Trip.com
>
Flights
>
Flights to United States
>
Flights to District of Columbia
>
Flights to Washington D.C.
>
St. Louis to Washington D.C. flight
>
St. Louis Lambert International Airport to Ronald Reagan Washington National Airport flight

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 MXN1,779 and round-trip from MXN2,742. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        STL 07:03
        2h 12m
        Nonstop
        DCA 10:15
        St. Louis - Washington D.C. | Thu, Oct 15 | American Airlines
        DCA 16:20
        2h 38m
        Nonstop
        STL 17:58
        Washington D.C. - St. Louis | Sat, Oct 17 | American Airlines
        MXN3,981 MXN5,688
        30% off
        30% off
        MXN5,688 MXN3,981
      • STL 20:10
        19h 49m
        1 stop
        DCA 16:59
        St. Louis - Washington D.C. | Mon, Oct 12 | Frontier Airlines
        IAD 07:50
        6h 20m
        1 stop
        STL 13:10
        Washington D.C. - St. Louis | Wed, Oct 14 | Frontier Airlines
        MXN2,742 MXN5,688
        52% off
        52% off
        MXN5,688 MXN2,742
      • STL 16:18
        28h 32m
        1 stop
        DCA 21:50
        St. Louis - Washington D.C. | Wed, Nov 11 | Frontier Airlines
        IAD 08:05
        10h 35m
        1 stop
        STL 17:40
        Washington D.C. - St. Louis | Wed, Nov 18 | Frontier Airlines
        MXN3,083 MXN5,688
        46% off
        46% off
        MXN5,688 MXN3,083
      • STL 20:10
        15h 1m
        1 stop
        DCA 12:11
        St. Louis - Washington D.C. | Wed, Oct 7 | Frontier Airlines
        DCA 13:06
        7h 11m
        1 stop
        STL 19:17
        Washington D.C. - St. Louis | Sat, Oct 10 | Frontier Airlines
        MXN3,408
        40% off
        MXN5,688 MXN3,408
      • STL 19:59
        15h 10m
        1 stop
        DCA 12:09
        St. Louis - Washington D.C. | Sat, Nov 7 | Frontier Airlines
        IAD 11:16
        13h
        1 stop
        STL 23:16
        Washington D.C. - St. Louis | Sat, Nov 14 | Frontier Airlines
        MXN3,498
        39% off
        MXN5,688 MXN3,498
      • STL 19:59
        15h 10m
        1 stop
        DCA 12:09
        St. Louis - Washington D.C. | Fri, Nov 20 | Frontier Airlines
        IAD 08:05
        10h 35m
        1 stop
        STL 17:40
        Washington D.C. - St. Louis | Wed, Nov 25 | Frontier Airlines
        MXN3,563
        37% off
        MXN5,688 MXN3,563
      • STL 20:00
        19h 56m
        1 stop
        DCA 16:56
        St. Louis - Washington D.C. | Mon, Oct 26 | Frontier Airlines
        IAD 07:50
        10h 50m
        1 stop
        STL 17:40
        Washington D.C. - St. Louis | Wed, Oct 28 | Frontier Airlines
        MXN3,596
        37% off
        MXN5,688 MXN3,596
      • STL 19:59
        15h 10m
        1 stop
        DCA 12:09
        St. Louis - Washington D.C. | Sat, Nov 21 | Frontier Airlines
        IAD 07:40
        11h 59m
        1 stop
        STL 18:39
        Washington D.C. - St. Louis | Thu, Nov 26 | Frontier Airlines
        MXN3,670
        35% off
        MXN5,688 MXN3,670
      • STL 16:18
        18h 51m
        1 stop
        DCA 12:09
        St. Louis - Washington D.C. | Wed, Nov 18 | Frontier Airlines
        DCA 13:00
        7h 14m
        1 stop
        STL 19:14
        Washington D.C. - St. Louis | Sat, Nov 21 | Frontier Airlines
        MXN3,757
        34% off
        MXN5,688 MXN3,757
      • STL 13:00
        17h 25m
        1 stop
        WAS 14:00
        St. Louis - Washington D.C. | Tue, Oct 6 | Normal Airline
        WAS 15:00
        6h
        Nonstop
        STL 16:00
        Washington D.C. - St. Louis | Thu, Oct 8 | Normal Airline
        More cheap flights
        More cheap flights
      • Cheapest nonstop
        STL 17:08
        2h 10m
        Nonstop
        DCA 20:18
        St. Louis - Washington D.C. | Mon, Oct 26 | American Airlines
        MXN2,098 MXN3,026
        31% off
        31% off
        MXN3,026 MXN2,098
      • STL 20:10
        15h 1m
        1 stop
        DCA 12:11
        St. Louis - Washington D.C. | Wed, Oct 7 | Frontier Airlines
        MXN1,779 MXN3,026
        41% off
        41% off
        MXN3,026 MXN1,779
      • STL 20:10
        19h 49m
        1 stop
        DCA 16:59
        St. Louis - Washington D.C. | Mon, Oct 5 | Frontier Airlines
        MXN1,839 MXN3,026
        39% off
        39% off
        MXN3,026 MXN1,839
      • STL 16:18
        23h 29m
        1 stop
        DCA 16:47
        St. Louis - Washington D.C. | Wed, Nov 11 | Frontier Airlines
        MXN1,888
        38% off
        MXN3,026 MXN1,888
      • STL 20:10
        19h 49m
        1 stop
        DCA 16:59
        St. Louis - Washington D.C. | Mon, Oct 12 | Frontier Airlines
        MXN1,891
        38% off
        MXN3,026 MXN1,891
      • STL 16:18
        18h 51m
        1 stop
        DCA 12:09
        St. Louis - Washington D.C. | Wed, Nov 25 | Frontier Airlines
        MXN1,927
        36% off
        MXN3,026 MXN1,927
      • STL 10:25
        6h 1m
        1 stop
        DCA 17:26
        St. Louis - Washington D.C. | Wed, Nov 11 | Delta Air Lines
        MXN2,068
        32% off
        MXN3,026 MXN2,068
      • STL 13:00
        17h 25m
        1 stop
        WAS 14:00
        St. Louis - Washington D.C. | Tue, Oct 6 | Normal Airline
        More cheap flights
        More cheap flights

Displayed flight fares from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

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 MXN1,738) among 4 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From MXN1,738
Delta Air Lines
From MXN2,068
American Airlines
From MXN2,098
United Airlines
From MXN2,789

Find more flights and airlines

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

Check on the flight schedule from St. Louis to Washington D.C. to find the flight that matches your travel plan.

Flight info.
Departure
Arrival
Weekly Schedule

  1. AA2030

    St. Louis Lambert International Airport

    17:08

    STL

    2h 10m

    20:18

    DCA

    S M T W T - S
    Search

  2. AA4645

    St. Louis Lambert International Airport

    11:17

    STL

    2h 11m

    14:28

    DCA

    S M T W T - S
    Search

  3. AA4678

    St. Louis Lambert International Airport

    06:56

    STL

    2h 12m

    10:08

    DCA

    S M T W T F -
    Search

  4. DL1102

    St. Louis Lambert International Airport

    15:48

    STL

    1h 37m

    Nonstop

    18:25

    ATL

    - M T W T F S
    Search

  5. DL832

    Hartsfield–Jackson Atlanta International Airport

    17:30

    ATL

    1h 44m

    Nonstop

    19:14

    DCA

    S M T W T F S

  6. DL1571

    St. Louis Lambert International Airport

    10:05

    STL

    1h 34m

    Nonstop

    12:39

    ATL

    S M T W T F S
    Search

  7. DL850

    Hartsfield–Jackson Atlanta International Airport

    15:12

    ATL

    1h 45m

    Nonstop

    16:57

    DCA

    S M T W T F S

  8. DL2868

    St. Louis Lambert International Airport

    10:29

    STL

    1h 33m

    Nonstop

    13:02

    DTW

    S M T W T F S
    Search

  9. DL1454

    Detroit Metropolitan Wayne County Airport

    14:59

    DTW

    1h 39m

    Nonstop

    16:38

    DCA

    S M T W T F S

  10. DL1102

    St. Louis Lambert International Airport

    15:48

    STL

    1h 37m

    Nonstop

    18:25

    ATL

    - M T W T F S
    Search

  11. DL325

    Hartsfield–Jackson Atlanta International Airport

    19:59

    ATL

    1h 50m

    Nonstop

    21:49

    DCA

    S M T W T F S

  12. DL1400

    St. Louis Lambert International Airport

    12:00

    STL

    1h 35m

    Nonstop

    14:35

    ATL

    S M T W T F S
    Search

  13. DL832

    Hartsfield–Jackson Atlanta International Airport

    17:30

    ATL

    1h 44m

    Nonstop

    19:14

    DCA

    S M T W T F S
Find more flights and airlines

About St. Louis Lambert International Airport and Ronald Reagan Washington National Airport

Learn about St. Louis Lambert International Airport (STL) and Ronald Reagan Washington National Airport (DCA) — including location, terminals, transportation, and travel tips.

Flight distance 1,154.87 km
Cheapest one-way ticket price MXN1,779
Cheapest return ticket price MXN2,742

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 44 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 06:00, and the last departs at 19:55, with about 14 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 MXN5,972 in October, the most expensive month to book this route.
  • The earliest flight departs from St. Louis Lambert International Airport at 06:00 and arrives in Ronald Reagan Washington National Airport at 09:10.
  • The latest flight departs from St. Louis Lambert International Airport at 18:08 and arrives in Ronald Reagan Washington National Airport at 21:10.
  • 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 MXN1,779, and round-trip fares start from MXN2,742. The current lowest fare is a Frontier Airlines flight departing on Wed, Oct 7; 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 39 minutes, and around 45 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 MXN3,745. 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.

Popular Destinations

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

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date 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.