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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 $49 and round-trip from $166. Based on Trip.com's latest 7-day flight data.

    • Cheapest nonstop
      STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Sat, Nov 21 | United Airlines
      IAD 2:40 PM
      2h 25m
      Nonstop
      STL 4:05 PM
      Washington D.C. - St. Louis | Wed, Nov 25 |
      $283 $334
      15% off
      15% off
      $334 $283
    • STL 8:30 AM
      2h 5m
      Nonstop
      IAD 11:35 AM
      St. Louis - Washington D.C. | Fri, Dec 11 | United Airlines
      DCA 7:00 PM
      2h 35m
      Nonstop
      STL 8:35 PM
      Washington D.C. - St. Louis | Wed, Dec 16 |
      $297 $334
      11% off
      11% off
      $334 $297
    • STL 12:02 PM
      4h 36m
      1 stop
      IAD 5:38 PM
      St. Louis - Washington D.C. | Mon, Dec 14 | Frontier Airlines
      IAD 5:30 AM
      6h 23m
      1 stop
      STL 10:53 AM
      Washington D.C. - St. Louis | Mon, Dec 21 | Frontier Airlines
      $166 $334
      50% off
      50% off
      $334 $166
    • STL 6:21 PM
      5h 30m
      1 stop
      IAD 12:51 AM
      St. Louis - Washington D.C. | Fri, Dec 18 | Frontier Airlines
      IAD 5:30 AM
      6h 23m
      1 stop
      STL 10:53 AM
      Washington D.C. - St. Louis | Mon, Dec 21 | Frontier Airlines
      $181
      46% off
      $334 $181
    • STL 5:15 PM
      10h 55m
      1 stop
      IAD 5:10 AM
      St. Louis - Washington D.C. | Sat, Nov 21 | Frontier Airlines
      IAD 6:50 AM
      11h 50m
      1 stop
      STL 5:40 PM
      Washington D.C. - St. Louis | Mon, Nov 23 | Frontier Airlines
      $184
      45% off
      $334 $184
    • STL 12:02 PM
      4h 36m
      1 stop
      IAD 5:38 PM
      St. Louis - Washington D.C. | Mon, Dec 7 | Frontier Airlines
      DCA 7:00 AM
      29h 4m
      1 stop
      STL 11:04 AM
      Washington D.C. - St. Louis | Tue, Dec 15 | Frontier Airlines
      $187
      44% off
      $334 $187
    • STL 4:26 PM
      16h 55m
      1 stop
      IAD 10:21 AM
      St. Louis - Washington D.C. | Mon, Nov 16 | Frontier Airlines
      IAD 6:50 AM
      11h 50m
      1 stop
      STL 5:40 PM
      Washington D.C. - St. Louis | Mon, Nov 23 | Frontier Airlines
      $190
      43% off
      $334 $190
    • STL 12:02 PM
      4h 43m
      1 stop
      IAD 5:45 PM
      St. Louis - Washington D.C. | Fri, Dec 4 | Frontier Airlines
      IAD 8:26 PM
      28h 46m
      1 stop
      STL 12:12 AM
      Washington D.C. - St. Louis | Mon, Dec 7 | Frontier Airlines
      $192
      43% off
      $334 $192
    • STL 4:26 PM
      16h 55m
      1 stop
      IAD 10:21 AM
      St. Louis - Washington D.C. | Fri, Nov 13 | Frontier Airlines
      IAD 7:48 AM
      10h 54m
      1 stop
      STL 5:42 PM
      Washington D.C. - St. Louis | Wed, Nov 18 | Frontier Airlines
      $193
      42% off
      $334 $193
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Fri, Nov 13 | Normal Airline
      WAS 3:00 PM
      6h
      Nonstop
      STL 4:00 PM
      Washington D.C. - St. Louis | Sun, Nov 15 | Normal Airline
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    • Cheapest
      STL 6:34 PM
      21h 38m
      1 stop
      IAD 5:12 PM
      St. Louis - Washington D.C. | Mon, Nov 16 | Frontier Airlines
      $49 $202
      76% off
      76% off
      $202 $49
    • STL 6:34 PM
      21h 38m
      1 stop
      IAD 5:12 PM
      St. Louis - Washington D.C. | Wed, Nov 18 | Frontier Airlines
      $55 $202
      73% off
      73% off
