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St. Louis Lambert International Airport to Dulles International Airport flight

Explore the cheapest one-way and round-trip flights from St. Louis Lambert International Airport to Dulles International Airport over the next 90 days, with one-way fares from €45 and round-trip from €109. Based on Trip.com's latest 7-day flight data.

    • Cheapest nonstop
      STL 8:00 AM
      2h 10m
      Nonstop
      IAD 11:10 AM
      St. Louis - Washington D.C. | Sun, Nov 1 | United Airlines
      DCA 6:55 PM
      2h 30m
      Nonstop
      STL 8:25 PM
      Washington D.C. - St. Louis | Fri, Nov 6 |
      €254 €321
      21% off
      21% off
      €321 €254
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Mon, Nov 9 | United Airlines
      DCA 1:44 PM
      2h 37m
      Nonstop
      STL 3:21 PM
      Washington D.C. - St. Louis | Sat, Nov 14 | American Airlines
      €260 €321
      19% off
      19% off
      €321 €260
    • STL 6:35 PM
      4h 46m
      1 stop
      IAD 12:21 AM
      St. Louis - Washington D.C. | Mon, Oct 19 | Frontier Airlines
      IAD 7:50 AM
      10h 50m
      1 stop
      STL 5:40 PM
      Washington D.C. - St. Louis | Wed, Oct 21 | Frontier Airlines
      €109 €321
      66% off
      66% off
      €321 €109
    • STL 6:35 PM
      4h 46m
      1 stop
      IAD 12:21 AM
      St. Louis - Washington D.C. | Wed, Oct 21 | Frontier Airlines
      IAD 7:54 AM
      7h 26m
      1 stop
      STL 2:20 PM
      Washington D.C. - St. Louis | Thu, Oct 22 | Frontier Airlines
      €145
      55% off
      €321 €145
    • STL 4:26 PM
      16h 55m
      1 stop
      IAD 10:21 AM
      St. Louis - Washington D.C. | Mon, Nov 9 | Frontier Airlines
      IAD 8:05 AM
      10h 35m
      1 stop
      STL 5:40 PM
      Washington D.C. - St. Louis | Wed, Nov 11 | Frontier Airlines
      €151
      53% off
      €321 €151
    • STL 1:20 PM
      6h 20m
      1 stop
      IAD 8:40 PM
      St. Louis - Washington D.C. | Mon, Nov 23 | Frontier Airlines
      IAD 6:50 AM
      11h 50m
      1 stop
      STL 5:40 PM
      Washington D.C. - St. Louis | Fri, Nov 27 | Frontier Airlines
      €162
      50% off
      €321 €162
    • STL 6:35 PM
      4h 46m
      1 stop
      IAD 12:21 AM
      St. Louis - Washington D.C. | Fri, Oct 23 | Frontier Airlines
      IAD 7:40 AM
      11h
      1 stop
      STL 5:40 PM
      Washington D.C. - St. Louis | Fri, Oct 30 | Frontier Airlines
      €166
      48% off
      €321 €166
    • STL 4:26 PM
      16h 55m
      1 stop
      IAD 10:21 AM
      St. Louis - Washington D.C. | Thu, Oct 29 | Frontier Airlines
      IAD 7:40 AM
      11h
      1 stop
      STL 5:40 PM
      Washington D.C. - St. Louis | Mon, Nov 2 | Frontier Airlines
      €166
      48% off
      €321 €166
    • STL 4:26 PM
      16h 55m
      1 stop
