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Cheap flights from St Louis to Washington

36 nonstop flights a week, 4 of them today. Operated by 3 airlines, about 2h 3m in the air, 709 mi (1,141 km). Tickets from $173, nonstop from $232.

Flights from St Louis to Washington

Pick a departure date to see flights and seller prices

We search agencies and airlines for your day: nonstop and connecting flights, baggage, departure and arrival times.

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Best fares from St Louis to Washington

Lowest one-way prices found by recent searches for the next 120 days; press a card to search that date

Cheapest one-way $173 15 November 2026, with a connection Cheapest nonstop $232 15 November 2026, United Airlines Cheapest in the next 7 days $173 15 November, Sun Cheapest month November 2026 tickets from $173

St Louis to Washington at a glance

flight time, from 1h 55m to 6h 14m
2h 3m
straight-line distance
709 mi (1,141 km)
flights a week
36
flights today
4
first and last departure
05:20 - 08:40
lowest price, with a connection, 15 November
$173
lowest nonstop price
$232
airlines
3

St Louis to Washington flight schedule

36 flights a week, 4 today, 62 seasonal or one-off. Departure and arrival times are local.

FlightDepartsArrivesDurationDaysAircraft
WN 4124
Southwest Airlines
05:20 Lambert-St. Louis International, terminal 2
08:15 Baltimore/Wash International Thurgood Marshall
1h 55m
Sat
Boeing 737-800
WN 4124
Southwest Airlines
06:25 Lambert-St. Louis International, terminal 2
09:20 Baltimore/Wash International Thurgood Marshall
1h 55m
Sat
Boeing 737
WN 4124
Southwest Airlines
06:35 Lambert-St. Louis International, terminal 2
09:30 Baltimore/Wash International Thurgood Marshall
1h 55m
Mon, Tue, Wed, Thu
Boeing 737
WN 4124
Southwest Airlines
06:40 Lambert-St. Louis International, terminal 2
09:35 Baltimore/Wash International Thurgood Marshall
1h 55m
Mon, Thu, Fri, Sun
AA 4408
American Airlines
06:43 Lambert-St. Louis International, terminal 1
09:54 Ronald Reagan National, terminal 2
2h 11m
Sun
Embraer EMB 175
AA 4408
American Airlines
06:53 Lambert-St. Louis International, terminal 1
10:04 Ronald Reagan National, terminal 2
2h 11m
Fri
Embraer EMB 175
AA 4408
American Airlines
06:59 Lambert-St. Louis International, terminal 1
10:10 Ronald Reagan National, terminal 2
2h 11m
Mon, Thu
Embraer EMB 175
AA 4703
American Airlines
07:00 Lambert-St. Louis International, terminal 1
10:08 Ronald Reagan National, terminal 2
2h 8m
Mon, Tue, Wed, Thu, Fri, Sun
Embraer EMB 175
AA 4408
American Airlines
07:02 Lambert-St. Louis International, terminal 1
10:08 Ronald Reagan National, terminal 2
2h 6m
Sat
Embraer EMB 175
AA 4703
American Airlines
07:05 Lambert-St. Louis International, terminal 1
10:09 Ronald Reagan National, terminal 2
2h 4m
Sat
Embraer EMB 175
UA 4506
United Airlines
08:00 Lambert-St. Louis International, terminal 1
11:10 Washington Dulles International
2h 10m
Daily
WN 4137
Southwest Airlines
08:10 Lambert-St. Louis International, terminal 2
11:05 Ronald Reagan National, terminal 1
1h 55m
Sat
WN 738
Southwest Airlines
08:20 Lambert-St. Louis International, terminal 2
11:15 Ronald Reagan National, terminal 1
1h 55m
Mon, Thu, Fri, Sun
WN 1614
Southwest Airlines
08:40 Lambert-St. Louis International, terminal 2
11:35 Ronald Reagan National, terminal 1
1h 55m
Mon, Tue, Wed, Thu, Sat
Boeing 737

Seasonal and one-off flights

Not operating in the next two weeks. The first of them is on 24 November.

