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Reagan-National

$96+ Cheap flights from St. Louis (STL) to Reagan-National (DCA)

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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DCA
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
1 adult, Economy
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The best prices from Lambert-St Louis to Washington, D.C. Reagan-National are usually found in April or September, booked 74 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

Cheap flight deals from St. Louis to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Reagan-National (DCA). 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 February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$212
(Southwest)

One-way from

$96
(Booking.com)

Popular in

October

Cheapest in

April

Average price

$274

Good round-trip deal

$269 or less

Good one-way deal

$114 or less
Provider with most accurate pricing for Lambert-St Louis-Washington, D.C. Reagan-National flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Washington, D.C. Reagan-National flights.
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From Lambert-St Louis to Washington, D.C. Reagan-National
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One-way flight from Lambert-St Louis to Washington, D.C. Reagan-National
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Washington, D.C. Reagan-National.
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Price to beat on a one-way flight from Lambert-St Louis to Washington, D.C. Reagan-National.
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Find flight deals from St. Louis to Reagan-National

Cheapest flights from St. Louis to Reagan-National
Explore the most affordable flight options available from St. Louis to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2025.

This Southwest deal was found by Cheapflights users on 2/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/138:00 pmSTL - DCA
Nonstop1h 55mSouthwest
Mon 3/171:20 pmDCA - STL
2 stops8h 10mSouthwest
Deal found 2/21$212
This Booking.com deal was found by Cheapflights users on 2/20. 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.
Wed 3/57:04 pmSTL - DCA
1 stop20h 55mFrontier
Sun 3/91:03 pmDCA - STL
1 stop21h 13mFrontier
Deal found 2/20$220
This United Airlines deal was found by Cheapflights users on 2/21. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/165:29 pmSTL - DCA
1 stop4h 12mUnited Airlines
Tue 5/208:30 amDCA - STL
1 stop4h 49mUnited Airlines
Deal found 2/21$224
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Fri 5/2310:24 amSTL - DCA
Nonstop1h 59mAmerican Airlines
Tue 6/37:58 amDCA - STL
Nonstop2h 17mAmerican Airlines
Deal found 2/20$229
This Delta deal was found by Cheapflights users on 2/20. 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.
Sat 4/127:05 amSTL - DCA
1 stop6h 41mDelta
Wed 4/2312:20 pmDCA - STL
1 stop5h 27mDelta
Deal found 2/20$237

Find flights from St. Louis to Reagan-National within your budget

Customize your flight search to find flights from St. Louis to Reagan-National 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 February 22, 2025.

Fly from

St. Louis

Fly to

Reagan-National

Route

Depart

Return

Price

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 3/13

8:00 pm-10:55 pm

Nonstop1h 55m

Washington, D.C. Reagan-National

Mon 3/17

1:20 pm-8:30 pm

2 stops8h 10m

$212

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Wed 3/5

7:04 pm-4:59 pm

1 stop20h 55m

Washington, D.C. Reagan-National

Sun 3/9

1:03 pm-9:16 am

1 stop21h 13m

$220

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 5/16

5:29 pm-10:41 pm

1 stop4h 12m

Washington, D.C. Reagan-National

Tue 5/20

8:30 am-12:19 pm

1 stop4h 49m

$224

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 4/12

7:05 am-2:46 pm

1 stop6h 41m

Washington, D.C. Reagan-National

Thu 4/24

9:46 am-12:56 pm

1 stop4h 10m

$237

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 4/3

6:10 am-9:16 am

Nonstop2h 06m

Washington, D.C. Reagan-National

Sun 4/6

8:22 am-9:52 am

Nonstop2h 30m

$243

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 3/7

1:00 pm-1:07 pm

2 stops23h 07m

Washington, D.C. Reagan-National

Sun 3/9

8:45 am-11:56 pm

2 stops16h 11m

$485

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 4/4

6:51 pm-12:04 pm

1 stop16h 13m

$96

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 3/31

3:40 pm-10:35 pm

1 stop5h 55m

$99

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 5/10

6:45 pm-9:45 pm

Nonstop2h 00m

$109

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 5/10

5:40 pm-11:23 pm

1 stop4h 43m

$119

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

Showing 1-10 of 11 results
1
2

Compare providers for flights from St. Louis to Reagan-National

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Reagan-National in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Washington, D.C. Reagan-National Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Washington, D.C. Reagan-National Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Washington, D.C. Reagan-National Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Washington, D.C. Reagan-National Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Washington, D.C. Reagan-National Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National 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 Reagan-National

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

How far ahead should I book a flight from St. Louis to Washington, D.C. Reagan-National Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Reagan-National. Price data was last updated on February 14, 2025.

