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$59 Find Cheap Flights from St. Louis to Washington

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Washington departing on 11/16. 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

Search hundreds of travel sites at once for deals on flights to Washington

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Washington.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Washington.

Best Washington Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Seattle
Seattle1 stop$113
Spokane
Spokane1 stop$326
Pasco
Pasco1 stop$562
Pullman
Pullman1 stop$326
Yakima
Yakima1 stop$720
Portland
Portland1 stop$192

Good to know

Low season

January

High season

August

Cheapest flight

$59
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from St. Louis to Portland

FAQs - booking Washington flights

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

    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 St. Louis to Washington.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington from St. Louis 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 St. Louis to Washington?

    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 Washington with an airline and back to St. Louis with another airline.

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

    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 Washington from St. Louis 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 cheap flights to Washington

  • Looking for a cheap flight? 25% of our users found tickets from St. Louis to the following destinations at these prices or less: Seattle $209 one-way - $396 round-trip
  • On average*, there is no price difference when choosing to fly in the morning or the evening on this flight route.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from St. Louis to Washington

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Washington. 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 St. Louis to Washington? 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
DeltaOverall score based on 8835 reviews
8.5Crew
8.2Boarding
7.9Entertainment
7.9Comfort
7.3Food
Airline reviews

Delta was great the entertainment was outdated. Screen was very small and didn’t work.

8.0 ExcellentCraig, Oct 2024ANC - SEA
Read more Delta reviews

Delta was great the entertainment was outdated. Screen was very small and didn’t work.

The seats are uncomfortable, feels like a small seat pad on plywood.

My husband is very tall and we generally fly Delta Comfort. We used our companion benefit, and our seats were coach and extremely uncomfortable........ horrid even

My seat had no padding, it was literally plywood with a plastic cover. I could not change seats on my 10 hour flight. My excitement for this trip helped me deal with the pain.

The flight was great. The crew were a little terse about the size of my bag. It fit fine.

Screen didn’t play movies, do I was pretty boated the entire flight.

It was very cold because the air conditioner was on high power, and my son got sick.

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

A regional sized plane was used for a cross country flight with no overhead bin space. I had to "pink check" my laptop and my medications. I was NOT pleased!!!!

Delta is one of the best airlines I have flown

The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.

There was no air on the plane and it was very hot.

Flight crew was amazing! I don't like that the Polaris seats are side-by-side.

Not enough room between rows and food was gross. $160 baggage charge?! Never again.

Flight was 3 1/2 hour delayed with no credit or meal vouchers

Smoothly flight, pleasant flight attendants. I wish there were better food choices.

Everything was awful Flight attendant was condescending, rude and not helpful at all. Small outdated plane. No service, uncomfortable seats. Flight attendant was really the worst. He used hand gestures to communicate instead of words and whenever he used words he was condescending.

They need to improve their boarding process. Group 1 and/or paying first class passengers shouldn't be in the middle of boarding process

late departure due to some unspecified issue with ventilating the cabin. They got it running but it was FREEZING for the whole flight. I asked for a blanket but they didn't provide one. They could not turn up the heat. it was quite miserable.

This was a 5 hour flight with no entertainment and with a snack being provided (pretzels and fruit bar), which are both high in carbs and sugar. Nuts would have been a better choice.

Overall good. Tight connection in DFW because of gate unavailability upon landing.

Airplane was cold. Flight attendants were rude. Phone charger did not work. No food available.

No food, no entertainment. But the flight was really short so maybe they had to skip drinks. I was able to board early ONLY because I am old and decrepit and they let me pre-board. I RESENT your dumping us into category 9 if we do not pay up. And when I paid for a seat I was STILL given 9. The pre-boarding helps. THIS flight was exceptionally smooth, please congratulate the pilots.

I love to flight american however my carry on had to be sent with regular luggage and it was broken. Don't appreciate that. If when I buy a ticket says I can take a carry on and a hand item there should be space for mwsy stuff and not be basically forced to send the item even if it's at no charge. A.A. needs to work on that. Everything else excellent.

Deparature was late, which is annoying but the arrival was fine and the baggage came early.

Excellent customer service at check in at Austin flight to DFW and excellent customer service from Karren in terminal B at DFW.

