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SEA - STL

Find cheap flights from Seattle to St. Louis from $100

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to St. Louis departing on 4/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sun 4/28
Sun 5/5

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.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to St. Louis.
In the last 7 days travelers have searched 46,342,885 times on KAYAK, and here is why:

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Cheap flight deals from Seattle to St. Louis

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
9:35 pm - 9:47 amSEA-STL
10h 12m1 stop
7:51 pm - 8:45 amSTL-SEA
14h 54m1 stop
Tue, Apr 16 - Tue, Apr 23
9:00 pm - 10:18 amSEA-STL
11h 18m1 stop
10:56 pm - 7:30 pmSTL-SEA
22h 34m1 stop
$165Frontier
Find Deal
Mon, Apr 15 - Thu, Apr 18
12:59 am - 10:36 amSEA-STL
7h 37m1 stop
11:07 am - 7:04 pmSTL-SEA
9h 57m1 stop
$194American Airlines
Find Deal
Fri, Apr 19 - Tue, Apr 23
5:00 am - 1:47 pmSEA-STL
6h 47m1 stop
5:08 pm - 11:05 pmSTL-SEA
7h 57m1 stop
$196American Airlines
Find Deal
Wed, May 1 - Tue, May 7
5:09 pm - 12:46 amSEA-STL
5h 37m1 stop
5:30 pm - 10:21 pmSTL-SEA
6h 51m1 stop
$216Delta
Find Deal
Thu, May 30 - Tue, Jun 4
7:24 am - 1:23 pmSEA-STL
3h 59mnonstop
2:35 pm - 5:00 pmSTL-SEA
4h 25mnonstop
$237Alaska Airlines
Find Deal
Sat, Apr 20 - Tue, Apr 23
12:35 am - 10:51 amSEA-STL
8h 16m1 stop
5:30 pm - 10:38 pmSTL-SEA
7h 08m1 stop
$257Delta
Find Deal
Tue, Apr 16 - Sat, Apr 27
9:19 pm - 1:58 pmSEA-STL
14h 39m1 stop
2:35 pm - 8:29 pmSTL-SEA
31h 54m3 stops
$275Spirit Airlines
Find Deal
Thu, Apr 11 - Tue, Apr 16
6:03 pm - 11:59 pmSEA-STL
3h 56mnonstop
7:00 am - 9:20 amSTL-SEA
4h 20mnonstop
$277Alaska Airlines
Find Deal
Thu, Apr 25 - Mon, Apr 29
9:38 am - 5:34 pmSEA-STL
29h 56m3 stops
11:33 am - 8:29 pmSTL-SEA
10h 56m1 stop
$301Spirit Airlines
Find Deal
Wed, Apr 24 - Wed, May 1

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’s the cheapest day of the week to fly from Seattle to St. Louis?

The average price of all flights from Seattle to St. Louis clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Seattle to St. Louis, look for departures on Tuesdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from St. Louis, Wednesday is the cheapest day to fly and Sunday is the most expensive.

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 September, where tickets cost $297 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $494 and $463 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 50 days before departure.

Which airlines provide the cheapest flights from Seattle to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Seattle to St. Louis found on KAYAK was with Frontier for $100. Frontier proposed a round-trip connection from $165 and American Airlines from $194.

Which airlines fly non-stop 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 is just one airline that flies from Seattle to St. Louis direct and that is Alaska Airlines. The best one-way deal found from Alaska Airlines for the route is $171.

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

Each day, there are between 3 and 4 nonstop flights that take off from Seattle and land in St. Louis, with an average flight time of 3h 57m. The most common departure time is 7:00 am and most flights take off in the morning. Each week, there are 27 flights. The most frequent day of departure is Wednesday, when 15% of all weekly flights depart. The fewest flights depart on a Friday.

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 are 3 cabin class options for the route. These are First, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Seattle to St. Louis take?

Nonstop flights from Seattle generally make it to St. Louis in 3h 54m. The flying distance between the two cities is 1,704 miles.

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

Early birds can take the earliest flight from Seattle at 7:24 am and will be landing in St. Louis at 1:23 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 6:05 pm and lands at 11:59 pm.

