HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$54+ Cheap flights from Washington to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STL
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to St. Louis with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Washington (USWA) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 21, 2024.

Find flight deals from Washington to St. Louis

Cheapest flights from Washington to St. Louis
Explore the most affordable flight options available from Washington to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This Delta deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/103:20 pmPDX - STL
2 stops7h 37mDelta
Wed 12/112:10 pmSTL - PDX
1 stop9h 53mDelta
Deal found 11/19$226
This Delta deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/411:05 pmSEA - STL
1 stop8h 31mDelta
Sat 12/147:20 amSTL - SEA
1 stop7h 15mDelta
Deal found 11/20$236
This FlightHub deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2412:45 pmPDX - STL
1 stop17h 28mFrontier
Thu 1/210:09 pmSTL - PDX
1 stop19h 35mFrontier
Deal found 11/19$248
This Alaska Airlines deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/136:06 pmSEA - STL
Nonstop3h 53mAlaska Airlines
Sat 12/147:00 amSTL - SEA
Nonstop4h 34mAlaska Airlines
Deal found 11/21$262
This American Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/812:15 amSEA - STL
1 stop7h 31mAmerican Airlines
Thu 12/129:39 amSTL - SEA
1 stop7h 34mAmerican Airlines
Deal found 11/20$267
This CheapOair deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/319:36 pmSEA - STL
1 stop8h 37mFrontier
Sun 1/510:09 pmSTL - SEA
1 stop17h 01mFrontier
Deal found 11/21$299
This United deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/115:10 pmSEA - STL
2 stops15h 17mUnited Airlines
Sat 12/1411:05 amSTL - SEA
1 stop10h 15mUnited Airlines
Deal found 11/20$311
This United deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/167:40 amPDX - STL
1 stop8h 16mUnited Airlines
Wed 1/16:00 amSTL - PDX
1 stop8h 22mUnited Airlines
Deal found 11/21$342
This American Airlines deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/125:35 amPDX - STL
1 stop8h 59mAmerican Airlines
Tue 12/315:21 amSTL - PDX
1 stop7h 49mAmerican Airlines
Deal found 11/21$357
This Expedia deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/66:06 pmSEA - STL
Nonstop3h 53mMultiple Airlines
Sun 12/88:34 pmSTL - SEA
1 stop14h 23mMultiple Airlines
Deal found 11/20$388
This eDestinos deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/277:19 pmPDX - STL
2 stops10h 54mMultiple Airlines
Fri 1/36:49 pmSTL - PDX
2 stops40h 57mMultiple Airlines
Deal found 11/20$405
This Southwest deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/68:25 amSEA - STL
2 stops7h 50mSouthwest
Sun 12/88:05 pmSTL - SEA
1 stop6h 20mSouthwest
Deal found 11/20$431

Find flights from Washington to St. Louis within your budget

Customize your flight search to find flights from Washington to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 2/18

7:35 am-4:33 pm

1 stop6h 58m

Lambert-St Louis

Mon 2/24

5:10 am-1:14 pm

1 stop10h 04m

$212

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 1/29

9:00 am-6:09 pm

1 stop7h 09m

Lambert-St Louis

Sat 2/1

11:30 am-9:00 pm

2 stops11h 30m

$213

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 12/10

3:20 pm-12:57 am

2 stops7h 37m

Lambert-St Louis

Wed 12/11

2:10 pm-10:03 pm

1 stop9h 53m

$226

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 12/4

11:05 pm-9:36 am

1 stop8h 31m

Lambert-St Louis

Sat 12/14

7:20 am-12:35 pm

1 stop7h 15m

$236

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 1/4

12:31 am-9:36 am

1 stop7h 05m

Lambert-St Louis

Sun 1/12

7:00 am-2:56 pm

1 stop9h 56m

$237

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sun 1/5

9:36 pm-8:13 am

1 stop8h 37m

Lambert-St Louis

Sun 1/12

12:15 pm-8:57 am

3 stops22h 42m

$240

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 12/24

12:45 pm-8:13 am

1 stop17h 28m

Lambert-St Louis

Thu 1/2

10:09 pm-3:44 pm

1 stop19h 35m

$248

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Thu 2/6

9:15 am-9:33 pm

2 stops10h 18m

Lambert-St Louis

Thu 2/13

6:00 am-2:45 pm

2 stops10h 45m

$253

SeattleSt. Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 3/7

8:26 am-2:25 pm

Nonstop3h 59m

Lambert-St Louis

Sun 3/9

7:00 am-9:35 am

Nonstop4h 35m

$257

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 2/6

6:05 am-1:53 pm

1 stop5h 48m

Lambert-St Louis

Mon 2/10

2:49 pm-9:51 am

2 stops21h 02m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 43 results
1
2
3
...
5

Best time to book a flight from Washington to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Washington to St. Louis

Get recent, data-driven insights about flights from Washington to St. Louis including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from State of Washington to St. Louis?

