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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 AU$84 and round-trip from AU$251. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        STL 12:44
        2h 6m
        Nonstop
        IAD 15:50
        St. Louis - Washington D.C. | Mon, Sep 14 | United Airlines
        IAD 08:25
        2h 14m
        Nonstop
        STL 09:39
        Washington D.C. - St. Louis | Wed, Sep 16 | United Airlines
        AU$530 AU$764
        31% off
        31% off
        AU$764 AU$530
      • STL 13:00
        2h 6m
        Nonstop
        IAD 16:06
        St. Louis - Washington D.C. | Sat, Sep 12 | United Airlines
        IAD 08:25
        2h 14m
        Nonstop
        STL 09:39
        Washington D.C. - St. Louis | Wed, Sep 16 | United Airlines
        AU$603 AU$764
        21% off
        21% off
        AU$764 AU$603
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Thu, Oct 15 | Frontier Airlines
        IAD 11:12
        13h 1m
        1 stop
        STL 23:13
        Washington D.C. - St. Louis | Thu, Oct 22 | Frontier Airlines
        AU$251 AU$764
        67% off
        67% off
        AU$764 AU$251
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Sat, Sep 19 | Frontier Airlines
        IAD 07:50
        6h 20m
        1 stop
        STL 13:10
        Washington D.C. - St. Louis | Sat, Sep 26 | Frontier Airlines
        AU$254
        67% off
        AU$764 AU$254
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Sat, Sep 26 | Frontier Airlines
        IAD 07:50
        6h 20m
        1 stop
        STL 13:10
        Washington D.C. - St. Louis | Sat, Oct 3 | Frontier Airlines
        AU$255
        67% off
        AU$764 AU$255
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Mon, Sep 21 | Frontier Airlines
        IAD 07:50
        6h 20m
        1 stop
        STL 13:10
        Washington D.C. - St. Louis | Thu, Sep 24 | Frontier Airlines
        AU$258
        66% off
        AU$764 AU$258
      • STL 17:19
        15h 58m
        1 stop
        IAD 10:17
        St. Louis - Washington D.C. | Mon, Oct 5 | Frontier Airlines
        IAD 07:50
        6h 20m
        1 stop
        STL 13:10
        Washington D.C. - St. Louis | Thu, Oct 8 | Frontier Airlines
        AU$258
        66% off
        AU$764 AU$258
      • STL 18:39
        14h 38m
        1 stop
        IAD 10:17
        St. Louis - Washington D.C. | Sun, Sep 20 | Frontier Airlines
        IAD 07:50
        6h 20m
        1 stop
        STL 13:10
        Washington D.C. - St. Louis | Thu, Sep 24 | Frontier Airlines
        AU$259
        66% off
        AU$764 AU$259
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Mon, Oct 12 | Frontier Airlines
        DCA 13:06
        7h 11m
        1 stop
        STL 19:17
        Washington D.C. - St. Louis | Thu, Oct 15 | Frontier Airlines
        AU$260
        66% off
        AU$764 AU$260
      • STL 16:23
        16h 44m
        1 stop
        IAD 10:07
        St. Louis - Washington D.C. | Thu, Sep 17 | Frontier Airlines
        IAD 07:50
        6h 20m
        1 stop
        STL 13:10
        Washington D.C. - St. Louis | Thu, Sep 24 | Frontier Airlines
        AU$264
        65% off
        AU$764 AU$264
      • STL 12:17
        17h 3m
        1 stop
        IAD 06:20
        St. Louis - Washington D.C. | Tue, Sep 29 | Frontier Airlines
        IAD 06:00
        30h 32m
        1 stop
        STL 11:32
        Washington D.C. - St. Louis | Fri, Oct 2 | Frontier Airlines
        AU$279
        63% off
        AU$764 AU$279
      • STL 18:35
        4h 46m
        1 stop
        IAD 00:21
        St. Louis - Washington D.C. | Mon, Oct 26 | Frontier Airlines
        DCA 07:00
        13h 15m
        1 stop
        STL 19:15
        Washington D.C. - St. Louis | Thu, Oct 29 | Frontier Airlines
        AU$284
        63% off
