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Cheap flights from Seattle to St. Louis (SEA - STL) from $59

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.
SEA — STL
Jun 2 — Jun 91
From?
To?
Sun 6/2
Sun 6/9
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 28, 2024.

Popular in

July

Cheapest in

January

Round-trip from

$319

One-way from

$124
High demand for flights, 21% 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
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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 $342. 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 28% versus a flight at noon.

Cheap Spirit Airlines flights from Seattle to St. Louis

Explore cheap flight options specifically provided by Spirit Airlines 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 2,740,132 searches. Data last updated May 28, 2024.
Take a peek at the cheapest Spirit Airlines flights we've detected traveling from Seattle to St. Louis. Make sure to check back often as deals are often changing.
Mon 8/265:00 pmSEA - STL
2 stops20h 41mSpirit Airlines
Tue 9/310:34 amSTL - SEA
2 stops35h 47mSpirit Airlines
Deal found 5/27$245
Tue 7/29:41 pmSEA - STL
1 stop13h 24mSpirit Airlines
Tue 7/93:23 pmSTL - SEA
3 stops26h 52mSpirit Airlines
Deal found 5/27$263
Mon 8/195:00 pmSEA - STL
2 stops20h 41mSpirit Airlines
Sun 8/256:18 pmSTL - SEA
1 stop16h 27mSpirit Airlines
Deal found 5/28$266
Wed 7/105:10 amSEA - STL
1 stop7h 56mSpirit Airlines
Tue 7/3011:26 amSTL - SEA
3 stops30h 49mSpirit Airlines
Deal found 5/28$268
Fri 7/125:10 amSEA - STL
1 stop7h 56mSpirit Airlines
Tue 7/1611:26 amSTL - SEA
3 stops30h 49mSpirit Airlines
Deal found 5/27$276
Sat 8/175:00 pmSEA - STL
2 stops22h 28mSpirit Airlines
Thu 8/226:18 pmSTL - SEA
1 stop16h 27mSpirit Airlines
Deal found 5/28$286
Mon 8/55:10 amSEA - STL
1 stop7h 56mSpirit Airlines
Fri 8/94:02 pmSTL - SEA
1 stop9h 52mSpirit Airlines
Deal found 5/28$336

  • If you’re traveling from Seattle to St. Louis, one of the more common airlines traveling that route is Spirit Airlines. Seattle to St. Louis flights are typically 67% cheaper than other airlines traveling the same route. Flights from Spirit Airlines typically cost $365.88 RT. The cheapest Spirit Airlines flight found for this route was $188. When traveling from Seattle to St. Louis on Spirit Airlines, the most popular airport to depart from is Seattle/Tacoma Intl Airport and the most popular airport to arrive at is Lambert-St Louis Airport. When flying from Seattle to St. Louis, Spirit Airlines flights are 11% more popular than any other airline flying that same route.

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 2,740,132 searches. Data last updated May 28, 2024.
Some of the lowest-priced Frontier flights we've found at this time heading from Seattle to St. Louis. Deals are refreshing constantly so come back soon for more options.
Mon 7/110:03 pmSEA - STL
1 stop11h 11mFrontier
Thu 7/119:44 pmSTL - SEA
1 stop12h 55mFrontier
Deal found 5/28$228
Fri 6/79:49 pmSEA - STL
1 stop10h 53mFrontier
Fri 6/1412:54 pmSTL - SEA
1 stop8h 46mFrontier
Deal found 5/28$229
Mon 7/110:03 pmSEA - STL
1 stop11h 11mFrontier
Sat 7/65:38 pmSTL - SEA
1 stop17h 06mFrontier
Deal found 5/27$230
Mon 8/59:45 pmSEA - STL
1 stop21h 46mFrontier
Sat 8/105:38 pmSTL - SEA
1 stop22h 50mFrontier
Deal found 5/27$232
Thu 7/259:45 pmSEA - STL
1 stop12h 01mFrontier
Tue 8/610:32 pmSTL - SEA
2 stops16h 02mFrontier
Deal found 5/27$233
Tue 7/28:12 pmSEA - STL
1 stop11h 17mFrontier
Tue 7/97:49 pmSTL - SEA
2 stops18h 45mFrontier
Deal found 5/27$234
Sat 7/139:17 amSEA - STL
1 stop9h 45mFrontier
Tue 7/1610:32 pmSTL - SEA
1 stop16h 02mFrontier
Deal found 5/26$235
Thu 7/119:45 pmSEA - STL
1 stop12h 01mFrontier
Sun 7/1410:32 pmSTL - SEA
1 stop12h 08mFrontier
Deal found 5/27$236
Thu 6/209:42 pmSEA - STL
1 stop12h 12mFrontier
Sat 6/228:02 pmSTL - SEA
1 stop15h 08mFrontier
Deal found 5/27$238

