Cheap Flights from St. Louis to Seattle
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Flights from St. Louis to Seattle
Airlines Flying from St. Louis to Seattle
Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.
Flight deals from St. Louis to Seattle
We've found these cheap flights for you. You can book one-way or return flight tickets.
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Round-trip
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One way
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Cheapest nonstop
STL 19:324h 28mDirectSEA 22:00St. Louis - Seattle | Tue, Jun 24 | Hawaiian Airlines
SEA 18:063h 53mDirectSTL 23:59Seattle - St. Louis | Mon, Jun 30 | Hawaiian AirlinesHK$1,658 HK$1,88612% OFF12% OFFHK$1,886 HK$1,658 -
STL 19:324h 28mDirectSEA 22:00St. Louis - Seattle | Tue, Jun 24 | Alaska Airlines
SEA 18:063h 53mDirectSTL 23:59Seattle - St. Louis | Mon, Jun 30 | Alaska AirlinesHK$1,679 HK$1,88611% OFF11% OFFHK$1,886 HK$1,679 -
STL 17:388h 15m1 stopsSEA 23:53St. Louis - Seattle | Tue, Jun 24 | Delta Air Lines
SEA 23:536h 46m1 stopsSTL 08:39Seattle - St. Louis | Mon, Jun 30 | Delta Air LinesHK$1,259 HK$1,88633% OFF33% OFFHK$1,886 HK$1,259 -
STL 05:007h 15m1 stopsSEA 10:15St. Louis - Seattle | Thu, May 29 | American Airlines
SEA 14:207h 31m1 stopsSTL 23:51Seattle - St. Louis | Wed, Jun 4 | American AirlinesHK$1,29631% OFFHK$1,886 HK$1,296 -
STL 19:196h 40m1 stopsSEA 23:59St. Louis - Seattle | Mon, Jun 2 | Delta Air Lines
SEA 06:009h1 stopsSTL 17:00Seattle - St. Louis | Tue, Jun 3 | Delta Air LinesHK$1,30131% OFFHK$1,886 HK$1,301
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STL 17:378h 15m1 stopsSEA 23:52St. Louis - Seattle | Mon, Jul 14 | Delta Air Lines
SEA 23:596h 35m1 stopsSTL 08:34Seattle - St. Louis | Mon, Jul 21 | Delta Air LinesHK$1,34428% OFFHK$1,886 HK$1,344
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STL 19:156h 44m1 stopsSEA 23:59St. Louis - Seattle | Mon, Jul 7 | Delta Air Lines
SEA 23:598h 39m1 stopsSTL 10:38Seattle - St. Louis | Fri, Jul 11 | Delta Air LinesHK$1,35828% OFFHK$1,886 HK$1,358
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STL 14:1510h 7m1 stopsSEA 22:22St. Louis - Seattle | Tue, Jun 10 | Delta Air Lines
SEA 23:596h 40m1 stopsSTL 08:39Seattle - St. Louis | Tue, Jun 17 | Delta Air LinesHK$1,37727% OFFHK$1,886 HK$1,377
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STL 14:1510h 6m1 stopsSEA 22:21St. Louis - Seattle | Wed, Jul 9 | Delta Air Lines
SEA 23:596h 35m1 stopsSTL 08:34Seattle - St. Louis | Wed, Jul 16 | Delta Air LinesHK$1,38227% OFFHK$1,886 HK$1,382
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STL 14:1510h 6m1 stopsSEA 22:21St. Louis - Seattle | Mon, Jul 21 | Delta Air Lines
SEA 23:596h 35m1 stopsSTL 08:34Seattle - St. Louis | Tue, Jul 22 | Delta Air LinesHK$1,39526% OFFHK$1,886 HK$1,395
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STL 17:378h 19m1 stopsSEA 23:56St. Louis - Seattle | Tue, Jul 22 | Delta Air Lines
SEA 21:559h 38m1 stopsSTL 09:33Seattle - St. Louis | Thu, Jul 24 | Delta Air LinesHK$1,39526% OFFHK$1,886 HK$1,395
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STL 19:156h 48m1 stopsSEA 00:03St. Louis - Seattle | Mon, Jun 9 | Delta Air Lines
SEA 23:536h 46m1 stopsSTL 08:39Seattle - St. Louis | Fri, Jun 13 | Delta Air LinesHK$1,39826% OFFHK$1,886 HK$1,398
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STL 13:0017h 25m1 stopsSEA Invalid DateSt. Louis - Seattle | Mon, May 26 | Normal Airline
SEA 15:006hDirectSTL 16:00Seattle - St. Louis | Wed, May 28 | Normal AirlineFind More FlightsFind More Flights
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Cheapest nonstop
STL 19:324h 28mDirectSEA 22:00St. Louis - Seattle | Tue, Jul 15 | Hawaiian AirlinesHK$870 HK$99613% OFF13% OFFHK$996 HK$870
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STL 19:324h 28mDirectSEA 22:00St. Louis - Seattle | Sat, Jun 14 | Hawaiian AirlinesHK$886 HK$99611% OFF11% OFFHK$996 HK$886
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STL 19:156h 44m1 stopsSEA 23:59St. Louis - Seattle | Mon, Jul 7 | Delta Air LinesHK$670 HK$99633% OFF33% OFFHK$996 HK$670
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STL 14:1510h 7m1 stopsSEA 22:22St. Louis - Seattle | Tue, Jun 17 | Delta Air LinesHK$69330% OFFHK$996 HK$693