FlightDepartsArrivesDurationDaysAircraft
WN 4124
Southwest Airlines
05:35 Lambert-St. Louis International, terminal 2
08:35 Baltimore/Wash International Thurgood Marshall
2h
Seasonal
Boeing 737
WN 4136
Southwest Airlines
08:10 Lambert-St. Louis International, terminal 2
11:05 Ronald Reagan National, terminal 1
1h 55m
Seasonal
Boeing 737
WN 1247
Southwest Airlines
10:10 Lambert-St. Louis International, terminal 2
14:30 Baltimore/Wash International Thurgood Marshall
3h 20m
Seasonal
AA 4408
American Airlines
07:00 Lambert-St. Louis International, terminal 1
10:11 Ronald Reagan National, terminal 2
2h 11m
Seasonal
Embraer EMB 175
WN 4136
Southwest Airlines
08:15 Lambert-St. Louis International, terminal 2
11:10 Ronald Reagan National, terminal 1
1h 55m
Seasonal
Boeing 737
WN 4124
Southwest Airlines
05:00 Lambert-St. Louis International, terminal 2
07:55 Baltimore/Wash International Thurgood Marshall
1h 55m
Seasonal
Boeing 737
WN 4136
Southwest Airlines
09:00 Lambert-St. Louis International, terminal 2
11:55 Ronald Reagan National, terminal 1
1h 55m
Seasonal
Boeing 737-800
WN 852
Southwest Airlines
09:55 Lambert-St. Louis International, terminal 2
14:10 Baltimore/Wash International Thurgood Marshall
3h 15m
Seasonal
UA 4406
United Airlines
08:30 Lambert-St. Louis International, terminal 1
11:35 Washington Dulles International
2h 5m
Seasonal
AA 4337
American Airlines
06:48 Lambert-St. Louis International, terminal 1
10:00 Ronald Reagan National, terminal 2
2h 12m
Seasonal
Embraer EMB 175
AA 4337
American Airlines
06:38 Lambert-St. Louis International, terminal 1
09:44 Ronald Reagan National, terminal 2
2h 6m
Seasonal
Embraer EMB 175
AA 4337
American Airlines
07:03 Lambert-St. Louis International, terminal 1
10:09 Ronald Reagan National, terminal 2
2h 6m
Seasonal
Embraer EMB 175
UA 4506
United Airlines
08:22 Lambert-St. Louis International, terminal 1
11:33 Washington Dulles International
2h 11m
Seasonal
AA 5464
American Airlines
07:03 Lambert-St. Louis International, terminal 1
10:13 Ronald Reagan National, terminal 2
2h 10m
Seasonal
Canadair reg jet 700
AA 2153
American Airlines
06:57 Lambert-St. Louis International, terminal 1
10:00 Ronald Reagan National, terminal 2
2h 3m
Seasonal
Airbus A319
AA 4641
American Airlines
09:57 Lambert-St. Louis International, terminal 1
12:59 Ronald Reagan National, terminal 2
2h 2m
Seasonal
Embraer EMB 175
AA 2153
American Airlines
06:00 Lambert-St. Louis International, terminal 1
09:03 Ronald Reagan National, terminal 2
2h 3m
Seasonal
Airbus A319
AA 5464
American Airlines
07:02 Lambert-St. Louis International, terminal 1
10:12 Ronald Reagan National, terminal 2
2h 10m
Seasonal
Canadair reg jet 700
UA 4506
United Airlines
08:30 Lambert-St. Louis International, terminal 1
11:37 Washington Dulles International
2h 7m
Seasonal
WN 4119
Southwest Airlines
06:30 Lambert-St. Louis International, terminal 2
09:30 Baltimore/Wash International Thurgood Marshall
2h
Seasonal
Boeing 737-800
AA 4525
American Airlines
06:48 Lambert-St. Louis International, terminal 1
10:00 Ronald Reagan National, terminal 2
2h 12m
Seasonal
Embraer EMB 175
WN 4437
Southwest Airlines
09:00 Lambert-St. Louis International, terminal 2
11:55 Ronald Reagan National, terminal 1
1h 55m
Seasonal
AA 4525
American Airlines
06:00 Lambert-St. Louis International, terminal 1
09:12 Ronald Reagan National, terminal 2
2h 12m
Seasonal
Embraer EMB 175
WN 4437
Southwest Airlines
08:40 Lambert-St. Louis International, terminal 2
11:35 Ronald Reagan National, terminal 1
1h 55m
Seasonal
AA 4458
American Airlines
08:48 Lambert-St. Louis International, terminal 1
12:00 Ronald Reagan National, terminal 2
2h 12m
Seasonal
Embraer EMB 175
WN 4119
Southwest Airlines
05:00 Lambert-St. Louis International, terminal 2
08:00 Baltimore/Wash International Thurgood Marshall
2h
Seasonal
WN 4437
Southwest Airlines
08:25 Lambert-St. Louis International, terminal 2
11:20 Ronald Reagan National, terminal 1
1h 55m
Seasonal
WN 4119
Southwest Airlines
05:05 Lambert-St. Louis International, terminal 2
08:05 Baltimore/Wash International Thurgood Marshall
2h
Seasonal
Boeing 737
UA 1486
United Airlines
06:00 Lambert-St. Louis International, terminal 1
13:14 Washington Dulles International
6h 14m
Seasonal
Boeing 737-700
AA 4673
American Airlines
07:06 Lambert-St. Louis International, terminal 1
10:17 Ronald Reagan National, terminal 2
2h 11m
Seasonal
Embraer EMB 175
UA 4506
United Airlines
08:25 Lambert-St. Louis International, terminal 1
11:31 Washington Dulles International
2h 6m
Seasonal
WN 4437