      $202 $55
    • STL 12:02 PM
      4h 36m
      1 stop
      IAD 5:38 PM
      St. Louis - Washington D.C. | Mon, Dec 14 | Frontier Airlines
      $73 $202
      64% off
      64% off
      $202 $73
    • STL 6:21 PM
      5h 30m
      1 stop
      IAD 12:51 AM
      St. Louis - Washington D.C. | Wed, Dec 30 | Frontier Airlines
      $77
      62% off
      $202 $77
    • STL 6:21 PM
      5h 30m
      1 stop
      IAD 12:51 AM
      St. Louis - Washington D.C. | Wed, Dec 23 | Frontier Airlines
      $78
      61% off
      $202 $78
    • STL 6:21 PM
      5h 30m
      1 stop
      IAD 12:51 AM
      St. Louis - Washington D.C. | Fri, Dec 18 | Frontier Airlines
      $82
      59% off
      $202 $82
    • STL 12:02 PM
      4h 36m
      1 stop
      IAD 5:38 PM
      St. Louis - Washington D.C. | Fri, Dec 11 | Frontier Airlines
      $114
      44% off
      $202 $114
    • STL 12:02 PM
      4h 36m
      1 stop
      IAD 5:38 PM
      St. Louis - Washington D.C. | Mon, Dec 7 | Frontier Airlines
      $145
      28% off
      $202 $145
    • STL 1:25 PM
      2h 10m
      Nonstop
      IAD 4:35 PM
      St. Louis - Washington D.C. | Wed, Dec 23 | United Airlines
      $166
      55% off
      $369 $166
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Fri, Nov 13 | Normal Airline
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    • Cheapest nonstop
      STL 1:25 PM
      2h 10m
      Nonstop
      IAD 4:35 PM
      St. Louis - Washington D.C. | Wed, Dec 23 | United Airlines
      $166 $369
      55% off
      55% off
      $369 $166
    • STL 8:30 AM
      2h 5m
      Nonstop
      IAD 11:35 AM
      St. Louis - Washington D.C. | Wed, Dec 16 | United Airlines
      $168 $202
      17% off
      17% off
      $202 $168
    • STL 8:30 AM
      2h 5m
      Nonstop
      IAD 11:35 AM
      St. Louis - Washington D.C. | Mon, Dec 14 | United Airlines
      $168 $202
      17% off
      17% off
      $202 $168
    • STL 8:30 AM
      2h 7m
      Nonstop
      IAD 11:37 AM
      St. Louis - Washington D.C. | Mon, Jan 11 | United Airlines
      $198
      46% off
      $369 $198
    • STL 8:30 AM
      2h 7m
      Nonstop
      IAD 11:37 AM
      St. Louis - Washington D.C. | Fri, Jan 29 | United Airlines
      $199
      46% off
      $369 $199
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Mon, Nov 23 | United Airlines
      $270
      27% off
      $369 $270
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Thu, Nov 26 | United Airlines
      $270
      27% off
      $369 $270
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Mon, Nov 16 | United Airlines
      $270
      27% off
      $369 $270
    • STL 8:00 AM
      2h 10m
      Nonstop
      IAD 11:10 AM
      St. Louis - Washington D.C. | Sun, Nov 15 | United Airlines
      $271
      27% off
      $369 $271
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Fri, Nov 13 | Normal Airline
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    • Cheapest nonstop
      STL 1:25 PM
      2h 10m
      Nonstop
      IAD 4:35 PM
      St. Louis - Washington D.C. | Wed, Dec 23 | United Airlines
      $166 $369
      55% off
      55% off
      $369 $166
    • STL 8:30 AM
      2h 7m
      Nonstop
      IAD 11:37 AM
      St. Louis - Washington D.C. | Mon, Jan 11 | United Airlines
      $198 $369
      46% off
      46% off
      $369 $198
    • STL 8:30 AM
      2h 7m
      Nonstop
      IAD 11:37 AM
      St. Louis - Washington D.C. | Fri, Jan 29 | United Airlines
      $199 $369
      46% off
      46% off
      $369 $199
