$101+ Cheap flights from Seattle to St. Louis (SEA - STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STL
Dec 10 — Dec 171
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Lambert-St Louis are usually found in January or February, booked 77 days in advance, depart on a Tuesday or Thursday and return on a Friday
Cheap flight deals from Seattle to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to St. LouisExplore the most affordable flight options available from Seattle to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 10, 2026.
Explore the most affordable flight options available from Seattle to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 10, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/114:58 pm -
1 stop15h 59m
Sun 12/132:27 pm -
1 stop23h 49m
Deal found 11/6![Frontier logo]()
$236
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/303:50 pm -
1 stop5h 38m
Wed 1/67:05 am -
1 stop7h 21m
Deal found 11/6![Delta logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/44:58 pm -
1 stop15h 59m
Fri 12/117:54 pm -
1 stop21h 49m
Deal found 11/6![Frontier logo]()
$251
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/126:45 am -
2 stops7h 35m
Wed 12/1611:20 am -
1 stop8h 30m
Deal found 11/9![Southwest logo]()
$252
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/116:00 am -
1 stop9h 20m
Wed 12/166:03 am -
1 stop8h 28m
Deal found 11/6![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/155:05 am -
1 stop5h 51m
Tue 12/155:40 pm -
1 stop7h 03m
Deal found 11/5![United Airlines logo]()
$261
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/132:05 pm -
1 stop6h 54m
Mon 12/148:17 am -
1 stop8h 06m
Deal found 11/6![United Airlines logo]()
$262
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/711:15 pm -
1 stop8h 04m
Fri 12/116:03 am -
1 stop6h 42m
Deal found 11/6![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:30 am -
1 stop8h 40m
Mon 12/148:25 am -
2 stops12h 40m
Deal found 11/7![Southwest logo]()
$268
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/106:30 am -
1 stop8h 40m
Mon 12/148:25 am -
2 stops12h 40m
Deal found 11/8![Southwest logo]()
$278
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/145:05 am -
1 stop5h 48m
Tue 12/158:40 am -
2 stops9h 42m
Deal found 11/6![United Airlines logo]()
$280
Best flights from Seattle to St. LouisDiscover carefully curated flight deals from Seattle to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 10, 2026.
Discover carefully curated flight deals from Seattle to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 10, 2026.
This Delta deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/61:31 pm -
1 stop6h 11m
Sat 2/272:12 pm -
1 stop6h 19m
Deal found 11/5![Delta logo]()
$247
This United Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/147:00 am -
1 stop9h 11m
Mon 12/216:09 pm -
1 stop7h 07m
Deal found 11/9![United Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/126:45 am -
2 stops7h 35m
Wed 12/1611:20 am -
2 stops9h 45m
Deal found 11/9![Southwest logo]()
$297
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/215:25 am -
2 stops9h 00m
Mon 1/2512:35 pm -
1 stop7h 05m
Deal found 11/8![Southwest logo]()
$303
This United Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/85:05 am -
1 stop5h 51m
Tue 12/151:18 pm -
2 stops10h 03m
Deal found 11/9![United Airlines logo]()
$323
This Southwest deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/95:40 am -
2 stops9h 45m
Mon 12/148:25 am -
2 stops12h 40m
Deal found 11/7![Southwest logo]()
$313
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/39:01 am -
1 stop7h 10m
Thu 12/108:17 am -
1 stop8h 06m
Deal found 11/5![United Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/15:40 am -
2 stops9h 45m
Tue 12/155:55 am -
1 stop8h 15m
Deal found 11/8![Southwest logo]()
$323
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/811:05 am -
2 stops10h 05m
Sun 12/135:40 am -
1 stop9h 35m
Deal found 11/9![Southwest logo]()
$333
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/85:15 am -
2 stops13h 55m
Tue 12/152:05 pm -
2 stops10h 15m
Deal found 11/9![Southwest logo]()
$374
This Southwest deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2211:30 am -
2 stops11h 35m
Fri 2/265:40 pm -
2 stops9h 15m
Deal found 11/5![Southwest logo]()
$377
Last-minute flights from Seattle to St. LouisDiscover last-minute flight deals from Seattle to St. Louis. Data last updated November 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to St. Louis. Data last updated November 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/44:58 pm -
1 stop15h 59m
Fri 12/117:54 pm -
1 stop21h 49m
Deal found 11/6![Frontier logo]()
$251
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/711:15 pm -
1 stop8h 04m
Fri 12/116:03 am -
1 stop6h 42m
Deal found 11/6![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:30 am -
1 stop8h 40m
Mon 12/148:25 am -
2 stops12h 40m
Deal found 11/7![Southwest logo]()
$268
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/106:30 am -
1 stop8h 40m
Mon 12/148:25 am -
2 stops12h 40m
Deal found 11/8![Southwest logo]()
$278
This Cheapflightsfares deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/114:58 pm -
1 stop15h 59m
Sun 12/132:27 pm -
1 stop23h 49m
Deal found 11/6![Frontier logo]()
$236
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/116:00 am -
1 stop9h 20m
Wed 12/166:03 am -
1 stop8h 28m
Deal found 11/6![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/126:45 am -
2 stops7h 35m
Wed 12/1611:20 am -
1 stop8h 30m
Deal found 11/9![Southwest logo]()
$252
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/132:05 pm -
1 stop6h 54m
Mon 12/148:17 am -
1 stop8h 06m
Deal found 11/6![United Airlines logo]()
$262
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/145:05 am -
1 stop5h 48m
Tue 12/158:40 am -
2 stops9h 42m
Deal found 11/6![United Airlines logo]()
$280
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/155:05 am -
1 stop5h 51m
Tue 12/155:40 pm -
1 stop7h 03m
Deal found 11/5![United Airlines logo]()
$261
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/303:50 pm -
1 stop5h 38m
Wed 1/67:05 am -
1 stop7h 21m
Deal found 11/6![Delta logo]()
$247