Southwest Airlines
08:05 Lambert-St. Louis International, terminal 2
11:00 Ronald Reagan National, terminal 1
1h 55m
Seasonal
UA 1486
United Airlines
07:00 Lambert-St. Louis International, terminal 1
13:14 Washington Dulles International
5h 14m
Seasonal
Boeing 737-700
AA 4529
American Airlines
07:06 Lambert-St. Louis International, terminal 1
10:17 Ronald Reagan National, terminal 2
2h 11m
Seasonal
Embraer EMB 175
WN 4095
Southwest Airlines
05:05 Lambert-St. Louis International, terminal 2
08:00 Baltimore/Wash International Thurgood Marshall
1h 55m
Seasonal
WN 4106
Southwest Airlines
08:30 Lambert-St. Louis International, terminal 2
11:25 Ronald Reagan National, terminal 1
1h 55m
Seasonal
Boeing 737
WN 1254
Southwest Airlines
05:20 Lambert-St. Louis International, terminal 2
10:00 Baltimore/Wash International Thurgood Marshall
3h 40m
Seasonal
Boeing 737
WN 1065
Southwest Airlines
05:50 Lambert-St. Louis International, terminal 2
08:45 Baltimore/Wash International Thurgood Marshall
1h 55m
Seasonal
Boeing 737-800
WN 3121
Southwest Airlines
08:35 Lambert-St. Louis International, terminal 2
11:30 Ronald Reagan National, terminal 1
1h 55m
Seasonal
WN 4095
Southwest Airlines
05:40 Lambert-St. Louis International, terminal 2
08:35 Baltimore/Wash International Thurgood Marshall
1h 55m
Seasonal
Boeing 737
WN 4106
Southwest Airlines
08:10 Lambert-St. Louis International, terminal 2
11:05 Ronald Reagan National, terminal 1
1h 55m
Seasonal
Boeing 737
WN 4095
Southwest Airlines
06:45 Lambert-St. Louis International, terminal 2
09:40 Baltimore/Wash International Thurgood Marshall
1h 55m
Seasonal
Boeing 737
AA 5163
American Airlines
06:00 Lambert-St. Louis International, terminal 1
09:15 Ronald Reagan National, terminal 2
2h 15m
Seasonal
Canadair reg jet 700
WN 4025
Southwest Airlines
07:00 Lambert-St. Louis International, terminal 2
10:00 Baltimore/Wash International Thurgood Marshall
2h
Seasonal
Boeing 737
WN 4038
Southwest Airlines
08:25 Lambert-St. Louis International, terminal 2
11:25 Ronald Reagan National, terminal 1
2h
Seasonal
AA 5454
American Airlines
10:00 Lambert-St. Louis International, terminal 1
13:12 Ronald Reagan National, terminal 2
2h 12m
Seasonal
Canadair reg jet 700
WN 4025
Southwest Airlines
05:20 Lambert-St. Louis International, terminal 2
08:25 Baltimore/Wash International Thurgood Marshall
2h 5m
Seasonal
WN 4038
Southwest Airlines
08:50 Lambert-St. Louis International, terminal 2
11:50 Ronald Reagan National, terminal 1
2h
Seasonal
Boeing 737
WN 993
Southwest Airlines
05:20 Lambert-St. Louis International, terminal 2
08:25 Baltimore/Wash International Thurgood Marshall
2h 5m
Seasonal
WN 1190
Southwest Airlines
08:15 Lambert-St. Louis International, terminal 2
11:15 Ronald Reagan National, terminal 1
2h
Seasonal
WN 4025
Southwest Airlines
05:05 Lambert-St. Louis International, terminal 2
08:10 Baltimore/Wash International Thurgood Marshall
2h 5m
Seasonal
WN 4038
Southwest Airlines
08:00 Lambert-St. Louis International, terminal 2
11:00 Ronald Reagan National, terminal 1
2h
Seasonal
Boeing 737
AA 5163
American Airlines
05:08 Lambert-St. Louis International, terminal 1
08:28 Ronald Reagan National, terminal 2
2h 20m
Seasonal
Canadair Regional Jet 900
WN 3882
Southwest Airlines
05:25 Lambert-St. Louis International, terminal 2
08:30 Baltimore/Wash International Thurgood Marshall
2h 5m
Seasonal
WN 4966
Southwest Airlines
07:30 Lambert-St. Louis International, terminal 2
10:30 Baltimore/Wash International Thurgood Marshall
2h
Seasonal
Boeing 737
WN 805
Southwest Airlines
08:40 Lambert-St. Louis International, terminal 2
11:35 Ronald Reagan National, terminal 1
1h 55m
Seasonal
Boeing 737
WN 2730
Southwest Airlines
08:00 Lambert-St. Louis International, terminal 2
11:00 Ronald Reagan National, terminal 1
2h
Seasonal
Boeing 737
WN 3882
Southwest Airlines
05:20 Lambert-St. Louis International, terminal 2
08:25 Baltimore/Wash International Thurgood Marshall
2h 5m
Seasonal
WN 5388
Southwest Airlines
08:00 Lambert-St. Louis International, terminal 2
11:00 Ronald Reagan National, terminal 1
2h
Seasonal
WN 3882
Southwest Airlines
06:20 Lambert-St. Louis International, terminal 2
09:20 Baltimore/Wash International Thurgood Marshall
2h
Seasonal
Boeing 737
WN 805
Southwest Airlines
08:10 Lambert-St. Louis International, terminal 2
11:10 Ronald Reagan National, terminal 1
2h
Seasonal
Boeing 737
AA 5163
American Airlines
05:04 Lambert-St. Louis International, terminal 1
08:22 Ronald Reagan National, terminal 2
2h 18m
Seasonal
Canadair Regional Jet 900

