found 5/15$259
Thu 7/119:45 pmSEA - STL
1 stop12h 01mFrontier
Sat 7/135:38 pmSTL - SEA
2 stops22h 50mFrontier
Deal found 5/16$260

Cheap Delta flights from Seattle to St. Louis

Explore cheap flight options specifically provided by Delta for the route between Seattle and St. Louis. 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 2,637,452 searches. Data last updated May 16, 2024.
Some of the lowest-priced Delta flights we've found at this time heading from Seattle to St. Louis. Deals are refreshing constantly so come back soon for more options.
Wed 5/2912:40 amSEA - STL
1 stop8h 30mDelta
Mon 6/36:50 pmSTL - SEA
1 stop7h 09mDelta
Deal found 5/16$248
Wed 5/2212:40 amSEA - STL
1 stop8h 30mDelta
Sat 6/15:30 pmSTL - SEA
1 stop6h 33mDelta
Deal found 5/15$327

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

Find cheap flight options from Seattle to St. Louis specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Prices were last updated on May 16, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to St. Louis in 2024. Check back regularly for other flight deals.
Tue 6/111:47 pmSEA - STL
2 stops18h 55mFrontier
Sat 6/158:02 pmSTL - SEA
1 stop15h 08mFrontier
Deal found 5/16$229
Tue 6/115:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Sat 6/157:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Deal found 5/16$237
Sat 6/1510:26 pmSEA - STL
1 stop14h 11mFrontier
Mon 6/178:22 pmSTL - SEA
1 stop24h 48mFrontier
Deal found 5/15$238
Sun 5/1910:59 pmSEA - STL
1 stop9h 14mMultiple Airlines
Wed 5/2211:36 amSTL - SEA
1 stop10h 53mMultiple Airlines
Deal found 5/15$242
Thu 5/306:05 pmSEA - STL
1 stop16h 23mMultiple Airlines
Mon 6/38:04 pmSTL - SEA
2 stops18h 53mMultiple Airlines
Deal found 5/15$243
Wed 5/2912:40 amSEA - STL
1 stop8h 30mDelta
Mon 6/36:50 pmSTL - SEA
1 stop7h 09mDelta
Deal found 5/16$248
Thu 6/279:42 pmSEA - STL
1 stop12h 12mMultiple Airlines
Sun 6/305:45 pmSTL - SEA
1 stop7h 09mMultiple Airlines
Deal found 5/15$249
Sun 5/1910:59 pmSEA - STL
1 stop9h 14mFrontier
Wed 5/228:04 pmSTL - SEA
1 stop14h 26mFrontier
Deal found 5/16$252
Fri 5/245:40 pmSEA - STL
1 stop24h 50mMultiple Airlines
Wed 5/297:23 pmSTL - SEA
1 stop28h 49mMultiple Airlines
Deal found 5/15$255

Seattle to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Seattle and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to St. Louis in 2024. Check back regularly for other flight deals.
Thu 5/309:49 pmSEA - STL
1 stop9h 47mFrontier
Mon 6/310:21 pmSTL - SEA
1 stop13h 34mFrontier
Deal found 5/15$170
Tue 6/181:47 pmSEA - STL
2 stops18h 55mFrontier
Thu 6/207:29 pmSTL - SEA
1 stop15h 08mFrontier
Deal found 5/15$177
Fri 5/3110:24 pmSEA - STL
1 stop9h 01mFrontier
Sun 6/211:22 pmSTL - SEA
1 stop11h 18mFrontier
Deal found 5/15$178
Thu 5/309:30 amSEA - STL
1 stop22h 06mFrontier
Wed 6/58:02 pmSTL - SEA
1 stop16h 24mFrontier
Deal found 5/15$180
Wed 6/129:41 pmSEA - STL
1 stop14h 51mFrontier
Wed 6/197:29 pmSTL - SEA
1 stop28h 36mFrontier
Deal found 5/15$184
Tue 6/181:47 pmSEA - STL
2 stops18h 55mFrontier
Fri 6/2112:54 pmSTL - SEA
1 stop8h 46mFrontier
Deal found 5/15$187
Fri 6/78:04 amSEA - STL
1 stop23h 25mFrontier
Sun 6/93:37 pmSTL - SEA
1 stop17h 29mFrontier
Deal found 5/15$188
Fri 6/2110:03 pmSEA - STL
1 stop10h 39mFrontier
Mon 6/247:29 pmSTL - SEA
2 stops19h 18mFrontier
Deal found 5/15$189
Tue 6/188:12 pmSEA - STL
1 stop11h 17mFrontier
Fri 6/2112:54 pmSTL - SEA
1 stop8h 46mFrontier
Deal found 5/15$196

