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SEA - STL

Find cheap flights from Seattle to St. Louis

1 adult
0 bags
Sat 15/6
Sat 22/6

Search hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to St. Louis, as well as popular online travel agencies
In the last 7 days, travellers have searched 42,211,976 times on KAYAK, and here is why:

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

 
These are the cheapest deals for flights from Seattle to St. Louis currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Seattle to St. Louis

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Seattle to St. Louis.

Recent one-way flight deals from Seattle to St. Louis

Only flying one-way? Below are some of the best one-way flight deals from Seattle to St. Louis found on KAYAK recently.

Recent last-minute flight deals from Seattle to St. Louis

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Seattle to St. Louis.

Recent direct flight deals from Seattle to St. Louis

The latest deals for direct flights from Seattle to St. Louis so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Seattle to St. Louis

Find recent round-trip train or bus tickets from Seattle to St. Louis.

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
SEA-STL
3h 50mdirect
STL-SEA
4h 25mdirect
American Airlines
Find Deal
SEA-STL
4h 01mdirect
STL-SEA
4h 14mdirect
Qatar Airways
Find Deal
SEA-STL
3h 50mdirect
STL-SEA
4h 25mdirect
Alaska Airlines
Find Deal
SEA-STL
3h 56mdirect
STL-SEA
4h 26mdirect
Japan Airlines
Find Deal
SEA-STL
3h 50mdirect
STL-SEA
4h 15mdirect
Southwest
Find Deal
SEA-STL
4h 01mdirect
STL-SEA
4h 25mdirect
Finnair
Find Deal
SEA-STL
3h 50mdirect
STL-SEA
4h 25mdirect
Air Tahiti Nui
Find Deal
SEA-STL
3h 50mdirect
American Airlines
Find Deal
SEA-STL
4h 01mdirect
Qatar Airways
Find Deal
SEA-STL
3h 50mdirect
Alaska Airlines
Find Deal
SEA-STL
3h 56mdirect
Japan Airlines
Find Deal
SEA-STL
3h 50mdirect
Southwest
Find Deal
SEA-STL
4h 01mdirect
Finnair
Find Deal
SEA-STL
3h 50mdirect
Air Tahiti Nui
Find Deal
SEA-STL
3h 56mdirect
Singapore Airlines
Find Deal

Flights from Seattle to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from Seattle to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Seattle to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Seattle to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Seattle to St. Louis is January, where tickets cost C$ 323 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is C$ 598 and C$ 583 respectively.

How far in advance should I book a flight from Seattle to St. Louis?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Seattle to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Seattle to St. Louis, you should book around 2 days before departure. For the absolute cheapest price, our data suggests you should book 71 days before departure.

Which airlines fly direct between Seattle and St. Louis?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Seattle to St. Louis.
There are 2 airlines that fly direct from Seattle to St. Louis. They are Alaska Airlines and Southwest. The cheapest airline for this route is Alaska Airlines, with the best deal found costing C$ 269. On average, the best prices for this route can be found at Alaska Airlines.

How many flights are there between Seattle and St. Louis per day?

Each day, there are between 8 and 9 nonstop flights that take off from Seattle and land in St. Louis, with an average flight time of 3h 52m. The most common departure time is 12:00 p.m. and most flights take off in the morning. Each week, there are 61 flights. The most frequent day of departure is Thursday, when 15% of all weekly flights depart. The fewest flights depart on a Saturday.

Which cabin class options are there for flights between Seattle and St. Louis?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

What’s the earliest departure time from Seattle to St. Louis?

Early birds can take the earliest flight from Seattle at 7:30 am and will be landing in St. Louis at 1:20 pm.

What’s the latest departure time from Seattle to St. Louis?

If you prefer to fly at night, the latest flight from Seattle to St. Louis jets off at 6:10 pm and lands at 11:59 pm.

Good to know

Low season

January

High season

April
Best time to beat the crowds (31% less expensive on average)
Most popular time to fly and prices are also 0% lower on average.

When to book flights from Seattle to St. Louis

Are your dates flexible? Find out the best times to travel from Seattle to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to St. Louis

  • Where can I find car rentals from St. Louis Lambert International Airport (STL)?

    The use of car rentals is one of the most efficient methods of connecting travelers from STL Airport to the city center and St. Louis downtown. Car Rental Town-Saint Louis Airport is one car rental agency that provides affordable services to travelers arriving at STL Airport in St. Louis. This agency is located in STL Airport, along terminal 1.

  • How can I connect to St. Louis downtown from STL Airport?