  • One of the most popular airlines traveling from Seattle to St. Louis is Frontier. Flights from Frontier traveling this route typically cost $395.70 RT. This price is typically 58% cheaper than other airlines that offer Seattle to St. Louis flights. When booking this route, the cheapest RT price found was $157. Seattle/Tacoma Intl Airport is the most common Seattle airport to take off from when flying to St. Louis. Lambert-St Louis Airport is the most popular arrival airport in St. Louis. When flying from Seattle to St. Louis, Frontier flights are 1% more popular than any other airline flying that same route.

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 2,740,132 searches. Prices were last updated on May 28, 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 6/69:32 pmSEA - STL
1 stop14h 44mSpirit Airlines
Mon 6/102:41 pmSTL - SEA
1 stop20h 18mSpirit Airlines
Deal found 5/27$183
Sat 6/110:08 pmSEA - STL
1 stop22h 24mFrontier
Mon 6/310:21 pmSTL - SEA
1 stop13h 34mFrontier
Deal found 5/27$185
Sat 6/110:08 pmSEA - STL
1 stop22h 24mFrontier
Mon 6/38:04 pmSTL - SEA
2 stops18h 53mFrontier
Deal found 5/27$190
Wed 6/129:41 pmSEA - STL
1 stop14h 51mMultiple Airlines
Wed 6/191:55 pmSTL - SEA
1 stop8h 14mMultiple Airlines
Deal found 5/27$191
Tue 6/259:41 pmSEA - STL
1 stop13h 24mSpirit Airlines
Tue 7/23:23 pmSTL - SEA
2 stops30h 46mSpirit Airlines
Deal found 5/26$197
Thu 6/69:32 pmSEA - STL
1 stop14h 44mMultiple Airlines
Mon 6/107:29 pmSTL - SEA
2 stops19h 18mMultiple Airlines
Deal found 5/27$206
Tue 6/118:12 pmSEA - STL
1 stop11h 17mFrontier
Fri 6/2112:54 pmSTL - SEA
1 stop8h 46mFrontier
Deal found 5/27$209
Sun 6/210:59 pmSEA - STL
1 stop9h 14mFrontier
Fri 6/710:59 pmSTL - SEA
1 stop11h 10mFrontier
Deal found 5/27$213
Sat 6/1511:28 amSEA - STL
1 stop25h 09mFrontier
Mon 6/178:22 pmSTL - SEA
1 stop14h 17mFrontier
Deal found 5/27$214

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 2,740,132 searches. Data last updated May 28, 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.
Wed 8/76:00 amSEA - STL
1 stop8h 46mDelta
Fri 8/96:30 pmSTL - SEA
1 stop7h 27mDelta
Deal found 5/27$226
Mon 7/110:03 pmSEA - STL
1 stop11h 11mFrontier
Thu 7/119:44 pmSTL - SEA
1 stop12h 55mFrontier
Deal found 5/28$228
Mon 6/109:49 pmSEA - STL
1 stop10h 53mFrontier
Fri 6/2112:54 pmSTL - SEA
1 stop8h 46mFrontier
Deal found 5/27$229
Mon 7/110:03 pmSEA - STL
1 stop11h 11mFrontier
Sat 7/65:38 pmSTL - SEA
1 stop17h 06mFrontier
Deal found 5/27$230
Wed 7/105:10 amSEA - STL
1 stop7h 56mMultiple Airlines
Tue 7/3010:32 pmSTL - SEA
2 stops16h 02mMultiple Airlines
Deal found 5/27$231
Mon 9/3012:30 amSEA - STL
1 stop7h 50mDelta
Tue 10/86:59 pmSTL - SEA
1 stop7h 00mDelta
Deal found 5/27$232
Thu 7/259:45 pmSEA - STL
1 stop12h 01mFrontier
Tue 8/610:32 pmSTL - SEA
2 stops16h 02mFrontier
Deal found 5/27$233
Tue 7/28:12 pmSEA - STL
1 stop11h 17mFrontier
Tue 7/97:49 pmSTL - SEA
2 stops18h 45mFrontier
Deal found 5/27$234
Sat 7/139:17 amSEA - STL
1 stop9h 45mFrontier
Tue 7/1610:32 pmSTL - SEA
1 stop16h 02mFrontier
Deal found 5/26$235

