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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 IDR 900,300 and round-trip from IDR 2,196,800. Based on Trip.com's latest 7-day flight data.

    • Cheapest
      STL 18:34
      21h 38m
      1 stop
      IAD 17:12
      St. Louis - Washington D.C. | Sun, Nov 22 | Frontier Airlines
      IDR 900,300 IDR 3,334,500
      73% off
      73% off
      IDR 3,334,500 IDR 900,300
    • STL 18:35
      4h 46m
      1 stop
      IAD 00:21
      St. Louis - Washington D.C. | Tue, Oct 27 | Frontier Airlines
      IDR 1,008,100 IDR 3,334,500
      70% off
      70% off
      IDR 3,334,500 IDR 1,008,100
    • STL 18:34
      21h 38m
      1 stop
      IAD 17:12
      St. Louis - Washington D.C. | Tue, Nov 24 | Frontier Airlines
      IDR 1,018,900 IDR 3,334,500
      69% off
      69% off
      IDR 3,334,500 IDR 1,018,900
    • STL 18:34
      21h 38m
      1 stop
      IAD 17:12
      St. Louis - Washington D.C. | Thu, Nov 19 | Frontier Airlines
      IDR 1,064,700
      68% off
      IDR 3,334,500 IDR 1,064,700
    • STL 12:02
      4h 45m
      1 stop
      IAD 17:47
      St. Louis - Washington D.C. | Mon, Dec 7 | Frontier Airlines
      IDR 1,560,700
      79% off
      IDR 7,410,800 IDR 1,560,700
    • STL 18:35
      4h 46m
      1 stop
      IAD 00:21
      St. Louis - Washington D.C. | Sun, Oct 25 | Frontier Airlines
      IDR 1,719,700
      48% off
      IDR 3,334,500 IDR 1,719,700
    • STL 17:15
      10h 20m
      1 stop
      IAD 04:35
      St. Louis - Washington D.C. | Wed, Dec 2 | Frontier Airlines
      IDR 1,733,200
      48% off
      IDR 3,334,500 IDR 1,733,200
    • STL 13:20
      6h 20m
      1 stop
      IAD 20:40
      St. Louis - Washington D.C. | Sun, Nov 29 | Frontier Airlines
      IDR 1,819,500
      45% off
      IDR 3,334,500 IDR 1,819,500
    • STL 16:26
      16h 55m
      1 stop
      IAD 10:21
      St. Louis - Washington D.C. | Wed, Nov 11 | Frontier Airlines
      IDR 1,822,200
      45% off
      IDR 3,334,500 IDR 1,822,200
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
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    • Cheapest nonstop
      STL 13:00
      2h 9m
      Direct
      IAD 16:09
      St. Louis - Washington D.C. | Wed, Nov 11 | United Airlines
      DCA 13:44
      2h 37m
      Direct
      STL 15:21
      Washington D.C. - St. Louis | Mon, Nov 16 | American Airlines
      IDR 5,256,100 IDR 6,515,700
      19% off
      19% off
      IDR 6,515,700 IDR 5,256,100
    • STL 08:00
      2h 10m
      Direct
      IAD 11:10
      St. Louis - Washington D.C. | Tue, Nov 3 | United Airlines
      DCA 08:19
      2h 44m
      Direct
      STL 10:03
      Washington D.C. - St. Louis | Mon, Nov 9 | American Airlines
      IDR 5,277,700 IDR 6,515,700
      19% off
      19% off
      IDR 6,515,700 IDR 5,277,700
    • STL 18:35
      4h 46m
      1 stop
      IAD 00:21
      St. Louis - Washington D.C. | Mon, Oct 19 | Frontier Airlines
      IAD 07:50
      10h 50m
      1 stop
      STL 17:40
      Washington D.C. - St. Louis | Wed, Oct 21 | Frontier Airlines
      IDR 2,196,800 IDR 6,515,700
      66% off
      66% off
      IDR 6,515,700 IDR 2,196,800
    • STL 18:35
      4h 46m
      1 stop
      IAD 00:21
      St. Louis - Washington D.C. | Wed, Oct 21 | Frontier Airlines
      IAD 07:54
      7h 26m
      1 stop
      STL 14:20
      Washington D.C. - St. Louis | Thu, Oct 22 | Frontier Airlines
      IDR 2,927,300
      55% off
      IDR 6,515,700 IDR 2,927,300
    • STL 16:26
      16h 55m
      1 stop
      IAD 10:21
      St. Louis - Washington D.C. | Mon, Nov 9 | Frontier Airlines
      IAD 08:05
      10h 35m
      1 stop
      STL 17:40
      Washington D.C. - St. Louis | Wed, Nov 11 | Frontier Airlines
      IDR 3,037,800
      53% off
      IDR 6,515,700 IDR 3,037,800
    • STL 13:20
      6h 20m
      1 stop
      IAD 20:40
      St. Louis - Washington D.C. | Mon, Nov 23 | Frontier Airlines
      IAD 06:50
      11h 50m
      1 stop
      STL 17:40
      Washington D.C. - St. Louis | Fri, Nov 27 | Frontier Airlines
      IDR 3,256,100
      50% off
      IDR 6,515,700 IDR 3,256,100
    • STL 18:35
      4h 46m
      1 stop
      IAD 00:21
      St. Louis - Washington D.C. | Fri, Oct 23 | Frontier Airlines
      IAD 07:40
      11h
      1 stop
      STL 17:40
      Washington D.C. - St. Louis | Fri, Oct 30 | Frontier Airlines
      IDR 3,337,000
      49% off
      IDR 6,515,700 IDR 3,337,000
    • STL 16:26
      16h 55m
      1 stop
      IAD 10:21
      St. Louis - Washington D.C. | Thu, Oct 29 | Frontier Airlines
      IAD 07:40
      11h
      1 stop
      STL 17:40