Non-stop flights to St. Louis from Seattle

Discover non-stop flight options from Seattle to St. Louis. 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 2,637,452 searches. Data last updated May 16, 2024.
Consider booking one of these non-stop flights heading from Seattle to St. Louis. Select from other flights from Seattle to St. Louis by using the search form above.
Fri 6/75:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Sun 6/97:00 amSTL - SEA
Nonstop4h 14mAlaska Airlines
Deal found 5/15$277
Thu 8/227:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Sun 8/257:31 pmSTL - SEA
Nonstop4h 24mAlaska Airlines
Deal found 5/16$297
Thu 6/207:30 amSEA - STL
Nonstop3h 50mAlaska Airlines
Tue 6/257:00 amSTL - SEA
Nonstop4h 25mAlaska Airlines
Deal found 5/16$307
Thu 10/36:08 pmSEA - STL
Nonstop3h 50mAlaska Airlines
Sat 10/52:25 pmSTL - SEA
Nonstop4h 34mAlaska Airlines
Deal found 5/15$317
Thu 5/305:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Wed 6/57:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 5/15$322
Sat 6/156:10 pmSEA - STL
Nonstop3h 49mAlaska Airlines
Sun 6/237:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Deal found 5/15$327
Fri 6/147:30 amSEA - STL
Nonstop3h 50mAlaska Airlines
Sun 6/167:00 amSTL - SEA
Nonstop4h 25mAlaska Airlines
Deal found 5/16$347
Fri 6/217:30 amSEA - STL
Nonstop3h 50mAlaska Airlines
Mon 6/247:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Deal found 5/16$367
Wed 6/127:37 amSEA - STL
Nonstop3h 59mAlaska Airlines
Wed 6/197:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Deal found 5/15$387

Seattle to St. Louis flights leaving soon

Find last-minute flight options from Seattle to St. Louis 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 2,637,452 searches. Data last updated May 16, 2024.
Check out these flights departing soon from Seattle to St. Louis. To prevent any unwanted surprises, users should verify their flight info before booking.
Fri 5/245:40 pmSEA - STL
1 stop24h 50mMultiple Airlines
Wed 5/297:23 pmSTL - SEA
1 stop28h 49mMultiple Airlines
Deal found 5/15$255
Fri 5/249:04 pmSEA - STL
1 stop11h 09mFrontier
Sun 5/2611:22 pmSTL - SEA
1 stop11h 18mFrontier
Deal found 5/15$259
Fri 5/249:04 pmSEA - STL
1 stop11h 09mFrontier
Tue 5/2810:44 pmSTL - SEA
1 stop10h 50mFrontier
Deal found 5/15$268
Tue 5/211:15 amSEA - STL
1 stop7h 22mAmerican Airlines
Sun 5/265:04 amSTL - SEA
1 stop8h 04mAmerican Airlines
Deal found 5/15$275
Sun 5/261:15 amSEA - STL
1 stop7h 22mAmerican Airlines
Fri 5/316:18 pmSTL - SEA
1 stop7h 57mAmerican Airlines
Deal found 5/15$303
Thu 5/239:49 pmSEA - STL
1 stop9h 47mFrontier
Sat 6/18:04 pmSTL - SEA
2 stops19h 23mFrontier
Deal found 5/15$306
Thu 5/2311:02 pmSEA - STL
1 stop9h 11mFrontier
Sat 6/18:04 pmSTL - SEA
1 stop13h 00mFrontier
Deal found 5/15$311
Wed 5/221:15 amSEA - STL
1 stop9h 16mAmerican Airlines
Tue 5/282:00 pmSTL - SEA
1 stop10h 41mAmerican Airlines
Deal found 5/15$316
Wed 5/2212:40 amSEA - STL
1 stop8h 30mDelta
Sat 6/15:30 pmSTL - SEA
1 stop6h 33mDelta
Deal found 5/15$327