    The use of the Metrolink bus system is the most efficient and inexpensive method of connecting travelers to St. Louis downtown from STL Airport. Travelers connecting to St. Louis downtown from STL Airport pay approximately $4.00 on Metrolink buses. Apart from buses, travelers can also use rental cars to connect to St. Louis downtown from STL Airport. Consider renting a car at Car Rental Town-Saint Louis Airport Agency.

  • Are there kid-friendly amenities on flights from Seattle to St. Louis?

    The availability of on-demand kid-friendly entertainment options on American Airlines makes it the most preferred airline for travelers flying from Seattle to St. Louis in the company of their kids. This airline offers free in-flight WI-FI services, which allows your kids to stream their favorite video games, TV shows, and music albums, eliminating boredom.

  • Which hotel can I stay in from STL Airport in St. Louis?

    There are several hotels where travelers landing at STL Airport can stay. One hotel that is easily accessible to travelers from STL Airport is the Quality Inn Airport. This hotel is located along Natural Bridge Rd, St. Louis, and it provides free airport shuttle services to customers.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to St. Louis?

    Alaska Airlines, Delta, Virgin Atlantic, and American Airlines offer inflight Wi-Fi service on the Seattle to St. Louis flight route.

  • Which aircraft models fly most regularly from Seattle to St. Louis?

    The Boeing 737 is the aircraft model that flies most regularly on the Seattle to St. Louis flight route.

  • Which airline alliances offer flights from Seattle to St. Louis?

    oneworld, and Star Alliance are the airline alliances operating flights between Seattle and St. Louis, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from Seattle to St. Louis?

    There are direct flights from Seattle to St. Louis on a daily basis.

  • How does KAYAK find such low prices on flights from Seattle to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Seattle to St. Louis

  • Despite having other airports that serve similar flights from Seattle to St. Louis, like Renton Municipal Airport and King County International Airport, travelers from Seattle prefer using Seattle-Tacoma International Airport (SEA) as their departure airport to St. Louis. This airport is widely preferred due to the availability of several cheaper means of transport that connect travelers from the city center and Seattle downtown to the airport, such as taxis, buses, and airport shuttles.
  • Travelers who plan to catch the earliest flight that departs SEA Airport for St. Louis should consider spending their night in a nearby hotel. One hotel that guarantees travelers quick access to SEA Airport is the DoubleTree by Hilton Hotel Seattle Airport. This hotel is located along International Blvd, Seattle, a 4min drive from SEA Airport and offers airport shuttle services.
  • Are you planning to travel from Seattle to St. Louis in the company of a person with reduced mobility? Worry no more. SEA Airport offers curb-to-aircraft services to persons with reduced mobility. All airlines serving flights from SEA Airport to St. Louis, like American Airlines, Qatar Airways, and Southwest, have deployed personnel across the airport to assist persons with reduced mobility.
  • Travelers who wish to shop before taking a flight from Seattle to St. Louis shouldn’t get worried. SeaTac Shopping Mall is one shopping mall that offers quality and affordable products to travelers flying from SEA Airport in Seattle. This shopping mall is located along International Blvd, SeaTac, just a walking distance from SEA Airport.
  • If you plan to take care of your stomach and have some rest as you wait for your flight from SEA Airport to St. Louis, consider visiting Dish D'lish Restaurant. Dish D'lish is one restaurant that offers the best food at an affordable price to travelers at SEA Airport as they wait for their flights to St. Louis.
See more tips

Flights from Seattle to St. Louis: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Seattle to St. Louis 
Learn how KAYAK collects reviews and tips from users.
NashFlew with Alaska AirlinesDec. 2023
In long flights (Over 3 hours) you should provide more snacks and drinks.
Verified travelerFlew with Alaska AirlinesFeb. 2024
Be sure to measure your wheels for carry on my luggage was the correct size but the wheels made it over so had to check my bag wasn't happy about that since you have to pay for checked should at least get one free.

Prefer to fly non-stop from Seattle to St. Louis?

Find which airlines fly direct from Seattle/Tacoma Intl to Lambert-St Louis, which days they fly and book direct flights.

