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St. Louis Lambert International Airport to Dulles International Airport flight
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Cheap Flights from St. Louis Lambert International Airport to Dulles International Airport

Search for flights from St. Louis to Washington D.C.. Find affordable one-way or round-trip flights.

  • One way
  • Round-trip
sortSort by: Lowest Price
  • Sort by: Lowest Price
  • Sort by: Earliest Flight
      • STL17:29
        4h 23m
        1 stop
        IAD22:52
        St. Louis - Washington D.C.|Sat, May 11|Delta Air Lines
        US$84US$144
        42% OFF
        42% OFF
        US$144US$84
      • STL07:10
        5h 32m
        1 stop
        IAD13:42
        St. Louis - Washington D.C.|Tue, Apr 30|American Airlines
        US$101US$144
        30% OFF
        30% OFF
        US$144US$101
      • STL05:04
        4h 48m
        1 stop
        IAD10:52
        St. Louis - Washington D.C.|Sat, May 11|American Airlines
        US$102US$144
        28% OFF
        28% OFF
        US$144US$102
      • STL16:20
        6h 41m
        1 stop
        IAD00:01
        St. Louis - Washington D.C.|Sat, May 18|American Airlines
        US$106
        US$106
      • STL16:20
        6h 41m
        1 stop
        IAD00:01
        St. Louis - Washington D.C.|Thu, May 30|American Airlines
        US$107
        US$107
      • STL16:20
        6h 41m
        1 stop
        IAD00:01
        St. Louis - Washington D.C.|Tue, May 7|American Airlines
        US$107
        US$107
      • STL08:27
        2h 10m
        Direct
        IAD11:37
        St. Louis - Washington D.C.|Tue, Apr 30|United Airlines
        US$109
        US$109
      • STL08:05
        4h 22m
        1 stop
        IAD13:27
        St. Louis - Washington D.C.|Sat, May 4|United Airlines
        US$113
        US$113
      • STL17:25
        5h 47m
        1 stop
        IAD00:12
        St. Louis - Washington D.C.|Sat, May 11|United Airlines
        US$114
        US$114
      • STL11:10
        4h 10m
        1 stop
        IAD16:20
        St. Louis - Washington D.C.|Wed, May 1|United Airlines
        US$115
        US$115
      • STL13:00
        3h 5m
        Direct
        IAD14:00
        St. Louis - Washington D.C.|Sat, May 4|Delta Air Lines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Selected Airlines from St. Louis Lambert International Airport to Dulles International Airport

View airlines operating flights from St. Louis to Washington D.C.. Compare prices and find the airline that meets your travel needs to enjoy a comfortable journey.

Delta Air Lines
From US$84
American Airlines
From US$101
United Airlines
From US$109
Sun Country Airlines
From US$129
Southwest Airlines
From US$150
Frontier Airlines
From US$152
Alaska Airlines
From US$244
ANA airlines
Find more flights and airlines

Find Cheaper Flights from St. Louis to Washington D.C.. Enjoy nonstop flights with 1 airline

Explore other flights from St. Louis to Washington D.C.. Find the best alternative flight.

  • Cheapest
    American Airlines
    STL
    06:16
    1h 59m
    Direct
    DCA
    09:15
    St. Louis Lambert International Airport - Ronald Reagan Washington National Airport
    Sat, May 11American Airlines
    US$78
  • American Airlines
    STL
    06:16
    1h 59m
    Direct
    DCA
    09:15
    St. Louis Lambert International Airport - Ronald Reagan Washington National Airport
    Sat, May 11American Airlines
    US$78
    Find More Flights
Flight Schedule from St. Louis Lambert International Airport to Dulles International 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. AA421

    American Airlines

    05:17

    STL

    1.9h

    08:12

    CLT

    SMTWTFS
    Search

  2. AA5132

    American Airlines

    07:20

    CLT

    1.6h

    08:54

    IAD

    SMTWTFS

  3. AA858

    American Airlines

    07:04

    STL

    1.9h

    09:59

    CLT

    SMTWTFS
    Search

  4. AA5543

    American Airlines

    11:14

    CLT

    1.6h

    12:52

    IAD

    SMTWTFS

  5. UA4183

    United Airlines

    08:05

    STL

    1.6h

    09:39

    ORD

    SMTWTFS
    Search

  6. UA2385

    United Airlines

    10:35

    ORD

    1.8h

    13:25

    IAD

    ---WT--

  7. UA4506

    United Airlines

    08:25

    STL

    2.2h

    Direct

    11:35

    IAD

    SMTWTFS
    Search

  8. UA4426

    United Airlines

    10:19

    STL

    1.5h

    11:48

    ORD

    SMTWTFS
    Search

  9. UA2187

    United Airlines

    13:12

    ORD

    1.8h

    16:01

    IAD

    SMTWTFS

  10. UA2467

    United Airlines

    11:10

    STL

    1.4h

    12:31

    ORD

    SMTWT-S
    Search

  11. UA2187

    United Airlines

    13:12

    ORD

    1.8h

    16:01

    IAD

    SMTWTFS

  12. UA602

    United Airlines

    17:18

    STL

    1.3h

    18:34

    ORD

    ---WT--
    Search

  13. UA2386

    United Airlines

    21:07

    ORD

    1.9h

    23:59

    IAD

    SMTWTF-

  14. DL1485

    Delta Air Lines

    17:25

    STL

    1.7h

    20:05

    ATL

    SMTWTFS
    Search

  15. DL2178

    Delta Air Lines

    22:29

    ATL

    1.7h

    00:10

    IAD

    SMTWTFS

  16. UA714

    United Airlines

    17:25

    STL

    1.3h

    18:45

    ORD

    SMT--FS
    Search

  17. UA2386

    United Airlines

    21:07

    ORD

    1.9h

    23:59

    IAD

    SMTWTF-

  18. UA2368

    United Airlines

    17:35

    STL

    2.4h

    21:00

    EWR

    SMTWTFS
    Search

  19. UA2204

    United Airlines

    21:59

    EWR

    1.3h

    23:18

    IAD

    ---WT--
Find more flights and airlines

St. Louis Lambert International Airport to Dulles International Airport Flights Info

Flight distance1,119.28km
Cheapest one-way ticket price$83
Cheapest return ticket price$182

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

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

    It takes around 2 hours 10 minutes to fly from St. Louis Lambert International Airport (STL) to Dulles International Airport (IAD).

  • How many daily flights are there 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).

  • When are flight tickets from St. Louis Lambert International Airport (STL) to Dulles International Airport (IAD) the cheapest?

    Tickets cost around $315 in May, 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.

  • When are flight tickets from St. Louis Lambert International Airport (STL) to Dulles International Airport (IAD) most expensive?

    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 $315 in May, the most expensive month to book this route.

  • What time does the earliest flight from St. Louis Lambert International Airport to Dulles International Airport depart?

    The earliest flight departs from St. Louis Lambert International Airport (STL) at 08:25 and arrives in Dulles International Airport (IAD) at 11:35.

  • What time does the latest flight from St. Louis Lambert International Airport to Dulles International Airport depart?

    The latest flight departs from St. Louis Lambert International Airport (STL) at 18:00 and arrives in Dulles International Airport (IAD) at 21:10.

  • Which airline operates the most direct flights from St. Louis Lambert International Airport (STL) to Dulles International Airport (IAD)?

    United Airlines is a very popular airline operating an average of 164 flights per month.

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