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Mon, Nov 23 | United Airlines
      $270
      27% off
      $369 $270
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Thu, Nov 26 | United Airlines
      $270
      27% off
      $369 $270
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Mon, Nov 16 | United Airlines
      $270
      27% off
      $369 $270
    • STL 8:00 AM
      2h 10m
      Nonstop
      IAD 11:10 AM
      St. Louis - Washington D.C. | Sun, Nov 15 | United Airlines
      $271
      27% off
      $369 $271
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Thu, Nov 19 | United Airlines
      $272
      26% off
      $369 $272
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Fri, Nov 20 | United Airlines
      $278
      25% off
      $369 $278
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Fri, Nov 13 | Normal Airline
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    • Cheapest nonstop
      STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Mon, Nov 16 | United Airlines
      $270 $323
      16% off
      16% off
      $323 $270
    • STL 8:00 AM
      2h 10m
      Nonstop
      IAD 11:10 AM
      St. Louis - Washington D.C. | Sun, Nov 15 | United Airlines
      $271 $323
      16% off
      16% off
      $323 $271
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Fri, Nov 13 | United Airlines
      $281 $323
      13% off
      13% off
      $323 $281
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Thu, Nov 12 | United Airlines
      $287
      11% off
      $323 $287
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Fri, Nov 13 | Normal Airline
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    • STL 8:30 AM
      2h 5m
      Nonstop
      IAD 11:35 AM
      St. Louis - Washington D.C. | Wed, Dec 16 | United Airlines
      $168 $202
      17% off
      17% off
      $202 $168
    • STL 8:30 AM
      2h 5m
      Nonstop
      IAD 11:35 AM
      St. Louis - Washington D.C. | Mon, Dec 14 | United Airlines
      $168 $202
      17% off
      17% off
      $202 $168
    • STL 8:30 AM
      2h 5m
      Nonstop
      IAD 11:35 AM
      St. Louis - Washington D.C. | Fri, Dec 11 | United Airlines
      $327 $402
      19% off
      19% off
      $402 $327
    • STL 1:17 PM
      2h 5m
      Nonstop
      IAD 4:22 PM
      St. Louis - Washington D.C. | Thu, Dec 10 | United Airlines
      $357
      11% off
      $402 $357
    • STL 8:30 AM
      2h 7m
      Nonstop
      IAD 11:37 AM
      St. Louis - Washington D.C. | Mon, Jan 11 | United Airlines
      $198
      46% off
      $369 $198
    • STL 8:30 AM
      2h 7m
      Nonstop
      IAD 11:37 AM
      St. Louis - Washington D.C. | Fri, Jan 29 | United Airlines
      $199
      46% off
      $369 $199
    • STL 1:15 PM
      2h 7m
      Nonstop
      IAD 4:22 PM
      St. Louis - Washington D.C. | Mon, Jan 11 | United Airlines
      $325
      19% off
      $402 $325
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Mon, Nov 23 | United Airlines
      $270
      27% off
      $369 $270
    • STL 1:00 PM
      2h 9m
      Nonstop
      IAD 4:09 PM
      St. Louis - Washington D.C. | Thu, Nov 26 | United Airlines
      $270
      27% off
      $369 $270
    • STL 1:00 PM
      17h 25m
      1 stop
      WAS 2:00 PM
      St. Louis - Washington D.C. | Fri, Nov 13 | 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 $49) among 4 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From $49
Delta Air Lines
From $139
United Airlines
From $283
American Airlines
From $285