Good to know

Low season

January

High season

November

Cheapest flight

$100
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Seattle to St. Louis

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.

  • What is the cheapest flight from Seattle to St. Louis?

    In the last 3 days, the lowest price for a flight from Seattle to St. Louis was $100 for a one-way ticket and $164 for a round-trip.

  • Do I need a passport to fly between Seattle and St. Louis?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Seattle to St. Louis?

    On your way to St. Louis, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Lambert-St Louis.

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

    Alaska Airlines, Delta, American Airlines, and Virgin Atlantic 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 nonstop flights from Seattle to St. Louis on a daily basis.

  • Which is the best airline for flights from Seattle to St. Louis, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Seattle to St. Louis are Alaska Airlines and Delta. With an average price for the route of $367 and an overall rating of 8.1, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $302 and an overall rating of 8.0.

  • 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. Booking your flights between Seattle and STL can sometimes prove cheaper using this method.

  • 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

Top tips for finding a cheap flight from SEA to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $204 or less one-way and $310 or less round-trip.
  • 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

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, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Tuesday

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

Air Tahiti Nui, Alaska Airlines, +4 more

Wednesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Thursday

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

Air Tahiti Nui, Alaska Airlines, +4 more

Friday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Saturday

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

Air Tahiti Nui, Alaska Airlines, +4 more

Sunday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

See more direct flights

Nonstop returns

Lambert-St Louis to Seattle/Tacoma Intl

Monday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Tuesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Wednesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Thursday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Friday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Saturday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Sunday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

See more direct flights
See more direct flights

Top 5 airlines serving from Seattle to St. Louis

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 KAYAK reviews.
8.1
Alaska AirlinesOverall score based on 9127 reviews
79comfort
82boarding
74entertainment
86crew
81overall
73food
Airline reviews

Quick flight and helpful crew both on the ground and in the air. Went super easy and fast.

Read more about Alaska Airlines

Quick flight and helpful crew both on the ground and in the air. Went super easy and fast.

Smooth easy flight, good overhead storage, air in cabin was good, clean toilets

First time having to use a wheelchair after a surgery. It was great and they were so very helpful and accommodating.

The seats need to go back to being bigger. Three adults had to sit with arms crossed for the full 2.5 hour trip. Unacceptable.

So so. Need to bring back real food and INCREASE WIDTH OF SEATS!

I went Premium otherwise it would have been a long wait. On board I only asked for a cup of hot water and got lukewarm. Cabin crew have poor to no service. But great flight; it went smooth.

I really like the wifi movie option. It made the 4 hrs flight go by fast.

I think the pilots deserve most of the credit, the flight was smooth and they got us to Denver in a major winter storm when many of the airlines cancelled on other people . Alaska has my loyalty- must have better more capable pilots. Was on 720 - Seattle- Denver. The crew was alright, one of the stewards was obnoxious about applying for a credit cards she went on and on about how much she used hers- it was over the top and a turn off.

Midway through the flight the stewardess moved a man from the back of the plane to the empty seat next to me, since I was sleeping I had not voiced a preferance either way. The stewardess woke me up to say I could move to the back of the plane if I objected to the man sitting next to me, at which point I simply asked "Why?" she was speechless and quickly returned to her duties. It was a strange encounter that seemed to make no sense, even now in reflection.

Considering today's travel conditions Alaska did everything that they could do for me. I'm hoping the return flight will be as uneventful.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Boarding in Seattle is always a mess. Sat in Deltas new domestic first class cabin. Everything was great except I found the seat cushion to be fairly uncomfortable. I’m a bigger guy so take that into mind (6’2” / 300 lbs.). Crew was meh.

It was nice having the whole row to myself and was nice to get in earlier than expected

The flight experience was very good! Especially the United Club!

Overall it was good. The flight was bumpy at times, but the pilot made us aware every time. As a result, no snacks/drinks were made available. Seats were tight but that’s okay as I had a window seat.