The free internet access did not work, so we had to purchase 2 Internet packages. Flight attendants were not proactive in checking in with first class patrons

The flight attendants were talking the entire time on the back and I couldn’t even take a nap. Super annoying

11h50m total delay. Had to switch to another flight that was still a 7h30m delay.

A very good flight. All personnel were gracious and pleasant. Good flight. No complaints.

Atlanta airport gate area floor and nearly all seats disgusting. Spirit airlines crew fantastic!!

Over 2 hour delay due to “weather” but all other flights were taking off with no issues. We felt lied to the entire time as well.

Everything was excellent and as expected. The boarding process was great but deboarding was a bit slow. No fault of the crew; it just seemed like the passengers didn’t want to leave! 😂

waited 5 hours to tell us it was cancelled even when they knew

Easy! As long as you don’t mind no frills, our flight was enjoyable and on time

No carry on available to purchase at any point, charged for water, no power to charge phone. Other discount airlines have this.

Okay for the most part but Good boarding and on time

The flight was delayed and the announcements were hard to hear, but the crew was great

Smooth enough, delay-free and safe. All went as expected,

Not acceptable having both flights delayed and not real reason for .. plus paid for luggage and getting my bag ripped out .. very disappointed.

Stop changing gates at sfo. When you are elderly going back for it’s not fun.

We understand and comply with Frontier’s bag sizes. We’ve had some problems in past while having to await other passengers who do not understand the baggage restrictions or have not prepaid and that is usually our biggest concern (others delaying us) with flying Frontier. Flying OUT of ONT, however, has always been a great experience. I’ve also noted even on delayed Frontier flights very knowledgeable pilots who manage expectations well.

There was no easy way to check in. I don't want to install an app to checkin. I will use alaska from now on because they have a web check in method that is easy.

The crew was ghetto lol I felt like I was on an inner city field trip

Horrible! The short distance flight ended up taking 5 hrs! There was a 3 hr delay for the flight to take off and there was a 70 min wait on the tarmac for some bogus reason that the pilot said the gate he was supposed to board was taken up. After a 30 min wait he said the plane that was supposed to push out of the gate called a medical emergency and 40 min later he ended up boarding another gate. For the initial 3 hr delay there was no information/alert about the gate or delay in the app or the boards up until the boarding time and even beyond! Had to walk all the way to the end of the terminal to find the frontier staff to ask what was going on. Avoid this airline at all costs! If you have carryon bags or checked bags , their prices come equivalent to the prices of more reliable airlines. They are the worst in timeliness at 60% (reported as delayed) this year (check the data) by a high margin even compared to the second worst airline. If you are ok with having a miserable flight experience with the odds close to flip of a coin, feel free to try them. If you value your time , money and flying experience, stay away.

There was nothing to like, flight delayed had to move to different departure areas, disorganized to say the leasr

Delayed for two hours due to trivial issues. No reimbursment. Also on arrival further delay due to terminal malfunction.

Our flight was canceled for no known reason. We weren’t told until we were checking in at 5:00 am. This was after our last flight with Frontier where we sat on the plane for three hours (not an exaggeration) before we took off because of a mechanical issue. We won’t be flying Frontier again.

Allowed me to chose my seat without extra charge (I purchased full-price ticket) and boarding was in group1. Didn't even serve water.

I went to the Frontier counter in San Jose at 1030am or so on Sunday 10/13/24 to see if I could get an earlier flight to San Diego in lieu of my reserved 630pm flight. One thing led to another, and I was able to obtain an open seat for about $ 56. on the earlier flight. Fine. Then the agent asked if I "was checking a bag". Not knowing that carry-ons cost extra per Frontier policy, I thought that she meant a regular checked bag. Therefore, I said no. Once I got to the gate, the same gate agent who sold me a ticket told me that I had to pay $99 for a carry-on, and that all bags were extra on Frontier. Having never flown on Frontier, I was not aware of this. Part of the issue was that she was not a native English speaker, so there was a miscommunication as to what "bag" meant. I would have preferred for her to have clearly let me know at the front counter that any bag including a carry-on cost $99. It would have had the same outcome, as I had to take my carry-on. But it got hectic at the last minute at the gate itself. The baggage policy should have mentioned "including carry-ons" when we first spoke.

