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Flights from St. Louis to Washington D.C.
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Find St. Louis to Washington D.C. flights starting at CAD 83.

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip
      • STL06:30
        1h 56m
        Direct
        DCA09:26
        Tue, Dec 3|St. Louis - Washington D.C.|American Airlines
        CAD 83CAD 133
        37% OFF
        37% OFF
        CAD 133CAD 83
      • STL09:59
        2h
        Direct
        DCA12:59
        Wed, Dec 4|St. Louis - Washington D.C.|American Airlines
        CAD 83CAD 133
        37% OFF
        37% OFF
        CAD 133CAD 83
      • STL17:20
        17h 49m
        1 stop
        DCA12:09
        Wed, Oct 30|St. Louis - Washington D.C.|Frontier Airlines
        CAD 85CAD 133
        36% OFF
        36% OFF
        CAD 133CAD 85
      • STL06:30
        1h 56m
        Direct
        DCA09:26
        Tue, Nov 12|St. Louis - Washington D.C.|American Airlines
        CAD 85
        CAD 85
      • STL17:20
        17h 49m
        1 stop
        DCA12:09
        Sat, Oct 26|St. Louis - Washington D.C.|Frontier Airlines
        CAD 87
        CAD 87
      • STL17:30
        17h 39m
        1 stop
        DCA12:09
        Tue, Oct 22|St. Louis - Washington D.C.|Frontier Airlines
        CAD 90
        CAD 90
      • STL17:37
        17h 33m
        1 stop
        DCA12:10
        Tue, Nov 5|St. Louis - Washington D.C.|Frontier Airlines
        CAD 91
        CAD 91
      • STL18:46
        16h 15m
        1 stop
        DCA12:01
        Mon, Dec 9|St. Louis - Washington D.C.|Frontier Airlines
        CAD 91
        CAD 91
      • STL17:30
        17h 39m
        1 stop
        DCA12:09
        Tue, Oct 29|St. Louis - Washington D.C.|Frontier Airlines
        CAD 92
        CAD 92
      • STL17:20
        17h 49m
        1 stop
        DCA12:09
        Wed, Oct 23|St. Louis - Washington D.C.|Frontier Airlines
        CAD 115
        CAD 115
      • STL13:00
        3h 5m
        Direct
        WAS14:00
        Sun, Oct 20|St. Louis - Washington D.C.|American Airlines
        Find More Flights
        Find More Flights

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

When is the cheapest time to fly from St. Louis to Washington D.C.?

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Find Cheapest Airlines Flying from St. Louis to Washington D.C.

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

American Airlines
From CAD 83
Frontier Airlines
From CAD 85
Delta Air Lines
From CAD 115
United Airlines
From CAD 130
Spirit Airlines
From CAD 159
Avelo Airlines
From CAD 173
Sun Country Airlines
From CAD 195
Alaska Airlines
From CAD 307
Southwest Airlines
From CAD 508
ANA airlines

Find more flights and airlines

Alternative Routes for St. Louis to Washington D.C. Flights

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from St. Louis to Washington D.C..

  • Cheapest
    American Airlines
    STL
    09:59
    2h 0m
    Direct
    DCA
    12:59
    St. Louis Lambert International Airport - Ronald Reagan Washington National Airport
    Wed, Dec 4American Airlines
    CAD 83
  • Delta Air Lines
    STL
    17:16
    5h 51m
    1 transfer
    IAD
    00:07
    St. Louis Lambert International Airport - Dulles International Airport
    Tue, Oct 29Delta Air Lines
    CAD 115
  • Delta Air Lines
    STL
    17:16
    5h 51m
    1 transfer
    IAD
    00:07
    St. Louis Lambert International Airport - Dulles International Airport
    Tue, Oct 29Delta Air Lines
    CAD 115
    Find More Flights

FAQ

  • When are flight tickets from St. Louis (STL) to Washington D.C. (WAS) the cheapest?

    Airlines adjust prices for flights from St. Louis to Washington D.C. based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from St. Louis (STL) to Washington D.C. (WAS) cost?

    According to Trip.com's data, the lowest price is around CAD 435.

  • How long is the flight from St. Louis (STL) to Washington D.C. (WAS)?

    It takes about 2 hours 26 minutes to fly from St. Louis (STL) to Washington D.C. (WAS).

  • What are the most popular airlines that fly from St. Louis (STL) to Washington D.C. (WAS)?

    Airlines with flights from St. Louis (STL) to Washington D.C. (WAS): Southwest Airlines, Brussels Airlines, Copa Airlines, United Airlines, Lufthansa, American Airlines and avianca.

  • What's the most popular airline for direct flights from St. Louis (STL) to Washington D.C. (WAS)?

    United Airlines operates 1 direct flights from St. Louis (STL) to Washington D.C. (WAS).

  • How many airports in Washington D.C. (WAS)?

    There are 2 airport(s) in Washington D.C. (WAS): Ronald Reagan Washington National Airport and Dulles International Airport.

How to find a cheap flight from St. Louis to Washington D.C.

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Washington D.C.. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Information for St. Louis to Washington D.C. Flights

Cheapest direct flight price

CAD 83

Cheapest return ticket price

CAD 191

Off-season travel month

September

Peak season for travel

January

Flight distance

1,139.76km

Average flight time

2 hours 26 minutes

Popular airline

American Airlines

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