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$53+ Cheap flights from St. Louis (STL) to Washington

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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEA
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from St. Louis to Washington

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Washington (USWA). 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 January 21, 2025.

Round-trip from

$160
(CheapOair)

One-way from

$53
(Trip.com)
From Lambert-St Louis to Washington
Search Deals
One-way flight from Lambert-St Louis to Washington
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Find flight deals from St. Louis to Washington

Cheapest flights from St. Louis to Washington
Explore the most affordable flight options available from St. Louis to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Booking.com deal was found by Cheapflights users on 1/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/217:09 pmSTL - PDX
1 stop7h 28mFrontier
Sun 3/26:32 amPDX - STL
1 stop24h 44mFrontier
Deal found 1/20$160
This Expedia deal was found by Cheapflights users on 1/20. 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.
Wed 2/197:04 pmSTL - PDX
1 stop7h 33mMultiple Airlines
Wed 2/261:33 pmPDX - STL
1 stop8h 26mMultiple Airlines
Deal found 1/20$188
This Delta deal was found by Cheapflights users on 1/19. 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.
Fri 2/212:13 pmSTL - PDX
1 stop6h 03mDelta
Sun 2/236:05 amPDX - STL
1 stop8h 48mDelta
Deal found 1/19$227
This Delta deal was found by Cheapflights users on 1/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/106:59 pmSTL - SEA
1 stop6h 59mDelta
Mon 10/1312:40 amSEA - STL
1 stop5h 52mDelta
Deal found 1/21$247
This Trip.com deal was found by Cheapflights users on 1/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/277:00 amSTL - SEA
Nonstop4h 35mAlaska Airlines
Mon 3/36:11 pmSEA - STL
Nonstop3h 48mAlaska Airlines
Deal found 1/20$250
This United Airlines deal was found by Cheapflights users on 1/20. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/41:45 pmSTL - SEA
2 stops10h 45mUnited Airlines
Sat 2/87:00 amSEA - STL
1 stop6h 38mUnited Airlines
Deal found 1/20$252
This CheapOair deal was found by Cheapflights users on 1/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/127:09 pmSTL - SEA
1 stop18h 53mFrontier
Thu 2/132:02 pmSEA - STL
1 stop17h 14mFrontier
Deal found 1/20$256
This Jettzy deal was found by Cheapflights users on 1/20. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/277:00 amSTL - SEA
Nonstop4h 35mMultiple Airlines
Mon 3/311:23 amSEA - STL
1 stop8h 45mMultiple Airlines
Deal found 1/20$264
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/83:21 pmSTL - PDX
1 stop8h 33mAlaska Airlines
Wed 3/128:00 amPDX - STL
1 stop13h 59mAlaska Airlines
Deal found 1/20$267
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 2/271:52 pmSTL - SEA
1 stop9h 29mAmerican Airlines
Sun 3/212:25 amSEA - STL
1 stop6h 19mAmerican Airlines
Deal found 1/20$276
This Southwest deal was found by Cheapflights users on 1/20. 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.
Mon 2/103:40 pmSTL - SEA
1 stop10h 15mSouthwest
Wed 2/197:30 amSEA - STL
2 stops7h 25mSouthwest
Deal found 1/20$288
This Southwest deal was found by Cheapflights users on 1/20. 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.
Sat 5/108:30 amSTL - PDX
2 stops12h 50mSouthwest
Sat 5/172:50 pmPDX - STL
1 stop7h 00mSouthwest
Deal found 1/20$298

Find flights from St. Louis to Washington within your budget

Customize your flight search to find flights from St. Louis to Washington 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 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 2/21

7:09 pm-12:37 am

1 stop7h 28m

Portland

Sun 3/2

6:32 am-9:16 am

1 stop24h 44m

$160

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 2/19

7:04 pm-12:37 am

1 stop7h 33m

Portland

Wed 2/26

1:33 pm-11:59 pm

1 stop8h 26m

$188

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 2/21

2:13 pm-6:16 pm

1 stop6h 03m

Portland

Sun 2/23

6:05 am-4:53 pm

1 stop8h 48m

$227

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Thu 2/27

7:00 am-9:35 am

Nonstop4h 35m

Seattle/Tacoma Intl

Wed 3/19

6:04 pm-11:59 pm

Nonstop3h 55m

$247

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Tue 2/4

1:45 pm-10:30 pm

2 stops10h 45m

Seattle/Tacoma Intl

Sat 2/8

7:00 am-3:38 pm

1 stop6h 38m

$252

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Wed 2/12

7:09 pm-12:02 pm

1 stop18h 53m

Seattle/Tacoma Intl

Thu 2/13

2:02 pm-9:16 am

1 stop17h 14m

$256

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Wed 2/5

6:00 am-10:45 am

1 stop6h 45m

Seattle/Tacoma Intl

Fri 2/7

5:30 am-1:18 pm

1 stop5h 48m

$258

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Thu 2/27

7:00 am-9:35 am

Nonstop4h 35m

Seattle/Tacoma Intl

Mon 3/3

11:23 am-10:08 pm

1 stop8h 45m

$264

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 3/8

3:21 pm-9:54 pm

1 stop8h 33m

Portland

Wed 3/12

8:00 am-11:59 pm

1 stop13h 59m

$267

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Thu 2/27

1:52 pm-9:21 pm

1 stop9h 29m

Seattle/Tacoma Intl

Sun 3/2

12:25 am-8:44 am

1 stop6h 19m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 42 results
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Best time to book a flight from St. Louis to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from St. Louis 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 St. Louis to Washington

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

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to State of Washington (average of $238). Flying from St. Louis to State of Washington in July is currently the most expensive (average of $411). 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 STL to WA?

Find hourly flight availability from St. Louis to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

When flying from St. Louis to State of Washington, 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 Washington by month

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

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

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

If weather is an important factor for your trip to State of Washington, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated January 21, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines and United Airlines from St. Louis to Washington by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,982 reviews
Southwest
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Washington. 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 from for flights from St. Louis to Washington?

    For a flight from St. Louis to Washington, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

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

    The Lambert-St Louis to Washington flight path was viewed by 45 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 St. Louis to State of Washington one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $53. Delta flights start at $99 while deals on American Airlines start at $109 one-way.

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

    When deciding which route to take from St. Louis to State of Washington consider Lambert-St Louis - Seattle/Tacoma Intl, Lambert-St Louis - Portland or Lambert-St Louis - Spokane as they are the most popular.

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

    The top 3 most reliable airlines when flying from St. Louis to State of Washington are Hawaiian Airlines (85%), Qatar Airways (84%) and Japan Airlines (84%).

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

    Looking for the cheapest flight from St. Louis to State of Washington? While on average our users pay $797, our data indicates the cheapest price to be $152. The most popular route (Lambert-St Louis - Seattle/Tacoma Intl), is priced around $154.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Washington 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 St. Louis to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to State of Washington (average of $238). Flying from St. Louis to State of Washington in July is currently the most expensive (average of $411). 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.

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Alternative routes for St. Louis to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from St. Louis to Washington

Discover the top 7 airlines that operate flights from St. Louis to Washington. 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 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$196FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$125Average$171FlexibilityNo cancel feeOn-time65%
DeltaCheapest$190Average$381FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$205Average$419FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$216Average$533FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$232Average$540FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$266Average$461FlexibilityNo cancel feeOn-time63%
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