      IAD 10:21 AM
      St. Louis - Washington D.C. | Sat, Oct 31 | Frontier Airlines
      IAD 7:40 AM
      11h
      1 stop
      STL 5:40 PM
      Washington D.C. - St. Louis | Mon, Nov 2 | Frontier Airlines
      €172
      46% off
      €321 €172
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
      WAS 3:00 PM
      6h
      Nonstop
      STL 4:00 PM
      Washington D.C. - St. Louis | Tue, Oct 20 | Normal Airline
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    • Cheapest
      STL 6:34 PM
      21h 38m
      1 stop
      IAD 5:12 PM
      St. Louis - Washington D.C. | Thu, Nov 19 | Frontier Airlines
      €45 €217
      79% off
      79% off
      €217 €45
    • STL 6:35 PM
      4h 46m
      1 stop
      IAD 12:21 AM
      St. Louis - Washington D.C. | Sat, Oct 24 | Frontier Airlines
      €50 €217
      77% off
      77% off
      €217 €50
    • STL 6:34 PM
      21h 38m
      1 stop
      IAD 5:12 PM
      St. Louis - Washington D.C. | Sat, Nov 21 | Frontier Airlines
      €51 €217
      76% off
      76% off
      €217 €51
    • STL 6:34 PM
      21h 38m
      1 stop
      IAD 5:12 PM
      St. Louis - Washington D.C. | Mon, Nov 16 | Frontier Airlines
      €53
      76% off
      €217 €53
    • STL 12:02 PM
      4h 45m
      1 stop
      IAD 5:47 PM
      St. Louis - Washington D.C. | Mon, Dec 7 | Frontier Airlines
      €78
      79% off
      €367 €78
    • STL 5:15 PM
      10h 20m
      1 stop
      IAD 4:35 AM
      St. Louis - Washington D.C. | Sun, Nov 29 | Frontier Airlines
      €86
      60% off
      €217 €86
    • STL 4:26 PM
      16h 55m
      1 stop
      IAD 10:21 AM
      St. Louis - Washington D.C. | Sun, Nov 8 | Frontier Airlines
      €91
      57% off
      €217 €91
    • STL 4:26 PM
      16h 55m
      1 stop
      IAD 10:21 AM
      St. Louis - Washington D.C. | Sun, Nov 1 | Frontier Airlines
      €92
      57% off
      €217 €92
    • STL 4:26 PM
      16h 55m
      1 stop
      IAD 10:21 AM
      St. Louis - Washington D.C. | Sun, Nov 15 | Frontier Airlines
      €92
      57% off
      €217 €92
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
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    • Cheapest nonstop
      STL 1:09 PM
      2h 16m
      Nonstop
      IAD 4:25 PM
      St. Louis - Washington D.C. | Wed, Oct 21 | United Airlines
      €284 €367
      23% off
      23% off
      €367 €284
    • STL 1:09 PM
      2h 16m
      Nonstop
      IAD 4:25 PM
      St. Louis - Washington D.C. | Mon, Oct 19 | United Airlines
      €297 €367
      19% off
      19% off
      €367 €297
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
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    • Cheapest nonstop
      STL 1:09 PM
      2h 16m
      Nonstop
      IAD 4:25 PM
      St. Louis - Washington D.C. | Wed, Oct 21 | United Airlines
      €284 €367