      Washington D.C. - St. Louis | Mon, Nov 2 | Frontier Airlines
      IDR 3,355,800
      48% off
      IDR 6,515,700 IDR 3,355,800
    • STL 16:26
      16h 55m
      1 stop
      IAD 10:21
      St. Louis - Washington D.C. | Sat, Oct 31 | Frontier Airlines
      IAD 07:40
      11h
      1 stop
      STL 17:40
      Washington D.C. - St. Louis | Mon, Nov 2 | Frontier Airlines
      IDR 3,458,300
      47% off
      IDR 6,515,700 IDR 3,458,300
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
      WAS 15:00
      6h
      Direct
      STL 16:00
      Washington D.C. - St. Louis | Tue, Oct 20 | Normal Airline
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    • Cheapest nonstop
      STL 13:09
      2h 16m
      Direct
      IAD 16:25
      St. Louis - Washington D.C. | Wed, Oct 21 | United Airlines
      IDR 5,730,500 IDR 7,410,800
      23% off
      23% off
      IDR 7,410,800 IDR 5,730,500
    • STL 13:09
      2h 16m
      Direct
      IAD 16:25
      St. Louis - Washington D.C. | Mon, Oct 19 | United Airlines
      IDR 6,002,700 IDR 7,410,800
      19% off
      19% off
      IDR 7,410,800 IDR 6,002,700
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
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    • Cheapest nonstop
      STL 13:09
      2h 16m
      Direct
      IAD 16:25
      St. Louis - Washington D.C. | Wed, Oct 21 | United Airlines
      IDR 5,730,500 IDR 7,410,800
      23% off
      23% off
      IDR 7,410,800 IDR 5,730,500
    • STL 13:09
      2h 16m
      Direct
      IAD 16:25
      St. Louis - Washington D.C. | Mon, Oct 19 | United Airlines
      IDR 6,002,700 IDR 7,410,800
      19% off
      19% off
      IDR 7,410,800 IDR 6,002,700
    • STL 12:02
      4h 45m
      1 stop
      IAD 17:47
      St. Louis - Washington D.C. | Mon, Dec 7 | Frontier Airlines
      IDR 1,560,700 IDR 7,410,800
      79% off
      79% off
      IDR 7,410,800 IDR 1,560,700
    • STL 09:27
      4h 29m
      1 stop
      IAD 14:56
      St. Louis - Washington D.C. | Sat, Oct 31 | American Airlines
      IDR 2,471,700
      67% off
      IDR 7,410,800 IDR 2,471,700
    • STL 12:00
      4h 10m
      1 stop
      IAD 17:10
      St. Louis - Washington D.C. | Sat, Oct 31 | Delta Air Lines
      IDR 2,474,400
      67% off
      IDR 7,410,800 IDR 2,474,400
    • STL 18:35
      4h 46m
      1 stop
      IAD 00:21
      St. Louis - Washington D.C. | Mon, Oct 19 | Frontier Airlines
      IDR 3,536,400
      52% off
      IDR 7,410,800 IDR 3,536,400
    • STL 12:00
      4h 10m
      1 stop
      IAD 17:10
      St. Louis - Washington D.C. | Sat, Oct 17 | Delta Air Lines
      IDR 4,938,100
      33% off
      IDR 7,410,800 IDR 4,938,100
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
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    • Cheapest nonstop
      STL 13:09
      2h 16m
      Direct
      IAD 16:25
      St. Louis - Washington D.C. | Wed, Oct 21 | United Airlines
      IDR 5,730,500 IDR 7,410,800
      23% off
      23% off
      IDR 7,410,800 IDR 5,730,500
    • STL 13:09
      2h 16m
      Direct
      IAD 16:25
      St. Louis - Washington D.C. | Mon, Oct 19 | United Airlines
      IDR 6,002,700 IDR 7,410,800
      19% off
      19% off
      IDR 7,410,800 IDR 6,002,700
    • STL 18:35
      4h 46m
      1 stop
      IAD 00:21
      St. Louis - Washington D.C. | Mon, Oct 19 | Frontier Airlines
      IDR 3,536,400 IDR 7,410,800
      52% off
      52% off
      IDR 7,410,800 IDR 3,536,400
    • STL 12:00
      4h 10m
      1 stop
      IAD 17:10
      St. Louis - Washington D.C. | Sat, Oct 17 | Delta Air Lines
      IDR 4,938,100
      33% off
      IDR 7,410,800 IDR 4,938,100
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Sun, Oct 18 | Normal Airline
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    • STL 13:00
      2h 9m
      Direct
      IAD 16:09
      St. Louis - Washington D.C. | Sat, Oct 31 | United Airlines
      IDR 3,008,100 IDR 7,074,700
      56% off
      56% off
      IDR 7,074,700 IDR 3,008,100
    • STL 13:09
      2h 16m
      Direct
      IAD 16:25
      St. Louis - Washington D.C. | Tue, Oct 20 | United Airlines
      IDR 3,194,100 IDR 7,074,700
      55% off
      55% off
      IDR 7,074,700 IDR 3,194,100
    • STL 13:09
      2h 16m
      Direct
      IAD 16:25
      St. Louis - Washington D.C. | Wed, Oct 21 | United Airlines
      IDR 5,730,500 IDR 7,074,700
      19% off
      19% off
      IDR 7,074,700 IDR 5,730,500
    • STL 13:00
      17h 25m
      1 stop
      WAS 14:00
      St. Louis - Washington D.C. | Sun, Oct 18 | 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 Dulles International Airport?