Book cheap flights from St. Louis to Washington

Recent round-trip flight deals

 
These are the cheapest round-trip flights from St. Louis to Washington found on KAYAK in the last 72 hours.
11/16Sat
1 stopFrontier
16h 41mSTL-SEA
11/19Tue
1 stopFrontier
25h 35mSEA-STL
$113
11/16Sat
1 stopFrontier
16h 41mSTL-SEA
11/18Mon
1 stopFrontier
7h 13mSEA-STL
$115
12/7Sat
1 stopAmerican Airlines
9h 01mSTL-SEA
12/9Mon
1 stopAmerican Airlines
6h 55mSEA-STL
$196
11/15Fri
1 stopDelta
7h 40mSTL-SEA
11/21Thu
1 stopDelta
5h 32mSEA-STL
$206
11/21Thu
1 stopDelta
6h 44mSTL-SEA
11/28Thu
1 stopDelta
7h 45mSEA-STL
$207
11/19Tue
1 stopAmerican Airlines
7h 55mSTL-SEA
11/21Thu
1 stopAmerican Airlines
8h 57mSEA-STL
$221
11/16Sat
1 stopUnited Airlines
7h 09mSTL-SEA
11/19Tue
2 stopsUnited Airlines
10h 27mSEA-STL
$236
11/15Fri
1 stopUnited Airlines
10h 24mSTL-SEA
11/18Mon
2 stopsUnited Airlines
13h 59mSEA-STL
$247
11/14Thu
2 stopsSpirit Airlines
27h 10mSTL-SEA
11/20Wed
2 stopsSpirit Airlines
20h 58mSEA-STL
$356
11/14Thu
3 stopsSpirit Airlines
32h 43mSTL-SEA
11/20Wed
2 stopsSpirit Airlines
20h 58mSEA-STL
$390

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Washington found on KAYAK in the last 72 hours.
11/16Sat
1 stopFrontier
8h 44mSTL-PDX
$59
12/14Sat
1 stopFrontier
18h 43mSTL-SEA
$63
11/21Thu
1 stopDelta
10h 15mSTL-SEA
$98
11/7Thu
1 stopAmerican Airlines
7h 20mSTL-SEA
$108
12/8Sun
1 stopAmerican Airlines
7h 58mSTL-PDX
$113
11/19Tue
1 stopDelta
6h 44mSTL-SEA
$123
11/21Thu
2 stopsSpirit Airlines
25h 02mSTL-SEA
$126
12/3Tue
2 stopsSpirit Airlines
23h 32mSTL-SEA
$131
11/13Wed
2 stopsUnited Airlines
13h 40mSTL-SEA
$151
11/14Thu
2 stopsUnited Airlines
10h 31mSTL-SEA
$158

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Last minute flights from St. Louis to Washington

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 St. Louis to Washington that are departing in the next 10 days.
11/5Tue
multi-stopFrontier
15h 38mSTL-SEA
11/12Tue
multi-stopFrontier
11h 54mSEA-STL
$134
11/5Tue
multi-stopFrontier
15h 38mSTL-SEA
11/11Mon
multi-stopFrontier
7h 13mSEA-STL
$214
11/2Sat
multi-stopDelta
6h 37mSTL-SEA
11/9Sat
multi-stopDelta
6h 05mSEA-STL
$316
11/3Sun
multi-stopAmerican Airlines
9h 49mSTL-SEA
11/23Sat
multi-stopAmerican Airlines
7h 30mSEA-STL
$331
11/2Sat
multi-stopDelta
6h 37mSTL-SEA
11/11Mon
multi-stopDelta
6h 00mSEA-STL
$357
11/2Sat
multi-stopUnited Airlines
14h 20mSTL-SEA
11/10Sun
multi-stopUnited Airlines
9h 20mSEA-STL
$411
11/2Sat
multi-stopUnited Airlines
9h 43mSTL-SEA
11/3Sun
multi-stopUnited Airlines
9h 40mSEA-STL
$412
11/1Fri
multi-stopAmerican Airlines
8h 47mSTL-PDX
11/6Wed
multi-stopAmerican Airlines
8h 31mPDX-STL
$452
11/2Sat
multi-stopSpirit Airlines
27h 28mSTL-SEA
11/4Mon
multi-stopSpirit Airlines
24h 48mSEA-STL
$601
11/3Sun
multi-stopSpirit Airlines
21h 22mSTL-SEA
11/9Sat
multi-stopSpirit Airlines
18h 49mSEA-STL
$603

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Everything you need to know for your flight from St. Louis to Washington

Information on your arrival and departure airports