$95 Cheap Flights from St. Louis (STL) to Seattle (SEA)

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Cheap Flights from St. Louis to Seattle (STL-SEA)

Prices were available within the past 7 days and start at $95 for one-way flights and $140 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Jun 4 - Tue, Jun 11
STL
St. Louis
SEA
Seattle
$140 Roundtrip, found 11 hours ago
$140
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Tue, Jun 4 from St. Louis to Seattle, returning Tue, Jun 11, priced at $140 found 11 hours ago
Frontier Airlines
Sun, Jun 2 - Tue, Jun 11
STL
St. Louis
SEA
Seattle
$144 Roundtrip, found 7 hours ago
$144
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Sun, Jun 2 from St. Louis to Seattle, returning Tue, Jun 11, priced at $144 found 7 hours ago
Frontier Airlines
Mon, Jun 3 - Tue, Jun 11
STL
St. Louis
SEA
Seattle
$154 Roundtrip, just found
$154
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Jun 3 from St. Louis to Seattle, returning Tue, Jun 11, priced at $154 just found
Alaska Airlines
Sat, Jun 8 - Tue, Jun 11
STL
St. Louis
SEA
Seattle
$161 Roundtrip, found 7 hours ago
$161
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Sat, Jun 8 from St. Louis to Seattle, returning Tue, Jun 11, priced at $161 found 7 hours ago
Frontier Airlines
Mon, May 20 - Tue, Jun 11
STL
St. Louis
SEA
Seattle
$175 Roundtrip, found 2 days ago
$175
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, May 20 from St. Louis to Seattle, returning Tue, Jun 11, priced at $175 found 2 days ago
Frontier Airlines
Tue, Aug 20 - Tue, Sep 24
STL
St. Louis
SEA
Seattle
$179 Roundtrip, found 6 hours ago
$179
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Tue, Aug 20 from St. Louis to Seattle, returning Tue, Sep 24, priced at $179 found 6 hours ago
Frontier Airlines
Tue, Sep 3 - Tue, Sep 10
STL
St. Louis
SEA
Seattle
$180 Roundtrip, found 2 days ago
$180
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, Sep 3 from St. Louis to Seattle, returning Tue, Sep 10, priced at $180 found 2 days ago
Frontier Airlines
Sat, Sep 28 - Mon, Sep 30
STL
St. Louis
SEA
Seattle
$180 Roundtrip, found 14 hours ago
$180
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Sat, Sep 28 from St. Louis to Seattle, returning Mon, Sep 30, priced at $180 found 14 hours ago
American Airlines
Tue, May 14 - Tue, May 21
STL
St. Louis
SEA
Seattle
$181 Roundtrip, found 14 hours ago
$181
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Tue, May 14 from St. Louis to Seattle, returning Tue, May 21, priced at $181 found 14 hours ago
American Airlines
Tue, Sep 3 - Tue, Sep 10
STL
St. Louis
SEA
Seattle
$182 Roundtrip, found 2 days ago
$182
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Sep 3 from St. Louis to Seattle, returning Tue, Sep 10, priced at $182 found 2 days ago
Flights from St. Louis (STL) to Seattle (SEA)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Spirit Airlines, Sun Country Airlines, United
Roundtrip price
$140
Distance
1705 mi
Average flight time
2 hours 19 mins

St. Louis to Seattle Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from St. Louis to Seattle offer the perfect respite. Not only does exploring Seattle provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from St. Louis to Seattle may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from STL to SEA today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of Seattle are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to Seattle more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Seattle is $95 now!

