$247 Cheap Flights from Seattle Paine Field Intl. Airport (PAE) to St. Louis (STL)

View $247 flight on Mon, Nov 17, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $247 for one-way flights and $550 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, Nov 17 - Thu, Nov 20
PAE
Seattle
STL
St. Louis
$550 Roundtrip, found 4 days ago
$550
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Nov 17 from Seattle to St. Louis, returning Thu, Nov 20, priced at $550 found 4 days ago
Alaska Airlines
Mon, Nov 17 - Thu, Nov 20
PAE
Seattle
STL
St. Louis
$558 Roundtrip, found 4 days ago
$558
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Nov 17 from Seattle to St. Louis, returning Thu, Nov 20, priced at $558 found 4 days ago
Alaska Airlines
Thu, Dec 4 - Sun, Dec 7
PAE
Seattle
STL
St. Louis
$577 Roundtrip, found 3 days ago
$577
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Dec 4 from Seattle to St. Louis, returning Sun, Dec 7, priced at $577 found 3 days ago
Alaska Airlines
Thu, Dec 4 - Sun, Dec 7
PAE
Seattle
STL
St. Louis
$587 Roundtrip, found 3 days ago
$587
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Dec 4 from Seattle to St. Louis, returning Sun, Dec 7, priced at $587 found 3 days ago
Alaska Airlines
Mon, Nov 17 - Thu, Nov 20
PAE
Seattle
STL
St. Louis
$590 Roundtrip, found 4 days ago
$590
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Nov 17 from Seattle to St. Louis, returning Thu, Nov 20, priced at $590 found 4 days ago
Alaska Airlines
Mon, Nov 17 - Thu, Nov 20
PAE
Seattle
STL
St. Louis
$590 Roundtrip, found 4 days ago
$590
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Nov 17 from Seattle to St. Louis, returning Thu, Nov 20, priced at $590 found 4 days ago
Alaska Airlines
Mon, Nov 17 - Thu, Nov 20
PAE
Seattle
STL
St. Louis
$594 Roundtrip, found 4 days ago
$594
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Nov 17 from Seattle to St. Louis, returning Thu, Nov 20, priced at $594 found 4 days ago
Alaska Airlines
Thu, Dec 4 - Sun, Dec 7
PAE
Seattle
STL
St. Louis
$596 Roundtrip, found 3 days ago
$596
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Dec 4 from Seattle to St. Louis, returning Sun, Dec 7, priced at $596 found 3 days ago
Alaska Airlines
Thu, Dec 4 - Sun, Dec 7
PAE
Seattle
STL
St. Louis
$598 Roundtrip, found 3 days ago
$598
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Dec 4 from Seattle to St. Louis, returning Sun, Dec 7, priced at $598 found 3 days ago
American Airlines
Thu, Jul 2 - Thu, Jul 9
PAE
Seattle
STL
St. Louis
$2,879 Roundtrip, found 1 day ago
$2,879
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Jul 2 from Seattle to St. Louis, returning Thu, Jul 9, priced at $2,879 found 1 day ago
Flights from Seattle Paine Field Intl. Airport (PAE) to St. Louis (STL)
Origin airport
Seattle Paine Field Intl. Airport
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines
Roundtrip price
$549
Distance
1709 mi

Seattle Paine Field Intl. Airport to St. Louis Flights

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

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 Seattle Paine Field Intl. Airport to St. Louis are during the month of November. You can find some of the cheapest flights from Seattle Paine Field Intl. Airport to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Seattle Paine Field Intl. Airport to St. Louis: 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 Seattle Paine Field Intl. Airport to St. Louis

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 Seattle Paine Field Intl. Airport to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $247 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 Seattle Paine Field Intl. Airport to St. Louis 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 Seattle Paine Field Intl. Airport to St. Louis 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.

 

Frequently asked questions

How much does a flight from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $247 or cheap return flight from $550 from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from PAE to STL is November, when demand is low. Off-peak season is often when you'll find cheap fares for travel between these airports.
Which airlines fly direct from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL)?
While Seattle Paine Field Intl. Airport (PAE) doesn't have any direct flights to Lambert-St. Louis Intl. Airport (STL), other airports have nonstop routes. Traveling from Seattle - Tacoma Intl. Airport (SEA) will get you to St. Louis without any layovers.
What is the cheapest airline that flies from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from PAE to STL, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL)?
You'll need to catch a flight with a layover if you're traveling from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from PAE to STL?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can change based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL) route, travel before 3 PM. Flights after this time 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.
Is it cheaper to buy a plane ticket from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until right before your break to book your flight from PAE to STL often results in higher prices. While you may find some last-minute discounts, there's no guarantee. Be flexible with your itinerary for a better chance of landing a bargain.
Is it cheaper to book a PAE to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a PAE to STL flight and hotel package with Expedia could result in significant savings. What's more, managing everything in one place takes the hassle out of planning your trip. Simply pick your flights and choose from our wide range of stays, then customize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Snohomish County - Paine Field Airport (PAE) to Lambert-St. Louis Intl. Airport (STL)?
In most cases, you can reschedule or cancel your PAE to STL flight. However, there may be additional fees, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want further details, visit our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.