Currently, September is the cheapest month in which you can book a flight from State of Washington to St. Louis (average of $308). Flying from State of Washington to St. Louis in March is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WA to STL?

Find hourly flight availability from Washington to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2024.

When flying from State of Washington to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated November 21, 2024.
Peruse reviews from past customers who have flown with American Airlines, United Airlines and Delta from Washington to St. Louis to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,015 reviews

Food

7.2

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Food

7.2

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,458 reviews
Southwest
8.1
Very good
5,015 reviews

Food

7.2

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,758 reviews
Southwest
8.1
Very good
5,015 reviews

Food

7.2

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,172 reviews
Southwest
8.1
Very good
5,015 reviews

Food

7.2

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

WestJet
7.3
Good
2,810 reviews
Southwest
8.1
Very good
5,015 reviews

Food

7.2

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from Washington to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Washington?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from Washington to St. Louis.

  • How popular is this State of Washington to St. Louis flight route?

    This flight path from Washington to Lambert-St Louis was viewed by 29 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines to fly from State of Washington to St. Louis one-way?

    One-way options have recently been found by users for as low as $54 on Frontier. Other airlines that offer cheap prices include Delta from $99 and Alaska Airlines from $109 one-way.

  • What are the most popular routes from State of Washington to St. Louis?

    The most popular flight routes from State of Washington to St. Louis are Seattle/Tacoma Intl - Lambert-St Louis, Portland - Lambert-St Louis and Spokane - Lambert-St Louis.

  • What are the most reliable airlines from State of Washington to St. Louis?

    The top 3 most reliable airlines when flying from State of Washington to St. Louis are American Airlines (87%), Alaska Airlines (86%) and Air Tahiti Nui (86%).

  • What are the cheapest flights from State of Washington to St. Louis?

    The cheapest flight price from State of Washington to St. Louis is $108. On average you can expect to pay $345. The most popular route, (Seattle/Tacoma Intl - Lambert-St Louis), can usually be booked for $178.

  • Can I find deals for flights from Washington to St. Louis that include hotel bookings?

    Yes. In addition to deals on Washington to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to St. Louis.

  • Can I find deals for business class flights from Washington to St. Louis?

    Yes. Cheapflights offers flight deals from Washington to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from State of Washington to St. Louis (average of $308). Flying from State of Washington to St. Louis in March is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Reagan-National to Kansas City flights
Dulles Intl to Kansas City flights
John F Kennedy Intl to Kansas City flights
LaGuardia to Kansas City flights
Newark to Kansas City flights
Newark to St. Louis flights
Baltimore to Kansas City flights
LaGuardia to St. Louis flights
Dallas/Fort Worth to Kansas City flights
Los Angeles to Kansas City flights
Dulles Intl to St. Louis flights
Denver to Kansas City flights
Boston to Kansas City flights
John F Kennedy Intl to St. Louis flights
Atlanta to St. Louis flights
O'Hare Intl to Kansas City flights
Reagan-National to St. Louis flights
Seattle to Kansas City flights
Dallas/Fort Worth to St. Louis flights
Denver to St. Louis flights
Orlando to Kansas City flights
Minneapolis to Kansas City flights
Baltimore to St. Louis flights
Los Angeles to St. Louis flights
San Francisco to St. Louis flights
Atlanta to Kansas City flights
Minneapolis to St. Louis flights
Boston to St. Louis flights
Orlando to St. Louis flights
O'Hare Intl to St. Louis flights
Ontario to Kansas City flights
Philadelphia to Kansas City flights
Detroit to Kansas City flights
Hobby to St. Louis flights
San Francisco to Kansas City flights
Seattle to St. Louis flights
Hobby to Kansas City flights
Philadelphia to St. Louis flights
Detroit to St. Louis flights
George Bush Intcntl to St. Louis flights
Love Field to Kansas City flights
Sky Harbor Intl to Kansas City flights
Charlotte to St. Louis flights
Portland to Kansas City flights
George Bush Intcntl to Kansas City flights
Sky Harbor Intl to St. Louis flights
Tampa to Kansas City flights
Charlotte to Kansas City flights
Salt Lake City to Kansas City flights
Miami to St. Louis flights

Top 6 airlines flying from Washington to St. Louis

Discover the top 6 airlines that operate flights from Washington to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$141Average$230FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$157Average$402FlexibilityNo cancel feeOn-time71%
DeltaCheapest$206Average$419FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$215Average$459FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$216Average$501FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$289Average$468FlexibilityNo cancel feeOn-time63%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines