Cheap flights from St. Louis to Washington, D.C. from £49

Cheap flights from St. Louis to Washington, D.C. from £49

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1 stop
Wed, Sep 23
St. Louis STLWashington, D.C. BWI
£49
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1 stop
Wed, Sep 23
St. Louis STLWashington, D.C. IAD
£49
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1 stop
Fri, Sep 25
St. Louis STLWashington, D.C. BWI
£79
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Direct
Tue, Sep 22
St. Louis STLWashington, D.C. IAD
£93
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Direct
Wed, Sep 23
St. Louis STLWashington, D.C. IAD
£109
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Direct
Wed, Sep 23
St. Louis STLWashington, D.C. IAD
£130
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1 stop
Wed, Sep 23 – Mon, Sep 28
St. Louis STLWashington, D.C. IAD
£99
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1 stop
Fri, Sep 25 – Wed, Sep 30
St. Louis STLWashington, D.C. IAD
£116
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1 stop
Wed, Sep 23 – Fri, Sep 25
St. Louis STLWashington, D.C. BWI
£123
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1 stop
Fri, Sep 25 – Wed, Sep 30
St. Louis STLWashington, D.C. IAD
£124
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1 stop
Wed, Sep 23 – Sat, Sep 26
St. Louis STLWashington, D.C. BWI
£126
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1 stop
Fri, Sep 25 – Mon, Sep 28
St. Louis STLWashington, D.C. BWI
£129
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How much do flights to Washington, D.C. cost?

Cheapest one-way trip

£49

Cheapest nonstop round-trip

£340

Cheapest round-trip

£99

Average round-trip

£286

Includes rare itinerary

Travel hack

Getting from Washington, D.C. airports to the city center

Fastest options: Metro from DCA. Best value: Metro and bus services from all airports.

Washington, D.C. is served by three major airports, each offering various airport transfers to city center destinations. Ronald Reagan Washington National Airport (DCA) is the closest, located just 6 km south of downtown across the Potomac River. Washington Dulles International Airport (IAD) lies 42 km west of the city center in Virginia. Baltimore/Washington International Thurgood Marshall Airport (BWI) is 50 km northeast in Maryland. Transport options include Metro rail, commuter trains, express buses, taxis, ride-hailing services, and private transfers. Journey times and costs vary depending on the airport, time of day, and traffic conditions.

How to get from Ronald Reagan Washington National Airport (DCA) to Washington, D.C.?

Transport Option

Typical Time

Typical Cost

Frequency

Best For

15-20 min

$2 – $6; varies by destination and time of day

every 8–12 min (traffic dependent)

fastest and most affordable

15-30 min

$15 – $25; metered; varies by traffic

on-demand 24/7 (traffic dependent)

door-to-door convenience

How to get from Washington Dulles International Airport (IAD) to Washington, D.C.?

Transport Option

Typical Time

Typical Cost

Frequency

Best For

45-60 min

$6; flat fare to downtown

every 8–15 min (traffic dependent)

budget travelers

20-30 min

$5; to Wiehle-Reston East Metro

every 20 min (traffic dependent)

connecting to Metro

45-75 min

$65 – $85; metered; varies by traffic

on-demand 24/7 (traffic dependent)

groups with luggage

How to get from Baltimore/Washington International Thurgood Marshall Airport (BWI) to Washington, D.C.?

Transport Option

Typical Time

Typical Cost

Frequency

Best For

35-45 min

$8; one-way fare

hourly weekdays (traffic dependent)

commuters to Union Station

30-40 min

$15 – $50; varies by train type and booking time

multiple daily (traffic dependent)

comfort and speed

50-90 min

$90 – $110; metered; varies by traffic

on-demand 24/7 (traffic dependent)

late night arrivals

Notes:

  • Prices in USD; table created in 2025 and subject to change.
  • Metro fares vary by distance and time of day; use SmarTrip card for best rates.
  • MARC trains operate primarily on weekdays with limited weekend service.
  • Taxi and ride-hailing prices vary with demand and traffic conditions.
  • We recommend checking official transport websites for your travel planning.

Updated: December 2025

Key info about flying to Washington, D.C.

Depart from
St. Louis Lambert International
Arrive to
Washington Dulles International
Average flights per week
367
Flight distance
1118 km
Worth visiting
Lincoln Memorial - National Mall

Weekly direct flights

Discover the top airlines offering direct flights from St. Louis to Washington, D.C. in the next month. You’ll find the number of daily direct flights per airline in the chart.

AirlineMon 31.08Tue 01.09Wed 02.09Thu 03.09Fri 04.09Sat 05.09Sun 06.09
United Airlines
------------122
Weekly flights: 5 totalDaily flights: 0.71 averageMost flights: Saturday 2 flights
AirlineMon 07.09Tue 08.09Wed 09.09Thu 10.09Fri 11.09Sat 12.09Sun 13.09
United Airlines
2222222
Weekly flights: 14 totalDaily flights: 2 averageMost flights: Monday 2 flights
AirlineMon 14.09Tue 15.09Wed 16.09Thu 17.09Fri 18.09Sat 19.09Sun 20.09
United Airlines
2222222
Weekly flights: 14 totalDaily flights: 2 averageMost flights: Monday 2 flights
AirlineMon 21.09Tue 22.09Wed 23.09Thu 24.09Fri 25.09Sat 26.09Sun 27.09
United Airlines
2232212
Weekly flights: 14 totalDaily flights: 2 averageMost flights: Wednesday 3 flights

Check-in for a flight from St. Louis to Washington, D.C.