      23% off
      23% off
      €367 €284
    • STL 1:09 PM
      2h 16m
      Nonstop
      IAD 4:25 PM
      St. Louis - Washington D.C. | Mon, Oct 19 | United Airlines
      €297 €367
      19% off
      19% off
      €367 €297
    • STL 12:02 PM
      4h 45m
      1 stop
      IAD 5:47 PM
      St. Louis - Washington D.C. | Mon, Dec 7 | Frontier Airlines
      €78 €367
      79% off
      79% off
      €367 €78
    • STL 9:27 AM
      4h 29m
      1 stop
      IAD 2:56 PM
      St. Louis - Washington D.C. | Sat, Oct 31 | American Airlines
      €123
      66% off
      €367 €123
    • STL 12:00 PM
      4h 10m
      1 stop
      IAD 5:10 PM
      St. Louis - Washington D.C. | Sat, Oct 31 | Delta Air Lines
      €123
      66% off
      €367 €123
    • STL 6:35 PM
      4h 46m
      1 stop
      IAD 12:21 AM
      St. Louis - Washington D.C. | Mon, Oct 19 | Frontier Airlines
      €175
      52% off
      €367 €175
    • STL 12:00 PM
      4h 10m
      1 stop
      IAD 5:10 PM
      St. Louis - Washington D.C. | Sat, Oct 17 | Delta Air Lines
      €245
      33% off
      €367 €245
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
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    • Cheapest nonstop
      STL 1:09 PM
      2h 16m
      Nonstop
      IAD 4:25 PM
      St. Louis - Washington D.C. | Wed, Oct 21 | United Airlines
      €284 €367
      23% off
      23% off
      €367 €284
    • STL 1:09 PM
      2h 16m
      Nonstop
      IAD 4:25 PM
      St. Louis - Washington D.C. | Mon, Oct 19 | United Airlines
      €297 €367
      19% off
      19% off
      €367 €297
    • STL 6:35 PM
      4h 46m
      1 stop
      IAD 12:21 AM
      St. Louis - Washington D.C. | Mon, Oct 19 | Frontier Airlines
      €175 €367
      52% off
      52% off
      €367 €175
    • STL 12:00 PM
      4h 10m
      1 stop
      IAD 5:10 PM
      St. Louis - Washington D.C. | Sat, Oct 17 | Delta Air Lines
      €245
      33% off
      €367 €245
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
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    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Sat, Oct 31 | United Airlines
      €149 €351
      57% off
      57% off
      €351 €149
    • STL 1:09 PM
      2h 16m
      Nonstop
      IAD 4:25 PM
      St. Louis - Washington D.C. | Tue, Oct 20 | United Airlines
      €158 €351
      55% off
      55% off
      €351 €158
    • STL 1:09 PM
      2h 16m
      Nonstop
      IAD 4:25 PM
      St. Louis - Washington D.C. | Wed, Oct 21 | United Airlines
      €284 €351
      19% off
      19% off
      €351 €284
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
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Displayed flight fares from St. Louis to Washington D.C. 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 Dulles International Airport?

