Cheap Flight Tickets from St Louis (STL) to Seattle (SEA), Starting at $274

Good to Know: Cheapest and Fastest STL - SEA Flights

Useful information for finding best airline tickets from Lambert St Louis International to Seattle Tacoma International on your next trip.

Cheapest Round Trip Flight

$477

AA American Airlines • 1 stop • 11h 44m

Aug 22 – Aug 30

The cheapest round trip flight from St Louis to Seattle (STL-SEA-STL) is currently $477

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Cheapest Direct Flight

$274

AA American Airlines • nonstop • 7h 3m

Aug 21

The cheapest nonstop flight from St Louis to Seattle (STL-SEA) is currently $274

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Fastest Flight

7h

The fastest nonstop flight from St Louis to Seattle (STL-SEA) takes 7h

Top Airlines Flying from St Louis to Seattle

American Airlines, AA

American Airlines

Southwest Airlines-WN

Southwest Airlines

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

WestJet Airlines

WestJet Airlines

Alaska Airlines -AS

Alaska Airlines

Latest Flight Deals from St Louis (STL) to Seattle (SEA)

Compare and book low fare round-trip air tickets from St Louis to Seattle. Ideal for travelers with confirmed return itineraries.

Aug 22 - Aug 30, Economy
AA
St Louis → Seattle
11h 44m
5:42 AM - 10:46 AM • 1 stop
AA
St Louis → Seattle
12h 25m
5:00 AM - 2:45 PM • 1 stop
$477
American Airlines
Aug 22 - Aug 30, Economy
AA
St Louis → Seattle
13h 48m
8:00 AM - 2:28 PM • 1 stop
AA
St Louis → Seattle
5h 56m
6:03 PM - 11:59 PM • nonstop
$517
American Airlines
Aug 22 - Aug 30, Economy
AA
St Louis → Seattle
13h 56m
10:16 AM - 4:52 PM • 1 stop
AA
St Louis → Seattle
5h 56m
6:03 PM - 11:59 PM • nonstop
$517
American Airlines
Aug 22 - Aug 30, Economy
AA
St Louis → Seattle
15h 27m
1:25 PM - 8:52 PM • 1 stop
AA
St Louis → Seattle
5h 56m
6:03 PM - 11:59 PM • nonstop
$517
American Airlines
Aug 22 - Aug 30, Economy
AA
St Louis → Seattle
7h 7m
6:35 AM - 9:02 AM • nonstop
AA
St Louis → Seattle
12h 25m
5:00 AM - 2:45 PM • 1 stop
$518
American Airlines
Aug 22 - Aug 30, Economy
AA
St Louis → Seattle
7h 3m
3:04 PM - 5:27 PM • nonstop
AA
St Louis → Seattle
5h 56m
6:03 PM - 11:59 PM • nonstop
$772
American Airlines

Fly from St Louis to Seattle with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from St Louis to Seattle? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on St Louis to Seattle Flights

What are the airports in St Louis?
STL
What’s the most popular airline flying from STL to SEA?
The most popular airline flying from St Louis to Seattle are
Can I fly from STL to SEA non-stop?
Yes, you can fly STL to SEA non-stop on
Which airlines fly nonstop between St Louis and Seattle?
The non-stop flights between St Louis and Seattle are .
What’s the earliest departure time from STL to SEA Airport?
The earliest flight leaves STL at 5:42 am and lands in SEA - Seattle Tacoma International
What are the airports in Seattle?
SEA
Can I make changes to my St Louis to Seattle flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from STL to SEA?
Read the fare rules of the St Louis to Seattle air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from St Louis and Seattle?
operate flights between St Louis and Seattle
How long does a flight from St Louis to Seattle take?
It takes approximately 4 hour to fly non-stop from STL to SEA, which is 1709.07 miles by air.
Which airlines provide the cheapest flights from St Louis (STL) to Seattle (SEA) ?
In the past couple of days, the cheapest tickets to SEA from STL were found on AA : USD 517
Do I need a passport to fly between STL and SEA?
No
What’s the latest departure time from STL to SEA ?
The last flight leaves STL at 7:36 pm

Essential Information for Booking Flights from St Louis (STL) - AI Insights

What's the cheapest airline from stl to sea?
Frontier Airlines offers budget-friendly flights from St. Louis Lambert International Airport (STL) to Seattle Tacoma International Airport (SEA). As a one-way trip with 1 stop, you can find low fares on this route by booking in advance, ideally 58 days prior to your travel date. For business class passengers, Frontier provides premium service with priority check-in, lounge access, and flatbed seats.
What's the popular airline to fly from stl to sea?
You can fly from Lambert St Louis International Airport (stl) to Seattle Tacoma International Airport (sea) on Southwest Airlines (WN), which offers a business class option. This one-way trip has one stop and requires advance booking 58 days in advance for the best budget-friendly flights. You can find affordable airfares on their website.
What's the cheapest day of the week to fly from stl to sea?
The cheapest day to fly from St. Louis (STL) to Seattle (SEA) is Sunday. Flying on Sundays can result in budget-friendly flights, making it an ideal option for travelers looking to save on airfares.
What's the cheapest month to fly from stl to sea?
The cheapest month to fly from St. Louis (STL) to Seattle (SEA) is November, as it tends to have lower airfares compared to other months.
Which airline/airlines fly from stl to sea?
The airlines that fly from Lambert St Louis International (STL) to Seattle Tacoma International (SEA) include Southwest Airlines (WN), Alaska Airlines (AS), United Airlines (UA), American Airlines (AA), Delta Airlines (DL), WestJet Airlines (WS), and Frontier Airlines (F9).
What is the cheapest airline to fly from Lambert St Louis International Airport to Seattle Tacoma International Airport?
Frontier Airlines (F9) offers the cheapest flights from stl to sea.
How much does an airfare cost for a one-way trip from stl to sea with business class?
Business class fares on Frontier Airlines (F9) can range from $500-$700, depending on the advance booking days.
Can I book flights in advance to get the best fares on Milwaukee airfares?
Yes, booking flights at least 58 days in advance can help you find awesome deals on busco airlines and airflights.
Is it possible to find awesome deals on busco airlines and airflights?
Looking for busco airlines and airflights can be a challenge, but with the right web-based platform like fareleaders.com, you can find the cheapest fares.
What is the web-based platform fareleaders.com and how can I use it to book my weekend getaway?
Fareleaders.com is a great website to look for the cheapest fares on flights. Simply enter your travel dates and destinations to get started.
How do I look for the cheapest fares on this website when looking for flights?
To find the cheapest fares on fareleaders.com, use keywords like airfare, milwaukee, or cheapestflights in the search bar to get the best results.

St Louis (STL) to Seattle (SEA): Airport Information

Origin Airport Lambert St Louis International , St Louis, US
Destination Airport Seattle Tacoma International , Seattle, US
Distance 1709 miles

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