Plane didn’t even make it off the ground. We all had to get off and walk to a different terminal (lots of confusion) to get on a different plane. Landed fairly late, connections missed.

the head jack on my seat didn't work and the power outlet didn't work for my seat

All good except paid for wifi that did not work

Left 2 hours later for delayed I had to take care a kid with special need since people don’t want to move to accommodate the rest of the family. . It wasn’t bad but that made me upset that people can be that selfish.

The crew were really great, but the 4 hour delay in small chunks was the worst.

They did get us booked on a later flight, but it made us miss our connecting flight. So, we had to stay and another state overnight with no luggage or clothes. Because they kept our luggage at airport for next flight on the next day.

The leg space between me and the seat in front of me was excellent.

That flight was smooth, and staff we courteous. it was a full flight so very tight. The boarding through security was not properly controlled. it was rushed and the scanning process for our bags, etc. was pilling up at the other end with no time to empty our belonging my personal items almost toppled over on the floor if i hadn't caught it rapidly. Was it just that time, or always like this - cant say. other than that all else was fine.

The flight was scheduled to depart DCA at 12:30 pm but was delayed twice on the ground so that we were finally scheduled to depart at around 4:00 pm. Once we boarded, it was announced that takeoff would be delayed again to fix a hydraulic problem which delayed our eventual takeoff until around 5:00 pm. Once we departed, it was a smooth flight back to ORD. We did not get any explanation about what caused the original significant delay. In my experience, this happens frequently with AA.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

Flight was good and arrived a little early. Very good.

Gossipy flight attendants talked the whole flight about bar hopping and dating.

Turbulence was bad and flight attendants gossiped about going to the bar and dating. Could have better awareness.

When we exited the plane our wheelchair wasn’t there. The Pilot and co pilot were so nice and helped us locate it. Great service.

Didn't like the 6 hour delay as it caused me to miss all of my connections. Still, I did get home safely 14 hours late but exhausted.

New ridiculous policy by american destroyed my allegiance to american. As a million miler with american, I expected it would be easy to get on an earlier flight when I got to airport earlier than expected, and save a five hour layover. WRONG. The online app would not let me switch flights, So I called, and was promised a call back in 90 minutes. HAH! The customer service desk at DCA said “we no longer have access to changing a flight on our screens. If the app couldn’t do it, I should send a letter to American, but there’s nothing else possible!”

Same basket of unhealthy prepackaged snacks (junk food) which was depleted by the time it got to my row!!

Lots of weather delays that were poorly communicated and managed. I get there are weather delays but they didn’t make it clear what was happening or comfortable on the plane

I hope to avoid flying with them in the future. First flight got cancelled then got stuck with a 13 hour layover in Denver. The process was long and frustrating to many people.

First time flying Frontier, I am not sure the Ala Carte menu of options is for me.

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

See my previous comment which is mostly about our flight from Phoenix to SFO

Terrible. Initially we were shocked by the outrageous baggage fees we needed to pay at check in for our so-called "discounted, economy flight" - we paid over $200 (!!) for one check-in and 2 carry-on bags - this felt like a real bait-and-switch" scam. Our flight from Phoenix to SFO was delayed by 4 hours. Multiple apparent causes (from needing to make space for other planes that were landing late to problem with cabins pressure system, and whatever...). After de-boarding and re-boarding we still waited at least an hour on a cramped, poorly ventilated plane before take-off. Seats were cramped, uncomfortable - did not recline at all. No water until we were flying for a while. No complimentary snacks. Upon arrival at SFO my luggage was sent upstairs to the check-in counter. The customer service person there refused to let me examine a bunch of bags that were sitting on a nearby cart because it was "behind the counter", rather made me wait until another attendant did an exhaustive and failed (?computer) search, came back and told me they were unable to locate my bag. I asked her to look on the cart, lo and behold, there was my bag just a few feet away! Missed my choir rehearsal that evening due to all of the delays. One more thing, a few days later my husband and I tested positive for Covid. Since we both are fully vaccinated, careful about masking and have never had Covid previously, we will never know, but suspect we may have acquired the infection during the prolonged wait on your poorly ventilated plane (person in the row in front of us was coughing). After registering a complaint, we received a measly $50 voucher for future flights. Needless to say we have no intention of flying with Frontier Airlines ever again.