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 2,740,132 searches. Data last updated May 28, 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.
Mon 8/266:08 pmSEA - STL
Nonstop3h 51mAlaska Airlines
Tue 9/37:00 amSTL - SEA
Nonstop4h 26mAlaska Airlines
Deal found 5/28$277
Thu 8/226:08 pmSEA - STL
Nonstop3h 51mAlaska Airlines
Sun 8/257:31 pmSTL - SEA
Nonstop4h 24mAlaska Airlines
Deal found 5/28$297
Thu 6/207:30 amSEA - STL
Nonstop3h 50mAlaska Airlines
Sat 6/227:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Deal found 5/27$307
Mon 6/105:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Wed 6/197:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Deal found 5/27$322
Mon 6/105:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Fri 6/217:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Deal found 5/27$342
Sat 8/247:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Sat 8/317:00 amSTL - SEA
Nonstop4h 26mAlaska Airlines
Deal found 5/28$347
Thu 6/276:10 pmSEA - STL
Nonstop3h 49mAlaska Airlines
Sun 6/307:00 amSTL - SEA
Nonstop4h 25mAlaska Airlines
Deal found 5/27$362
Fri 6/217:30 amSEA - STL
Nonstop3h 50mAlaska Airlines
Mon 6/247:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Deal found 5/28$367
Thu 6/276:10 pmSEA - STL
Nonstop3h 49mAlaska Airlines
Sun 7/77:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Deal found 5/28$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 2,740,132 searches. Data last updated May 28, 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 6/79:49 pmSEA - STL
1 stop10h 53mFrontier
Fri 6/1412:54 pmSTL - SEA
1 stop8h 46mFrontier
Deal found 5/28$229
Fri 6/73:34 pmSEA - STL
1 stop15h 55mMultiple Airlines
Sun 6/96:05 pmSTL - SEA
1 stop15h 57mMultiple Airlines
Deal found 5/28$238
Thu 6/610:58 pmSEA - STL
2 stops21h 01mMultiple Airlines
Sun 6/96:05 pmSTL - SEA
1 stop15h 57mMultiple Airlines
Deal found 5/27$243
Thu 6/69:32 pmSEA - STL
1 stop14h 44mMultiple Airlines
Mon 6/107:41 pmSTL - SEA
Nonstop4h 19mMultiple Airlines
Deal found 5/27$283
Fri 6/79:13 amSEA - STL
1 stop5h 58mMultiple Airlines
Sun 6/96:05 pmSTL - SEA
2 stops16h 27mMultiple Airlines
Deal found 5/28$302
Fri 6/79:49 pmSEA - STL
1 stop10h 53mFrontier
Fri 6/147:29 pmSTL - SEA
2 stops21h 07mFrontier
Deal found 5/27$304
Sun 6/22:27 pmSEA - STL
2 stops17h 46mFrontier
Fri 6/77:29 pmSTL - SEA
2 stops21h 07mFrontier
Deal found 5/27$306
Fri 6/79:49 pmSEA - STL
1 stop10h 53mFrontier
Sat 6/87:29 pmSTL - SEA
2 stops21h 15mFrontier
Deal found 5/28$312
Wed 6/512:20 amSEA - STL
1 stop6h 34mAmerican Airlines
Mon 6/103:27 pmSTL - SEA
1 stop9h 30mAmerican Airlines
Deal found 5/27$326

