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St. Louis Lambert International Airport to Ronald Reagan Washington National Airport flight
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St. Louis Lambert International Airport to Ronald Reagan Washington National Airport Flights Info

Cheapest one-way
QAR 324
Frontier Airlines Frontier Airlines 16h 31m · 1 stop Thu, Nov 19
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Cheapest return
QAR 729
Frontier Airlines Frontier Airlines 9h 10m · 2 stops Thu, Nov 19 - Mon, Nov 23
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Recommended airlines
Frontier Airlines Frontier AirlinesCheapest· From QAR 324 American Airlines American AirlinesMost booked

Explore the cheapest one-way and round-trip flights from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport over the next 90 days, with one-way fares from QAR 324 and round-trip from QAR 729. Based on Trip.com's latest 7-day flight data.

    • Cheapest
      STL 18:34
      16h 31m
      1 stop
      DCA 12:05
      St. Louis - Washington D.C. | Thu, Nov 19 | Frontier Airlines
      QAR 324 QAR 1,259
      74% off
      74% off
      QAR 1,259 QAR 324
    • STL 18:34
      16h 31m
      1 stop
      DCA 12:05
      St. Louis - Washington D.C. | Sat, Nov 21 | Frontier Airlines
      QAR 341 QAR 1,259
      73% off
      73% off
      QAR 1,259 QAR 341
    • STL 16:21
      19h 4m
      1 stop
      DCA 12:25
      St. Louis - Washington D.C. | Sat, Dec 26 | Frontier Airlines
      QAR 380 QAR 1,259
      70% off
      70% off
      QAR 1,259 QAR 380
    • STL 19:54
      20h 1m
      1 stop
      DCA 16:55
      St. Louis - Washington D.C. | Thu, Dec 17 | Frontier Airlines
      QAR 382
      70% off
      QAR 1,259 QAR 382
    • STL 19:54
      15h 31m
      1 stop
      DCA 12:25
      St. Louis - Washington D.C. | Sat, Dec 19 | Frontier Airlines
      QAR 382
      70% off
      QAR 1,259 QAR 382
    • STL 19:58
      15h 50m
      1 stop
      DCA 12:48
      St. Louis - Washington D.C. | Sat, Dec 5 | Frontier Airlines
      QAR 403
      68% off
      QAR 1,259 QAR 403
    • STL 19:54
      16h 1m
      1 stop
      DCA 12:55
      St. Louis - Washington D.C. | Tue, Dec 8 | Frontier Airlines
      QAR 403
      68% off
      QAR 1,259 QAR 403
    • STL 19:54
      16h 1m
      1 stop
      DCA 12:55
      St. Louis - Washington D.C. | Sat, Dec 12 | Frontier Airlines
      QAR 403
      68% off
      QAR 1,259 QAR 403
    • STL 15:47
      2h 4m
      Direct
      DCA 18:51
      St. Louis - Washington D.C. | Fri, Jan 29 | American Airlines
      QAR 430
      65% off
      QAR 1,213 QAR 430
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Mon, Nov 16 | Normal Airline
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    • STL 11:40
      9h 10m
      1 stop
      DCA 21:50
      St. Louis - Washington D.C. | Thu, Nov 19 | Frontier Airlines
      IAD 06:50
      11h 50m
      1 stop
      STL 17:40
      Washington D.C. - St. Louis | Mon, Nov 23 | Frontier Airlines
      QAR 729 QAR 934
      22% off
      22% off
      QAR 934 QAR 729
    • STL 19:58
      15h 50m
      1 stop
      DCA 12:48
      St. Louis - Washington D.C. | Wed, Dec 2 | Frontier Airlines
      DCA 13:33
      22h 24m
      1 stop
      STL 10:57
      Washington D.C. - St. Louis | Fri, Dec 4 | Frontier Airlines
      QAR 751 QAR 934
      20% off
      20% off
      QAR 934 QAR 751
    • STL 18:20
      17h 15m
      1 stop
      DCA 12:35
      St. Louis - Washington D.C. | Wed, Jan 6 | Frontier Airlines
      DCA 07:25
      27h 55m
      1 stop
      STL 10:20
      Washington D.C. - St. Louis | Fri, Jan 8 | Frontier Airlines
      QAR 753 QAR 934
      19% off
      19% off
      QAR 934 QAR 753
    • STL 19:54
      20h 1m
      1 stop
      DCA 16:55
      St. Louis - Washington D.C. | Mon, Dec 7 | Frontier Airlines