NameCarrier codeIATA CodePassport needed during booking
United AirlinesUALUANo
Frontier AirlinesFFTF9No
JetBlue AirwaysJBUB6No
Southern Airways ExpressFDY9XYes
WestJetWJAWSNo

Online check-in is not available for these airlines.

Weather in Washington, D.C.

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January5°C-2°C
February7°C0°C
March13°C3°C
April19°C8°C
May23°C13°C
June29°C18°C
July32°C21°C
August30°C20°C
September26°C17°C
October20°C11°C
November13°C5°C
December8°C1°C
Hottest Month
32°C
July
Coldest month
-2°C
January
Sunny days
268
days per year
Snow days
8
days per year

14 day forecast

Sunday
30 Aug
33°C20°C
6 Sep
88%
26°C21°C
Monday
31 Aug
17%
31°C23°C
7 Sep
29°C21°C
Tuesday
1 Sep
20%
36°C24°C
8 Sep
29°C18°C
Wednesday
2 Sep
57%
39°C26°C
9 Sep
13%
32°C21°C
Thursday
3 Sep
63%
37°C23°C
10 Sep
68%
26°C21°C
Friday
4 Sep
43%
34°C24°C
11 Sep
23°C15°C
Saturday
5 Sep
79%
28°C21°C
12 Sep
22°C12°C
Book your trip to arrive at Washington Dulles International, Baltimore–Washington International, or Ronald Reagan Washington National. The distance between St. Louis and Washington, D.C. is 1118 km. The most popular airlines for this route are United Airlines, Frontier Airlines, JetBlue Airways, Southern Airways Express, and WestJet. St. Louis and Washington, D.C. have 367 direct flights per week. When you arrive at Washington, D.C., consider visiting Lincoln Memorial, and National Mall.

Frequently asked questions

How long does it take to travel from St. Louis to Washington, D.C.?

A one-way nonstop (direct) flight between St. Louis and Washington, D.C. takes around 2.2 hours.

What is the flight distance between St. Louis and Washington, D.C.?

The flight distance between St. Louis and Washington, D.C. is 1118 km.

What airlines offer nonstop (direct) flights between St. Louis and Washington, D.C.?

Several carriers operate flights between St. Louis and Washington, D.C.. Airlines offering nonstop (direct) flights include United Airlines.

What are the most popular routes to and from St. Louis?

Travelers frequently search for route combinations, such as St. Louis and London, Las Vegas, Orlando, Cancún, Denver, Los Angeles, San Francisco, Mexico City, Cali, Buenos Aires, Ottawa, Lima, Toronto, Edmonton, San José, Reykjavik, Kelowna, Tuxtla Gutiérrez, Sydney, Fort Lauderdale.

What are the most popular routes to and from Washington, D.C.?

Travelers frequently search for route combinations, such as Washington, D.C. and London, Manchester, Atlanta, Los Angeles, Orlando, Edinburgh, Glasgow, Mexico City, Dallas, Aberdeen, Tampa, Toronto, San Francisco, Denver, Boston, Houston, San Salvador, Lima, Miami, Las Vegas.

What airports are near St. Louis?

The main airport in St. Louis is St. Louis Lambert International. It is also served by St. Louis Lambert International, General Wayne A. Downing Peoria International, Evansville Regional, Columbia Regional, Abraham Lincoln Capital, MidAmerica St. Louis, Waynesville-St. Robert Regional, Central Illinois Regional, Cape Girardeau Regional, Williamson County Regional.

What airports are near Washington, D.C.?

The main airport in Washington, D.C. is Washington Dulles International. It is also served by Philadelphia International, Norfolk International, Richmond International, Atlantic City International, Lehigh Valley International, Trenton–Mercer, Harrisburg International, Salisbury–Ocean City–Wicomico Regional, Hagerstown Regional, Lancaster.

Which airlines fly between St. Louis and Washington, D.C.?

Currently, you can fly between St. Louis and Washington, D.C. with United Airlines, Frontier Airlines, JetBlue Airways, Southern Airways Express, WestJet.

When’s the best time to travel between St. Louis and Washington, D.C.?

If you don’t have specific dates for your trip between St. Louis and Washington, D.C., you can enter a date range into the departure and return fields. Most carriers on the Kiwi.com website allow you to search and book up to six months from the day of your search. Order the search results by the best, cheapest, or fastest route, or find the cheapest outbound and return combination in the pricing table.

What flights operate between St. Louis and Washington, D.C.?

How many airports are there near St. Louis?

How many airports are there near Washington, D.C.?

What time do nonstop (direct) flights between St. Louis and Washington, D.C. depart?

What time do nonstop (direct) flights between St. Louis and Washington, D.C. arrive?

What time do flights between St. Louis and Washington, D.C. depart?

What time do flights between St. Louis and Washington, D.C. arrive?

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any origin and destination in the world by plane. Find the cheapest routes and best deals, as well as the best dates to travel.

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