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STL 19:156h 49m1 stopsSEA 00:04St. Louis - Seattle | Wed, Jun 25 | Delta Air LinesHK$70328% OFFHK$996 HK$703
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STL 19:156h 48m1 stopsSEA 00:03St. Louis - Seattle | Fri, Jun 20 | Delta Air LinesHK$70428% OFFHK$996 HK$704
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STL 17:378h 19m1 stopsSEA 23:56St. Louis - Seattle | Tue, Jul 22 | Delta Air LinesHK$70528% OFFHK$996 HK$705
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STL 19:156h 48m1 stopsSEA 00:03St. Louis - Seattle | Fri, Jun 13 | Delta Air LinesHK$70628% OFFHK$996 HK$706
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STL 19:156h 44m1 stopsSEA 23:59St. Louis - Seattle | Tue, Jul 15 | Delta Air LinesHK$70628% OFFHK$996 HK$706
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STL 17:378h 15m1 stopsSEA 23:52St. Louis - Seattle | Fri, Jul 11 | Delta Air LinesHK$70828% OFFHK$996 HK$708
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STL 14:1510h 6m1 stopsSEA 22:21St. Louis - Seattle | Wed, Jul 16 | Delta Air LinesHK$70828% OFFHK$996 HK$708
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STL 14:1510h 6m1 stopsSEA 22:21St. Louis - Seattle | Mon, Jul 21 | Delta Air LinesHK$70828% OFFHK$996 HK$708
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STL 13:0017h 25m1 stopsSEA Invalid DateSt. Louis - Seattle | Mon, May 26 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
Flight Information from St. Louis to Seattle
| Cheapest one-way flight price | HK$669 |
|---|---|
| Cheapest return ticket price | HK$1,657 |
| Off-season travel month | May |
| Peak season for travel | February |
| Flight distance | 2,765.15km |
| Average flight time | 4 hours 36 minutes |
| Popular airline | United Airlines |
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Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
FAQ
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When are flight tickets from St. Louis (STL) to Seattle (SEA) the cheapest?
Airlines adjust prices for flights from St. Louis to Seattle based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much are flights from St. Louis (STL) to Seattle (SEA) cost?
According to Trip.com's data, the lowest price is around HK$2,601. -
How long is the flight from St. Louis (STL) to Seattle (SEA)?
It takes about 4 hours 36 minutes to fly from St. Louis (STL) to Seattle (SEA). -
What are the most popular airlines that fly from St. Louis (STL) to Seattle (SEA)?
Airlines with flights from St. Louis (STL) to Seattle (SEA): American Airlines, Alaska Airlines, Air Tahiti Nui, Southwest Airlines, Qatar Airways, Hawaiian Airlines, Japan Airlines and Finnair. -
How many airports in Seattle (SEA)?
There are 3 airport(s) in Seattle (SEA): King County (Boeing Field) International Airport, Lake Union Sea Plane Base and Seattle–Tacoma International Airport.
How to find a cheap flight from St. Louis to Seattle
Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Seattle. Book your flights at the right time and save more.
Be flexible with your travel dates to get the cheapest flight from St. Louis to Seattle.
Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from St. Louis to Seattle over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Tue, Jul 15, with one-way flights priced at just HK$870.
Compare cheap flight deals from St. Louis to Seattle across hundreds of airlines.
With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from St. Louis to Seattle. The cheapest airline for this route is Hawaiian Airlines.
Set up a Price Alert
By setting up a Price Alert for your journey from St. Louis to Seattle, you can easily keep an eye on ticket prices without having to check every day.
Don't miss out on cheap flight deals and promo codes from St. Louis to Seattle.
You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.
Book early or wait until the last minute.
It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.
Search for flights on the go.
For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from St. Louis to Seattle and snag some exclusive deals just for you.
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