$71 Cheap Flights from St. Louis (STL) to Seattle Paine Field Intl. Airport (PAE)

View $71 flight on Mon, Dec 8, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Seattle Paine Field Intl. Airport (PAE)

Cheap Flights from St. Louis to Seattle Paine Field Intl. Airport (STL-PAE)

Prices were available within the past 7 days and start at $71 for one-way flights and $186 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Nov 6 - Thu, Nov 13
STL
St. Louis
PAE
Seattle
$186 Roundtrip, found 4 days ago
$186
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Nov 6 from St. Louis to Seattle, returning Thu, Nov 13, priced at $186 found 4 days ago
Frontier Airlines
Thu, Nov 6 - Mon, Nov 10
STL
St. Louis
PAE
Seattle
$232 Roundtrip, found 4 days ago
$232
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Nov 6 from St. Louis to Seattle, returning Mon, Nov 10, priced at $232 found 4 days ago
Frontier Airlines
Sat, Nov 8 - Mon, Nov 10
STL
St. Louis
PAE
Seattle
$236 Roundtrip, found 6 days ago
$236
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Sat, Nov 8 from St. Louis to Seattle, returning Mon, Nov 10, priced at $236 found 6 days ago
Frontier Airlines
Thu, Nov 6 - Sun, Nov 16
STL
St. Louis
PAE
Seattle
$258 Roundtrip, found 6 days ago
$258
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Thu, Nov 6 from St. Louis to Seattle, returning Sun, Nov 16, priced at $258 found 6 days ago
Frontier Airlines
Sat, Nov 8 - Sun, Nov 16
STL
St. Louis
PAE
Seattle
$308 Roundtrip, found 6 days ago
$308
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Sat, Nov 8 from St. Louis to Seattle, returning Sun, Nov 16, priced at $308 found 6 days ago
Alaska Airlines
Wed, Feb 18 - Wed, Feb 25
STL
St. Louis
PAE
Seattle
$353 Roundtrip, found 6 days ago
$353
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Feb 18 from St. Louis to Seattle, returning Wed, Feb 25, priced at $353 found 6 days ago
Frontier Airlines
Sun, Nov 9 - Sun, Nov 16
STL
St. Louis
PAE
Seattle
$355 Roundtrip, found 6 days ago
$355
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Sun, Nov 9 from St. Louis to Seattle, returning Sun, Nov 16, priced at $355 found 6 days ago
Alaska Airlines
Wed, Feb 18 - Wed, Feb 25
STL
St. Louis
PAE
Seattle
$375 Roundtrip, found 6 days ago
$375
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Feb 18 from St. Louis to Seattle, returning Wed, Feb 25, priced at $375 found 6 days ago
Alaska Airlines
Wed, Feb 18 - Wed, Feb 25
STL
St. Louis
PAE
Seattle
$376 Roundtrip, found 6 days ago
$376
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Feb 18 from St. Louis to Seattle, returning Wed, Feb 25, priced at $376 found 6 days ago
American Airlines
Wed, Jun 10 - Sun, Jun 14
STL
St. Louis
PAE
Seattle
$2,879 Roundtrip, found 1 day ago
$2,879
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Jun 10 from St. Louis to Seattle, returning Sun, Jun 14, priced at $2,879 found 1 day ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Snohomish County - Paine Field PAE. Cheapest option available. Average driving time to city center is 29 minutes. Flights from $582
PAE
Snohomish County - Paine Field
Cheapest
Average driving time to city center29 min
Flights from $582

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE) cost?
Secure a cheap one-way flight from $71 or cheap return flight from $186 from Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE)?
The cheapest month to fly from STL to PAE is November, when there's less demand. Off-peak months are typically when airlines offer better prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll take you from STL to PAE. Then, sort your results by "Price (lowest to highest)" to pick up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE)?
You'll have to hop on a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from STL to PAE?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE) route, aim to travel before 3 PM. Later departures are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Seattle from Lambert-St. Louis Intl. Airport (STL)?
Browse your flight options from Lambert-St. Louis Intl. Airport (STL) to Seattle - Tacoma Intl. Airport (SEA). This is the only airport in Seattle you can jet into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE) last-minute?
Holding off until just before your departure to book a ticket from STL to PAE generally means paying more. While it's possible to find some last-minute discounts, they're not always guaranteed. Be flexible with your travel plans for the best chance of getting a bargain.
Is it cheaper to book a STL to PAE flight and hotel package?
Opting for a STL to PAE flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Pick from our wide range of hotels and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Snohomish County - Paine Field Airport (PAE)?
If you booked your STL to PAE flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Seattle Paine Field Intl. Airport
Airlines serving
Alaska Airlines
Roundtrip price
$186
Distance
1709 mi

Book with confidence

St. Louis to Seattle Paine Field Intl. Airport Flights

The cheapest times to fly from St. Louis to Seattle Paine Field Intl. Airport

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Seattle Paine Field Intl. Airport are during the month of November. You can find some of the cheapest flights from St. Louis to Seattle Paine Field Intl. Airport with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Seattle Paine Field Intl. Airport

Sunday is one of the best days to book for cheap flights from St. Louis to Seattle Paine Field Intl. Airport: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Seattle Paine Field Intl. Airport

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Seattle Paine Field Intl. Airport in 2025. You can also book with separate airlines for your outbound and return journeys, from $71 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Seattle Paine Field Intl. Airport flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Seattle Paine Field Intl. Airport airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Seattle Paine Field Intl. Airport Flights

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*Available to One Key members.