I liked getting off the plane. Everything else was well below standards. Not even offering a bag of peanuts for free for a 4 hours flight is ridiculous.

The whole experience was bad. Didn't know no complimentary drinks or snacks. $4.39 for a soda is ridiculous even a bottle water. A carry on was $74 just crazy. I don't think I will take this airline ever again. Very bad

Delayed...attendants checked every single bag and item for sizes before boarding.

There was no wifi, there was no usb charger on the planes Frontier lowered the weight limit on suitcases from 50 to 40 pounds Frontier now charges for a seat...really? If i don't pay for a basic seat, do i stand the whole flight? Frontier now charges for the carry on, just like for the checked suitcase The bundle pricing is way over priced.

I am HIGHLY unhappy with the amount of money I spent on the flight. Paid in advance only to find the flight at a discount price a week or so before the flight. I will not fly frontier again and have bad mouthed your business since to anyone I have spoken with about flying (which has been many a people). Crew was mediocre and instead of moving me to a spot where I could gain some leg room they sat their flight attendant there. Won’t be flying frontier in the future.

Book cheap flights from Seattle to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to St. Louis found on KAYAK in the last 72 hours.
4/21Sun
1 stopFrontier
10h 58mSEA-STL
$100
5/25Sat
1 stopFrontier
14h 45mSEA-STL
$101
4/10Wed
1 stopAmerican Airlines
10h 02mSEA-STL
$107
4/9Tue
1 stopDelta
8h 16mSEA-STL
$108
5/24Fri
1 stopDelta
8h 30mSEA-STL
$113
4/11Thu
1 stopAmerican Airlines
7h 20mSEA-STL
$120
4/22Mon
nonstopAlaska Airlines
3h 56mSEA-STL
$139
4/21Sun
nonstopAlaska Airlines
3h 56mSEA-STL
$159
4/11Thu
2 stopsUnited Airlines
19h 36mSEA-STL
$345
4/11Thu
2 stopsUnited Airlines
19h 36mSEA-STL
$346

Search by stops

Search by airline

Search by price

Last minute flights from Seattle to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to St. Louis that are departing in the next 10 days.
4/1Mon
multi-stopAmerican Airlines
7h 56mSEA-STL
4/6Sat
multi-stopAmerican Airlines
10h 23mSTL-SEA
$305
3/30Sat
multi-stopAmerican Airlines
7h 49mSEA-STL
4/1Mon
multi-stopAmerican Airlines
8h 27mSTL-SEA
$306
3/30Sat
multi-stopFrontier
24h 13mSEA-STL
4/2Tue
multi-stopFrontier
24h 33mSTL-SEA
$326
3/29Fri
multi-stopAmerican Airlines
7h 56mSEA-STL
4/2Tue
multi-stopAmerican Airlines
9h 23mSTL-SEA
$345
3/29Fri
multi-stopDelta
5h 35mSEA-STL
3/31Sun
multi-stopDelta
6h 50mSTL-SEA
$348
3/29Fri
multi-stopUnited Airlines
8h 04mSEA-STL
4/2Tue
multi-stopUnited Airlines
11h 23mSTL-SEA
$353
3/29Fri
multi-stopDelta
8h 09mSEA-STL
4/1Mon
multi-stopDelta
10h 33mSTL-SEA
$373
3/30Sat
multi-stopUnited Airlines
6h 05mSEA-STL
4/2Tue
multi-stopUnited Airlines
11h 23mSTL-SEA
$409
4/2Tue
nonstopAlaska Airlines
3h 54mSEA-STL
4/15Mon
nonstopAlaska Airlines
4h 30mSTL-SEA
$607
4/1Mon
nonstopAlaska Airlines
3h 54mSEA-STL
4/6Sat
nonstopAlaska Airlines
4h 30mSTL-SEA
$657

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Seattle - St. Louis Flights

Departure:

Seattle (SEA)United States

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Seattle

Cabin classes:

$1,024
$930
$831
$256