      DCA 07:00
      29h 4m
      1 stop
      STL 11:04
      Washington D.C. - St. Louis | Tue, Dec 15 | Frontier Airlines
      QAR 753
      19% off
      QAR 934 QAR 753
    • STL 19:54
      20h 1m
      1 stop
      DCA 16:55
      St. Louis - Washington D.C. | Mon, Dec 14 | Frontier Airlines
      IAD 05:30
      6h 23m
      1 stop
      STL 10:53
      Washington D.C. - St. Louis | Mon, Dec 21 | Frontier Airlines
      QAR 760
      19% off
      QAR 934 QAR 760
    • STL 15:04
      20h 55m
      1 stop
      DCA 12:59
      St. Louis - Washington D.C. | Mon, Nov 23 | Frontier Airlines
      IAD 21:35
      27h 24m
      1 stop
      STL 23:59
      Washington D.C. - St. Louis | Wed, Nov 25 | Frontier Airlines
      QAR 776
      17% off
      QAR 934 QAR 776
    • STL 16:18
      18h 51m
      1 stop
      DCA 12:09
      St. Louis - Washington D.C. | Wed, Nov 18 | Frontier Airlines
      IAD 21:35
      27h 24m
      1 stop
      STL 23:59
      Washington D.C. - St. Louis | Wed, Nov 25 | Frontier Airlines
      QAR 789
      16% off
      QAR 934 QAR 789
    • STL 15:04
      20h 55m
      1 stop
      DCA 12:59
      St. Louis - Washington D.C. | Sat, Nov 21 | Frontier Airlines
      DCA 13:54
      22h 9m
      1 stop
      STL 11:03
      Washington D.C. - St. Louis | Thu, Nov 26 | Frontier Airlines
      QAR 792
      15% off
      QAR 934 QAR 792
    • STL 19:54
      16h 1m
      1 stop
      DCA 12:55
      St. Louis - Washington D.C. | Wed, Dec 9 | Frontier Airlines
      IAD 20:26
      28h 46m
      1 stop
      STL 00:12
      Washington D.C. - St. Louis | Mon, Dec 14 | Frontier Airlines
      QAR 809
      13% off
      QAR 934 QAR 809
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Mon, Nov 16 | Normal Airline
      WAS 15:00
      6h
      Direct
      STL 16:00
      Washington D.C. - St. Louis | Wed, Nov 18 | Normal Airline
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    • Cheapest nonstop
      STL 15:47
      2h 4m
      Direct
      DCA 18:51
      St. Louis - Washington D.C. | Fri, Jan 29 | American Airlines
      QAR 430 QAR 1,213
      65% off
      65% off
      QAR 1,213 QAR 430
    • STL 15:47
      2h 4m
      Direct
      DCA 18:51
      St. Louis - Washington D.C. | Wed, Jan 13 | American Airlines
      QAR 430 QAR 1,213
      65% off
      65% off
      QAR 1,213 QAR 430
    • STL 07:03
      2h 10m
      Direct
      DCA 10:13
      St. Louis - Washington D.C. | Wed, Dec 23 | American Airlines
      QAR 491 QAR 1,213
      60% off
      60% off
      QAR 1,213 QAR 491
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Mon, Nov 16 | Normal Airline
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    • Cheapest nonstop
      STL 15:47
      2h 4m
      Direct
      DCA 18:51
      St. Louis - Washington D.C. | Fri, Jan 29 | American Airlines
      QAR 430 QAR 2,319
      81% off
      81% off
      QAR 2,319 QAR 430
    • STL 15:47
      2h 4m
      Direct
      DCA 18:51
      St. Louis - Washington D.C. | Wed, Jan 13 | American Airlines
      QAR 430 QAR 2,319
      81% off
      81% off
      QAR 2,319 QAR 430
    • STL 07:03
      2h 10m
      Direct
      DCA 10:13
      St. Louis - Washington D.C. | Wed, Dec 23 | American Airlines
      QAR 491 QAR 2,319
      79% off
      79% off
      QAR 2,319 QAR 491
    • STL 10:06
      3h 53m
      1 stop
      DCA 14:59
      St. Louis - Washington D.C. | Tue, Dec 8 | Delta Air Lines
      QAR 498
      79% off
      QAR 2,319 QAR 498
    • STL 12:54
      4h 31m
      1 stop
      DCA 18:25
      St. Louis - Washington D.C. | Tue, Dec 1 | American Airlines
      QAR 538
      77% off
      QAR 2,319 QAR 538
    • STL 14:31
      4h 9m
      1 stop
      DCA 19:40
      St. Louis - Washington D.C. | Tue, Nov 17 | Delta Air Lines
      QAR 1,022
      56% off
      QAR 2,319 QAR 1,022