The cheapest airline flying from St. Louis Lambert International Airport to Dulles International Airport is Frontier Airlines (from €45) among 4 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From €45
American Airlines
From €115
Delta Air Lines
From €117
United Airlines
From €125

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What is the flight schedule from St. Louis Lambert International Airport to Dulles International 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. UA4506

    St. Louis Lambert International Airport

    8:25 AM

    STL

    2h 6m

    11:31 AM

    IAD

    S M T W T - S
    Search

  2. AA712

    St. Louis Lambert International Airport

    7:30 AM

    STL

    1h 57m

    Nonstop

    10:27 AM

    CLT

    S M T W T F S
    Search

  3. AA5154

    Charlotte Douglas International Airport

    11:20 AM

    CLT

    1h 34m

    Nonstop

    12:54 PM

    IAD

    S M T W T F S

  4. DL1524

    St. Louis Lambert International Airport

    6:00 AM

    STL

    1h 40m

    Nonstop

    8:40 AM

    ATL

    S M T W T F S
    Search

  5. DL1444

    Hartsfield–Jackson Atlanta International Airport

    9:45 AM

    ATL

    1h 47m

    Nonstop

    11:32 AM

    IAD

    S M T W T - S

  6. DL2868

    St. Louis Lambert International Airport

    10:35 AM

    STL

    1h 34m

    Nonstop

    1:09 PM

    DTW

    S M T W T F S
    Search

  7. DL5037

    Detroit Metropolitan Wayne County Airport

    2:40 PM

    DTW

    1h 36m

    Nonstop

    4:16 PM

    IAD

    - - - - - F -

  8. F94474

    St. Louis Lambert International Airport

    12:05 PM

    STL

    1h 40m

    Nonstop

    2:45 PM

    ATL

    S - T - T - -
    Search

  9. F93692

    Hartsfield–Jackson Atlanta International Airport

    10:27 PM

    ATL

    1h 52m

    Nonstop

    12:19 AM

    IAD

    S M T W T F S

  10. DL2868

    St. Louis Lambert International Airport

    10:35 AM

    STL

    1h 34m

    Nonstop

    1:09 PM

    DTW

    S M T W T F S
    Search

  11. DL1787

    Detroit Metropolitan Wayne County Airport

    2:57 PM

    DTW

    1h 31m

    Nonstop

    4:28 PM

    IAD

    S M T W T - S

  12. DL1400

    St. Louis Lambert International Airport

    12:00 PM

    STL

    1h 35m

    Nonstop

    2:35 PM

    ATL

    S M T W T F S
    Search

  13. DL2902

    Hartsfield–Jackson Atlanta International Airport

    4:45 PM

    ATL

    1h 41m

    Nonstop

    6:26 PM

    IAD

    S - - W T - S

  14. DL1571

    St. Louis Lambert International Airport

    10:47 AM

    STL

    1h 36m

    Nonstop

    1:23 PM

    ATL

    S M T W T F S
    Search

  15. DL1554

    Hartsfield–Jackson Atlanta International Airport

    3:27 PM

    ATL

    1h 43m

    Nonstop

    5:10 PM

    IAD

    - M T - - F -

  16. DL1371

    St. Louis Lambert International Airport

    2:38 PM

    STL

    1h 32m

    Nonstop

    5:10 PM

    DTW

    S M T W T F S
    Search

  17. DL3088

    Detroit Metropolitan Wayne County Airport

    9:46 PM

    DTW

    1h 30m

    Nonstop

    11:16 PM

    IAD

    S M T W T F S

  18. DL543

    St. Louis Lambert International Airport

    6:08 PM

    STL

    1h 42m

    Nonstop

    8:50 PM

    ATL

    S M T W T F S
    Search

  19. DL2549

    Hartsfield–Jackson Atlanta International Airport

    10:40 PM

    ATL

    1h 40m

    Nonstop

    12:20 AM

    IAD

    S M T W T F S
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About St. Louis Lambert International Airport and Dulles International Airport

Learn about St. Louis Lambert International Airport (STL) and Dulles International Airport (IAD) — including location, terminals, transportation, and travel tips.

Flight distance 1,119.28 km
Cheapest one-way ticket price €45
Cheapest return ticket price €109

FAQs for St. Louis Lambert International Airport to Dulles International Airport Flights

  • How long is the flight from St. Louis Lambert International Airport to Dulles International Airport?

    St. Louis Lambert International Airport to Dulles International Airport takes about 1 hour 41 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 2 daily flights from St. Louis Lambert International Airport (STL) to Dulles International Airport (IAD).
  • The earliest flight from St. Louis Lambert International Airport to Dulles International Airport departs at 08:30, and the last departs at 14:40, with about 2 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 Dulles International Airport (IAD) is quite popular. Without considering departure times or holidays, tickets cost around €316 in October, the most expensive month to book this route.
  • The earliest flight departs from St. Louis Lambert International Airport (STL) at 08:05 and arrives in Dulles International Airport (IAD) at 11:15.
  • The latest flight departs from St. Louis Lambert International Airport (STL) at 17:20 and arrives in Dulles International Airport (IAD) at 00:15.
  • United Airlines is a very popular airline operating an average of 626 flights per month.
  • One-way flights from St. Louis Lambert International Airport to Dulles International Airport currently start from €45, and round-trip fares start from €109. The current lowest fare is a Frontier Airlines flight departing on Thu, Nov 19; prices may vary depending on availability.
  • Yes. United Airlines operate direct flights from St. Louis Lambert International Airport to Dulles International Airport, with an average flight time of 1 hour 37 minutes, and around 13 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 Dulles International Airport is €188. Prices may vary depending on the departure date, airline, and availability.
  • St. Louis Lambert International Airport to Dulles International Airport operates around 13 weekly flights, mainly by United Airlines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter St. Louis Lambert International Airport and Dulles International 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 estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.