One-way flights to St. Louis from Seattle

Search for one-way flight options from Seattle to St. Louis. 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 2,637,452 searches. Data last updated May 16, 2024.
Users in need of a one-way flight from Seattle to St. Louis can choose from these deals. Those seeking round-trip flights from Seattle to St. Louis should utilize the search form at the the top of the page.
Tue 6/49:40 pmSEA - STL
1 stop13h 25mSpirit Airlines
Deal found 5/15$79
Fri 5/3110:24 pmSEA - STL
1 stop9h 01mFrontier
Deal found 5/15$89
Tue 5/288:14 pmSEA - STL
1 stop11h 22mFrontier
Deal found 5/15$91
Tue 5/218:14 pmSEA - STL
1 stop11h 22mFrontier
Deal found 5/15$94
Fri 6/1410:03 pmSEA - STL
1 stop10h 39mFrontier
Deal found 5/15$95
Tue 8/137:51 pmSEA - STL
1 stop12h 27mFrontier
Deal found 5/15$97
Sat 6/229:00 amSEA - STL
1 stop9h 00mFrontier
Deal found 5/15$99
Sat 5/2510:08 pmSEA - STL
1 stop22h 24mFrontier
Deal found 5/15$100
Tue 6/111:47 pmSEA - STL
2 stops18h 55mFrontier
Deal found 5/15$101

Find flights from Seattle to St. Louis within your budget

Customize your flight search to find flights from Seattle to St. Louis 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 2,637,452 searches. Data last updated May 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$230 - $413

Route

Depart

Return

Price

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 7/12

1 stop16h 52m

Lambert-St Louis

Mon 7/15

1 stop8h 52m

$230

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Tue 7/9

1 stop15h 25m

Lambert-St Louis

Sun 7/14

1 stop12h 08m

$231

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Tue 7/9

1 stop15h 25m

Lambert-St Louis

Sun 7/14

1 stop27h 56m

$234

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 5/29

1 stop8h 30m

Lambert-St Louis

Mon 6/3

1 stop7h 09m

$248

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Tue 5/21

1 stop7h 22m

Lambert-St Louis

Sun 5/26

1 stop8h 04m

$275

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 6/7

Nonstop4h 01m

Lambert-St Louis

Sun 6/9

Nonstop4h 14m

$277

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 7/4

1 stop13h 34m

Lambert-St Louis

Sun 7/7

1 stop15h 51m

$289

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 6/12

3 stops31h 54m

Lambert-St Louis

Wed 6/19

1 stop8h 14m

$293

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 5/30

2 stops9h 10m

Lambert-St Louis

Wed 6/5

1 stop8h 05m

$413

Flights are sorted by cheapest first

Deals found on 5/16

When is the best time to book a flight from Seattle to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to St. Louis. Price data was last updated on May 10, 2024.
The best time to book flights from Seattle to St. Louis is 71 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

When is the cheapest time to fly from Seattle to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Seattle to St. Louis. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to St. Louis flight should consider departing on Friday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from Seattle to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to St. Louis is currently $94 while a round-trip flight costs $277. Price data was last updated on May 12, 2024.

Currently, September is the cheapest month in which you can book a flight from Seattle to St. Louis (average of $320). Flying from Seattle to St. Louis in July is currently the most expensive (average of $369). 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.

January

$326

February

$331

March

$357

April

$337

May

$342

June

$366

July

$369

August

$336

September

$320

October

$324

November

$336

December

$326

Temperature and rainfall in St. Louis by month

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

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated May 16, 2024.
Get a feel of what it's like to fly with Frontier, Delta and American Airlines from Seattle to St. Louis by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Food

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Alaska Airlines
8.1
Very good
9,157 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Food

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Delta
8.0
Very good
10,673 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Food

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

United Airlines
7.4
Good
10,924 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Food

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

American Airlines
7.3
Good
14,514 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Food

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Sun Country Air
7.2
Good
630 reviews
Alaska Airlines
8.1
Very good
9,157 reviews
Check prices

Food

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Entertainment

7.3

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Related info for your journey

Find useful and relevant information for your journey from Seattle to St. Louis. 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 Seattle to St. Louis?