    • STL 14:31
      4h 9m
      1 stop
      DCA 19:40
      St. Louis - Washington D.C. | Wed, Nov 18 | Delta Air Lines
      QAR 1,024
      56% off
      QAR 2,319 QAR 1,024
    • STL 10:06
      3h 53m
      1 stop
      DCA 14:59
      St. Louis - Washington D.C. | Thu, Dec 3 | Delta Air Lines
      QAR 1,077
      54% off
      QAR 2,319 QAR 1,077
    • STL 07:13
      4h 46m
      1 stop
      DCA 12:59
      St. Louis - Washington D.C. | Sun, Nov 22 | Delta Air Lines
      QAR 1,084
      53% off
      QAR 2,319 QAR 1,084
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Mon, Nov 16 | Normal Airline
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    • STL 14:31
      4h 9m
      1 stop
      DCA 19:40
      St. Louis - Washington D.C. | Tue, Nov 17 | Delta Air Lines
      QAR 1,022 QAR 1,251
      18% off
      18% off
      QAR 1,251 QAR 1,022
    • STL 15:51
      2h 3m
      Direct
      DCA 18:54
      St. Louis - Washington D.C. | Tue, Nov 17 | American Airlines
      QAR 986 QAR 1,251
      21% off
      21% off
      QAR 1,251 QAR 986
    • STL 10:25
      2h 4m
      Direct
      DCA 13:29
      St. Louis - Washington D.C. | Wed, Nov 18 | American Airlines
      QAR 986 QAR 1,251
      21% off
      21% off
      QAR 1,251 QAR 986
    • STL 14:31
      4h 9m
      1 stop
      DCA 19:40
      St. Louis - Washington D.C. | Wed, Nov 18 | Delta Air Lines
      QAR 1,024
      18% off
      QAR 1,251 QAR 1,024
    • STL 14:31
      4h 9m
      1 stop
      DCA 19:40
      St. Louis - Washington D.C. | Thu, Nov 19 | Delta Air Lines
      QAR 1,088
      13% off
      QAR 1,251 QAR 1,088
    • STL 10:33
      2h 11m
      Direct
      DCA 13:44
      St. Louis - Washington D.C. | Sat, Nov 21 | American Airlines
      QAR 978
      22% off
      QAR 1,251 QAR 978
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Mon, Nov 16 | Normal Airline
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    • STL 15:47
      2h 4m
      Direct
      DCA 18:51
      St. Louis - Washington D.C. | Fri, Jan 29 | American Airlines
      QAR 430 QAR 1,213
      65% off
      65% off
      QAR 1,213 QAR 430
    • STL 15:47
      2h 4m
      Direct
      DCA 18:51
      St. Louis - Washington D.C. | Wed, Jan 13 | American Airlines
      QAR 430 QAR 1,213
      65% off
      65% off
      QAR 1,213 QAR 430
    • STL 07:03
      2h 10m
      Direct
      DCA 10:13
      St. Louis - Washington D.C. | Wed, Dec 23 | American Airlines
      QAR 491 QAR 1,213
      60% off
      60% off
      QAR 1,213 QAR 491
    • STL 19:59
      15h 10m
      1 stop
      DCA 12:09
      St. Louis - Washington D.C. | Tue, Nov 17 | Frontier Airlines
      QAR 658
      48% off
      QAR 1,259 QAR 658
    • STL 19:54
      15h 31m
      1 stop
      DCA 12:25
      St. Louis - Washington D.C. | Sat, Dec 19 | Frontier Airlines
      QAR 382
      70% off
      QAR 1,259 QAR 382
    • STL 19:58
      15h 50m
      1 stop
      DCA 12:48
      St. Louis - Washington D.C. | Sat, Dec 5 | Frontier Airlines
      QAR 403
      68% off
      QAR 1,259 QAR 403
    • STL 19:54
      16h 1m
      1 stop
      DCA 12:55
      St. Louis - Washington D.C. | Tue, Dec 8 | Frontier Airlines
      QAR 403
      68% off
      QAR 1,259 QAR 403
    • STL 19:54
      16h 1m
      1 stop
      DCA 12:55
      St. Louis - Washington D.C. | Sat, Dec 12 | Frontier Airlines
      QAR 403
      68% off
      QAR 1,259 QAR 403
    • STL 19:54
      16h 1m
      1 stop
      DCA 12:55
      St. Louis - Washington D.C. | Mon, Dec 14 | Frontier Airlines
      QAR 546
      56% off
      QAR 1,259 QAR 546
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Mon, Nov 16 | Normal Airline
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Which airline offers the cheapest flights from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport?