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 2,740,132 searches. Data last updated May 28, 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 9/105:00 pmSEA - STL
2 stops15h 46mSpirit Airlines
Deal found 5/27$59
Tue 8/138:54 pmSEA - STL
1 stop11h 52mSpirit Airlines
Deal found 5/26$78
Tue 6/259:41 pmSEA - STL
1 stop13h 24mSpirit Airlines
Deal found 5/27$80
Sat 10/1911:59 pmSEA - STL
1 stop8h 05mAmerican Airlines
Deal found 5/27$97
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/27$98
Sat 6/229:00 amSEA - STL
1 stop9h 00mFrontier
Deal found 5/27$110
Tue 9/109:38 amSEA - STL
3 stops34h 36mSpirit Airlines
Deal found 5/27$112
Mon 9/3011:59 pmSEA - STL
1 stop6h 53mAmerican Airlines
Deal found 5/27$113
Thu 6/2010:58 pmSEA - STL
1 stop9h 44mFrontier
Deal found 5/27$114

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 2,740,132 searches. Data last updated May 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$226 - $350

Route

Depart

Return

Price

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 8/7

1 stop8h 46m

Lambert-St Louis

Tue 8/13

1 stop7h 29m

$226

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Mon 7/1

1 stop11h 11m

Lambert-St Louis

Thu 7/11

1 stop12h 55m

$228

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 6/7

1 stop10h 53m

Lambert-St Louis

Fri 6/14

1 stop8h 46m

$229

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 7/10

1 stop7h 56m

Lambert-St Louis

Tue 7/30

2 stops16h 02m

$231

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Mon 8/26

2 stops20h 41m

Lambert-St Louis

Tue 9/3

2 stops35h 47m

$245

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 6/13

1 stop10h 42m

Lambert-St Louis

Tue 6/18

1 stop15h 52m

$275

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Mon 8/26

Nonstop3h 51m

Lambert-St Louis

Tue 9/3

Nonstop4h 26m

$277

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 8/16

1 stop7h 49m

Lambert-St Louis

Sat 8/24

1 stop10h 22m

$311

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sun 8/25

1 stop12h 13m

Lambert-St Louis

Tue 9/3

1 stop11h 36m

$350

Flights are sorted by cheapest first

Deals found on 5/27

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 24, 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 19, 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. Saturday at noon 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 Seattle to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Seattle 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 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 28, 2024.
Get a feel of what it's like to fly with Spirit Airlines, Frontier and Alaska 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
9,194 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Crew

8.6

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
9,194 reviews
Alaska Airlines
8.1
Very good
9,194 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Crew

8.6

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
10,476 reviews
Alaska Airlines
8.1
Very good
9,194 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Crew

8.6

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
10,799 reviews
Alaska Airlines
8.1
Very good
9,194 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Crew

8.6

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
14,316 reviews
Alaska Airlines
8.1
Very good
9,194 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Crew

8.6

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
597 reviews
Alaska Airlines
8.1
Very good
9,194 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.3

Crew

8.6

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 Delta for just $226, but on average you can expect to pay $236.

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

    Cheapflights has at least 20 direct flights from Seattle to St. Louis under $300. A good price for a nonstop flight from Seattle to St. Louis is less than $404.

  • 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.

  • 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.

  • 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 $226. Other airlines that can offer you cheap pricing are Frontier, from $228, and Spirit Airlines, from $245. These flights start at 33% lower than the current average price 3 months from now.

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

    $59 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 American Airlines and Frontier, with prices starting from $97 and $98, respectively.

  • 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 $118. On average you can expect to pay $393. The most popular route, (Seattle/Tacoma Intl - Lambert-St Louis), can usually be booked for $141.

  • 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 5/28.

  • 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.

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

    Currently, September is the cheapest month in which you can book a flight from Seattle to St. Louis (average of $319). Flying from Seattle to St. Louis in July is currently the most expensive (average of $366). 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 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 2,740,132 searches. Data last updated May 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$107Average$247FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapest$153Average$275FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Spirit AirlinesCheapest$155Average$299FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
American AirlinesCheapest$157Average$396FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Alaska AirlinesCheapest$188Average$366FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapest$193Average$313FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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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 28, 2024.
0%of flight departuresEarly morningMidnight to 6 am
53%of flight departuresMorning6 am to noon
47%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 28, 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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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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