One-way flights from Seattle to St. LouisSearch for one-way flight options from Seattle to St. Louis. Find affordable one-way fares based on user searches. Data last updated November 10, 2026.
Search for one-way flight options from Seattle to St. Louis. Find affordable one-way fares based on user searches. Data last updated November 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/1011:53 am -
1 stop7h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/224:29 pm -
1 stop15h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/267:47 pm -
1 stop18h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Frontier logo]()
$119
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2911:44 pm -
1 stop8h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![United Airlines logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/216:25 pm -
1 stop20h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Frontier logo]()
$129
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/141:45 pm -
1 stop7h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Delta logo]()
$134
This United Airlines deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/255:00 am -
2 stops10h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![United Airlines logo]()
$139
This CheapOair deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/44:58 pm -
1 stop15h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$141
This Southwest deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/98:10 am -
2 stops10h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Southwest logo]()
$169
Find 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 November 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $236 (Cheapflightsfares) |
One-way from | $101 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $371 |
Good round-trip deal | $489 or less |
Good one-way deal | $179 or less |
Cheapflights Fare Finder
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 7,457,451 searches. Data last updated November 10, 2026.
Use the filters below to find and compare flights from Seattle to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Wed 1/20
12:30 pm-8:38 pm
1 stop6h 08m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$124
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Sat 1/23
11:12 pm-10:12 am
1 stop9h 00m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$124
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Sat 1/2
6:00 am-2:44 pm
1 stop6h 44m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$124
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Tue 12/29
11:44 pm-10:42 am
1 stop8h 58m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$124
Quickest round-trip
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Tue 12/15
8:25 am-4:30 pm
1 stop6h 05m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$124
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Tue 1/26
6:00 am-2:44 pm
1 stop6h 44m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$124
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Sat 1/23
5:00 am-5:13 pm
2 stops10h 13m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$129
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Sun 12/27
11:59 pm-10:35 am
1 stop8h 36m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$134
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Mon 12/14
1:45 pm-11:26 pm
1 stop7h 41m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$134
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Fri 12/25
5:00 am-5:08 pm
2 stops10h 08m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$139
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Seattle to St. Louis
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to St. Louis in November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
SEA-STL
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.
Cheapflights Insights
Everything you need to know about your flight from Seattle to St. Louis
How far ahead should I book a flight from Seattle to St. Louis?
The best time to book flights from Seattle to St. Louis is 76 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.
What is the cheapest month to book a flight from Seattle to St. Louis?
Currently, January is the cheapest month in which you can book a flight from Seattle to St. Louis (average of $237). Flying from Seattle to St. Louis in December is currently the most expensive (average of $608). 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.
What is the cheapest time of day to fly from SEA to STL?
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 November 10, 2026.
When flying from Seattle to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
The best insider tips for Seattle to St. Louis flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to St. Louis trip
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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 November 10, 2026.
Peruse reviews from past customers who have flown with Southwest,Alaska Airlines, andDelta from Seattle to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.4
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.4
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.4
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.4
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.4
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.4
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
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.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Wentzville
Maryland Heights
Chesterfield
Edwardsville
Glencoe
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Seattle and St. Louis flights
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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 7,457,451 searches. Data last updated November 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$113 | Average$337 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$191 | Average$434 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$395 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$210 | Average$344 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$221 | Average$476 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$246 | Average$370 | FlexibilityNo cancel fee | On-time69% |