        AU$764 AU$284
      • STL 18:54
        4h 47m
        1 stop
        IAD 00:41
        St. Louis - Washington D.C. | Thu, Sep 24 | Delta Air Lines
        IAD 19:17
        5h 25m
        1 stop
        STL 23:42
        Washington D.C. - St. Louis | Thu, Oct 1 | Delta Air Lines
        AU$291
        62% off
        AU$764 AU$291
      • STL 13:40
        5h 34m
        1 stop
        IAD 20:14
        St. Louis - Washington D.C. | Sat, Sep 19 | Delta Air Lines
        DCA 18:30
        6h 12m
        1 stop
        STL 23:42
        Washington D.C. - St. Louis | Thu, Sep 24 | Delta Air Lines
        AU$294
        62% off
        AU$764 AU$294
      • STL 13:00
        17h 25m
        1 stop
        WAS 14:00
        St. Louis - Washington D.C. | Mon, Aug 31 | Normal Airline
        WAS 15:00
        6h
        Nonstop
        STL 16:00
        Washington D.C. - St. Louis | Wed, Sep 2 | Normal Airline
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      • Cheapest nonstop
        STL 08:30
        2h 16m
        Nonstop
        IAD 11:46
        St. Louis - Washington D.C. | Thu, Oct 15 | United Airlines
        AU$222 AU$284
        22% off
        22% off
        AU$284 AU$222
      • STL 08:40
        2h 14m
        Nonstop
        IAD 11:54
        St. Louis - Washington D.C. | Tue, Sep 8 | United Airlines
        AU$224 AU$284
        21% off
        21% off
        AU$284 AU$224
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Mon, Sep 21 | Frontier Airlines
        AU$84 AU$284
        70% off
        70% off
        AU$284 AU$84
      • STL 14:29
        25h 49m
        1 stop
        IAD 17:18
        St. Louis - Washington D.C. | Thu, Sep 24 | Frontier Airlines
        AU$84
        70% off
        AU$284 AU$84
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Thu, Oct 8 | Frontier Airlines
        AU$94
        67% off
        AU$284 AU$94
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Thu, Oct 1 | Frontier Airlines
        AU$96
        66% off
        AU$284 AU$96
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Mon, Oct 12 | Frontier Airlines
        AU$102
        64% off
        AU$284 AU$102
      • STL 18:35
        21h 43m
        1 stop
        IAD 17:18
        St. Louis - Washington D.C. | Mon, Oct 26 | Frontier Airlines
        AU$103
        64% off
        AU$284 AU$103
      • STL 14:29
        8h 41m
        1 stop
        IAD 00:10
        St. Louis - Washington D.C. | Sat, Sep 19 | Frontier Airlines
        AU$107
        62% off
        AU$284 AU$107
      • STL 18:39
        14h 38m
        1 stop
        IAD 10:17
        St. Louis - Washington D.C. | Sun, Sep 20 | Frontier Airlines
        AU$125
        56% off
        AU$284 AU$125
      • STL 18:45
        9h 16m
        1 stop
        IAD 05:01
        St. Louis - Washington D.C. | Fri, Sep 18 | Frontier Airlines
        AU$130
        54% off
        AU$284 AU$130
      • STL 07:05
        9h 13m
        1 stop
        IAD 17:18
        St. Louis - Washington D.C. | Sat, Sep 19 | Delta Air Lines
        AU$131
        54% off
        AU$284 AU$131
      • STL 17:46
        22h 32m
        1 stop
        IAD 17:18
        St. Louis - Washington D.C. | Fri, Sep 18 | Delta Air Lines
        AU$131
        54% off
        AU$284 AU$131
      • STL 10:35
        6h 1m
        1 stop
        IAD 17:36
        St. Louis - Washington D.C. | Tue, Oct 20 | Frontier Airlines
        AU$134
        53% off
        AU$284 AU$134
      • STL 13:00
        17h 25m
        1 stop
        WAS 14:00
        St. Louis - Washington D.C. | Mon, Aug 31 | Normal Airline
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Displayed flight fares from St. Louis Lambert International Airport to Dulles International 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 Dulles International Airport?