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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. DL2822

    St. Louis Lambert International Airport

    6:00 PM

    STL

    1h 36m

    Nonstop

    8:36 PM

    DTW

    S M T W T F S
    Search

  2. DL4704

    Detroit Metropolitan Wayne County Airport

    9:30 PM

    DTW

    1h 32m

    Nonstop

    11:02 PM

    IAD

    S M T W T F S

  3. DL1393

    St. Louis Lambert International Airport

    7:18 PM

    STL

    1h 41m

    Nonstop

    9:59 PM

    ATL

    S M T W T - S
    Search

  4. DL2549

    Hartsfield–Jackson Atlanta International Airport

    10:40 PM

    ATL

    1h 40m

    Nonstop

    12:20 AM

    IAD

    S M T W T F S

  5. F94474

    St. Louis Lambert International Airport

    6:21 PM

    STL

    1h 58m

    Nonstop

    9:19 PM

    ATL

    S - T - T - -
    Search

  6. F93692

    Hartsfield–Jackson Atlanta International Airport

    10:27 PM

    ATL

    1h 52m

    Nonstop

    12:19 AM

    IAD

    S M T W T F S

  7. AA5021

    St. Louis Lambert International Airport

    4:36 PM

    STL

    1h 59m

    Nonstop

    7:35 PM

    CLT

    - - - W T - S
    Search

  8. AA1473

    Charlotte Douglas International Airport

    8:40 PM

    CLT

    1h 24m

    Nonstop

    10:04 PM

    IAD

    S M T W T F S

  9. DL1571

    St. Louis Lambert International Airport

    10:08 AM

    STL

    1h 32m

    Nonstop

    12:40 PM

    ATL

    S M T W T F S
    Search

  10. DL1695

    Hartsfield–Jackson Atlanta International Airport

    2:18 PM

    ATL

    1h 41m

    Nonstop

    3:59 PM

    IAD

    S M T W T F S

  11. 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

  12. DL1444

    Hartsfield–Jackson Atlanta International Airport

    9:50 AM

    ATL

    1h 47m

    Nonstop

    11:37 AM

    IAD

    S M T W T - S

  13. DL2868

    St. Louis Lambert International Airport

    10:20 AM

    STL

    1h 32m

    Nonstop

    12:52 PM

    DTW

    S M T W T F S
    Search

  14. DL1826

    Detroit Metropolitan Wayne County Airport

    2:55 PM

    DTW

    1h 31m

    Nonstop

    4:26 PM

    IAD

    S M T W T - S

  15. AA1250

    St. Louis Lambert International Airport

    8:00 AM

    STL

    1h 56m

    Nonstop

    10:56 AM

    CLT

    S M T W T F S
    Search

  16. AA5220

    Charlotte Douglas International Airport

    11:21 AM

    CLT

    1h 32m

    Nonstop

    12:53 PM

    IAD

    - - - W T F S

  17. 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

  18. DL2549

    Hartsfield–Jackson Atlanta International Airport

    10:40 PM

    ATL

    1h 40m

    Nonstop

    12:20 AM

    IAD

    S M T W T F S

  19. 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

  20. DL2135

    Hartsfield–Jackson Atlanta International Airport

    1:00 PM

    ATL

    1h 41m

    Nonstop

    2:41 PM

    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 $49
Cheapest return ticket price $166

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 38 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 08:00, and the last departs at 13:00, 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 $287 in November, 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 $49, and round-trip fares start from $166. The current lowest fare is a Frontier Airlines flight departing on Mon, Nov 16; 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 36 minutes, and around 14 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 $223. Prices may vary depending on the departure date, airline, and availability.
  • St. Louis Lambert International Airport to Dulles International Airport operates around 14 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.

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

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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.