$90 Cheap flights from Lambert-St. Louis Intl. to Seattle - Tacoma Intl. (STL to SEA)

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

Compare Flight Prices from St. Louis to Seattle

Affordable Airfare Tickets from STL to SEA Airport

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were $180 round trip and $90 one way. Prices and availability subject to change. Additional terms may apply.

Sun, Aug 31 - Sat, Sep 6
STL
St. Louis
SEA
Seattle
$180 Roundtrip, found 6 days ago
$180
Roundtrip
found 6 days ago
Select United flight, departing Sun, Aug 31 from St. Louis to Seattle, returning Sat, Sep 6, priced at $180 found 6 days ago
Fri, Aug 1 - Sun, Aug 3
STL
St. Louis
SEA
Seattle
$184 Roundtrip, found 4 hours ago
$184
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Aug 1 from St. Louis to Seattle, returning Sun, Aug 3, priced at $184 found 4 hours ago
Tue, Aug 12 - Thu, Aug 21
STL
St. Louis
SEA
Seattle
$187 Roundtrip, just found
$187
Roundtrip
just found
Select American Airlines flight, departing Tue, Aug 12 from St. Louis to Seattle, returning Thu, Aug 21, priced at $187 just found
Sat, Jul 19 - Wed, Jul 23
STL
St. Louis
SEA
Seattle
$189 Roundtrip, just found
$189
Roundtrip
just found
Select Delta flight, departing Sat, Jul 19 from St. Louis to Seattle, returning Wed, Jul 23, priced at $189 just found
Tue, Aug 12 - Thu, Aug 21
STL
St. Louis
SEA
Seattle
$189 Roundtrip, just found
$189
Roundtrip
just found
Select American Airlines flight, departing Tue, Aug 12 from St. Louis to Seattle, returning Thu, Aug 21, priced at $189 just found
Sat, Jul 19 - Tue, Jul 22
STL
St. Louis
SEA
Seattle
$190 Roundtrip, found 1 day ago
$190
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Jul 19 from St. Louis to Seattle, returning Tue, Jul 22, priced at $190 found 1 day ago
Tue, May 13 - Fri, May 23
STL
St. Louis
SEA
Seattle
$200 Roundtrip, found 5 days ago
$200
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, May 13 from St. Louis to Seattle, returning Fri, May 23, priced at $200 found 5 days ago
Fri, May 2 - Fri, May 30
STL
St. Louis
SEA
Seattle
$211 Roundtrip, found 6 days ago
$211
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Fri, May 2 from St. Louis to Seattle, returning Fri, May 30, priced at $211 found 6 days ago
Tue, Jun 3 - Tue, Jun 10
STL
St. Louis
SEA
Seattle
$213 Roundtrip, found 1 day ago
$213
Roundtrip
found 1 day ago
Select United flight, departing Tue, Jun 3 from St. Louis to Seattle, returning Tue, Jun 10, priced at $213 found 1 day ago
Tue, Aug 12 - Thu, Aug 21
STL
St. Louis
SEA
Seattle
$213 Roundtrip, just found
$213
Roundtrip
just found
Select United flight, departing Tue, Aug 12 from St. Louis to Seattle, returning Thu, Aug 21, priced at $213 just found

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

Price found within the past 48 hours. Click for updated prices.
Inn at Lake Washington By OYO I-405

Inn at Lake Washington By OYO I-405

2.5 out of 5
per person
Jun 5 - Jun 10
found 4 hours ago
Roundtrip non-stop flight included
St. Louis (STL) to Seattle (SEA)
Denny Park Hotel

Denny Park Hotel

4 out of 5
Save 100% on your flight
per person
Jun 5 - Jun 10
found 4 hours ago
Roundtrip non-stop flight included
St. Louis (STL) to Seattle (SEA)
Lotte Hotel Seattle

Lotte Hotel Seattle

5 out of 5
Save 100% on your flight
per person
Jun 5 - Jun 10
found 4 hours ago
Roundtrip non-stop flight included
St. Louis (STL) to Seattle (SEA)
citizenM Seattle Pioneer Square

citizenM Seattle Pioneer Square

4 out of 5
Save 100% on your flight
per person
Jun 5 - Jun 10
found 4 hours ago
Roundtrip non-stop flight included
St. Louis (STL) to Seattle (SEA)
Motel 6 Kirkland, WA - North Kirkland

Motel 6 Kirkland, WA - North Kirkland

2 out of 5
per person
Jun 5 - Jun 10
found 4 hours ago
Roundtrip non-stop flight included
St. Louis (STL) to Seattle (SEA)
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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.

Flight information from St. Louis to Seattle

 

Traveling From
Lambert-St. Louis Intl.
Traveling To
Seattle - Tacoma Intl.
Shortest Flight Time
 hours mins
Earliest Departure Time
Latest Departure Time
Lowest Flight Price
$180

Route Info

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


Origin:
STL - Lambert-St. Louis International Airport
Destination:
SEA - 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 20 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 $180 and $213. 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 $90. 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 hour(s) 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, August 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.