The cheapest airline flying from St. Louis Lambert International Airport to Dulles International Airport is Frontier Airlines (from IDR 900,300) among 4 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From IDR 900,300
Delta Air Lines
From IDR 2,153,700
American Airlines
From IDR 2,266,900
United Airlines
From IDR 2,514,900

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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

    08:25

    STL

    2h 6m

    11:31

    IAD

    S M T W T - S
    Search

  2. AA712

    St. Louis Lambert International Airport

    07:30

    STL

    1h 57m

    Direct

    10:27

    CLT

    S M T W T F S
    Search

  3. AA5154

    Charlotte Douglas International Airport

    11:20

    CLT

    1h 34m

    Direct

    12:54

    IAD

    S M T W T F S

  4. DL1524

    St. Louis Lambert International Airport

    06:00

    STL

    1h 40m

    Direct

    08:40

    ATL

    S M T W T F S
    Search

  5. DL1444

    Hartsfield–Jackson Atlanta International Airport

    09:45

    ATL

    1h 47m

    Direct

    11:32

    IAD

    S M T W T - S

  6. DL2868

    St. Louis Lambert International Airport

    10:35

    STL

    1h 34m

    Direct

    13:09

    DTW

    S M T W T F S
    Search

  7. DL5037

    Detroit Metropolitan Wayne County Airport

    14:40

    DTW

    1h 36m

    Direct

    16:16

    IAD

    - - - - - F -

  8. F94474

    St. Louis Lambert International Airport

    12:05

    STL

    1h 40m

    Direct

    14:45

    ATL

    S - T - T - -
    Search

  9. F93692

    Hartsfield–Jackson Atlanta International Airport

    22:30

    ATL

    1h 51m

    Direct

    00:21

    IAD

    S M T W T F S

  10. DL2868

    St. Louis Lambert International Airport

    10:35

    STL

    1h 34m

    Direct

    13:09

    DTW

    S M T W T F S
    Search

  11. DL1787

    Detroit Metropolitan Wayne County Airport

    14:57

    DTW

    1h 31m

    Direct

    16:28

    IAD

    S M T W T - S

  12. DL1400

    St. Louis Lambert International Airport

    12:00

    STL

    1h 35m

    Direct

    14:35

    ATL

    S M T W T F S
    Search

  13. DL2902

    Hartsfield–Jackson Atlanta International Airport

    16:45

    ATL

    1h 41m

    Direct

    18:26

    IAD

    S - - W T - S

  14. DL1571

    St. Louis Lambert International Airport

    10:14

    STL

    1h 35m

    Direct

    12:49

    ATL

    S M T W T F S
    Search

  15. DL1554

    Hartsfield–Jackson Atlanta International Airport

    15:27

    ATL

    1h 43m

    Direct

    17:10

    IAD

    - M T - - F -

  16. DL1371

    St. Louis Lambert International Airport

    14:38

    STL

    1h 32m

    Direct

    17:10

    DTW

    S M T W T F S
    Search

  17. DL3088

    Detroit Metropolitan Wayne County Airport

    21:46

    DTW

    1h 30m

    Direct

    23:16

    IAD

    S M T W T F S

  18. DL543

    St. Louis Lambert International Airport

    18:08

    STL

    1h 42m

    Direct

    20:50

    ATL

    S M T W T F S
    Search

  19. DL2549

    Hartsfield–Jackson Atlanta International Airport

    22:40

    ATL

    1h 40m

    Direct

    00:20

    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 1,119.28km
Cheapest one-way ticket price IDR 900,300
Cheapest return ticket price IDR 2,196,800

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 IDR 6,353,100 in October, the most expensive month to book this route.
  • 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 IDR 900,300, and round-trip fares start from IDR 2,196,800. The current lowest fare is a Frontier Airlines flight departing on Sun, Nov 22; 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 IDR 3,782,500. 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.

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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.