Nonstop departures

Seattle/Tacoma Intl to Lambert-St Louis

Monday

Air Tahiti Nui,Alaska Airlines,American Airlines, +3 more

Air Tahiti Nui,Alaska Airlines, +4 more

Tuesday

Air Tahiti Nui,Alaska Airlines,American Airlines, +5 more

Air Tahiti Nui,Alaska Airlines, +6 more

Wednesday

Air Tahiti Nui,Alaska Airlines,American Airlines, +3 more

Air Tahiti Nui,Alaska Airlines, +4 more

Thursday

Air Tahiti Nui,Alaska Airlines,American Airlines, +5 more

Air Tahiti Nui,Alaska Airlines, +6 more

Friday

Air Tahiti Nui,Alaska Airlines,American Airlines, +3 more

Air Tahiti Nui,Alaska Airlines, +4 more

Saturday

Air Tahiti Nui,Alaska Airlines,American Airlines, +5 more

Air Tahiti Nui,Alaska Airlines, +6 more

Sunday

Air Tahiti Nui,Alaska Airlines,American Airlines, +4 more

Air Tahiti Nui,Alaska Airlines, +5 more

See more nonstop flights

Nonstop returns

Lambert-St Louis to Seattle/Tacoma Intl

Monday

Air Tahiti Nui,Alaska Airlines,American Airlines, +3 more

Air Tahiti Nui,Alaska Airlines, +4 more

Tuesday

Air Tahiti Nui,Alaska Airlines,American Airlines, +4 more

Air Tahiti Nui,Alaska Airlines, +5 more

Wednesday

Air Tahiti Nui,Alaska Airlines,American Airlines, +3 more

Air Tahiti Nui,Alaska Airlines, +4 more

Thursday

Air Tahiti Nui,Alaska Airlines,American Airlines, +4 more

Air Tahiti Nui,Alaska Airlines, +5 more

Friday

Air Tahiti Nui,Alaska Airlines,American Airlines, +3 more

Air Tahiti Nui,Alaska Airlines, +4 more

Saturday

Air Tahiti Nui,Alaska Airlines,American Airlines, +4 more

Air Tahiti Nui,Alaska Airlines, +5 more

Sunday

Air Tahiti Nui,Alaska Airlines,American Airlines, +3 more

Air Tahiti Nui,Alaska Airlines, +4 more

See more nonstop flights
See more nonstop flights

Top airline flying from Seattle to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Seattle to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9157 reviews
7.3Entertainment
8.2Boarding
7.3Food
8.6Crew
7.9Comfort
Airline reviews

Why do you ask about food when only a snack is served? Actual food needs to be bought.

8.0 ExcellentAnonymous, May 2024SEA - PHL
Read more about Alaska Airlines reviews

Why do you ask about food when only a snack is served? Actual food needs to be bought.

There was an older male crew member that was very rude to me when doing the last checks before pulling back from the terminal. There is a polite way to tell someone to put their bag under the seat. It was Mother’s Day and my mom has recently passed so it was a tough morning for me in general. There was no need to make for the snide remark “ I don’t know how many times we have said this already” as you walked away. I had held it together all morning and this interaction brought me to tears. love Alaska Airlines and this is the first time I’ve had a negative experience.

Alway a a breeze! And great mountain views on left side of plane during entire flight!

another delayed flight. no one at the desk kept us updated. we found out by an email as the desk was not even staffed up to expected takes off

They canceled my flight going back to SF after I was at the airport. Wanted me to take a flight 14 hours later. Not a happy camper.

Service was excellent. Staff at check in cleared hurdles for me so I could travel with my service animal.

Flight cancelled an hour before takeoff due to "unscheduled maintenance". New flight makes me have to wait for 5 hours in the airport, at a gate totally on the other side of where I'm at, requiring me to take a tram to get from the N terminal, to the C terminal. After waiting for 5 hours I'm informed my new flight is no longer at the gate I'm at, but instead is back in the N terminal where I was previously.

Delayed an hour and sat without updates. Ended up an hour late to destination

The flight was decent again if there was a place that you could put crying children that would be great. Or maybe make a rule against allowing infants on the plane.

Everything was fine -- on time, clear, clean. I don't want to pay extra for in-flight wi-fi

Book cheap flights from Seattle to St. Louis

One-way flight deals

directAmerican Airlines
3h 50mSEA-STL
directQatar Airways
4h 01mSEA-STL
directAlaska Airlines
3h 50mSEA-STL
directJapan Airlines
3h 56mSEA-STL
directSouthwest
3h 50mSEA-STL
directFinnair
4h 01mSEA-STL
directAir Tahiti Nui
3h 50mSEA-STL
directSingapore Airlines
3h 56mSEA-STL

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Seattle - St. Louis Flights

Departure:

Seattle (undefined)United States

Destination:

St. Louis (STL)United States

Cabin classes:

C$ 605

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