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St. Louis to Washington DC flight ticket price

Compare live prices for STL to DCA. Use the search panel to change origin, destination, passengers, cabin and trip type instantly.
STL → DCA Approx. 1154.38 km 11 May 2026 Live inventory
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Showing 25 of 110 live flights
Southwest Airlines
WN-1370
19:40
05/11/2026
STL
St Louis Lambert International Airport
3h 0m
Non-stop
22:40
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹12,416
per person
✕ Non-refundable6 fare options
Delta Air Lines
DL-1393
19:01
05/11/2026
STL
St Louis Lambert International Airport
5h 50m
1 Stop
⏱ ATL · 1h 16mATL Airport
00:51
05/12/2026
+1
IAD
Ronald Reagan Washington National Airport
₹12,802
per person
✕ Non-refundable
Delta Air Lines
DL-1485
17:20
05/11/2026
STL
St Louis Lambert International Airport
5h 29m
1 Stop
⏱ ATL · 1h 3mATL Airport
22:49
05/11/2026
BWI
Ronald Reagan Washington National Airport
₹12,802
per person
✕ Non-refundable
Delta Air Lines
DL-1393
19:01
05/11/2026
STL
St Louis Lambert International Airport
5h 56m
1 Stop
⏱ ATL · 1h 21mATL Airport
00:57
05/12/2026
+1
BWI
Ronald Reagan Washington National Airport
₹12,802
per person
✕ Non-refundable
Southwest Airlines
WN-1764
16:40
05/11/2026
STL
St Louis Lambert International Airport
6h 15m
1 Stop
⏱ MDW · 2h 15mMDW Airport
22:55
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹12,896
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-1936
16:30
05/11/2026
STL
St Louis Lambert International Airport
6h 30m
1 Stop
⏱ ATL · 2h 10mATL Airport
23:00
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹12,896
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-2445
14:10
05/11/2026
STL
St Louis Lambert International Airport
8h 50m
2 Stops
⏱ BNA · 2h 25mBNA Airport⏱ ATL · 1h 20mATL Airport
23:00
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹13,962
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-826
13:45
05/11/2026
STL
St Louis Lambert International Airport
9h 15m
2 Stops
⏱ MDW · 1h 5mMDW Airport⏱ ATL · 2h 20mATL Airport
23:00
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹13,962
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-826
13:45
05/11/2026
STL
St Louis Lambert International Airport
10h 5m
2 Stops
⏱ MDW · 0h 55mMDW Airport⏱ BNA · 3h 45mBNA Airport
23:50
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹13,962
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-826
13:45
05/11/2026
STL
St Louis Lambert International Airport
10h 5m
2 Stops
⏱ MDW · 3h 0mMDW Airport⏱ BNA · 1h 40mBNA Airport
23:50
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹13,962
per person
✕ Non-refundable4 fare options
American Airlines
AA-5411
06:00
05/11/2026
STL
St Louis Lambert International Airport
3h 15m
Non-stop
09:15
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹14,684
per person
✕ Non-refundable11 fare options
Southwest Airlines
WN-3411
21:40
05/11/2026
STL
St Louis Lambert International Airport
11h 15m
1 Stop
⏱ MDW · 7h 20mMDW Airport
08:55
05/12/2026
+1
DCA
Ronald Reagan Washington National Airport
₹15,193
per person
✓ Refundable4 fare options
United Airlines
UA-473
07:45
05/11/2026
STL
St Louis Lambert International Airport
8h 13m
1 Stop
⏱ ORD · 3h 43mORD Airport
15:58
05/11/2026
IAD
Ronald Reagan Washington National Airport
₹16,533
per person
✕ Non-refundable3 fare options
United Airlines
UA-4580
19:09
05/11/2026
STL
St Louis Lambert International Airport
5h 24m
1 Stop
⏱ ORD · 0h 55mORD Airport
00:33
05/12/2026
+1
IAD
Ronald Reagan Washington National Airport
₹16,545
per person
✓ Refundable🔥 Last 5 seats2 fare options
American Airlines
AA-5541
15:43
05/11/2026
STL
St Louis Lambert International Airport
3h 15m
Non-stop
18:58
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹16,809
per person
✓ Refundable11 fare options
Southwest Airlines
WN-2013
06:05
05/11/2026
STL
St Louis Lambert International Airport
11h 0m
1 Stop
⏱ PHX · 2h 15mPHX Airport
17:05
05/11/2026
IAD
Ronald Reagan Washington National Airport
₹17,188
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-4442
19:45
05/11/2026
STL
St Louis Lambert International Airport
3h 0m
Non-stop
22:45
05/11/2026
BWI
Ronald Reagan Washington National Airport
₹17,451
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-4440
05:00
05/11/2026
STL
St Louis Lambert International Airport
3h 5m
Non-stop
08:05
05/11/2026
BWI
Ronald Reagan Washington National Airport
₹17,451
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-3144
16:00
05/11/2026
STL
St Louis Lambert International Airport
3h 5m
Non-stop
19:05
05/11/2026
BWI
Ronald Reagan Washington National Airport
₹17,451
per person
✕ Non-refundable5 fare options
Southwest Airlines
WN-826
13:45
05/11/2026
STL
St Louis Lambert International Airport
6h 10m
1 Stop
⏱ MDW · 2h 5mMDW Airport
19:55
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹17,526
per person
✕ Non-refundable🔥 Last 5 seats5 fare options
Southwest Airlines
WN-2952
15:00
05/11/2026
STL
St Louis Lambert International Airport
9h 20m
1 Stop
⏱ DEN · 2h 40mDEN Airport
00:20
05/12/2026
+1
IAD
Ronald Reagan Washington National Airport
₹17,653
per person
✕ Non-refundable
Southwest Airlines
WN-2223
15:50
05/11/2026
STL
St Louis Lambert International Airport
6h 5m
1 Stop
⏱ MCI · 1h 35mMCI Airport
21:55
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹17,997
per person
✕ Non-refundable🔥 Last 1 seats5 fare options
Southwest Airlines
WN-757
10:15
05/11/2026
STL
St Louis Lambert International Airport
5h 30m
1 Stop
⏱ CMH · 1h 50mCMH Airport
15:45
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹17,997
per person
✕ Non-refundable🔥 Last 3 seats5 fare options
Southwest Airlines
WN-1774
13:55
05/11/2026
STL
St Louis Lambert International Airport
9h 55m
2 Stops
⏱ AUS · 0h 55mAUS Airport⏱ BNA · 2h 0mBNA Airport
23:50
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹18,200
per person
✕ Non-refundable4 fare options
Southwest Airlines
WN-4468
12:25
05/11/2026
STL
St Louis Lambert International Airport
11h 25m
2 Stops
⏱ HOU · 2h 15mHOU Airport⏱ BNA · 2h 20mBNA Airport
23:50
05/11/2026
DCA
Ronald Reagan Washington National Airport
₹18,200
per person
✕ Non-refundable🔥 Last 1 seats4 fare options
😕 No flights match your filters.
St. Louis (STL)
📍 St Louis Lambert International Airport
🌍 United States
🕐 GMT -6
📐 Latitude: 38.748697
📐 Longitude: -90.370003
Washington DC (DCA)
📍 Ronald Reagan Washington National Airport
🌍 United States
🕐 GMT -5
📐 Latitude: 38.8521
📐 Longitude: -77.037697