Days of the week are taken from the schedule for the next 14 days; schedules change by season. Washington is 1 hour ahead of St Louis. The search shows seat availability and the price for your date.

Airlines flying St Louis to Washington

Flights a week by schedule and the cheapest nonstop fare of each airline found by recent searches

Southwest Airlines17 a week American Airlines12 a week United Airlines7 a week

Airports

Where flights from St Louis to Washington depart and land

Departure from St Louis

Lambert-St. Louis International STL

36 flights a week, terminals 1, 2, 12 mi (19 km) from the city centre

About the airport

Arrival in Washington

Ronald Reagan National closest to the centreDCA

22 flights a week, terminals 1, 2, 3 mi (5 km) from the city centre

About the airport
Baltimore/Wash International Thurgood Marshall BWI

7 flights a week, 28 mi (45 km) from the city centre

About the airport
Washington Dulles International IAD

7 flights a week, 22 mi (36 km) from the city centre

About the airport

When to visit Washington

Weather by month

Best time to visit: April, May, September and October, +20° to +26° by day. In November it is +14° by day and +4° at night, with 8 rainy days.

Jan
+6° −2° 8 days
Feb
+9° −1° 10 days
Mar
+15° +3° 8 days
Apr
+20° +8° 11 days
May
+24° +13° 12 days
Jun
+29° +18° 12 days
Jul
+31° +21° 16 days
Aug
+30° +20° 13 days
Sep
+26° +17° 11 days
Oct
+20° +10° 8 days
Nov
+14° +4° 8 days
Dec
+9° 0° 9 days

Daytime and night temperatures in °C, rainy days. Months with the most comfortable weather are in green. Long-term averages.

Frequently asked questions

How long is the flight from St Louis to Washington?
A nonstop flight takes 2 hours 3 minutes on average, from 1h 55m to 6h 14m depending on the flight.
How far is Washington from St Louis?
709 mi (1,141 km) in a straight line between the cities.
Which airlines fly nonstop from St Louis to Washington?
Southwest Airlines (17 a week), American Airlines (12 a week) and United Airlines (7 a week).
How many flights a day are there from St Louis to Washington?
4 flights today and 36 a week, about 5.1 a day on average.
When are the first and last flights from St Louis to Washington?
The first departure is at 05:20 (WN4124), the last at 08:40 (WN1614). Local time.
What is the cheapest upcoming date to fly from St Louis to Washington?
15 November 2026 (Sunday): from $173 one way, with a connection, by recent searches. The search shows the price for your dates.
Which airline is the cheapest from St Louis to Washington?
United Airlines: nonstop tickets from $232 on 15 November by recent searches. Prices change daily, so compare the sellers in the search.
What is the time difference between St Louis and Washington?
Washington is 1 hour ahead of St Louis. Schedule times on this page are local to each airport.
Which St Louis airport do flights to Washington leave from?
Lambert-St. Louis International (36 a week).
Which Washington airport is closest to the city centre?
Ronald Reagan National (DCA), 3 mi (5 km) from the city centre. Others: Baltimore/Wash International Thurgood Marshall 28 mi (45 km) and Washington Dulles International 22 mi (36 km).