The cheapest airline flying from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport is Frontier Airlines (from QAR 324) among 1 carriers operating this route. Based on Trip.com's latest 7-day flight data.
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American Airlines logo American Airlines

What is the flight schedule from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport?

Check the schedule for flights from St. Louis to Washington D.C. and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. AA4769

    St. Louis Lambert International Airport

    15:51

    STL

    2h 3m

    18:54

    DCA

    S M T W T - -
    Search

  2. AA4458

    St. Louis Lambert International Airport

    10:25

    STL

    2h 4m

    13:29

    DCA

    S M T W T F S
    Search

  3. AA4703

    St. Louis Lambert International Airport

    06:00

    STL

    2h 8m

    09:08

    DCA

    S M T - - - S
    Search

  4. AA4408

    St. Louis Lambert International Airport

    06:59

    STL

    2h 11m

    10:10

    DCA

    - - - W T F -
    Search

  5. DL2822

    St. Louis Lambert International Airport

    18:00

    STL

    1h 36m

    Direct

    20:36

    DTW

    S M T W T F S
    Search

  6. DL2073

    Detroit Metropolitan Wayne County Airport

    21:20

    DTW

    1h 33m

    Direct

    22:53

    DCA

    S M T W T F S

  7. DL1102

    St. Louis Lambert International Airport

    14:31

    STL

    1h 34m

    Direct

    17:05

    ATL

    S M T W T F S
    Search

  8. DL703

    Hartsfield–Jackson Atlanta International Airport

    18:30

    ATL

    1h 43m

    Direct

    20:13

    DCA

    S M T W T F S

  9. DL2868

    St. Louis Lambert International Airport

    10:20

    STL

    1h 32m

    Direct

    12:52

    DTW

    S M T W T F S
    Search

  10. DL1454

    Detroit Metropolitan Wayne County Airport

    15:50

    DTW

    1h 33m

    Direct

    17:23

    DCA

    S M T W T F S
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FAQs for St. Louis Lambert International Airport to Ronald Reagan Washington National Airport Flights

  • How long is the flight from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport?

    St. Louis Lambert International Airport to Ronald Reagan Washington National Airport takes about 1 hour 38 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 3 daily flights from St. Louis Lambert International Airport (STL) to Ronald Reagan Washington National Airport (DCA).
  • The earliest flight from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport departs at 07:00, and the last departs at 19:55, with about 10 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from St. Louis Lambert International Airport (STL) to Ronald Reagan Washington National Airport (DCA) is quite popular. Without considering departure times or holidays, tickets cost around QAR 802 in December, the most expensive month to book this route.
  • American Airlines is a very popular airline operating an average of 1142 flights per month.
  • One-way flights from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport currently start from QAR 324, and round-trip fares start from QAR 729. The current lowest fare is a Frontier Airlines flight departing on Thu, Nov 19; prices may vary depending on availability.
  • Yes. American Airlines operate direct flights from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport, with an average flight time of 1 hour 37 minutes, and around 46 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport is QAR 755. Prices may vary depending on the departure date, airline, and availability.
  • St. Louis Lambert International Airport to Ronald Reagan Washington National Airport operates around 46 weekly flights, mainly by American Airlines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter St. Louis Lambert International Airport and Ronald Reagan Washington National Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

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Note: Prices shown on this page are the lowest estimated prices found in the last 24 hours and include all taxes and fees.

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Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are shown before payment. Charges for checked baggage, meals, Wi-Fi, and other optional services may also appear in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page have been updated within the last 24 hours, and with many routes refreshed in real time. The more popular the route, the more accurate the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.