The cheapest airline flying from St. Louis Lambert International Airport to Dulles International Airport is Delta Air Lines (from AU$131) among 4 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Delta Air Lines
From AU$131
American Airlines
From AU$180
Frontier Airlines
From AU$222
United Airlines
From AU$277

Find more flights and airlines

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. AA1515

    St. Louis Lambert International Airport

    05:32

    STL

    1h 57m

    Nonstop

    08:29

    CLT

    - - - - - F S
    Search

  2. AA5154

    Charlotte Douglas International Airport

    11:20

    CLT

    1h 34m

    Nonstop

    12:54

    IAD

    S M T W T F S

  3. DL1400

    St. Louis Lambert International Airport

    11:51

    STL

    1h 39m

    Nonstop

    14:30

    ATL

    S M T W T F S
    Search

  4. DL1695

    Hartsfield–Jackson Atlanta International Airport

    14:21

    ATL

    1h 42m

    Nonstop

    16:03

    IAD

    S M T W T F S

  5. DL2822

    St. Louis Lambert International Airport

    18:09

    STL

    1h 35m

    Nonstop

    20:44

    DTW

    S M T W T F S
    Search

  6. DL3988

    Detroit Metropolitan Wayne County Airport

    21:40

    DTW

    1h 34m

    Nonstop

    23:14

    IAD

    S M T W T F S

  7. DL1524

    St. Louis Lambert International Airport

    06:00

    STL

    1h 40m

    Nonstop

    08:40

    ATL

    S M T W T F S
    Search

  8. DL1444

    Hartsfield–Jackson Atlanta International Airport

    09:52

    ATL

    1h 47m

    Nonstop

    11:39

    IAD

    S M T W T - S

  9. AA712

    St. Louis Lambert International Airport

    07:30

    STL

    1h 57m

    Nonstop

    10:27

    CLT

    S - T W T F S
    Search

  10. AA5154

    Charlotte Douglas International Airport

    11:20

    CLT

    1h 34m

    Nonstop

    12:54

    IAD

    S M T W T F S

  11. DL566

    St. Louis Lambert International Airport

    14:00

    STL

    1h 35m

    Nonstop

    16:35

    ATL

    S M T W T F S
    Search

  12. DL1309

    Hartsfield–Jackson Atlanta International Airport

    19:30

    ATL

    1h 42m

    Nonstop

    21:12

    IAD

    S - - W T - S

  13. DL1400

    St. Louis Lambert International Airport

    11:51

    STL

    1h 39m

    Nonstop

    14:30

    ATL

    S M T W T F S
    Search

  14. DL1309

    Hartsfield–Jackson Atlanta International Airport

    19:30

    ATL

    1h 42m

    Nonstop

    21:12

    IAD

    S - - W T - S

  15. F94474

    St. Louis Lambert International Airport

    18:17

    STL

    2h 3m

    Nonstop

    21:20

    ATL

    S - - W T - S
    Search

  16. F93692

    Hartsfield–Jackson Atlanta International Airport

    22:30

    ATL

    1h 51m

    Nonstop

    00:21

    IAD

    S M T W T F S

  17. DL1536

    St. Louis Lambert International Airport

    07:20

    STL

    1h 39m

    Nonstop

    09:59

    ATL

    S M T W T F S
    Search

  18. F94410

    Hartsfield–Jackson Atlanta International Airport

    15:20

    ATL

    1h 53m

    Nonstop

    17:13

    IAD

    S M T W T F S

  19. F92017

    St. Louis Lambert International Airport

    18:45

    STL

    3h 35m

    Nonstop

    20:20

    LAS

    - M T W T - S
    Search

  20. F94278

    Harry Reid International Airport

    00:46

    LAS

    4h 34m

    Nonstop

    08:20

    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 1,119.28 km
Cheapest one-way ticket price AU$84
Cheapest return ticket price AU$251

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

  • How long does it take to fly from St. Louis Lambert International Airport (STL) to Dulles International Airport (IAD)?

    It takes around 2 hours 11 minutes to fly from St. Louis Lambert International Airport (stl) to Dulles International Airport (iad).
  • There are around 2 daily flights from St. Louis Lambert International Airport (STL) to Dulles International Airport (IAD).
  • Tickets cost around AU$423 in September, making it the cheapest month to book. St. Louis Lambert International Airport (STL) to Dulles International Airport (IAD) is a popular route, so don't forget to book your tickets in advance.
  • 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 AU$423 in September, the most expensive month to book this route.
  • United Airlines is a very popular airline operating an average of 626 flights per month.
  • The earliest flight from St. Louis Lambert International Airport to Dulles International Airport departs at 08:40, and the last departs at 13:00, with about 7 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • St. Louis Lambert International Airport to Dulles International Airport takes about 2 hours 42 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • Yes. Lufthansa, United Airlines, avianca, Copa Airlines and Brussels Airlines operate direct flights from St. Louis Lambert International Airport to Dulles International Airport, with an average flight time of 2 hours 42 minutes, and around 11 weekly flights. Actual flight frequency may vary by season.

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