    If you book a flight from Seattle to St. Louis, you will be flying from Seattle/Tacoma Intl to Lambert-St Louis. Flights to Lambert-St Louis (STL) from Seattle/Tacoma Intl (SEA) take 3h 48m for a nonstop flight. There are 6 flights from Seattle/Tacoma Intl to St. Louis per day from 6 airlines.

  • Can I find flights from Seattle to St. Louis for under $300 on Cheapflights?

    Yes, there are multiple flights from Seattle to St. Louis for under $300. The cheapest flight booked recently is on Frontier for just $230, but on average you can expect to pay $247.

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

    Cheapflights has at least 19 direct flights from Seattle to St. Louis under $300. A good price for a nonstop flight from Seattle to St. Louis is less than $444.

  • Are there last-minute flights available from Seattle to St. Louis for under $300?

    There are currently 20+ open flights from Seattle to St. Louis within the next 7 days for less than $300.

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

    You can find nonstop flights on the following days: Tuesday, Thursday.

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

    The Seattle/Tacoma Intl to Lambert-St Louis flight path was viewed by 28 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    On average 8 flights depart from Seattle to St. Louis per day.
    Afternoon (Noon - 6pm) - 50% of flight departures
    Evening (6pm - Midnight) - 50% of flight departures

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

    Frontier, Delta, and American Airlines can get you from Seattle to St. Louis in just under 7h 22m. Your travel time can differ by up to 9h 30m. Airlines will cover a distance of 1714 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Seattle to St. Louis round-trip from $230. Other airlines that can offer you cheap pricing are Delta, from $248, and American Airlines, from $275. These flights start at 32% lower than the current average price 3 months from now.

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

    $79 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Frontier and Delta, with prices starting from $89 and $108, respectively.

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

    American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from Seattle to St. Louis.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to St. Louis on time: Singapore Airlines (85%), American Airlines (83%), Alaska Airlines (83%).

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

    The cheapest flight price from Seattle to St. Louis is $138. On average you can expect to pay $715. The most popular route, (Seattle/Tacoma Intl - Lambert-St Louis), can usually be booked for $177.

  • What does SEA to STL mean?

    SEA stands for Seattle/Tacoma Intl Airport, while STL stands for Lambert-St Louis 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.

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

    The amount of baggage you can bring on your Seattle to St. Louis 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 Seattle to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to St. Louis 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 Seattle to St. Louis that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to St. Louis 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 Seattle to St. Louis that allow pets onboard?

    Many airlines flying from Seattle to St. Louis 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 Seattle to St. Louis?

    Yes, you can often find last-minute deals on Seattle to St. Louis 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 Seattle to St. Louis flight deals updated?

    The Seattle to St. Louis flight deals you see on this page were last updated on 5/15.

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Alternative routes for Seattle to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.

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Top 6 airlines flying from Seattle to St. Louis

Discover the top 6 airlines that operate flights from Seattle to St. Louis. 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 2,637,452 searches. Data last updated May 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$115Average$248FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapest$153Average$281FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Spirit AirlinesCheapest$156Average$306FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
American AirlinesCheapest$157Average$412FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$167Average$309FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapest$192Average$366FlexibilityNo cancel feeOn-time75%
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Search flights from Seattle to St. Louis by cabin class

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

Find hourly flight availability from Seattle to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 16, 2024.
1%of flight departuresEarly morningMidnight to 6 am
41%of flight departuresMorning6 am to noon
58%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Seattle to St. Louis

Explore weekly flight availability from Seattle to St. Louis. 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 16, 2024.
Sunday9daily flights
Monday8daily flights
Tuesday4daily flights
Wednesday8daily flights
Thursday4daily flights
Friday8daily flights
Saturday3daily flights

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How does Cheapflights help users find flights from Seattle to St. Louis?

Cheapflights makes it easy to find Seattle to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to St. Louis from Seattle.

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Yes, we can. To see specific flights from Seattle to St. Louis with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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