
Book Cheap Alaska Airlines flight from St. Louis (STL) to Seattle (SEA) from CA $151
Find The Best Day to Book a Cheap Alaska Airlines Flights From St. Louis to Seattle
Cheapest Alaska Airlines Flights from St. Louis (STL) to Seattle (SEA)
The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were CA $287 round trip and CA $151 one way. Prices and availability subject to change. Additional terms may apply.
Frequently asked questions
Grab a great Alaska Airlines flight from STL to SEA
To find a great deal on Alaska Airlines flights with Travelocity, simply enter your origin and destination airports, pick your travel dates, and hit search. From here, you can sort by price, flight duration, and arrival/departure time. You can also filter to find nonstop flights.
Flying Alaska Airlines St. Louis to Seattle gives you fights to choose from. With that direct flight time of , you’ll be touching down before you know it.
Find cheap flights with Alaska Airlines between St. Louis and Seattle
Alaska Airlines has a range of great fares on stacks of flights, and to find the most affordable for you, there are a few tricks you can try. Booking in advance, for example, is a great way to grab a fantastic deal. Also, choose the cheapest month, if you can. One-way flights from St. Louis to Seattle with Alaska Airlines are April.
The more flexible you are, the more affordable flights you’re likely to find. Consider one-way flights and connecting flights, as well as standard roundtrip and direct options. Even if you’re flying today, cheap last-minute flights are easy to find by entering your travel dates and hitting search.
Reasons to book your Alaska Airlines flights with Travelocity
Travelocity makes it easy to book a seat, anywhere in the world. The vast inventory, fast search, and advanced filters put some of the best deals on the planet in one place. Whether you’re traveling on business, with friends, family, or on your own, take your pick from some fantastic options. And with free cancellation and pay later options, you can travel more and worry less.
Airport code | Country | Airport name | Number of flights |
|---|---|---|---|
| SEA | USA | Seattle - Tacoma Intl. | 115 |
| ORD | USA | O'Hare Intl. | 44 |
| LAX | USA | Los Angeles Intl. | 24 |
| PDX | USA | Portland Intl. | 23 |
| ANC | USA | Ted Stevens Anchorage Intl. | 22 |
| SFO | USA | San Francisco Intl. | 21 |
| SAN | USA | San Diego Intl. | 18 |
| JNU | USA | Juneau Intl. | 10 |
| SJC | USA | Norman Y. Mineta San Jose Intl. | 10 |
| GEG | USA | Spokane Intl. | 7 |
Travelers ❤️ these 🏨 after their flight to Seattle

DoubleTree by Hilton Seattle Airport
The room was very nice very clean no complaints even got to see a family of raccoons out on the balcony
Reviewed on Feb 2, 2026

Coast Gateway Hotel
The room was fine. Great restaurant next door, and very close to the airport with free shuttle pick up every 20 minutes.
Reviewed on Feb 3, 2026

Country Inn & Suites by Radisson, Seattle-Tacoma International Airport, WA
Good location to the airport. Clean room and attentive staff. Breakfast on site.
Reviewed on Jan 29, 2026
Want more than a(n) Alaska Airlines Flight from St. Louis to Seattle?
Popular Alaska Airlines Flight Routes from STL
Domestic
- Vancouver to Miami (YVR - MIA)
- Calgary to Orlando (YYC - MCO)
- Edmonton to Cancun (YEG - CUN)
- Calgary to Los Angeles (YYC - LAX)
- Vancouver to Kahului (YVR - OGG)
- Vancouver to Phoenix (YVR - PHX)
- Calgary to Liberia (YYC - LIR)
- Calgary to Las Vegas (YYC - LAS)
- Vancouver to Los Angeles (YVR - LAX)
- Vancouver to San José del Cabo (YVR - SJD)
International
- Calgary to Liberia (YYC - LIR)
- Vancouver to San Francisco (YVR - SFO)
- Vancouver to Miami (YVR - MIA)
- Vancouver to Los Angeles (YVR - LAX)
- Vancouver to Cancun (YVR - CUN)
- Vancouver to Fort Lauderdale (YVR - FLL)
- Calgary to Cancun (YYC - CUN)
- Calgary to Puerto Vallarta (YYC - PVR)
- Calgary to Cancun (YYC - CUN)
- Vancouver to Cancun (YVR - CUN)
Most Popular
- Vancouver to Palm Springs (YVR - PSP)
- Vancouver to Las Vegas (YVR - LAS)
- Detroit to Dallas (DTW - DFW)
- WestJet Vancouver (YVR) to Las Vegas (LAS) flights
- Porter Airlines Toronto (YTZ) to Myrtle Beach (MYR) flights
- Montreal to Fort Lauderdale (YUL - FLL)
- Buffalo to Dallas (BUF - DFW)
- Vancouver to Fort Lauderdale (YVR - FLL)
- Delta Detroit (DTW) to Las Vegas (LAS) flights
- Buffalo to Myrtle Beach (BUF - MYR)
- Detroit to Fort Lauderdale (DTW - FLL)
- Fort Lauderdale to Toronto (FLL - YYZ)
- Vancouver to San Diego (YVR - SAN)
- Detroit to Myrtle Beach (DTW - MYR)
- Toronto to Seattle (YYZ - SEA)
- Toronto to Dallas (YYZ - DFW)
- Air Canada Toronto (YYZ) to Myrtle Beach (MYR) flights
- Spirit Airlines Niagara Falls (IAG) to Myrtle Beach (MYR) flights
- JetBlue Airways Buffalo (BUF) to Fort Lauderdale (FLL) flights
- Porter Airlines Toronto (YTZ) to Philadelphia (PHL) flights
- Air Canada Toronto (YYZ) to Las Vegas (LAS) flights
- WestJet Edmonton (YEG) to Las Vegas (LAS) flights
- Toronto to New York (YYZ - NYC)
- Toronto to Philadelphia (YYZ - PHL)
- St. Louis to Gulf Shores (STL - GUF)
- Air Canada Toronto (YYZ) to Fort Lauderdale (FLL) flights
- Toronto to Las Vegas (YYZ - LAS)
- Swoop Abbotsford (YXX) to Las Vegas (LAS) flights
- WestJet Toronto (YYZ) to Columbia (COU) flights
- Seattle to Delhi (SEA - DEL)