The best time to book flights from St. Louis to Washington, D.C. Reagan-National Airport is 74 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Washington, D.C. Reagan-National Airport?

Currently, February is the cheapest month in which you can book a flight from St. Louis to Washington, D.C. Reagan-National Airport (average of $278). Flying from St. Louis to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of $345). 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 DCA?

Find hourly flight availability from St. Louis to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 22, 2025.

It’s optimal to fly from St. Louis to Washington, D.C. Reagan-National Airport in the evening. By choosing this option you can save up to 17% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from St. Louis to Washington, D.C. Reagan-National Airport?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Reagan-National. Price data was last updated on February 16, 2025.

Travelers seeking maximum savings on their St. Louis to Washington, D.C. Reagan-National Airport flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from St. Louis to Washington, D.C. Reagan-National Airport

Explore weekly flight availability from St. Louis to Reagan-National. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated February 22, 2025.

The most flights from STL to DCA are scheduled on a Thursday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 2.6 in.

Temperature in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Reagan-National Airport, 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 35.6 F).

Reviews of airlines servicing Reagan-National

Get insights into the airlines that provide service to Reagan-National. 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 Reagan-National. Reviews last updated February 22, 2025.
See what other customers who have flown with Southwest, Delta and United Airlines from St. Louis to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,401 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,401 reviews
Southwest
8.1
Very good
4,401 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,212 reviews
Southwest
8.1
Very good
4,401 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,759 reviews
Southwest
8.1
Very good
4,401 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,401 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Frontier
6.0
Okay
3,354 reviews
Southwest
8.1
Very good
4,401 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Reagan-National. 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, D.C. Reagan-National?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Washington, D.C. Reagan-National. On average, Lambert-St Louis has 5 outbound flights to Washington, D.C. Reagan-National per day from 3 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • What are the cheapest airlines flying from St. Louis to Washington, D.C. Reagan-National Airport round-trip?

    According to our current data, Southwest ($212), Delta ($217), and United Airlines ($224) offers the cheapest pricing from St. Louis to Washington, D.C. Reagan-National Airport. Southwest is priced at 25% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Washington, D.C. Reagan-National Airport one-way?

    $96 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and Southwest, with prices starting from $99 and $109, respectively.

  • What are the most reliable airlines from St. Louis to Washington, D.C. Reagan-National Airport?

    Before booking your flight to Washington, D.C. Reagan-National Airport from St. Louis, check out the most reliable airlines to get you to your destination on time: Republic Airways (79%), Southwest (69%), American Airlines( 67%).

  • What are the cheapest flights from St. Louis to Washington, D.C. Reagan-National Airport?

    While on average a flight from St. Louis to Washington, D.C. Reagan-National Airport is generally $267, our data shows the cheapest flight currently is $89. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Reagan-National), you can expect to pay $185 for that flight.

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

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

  • How can I find direct flights from St. Louis to Reagan-National?

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

  • Can I find deals for business class flights from St. Louis to Reagan-National?

    Yes. Cheapflights offers flight deals from St. Louis to Reagan-National 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 Washington, D.C. Reagan-National Airport?

    Currently, February is the cheapest month in which you can book a flight from St. Louis to Washington, D.C. Reagan-National Airport (average of $278). Flying from St. Louis to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of $345). 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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Top 3 airlines flying from St. Louis to Reagan-National

Discover the top 3 airlines that operate flights from St. Louis to Reagan-National. 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 February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$179Average$278FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$200Average$301FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$222Average$315FlexibilityNo cancel feeOn-time69%
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