Frequently asked questions

How much is a one-way flight from Lambert Field to Seattle - Tacoma Intl. Airport (SEA)?
Get set to snap up a bargain, because St. Louis flights to Seattle start from just $96. This info is based on the cheapest fare found on Expedia for this journey departing in the next three months. This airfare is for an Frontier Airlines flight, departing from Lambert Field on May 13 2024 and landing at Seattle - Tacoma Intl. Airport (SEA). The price was last updated on May 7 2024 and has not changed since.
How long does it take to fly from Lambert Field to Sea-Tac Airport?
Alaska Airlines operates a direct flight taking off from STL at 3:35PM and reaching Sea-Tac Airport at 5:54PM — a travel time of 4 hours and 19 minutes. Secure a seat, pack something to keep you busy and the time will fly by.
Is it cheaper to buy a plane ticket from Lambert Field to Seattle - Tacoma Intl. Airport (SEA) last minute?
When it comes to booking your flights, being organized pays off. While it’s possible to find a last-minute deal on a Lambert-St. Louis Intl. Airport (STL) to Sea-Tac Airport flight, prices usually don’t get cheaper as the departure date nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to lock in a domestic flight is between 28 – 35 days in advance. For international trips it’s between three and four months.
What is the cheapest airline flying from Lambert Field to SEA in the next 90 days?
The cheapest carrier flying from St. Louis to Seattle found on Expedia is Frontier Airlines, which has fares starting from $96. This price is based on airfares found on Expedia with a departure date within the next 90 days. The flight jets off from Lambert-St. Louis Intl. Airport (STL) on May 13 2024 and arrives at Sea-Tac Airport. Pricing information was updated on May 7 2024 and has not changed since.
What's the cheapest price for a flight from STL to Seattle - Tacoma Intl. Airport (SEA) next month?
You can grab a one-way flight from St. Louis to Seattle for $96. This is the cheapest ticket price for this journey departing in the next month. It’s an Frontier Airlines flight taking off from STL on May 13 2024 and arriving at SEA. The airfare was last updated on May 7 2024 and has not changed since. It was found after searching all available flights on Expedia within the next 30 days.
Can I find cheap nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Sea-Tac Airport in the next three months?
Get ready to snag a great deal because we’ve spotted a roundtrip nonstop flight with Alaska Airlines in the next 90 days for $231. The price was last updated on May 7 2024 and was found after looking at all available flights on Expedia with departure dates during the next three months. This flight from St. Louis to Seattle leaves from Lambert Field on May 21 2024 and arrives at Sea-Tac Airport. The return date of the flight is May 29 2024.To discover nonstop cheap flights heading out from Lambert-St. Louis Intl. Airport (STL) to SEA, use our filters after you’ve hit the search button. Just click “Nonstop” under “Filter by” to the left of the page to view your options. Your results will be ordered from the lowest price, so you can see the cheapest nonstop airfares first. You’re also able to compare prices for nearby dates by clicking “Flexible dates” on the same page.
What airports do you fly into for Seattle from Central United States?
Seattle - Tacoma Intl. Airport (SEA), Renton Municipal Airport (RNT) and Boeing Field Airport (BFI) are your choices when taking off from Central United States to Seattle. Around 12 mi south of the center of Seattle, Seattle - Tacoma Intl. Airport (SEA) is the city’s major hub. Consider factors such as flight arrival and departure times and the distance to your hotel before choosing your airport. Space Needle and Pike Place Market are a couple of terrific attractions to put on your itinerary when you arrive.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to Sea-Tac Airport?
The most popular departure times for journeys from Lambert Field to Sea-Tac Airport are between 3:00 PM - 4:00 PM on Alaska Airlines. Our advice is to jet out in the morning. The earlier you set off, the greater your chances of a delay-free flight with less air traffic in the skies.
Can I change the date of my flight from STL to Seattle - Tacoma Intl. Airport (SEA)?
You can make changes to your St. Louis Lambert International Airport to SEA journey through the Expedia Trips portal. But before doing so, review the rules in your itinerary to see what you can do and what fees apply for changes. Some carriers have a change fee per person, in addition to any difference in fares. However, if you booked in the last 24 hours, you may be able to cancel for free and arrange new flights. You can also find your way to our Customer Service portal for more information and to connect with our Virtual Agent.
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