$81 Cheap Flights from St. Louis to Seattle

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Find The Best Dates To Fly from Lambert-St. Louis Intl. to Seattle - Tacoma Intl.

Amazing STL to SEA Flight Deals

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were $177 round trip and $81 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for STL to SEA

CarrierFlightDepart STLArrive SEATue
12/6
Wed
12/7
Thu
12/8
Fri
12/9
Sat
12/10
Sun
12/11
Mon
12/12
Stops
AS71205:15 pm07:56 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops

Best Seattle - Tacoma Intl. Flight and Hotel Packages

Seattle - Tacoma Intl. flight + hotel packages - economy flights

Radisson Hotel Seattle Airport
Grand Hyatt Seattle
Hyatt Regency Seattle
Hyatt At Olive 8
Staypineapple, Hotel FIVE, Downtown Seattle
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Frequently asked questions

Can I catch a flight from St. Louis Lambert International Airport to Seattle - Tacoma Intl. Airport (SEA) right now?
It’s always prudent to know about any quarantine requirements and travel advice reports in effect in your destination city. Ensure you go to our Covid-19 Travel Advisor for up-to-date info on catching a flight to SEA from St. Louis Lambert International Airport.
Are there direct flights from Lambert Field to SEA?
Your next amazing adventure is on the opposite side of just one flight. You can fly direct from STL to Sea-Tac Airport with multiple airlines, including Southwest Airlines and Alaska Airlines.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to SEA, please visit our Customer Service Portal.
How long is the flight from Lambert Field to SEA?
With the flight from St. Louis to Seattle taking around 6 hours and 30 minutes, there’ll be time to get things done in the air. Take advantage of your journey by bringing that book you’ve always wanted to read, seeing what in-flight entertainment is on offer or catching up on some rest. You’ll probably even find you’re able to squeeze in all three before landing.
What is the flight distance from Lambert-St. Louis Intl. Airport (STL) to Seattle - Tacoma Intl. Airport (SEA)?
Covering 1,700 mi between STL and STL calls for a glass of red and a few good movies. Sit back, get cozy and just enjoy the ride.
What airlines fly from St. Louis Lambert International Airport to SEA?
There are several airlines that advertise direct flights from Lambert Field to SEA. Southwest Airlines (WN) is one of the most reliable, offering 30 flights every month. Another possibility is Alaska Airlines (AS), which offers 30 flights every month. The more air carriers you consider, the more likely you are to pick up an amazing deal.
What airlines have practices regarding COVID-19 in place and use social distancing?
From the moment you enter the departure terminal to when you leave the arrivals terminal, if you’re flying with Alaska Airlines, Delta or Southwest Airlines you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

 

Traveling From Lambert-St. Louis Intl.
Traveling To Seattle - Tacoma Intl.
Shortest Flight Time 4 hours 41 mins
Earliest Departure Time 5:15PM CST
Latest Departure Time 5:15PM CST
Lowest Flight Price $177

Route Info

Flight path for flights from Lambert-St. Louis International Airport to Seattle-Tacoma International Airport

Distance:
1,984.00 miles

Airlines & Aircraft Used on STL to SEA Flight Routes

Airline Carrier
Aircraft
American Airlines
Embraer EMB.110 Bandeirnate
United Airlines
Embraer EMB.110 Bandeirnate

Discover our best flights from St. Louis STL to Seattle SEA. 

With 19 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

 

Find our best return flights from St. Louis STL to Seattle SEA at the right price  

Airfares to Seattle SEA from St. Louis STL currently cost between $177 and $230. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way flights from St. Louis STL to Seattle SEA 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from St. Louis STL to Seattle SEA on Travelocity starting at $81. Prices and availability subject to change. Additional terms may apply. 

 

Get to Seattle SEA from St. Louis STL quicker with direct flights. 

Get to Seattle faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to SEA from STL to take around 4 hour(s) 41 min(s).  

 

Find our cheapest airfares for flights from St. Louis STL to Seattle SEA

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to SEA from STL. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

 

Get our best airfare deals for your flight from St. Louis STL to Seattle SEA today 

If you’re flexible about when you travel, January is usually the cheapest month to fly from St. Louis STL to Seattle SEA. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

 

Book flexible airline tickets for flights to Seattle SEA from St. Louis STL 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to SEA from STL have this option.  

 

Travel with confidence when you book flights to Seattle SEA from St. Louis STL with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving. 

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.