✈ Distance: St. Louis,USA to Washington DC,USA1154.38 km

📅 Results on this page are loaded for 11 May 2026. Click View all flights for the complete live search.

St. Louis to Washington DC — what to expect when booking

The STL–DCA route is served by multiple carriers throughout the year. Fares on this route can move quickly — a price available now may not be there 30 minutes later.

If your dates are flexible, try shifting your departure by a day or two using the date strip above. Mid-week departures often show lower base fares compared to weekend starts on many routes.

The distance between St. Louis,USA and Washington DC,USA is approximately 1154.38 km.

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More flights from St. Louis (STL)
54 routes
St. Louis Atlanta
STL → ATL
St. Louis Boston
STL → BOS
St. Louis Burlington IA
STL → BRL
St. Louis Cancun
STL → CUN
St. Louis Cape Girardeau
STL → CGI
St. Louis Charlotte
STL → CLT
St. Louis Chicago
STL → MDW
St. Louis Cincinnati
STL → CVG
St. Louis Cleveland
STL → CLE
St. Louis Columbus
STL → CMH
St. Louis Dallas
STL → DAL
St. Louis Decatur
STL → DEC
St. Louis Denver
STL → DEN
St. Louis Detroit
STL → DTW
St. Louis Fort Lauderdale
STL → FLL
St. Louis Fort Leonard Wood
STL → TBN
St. Louis Fort Myers
STL → RSW
St. Louis Fort Worth
STL → DFW
St. Louis Grand Rapids
STL → GRR
St. Louis Houston
STL → IAH
St. Louis Houston
STL → HOU
St. Louis Jonesboro
STL → JBR
St. Louis Kansas City
STL → MCI
St. Louis Kirksville
STL → IRK
St. Louis Las Vegas
STL → LAS
St. Louis Little Rock
STL → LIT
St. Louis Los Angeles
STL → LAX
St. Louis Marion
STL → MWA
St. Louis Miami
STL → MIA
St. Louis Milwaukee
STL → MKE
St. Louis Minneapolis
STL → MSP
St. Louis Montego Bay
STL → MBJ
St. Louis Nashville
STL → BNA
St. Louis New Orleans
STL → MSY
St. Louis New York
STL → JFK
St. Louis Oklahoma City
STL → OKC
St. Louis Omaha
STL → OMA
St. Louis Orlando
STL → MCO
St. Louis Owensboro
STL → OWB
St. Louis Philadelphia
STL → PHL
St. Louis Phoenix
STL → PHX
St. Louis Pittsburgh International Airport
STL → PIT
St. Louis Puerto Vallarta
STL → PVR
St. Louis Punta Cana
STL → PUJ
St. Louis Quincy
STL → UIN
St. Louis Raleigh
STL → RDU
St. Louis Salt Lake City
STL → SLC
St. Louis San Antonio
STL → SAT
St. Louis San Diego
STL → SAN
St. Louis San Francisco
STL → SFO
St. Louis Seattle
STL → SEA
St. Louis Tampa
STL → TPA
St. Louis Toronto
STL → YYZ
St. Louis Tulsa
STL → TUL
More flights from Washington DC (DCA)
87 routes
Washington DC Akron
DCA → CAK
Washington DC Albany
DCA → ALB
Washington DC Atlanta
DCA → ATL
Washington DC Augusta
DCA → AGS
Washington DC Austin
DCA → AUS
Washington DC Bangor
DCA → BGR
Washington DC Birmingham
DCA → BHM
Washington DC Boston
DCA → BOS
Washington DC Buffalo
DCA → BUF
Washington DC Burlington
DCA → BTV
Washington DC Charleston
DCA → CHS
Washington DC Charlotte
DCA → CLT
Washington DC Chattanooga
DCA → CHA
Washington DC Chicago
DCA → ORD
Washington DC Cincinnati
DCA → CVG
Washington DC Cleveland
DCA → CLE
Washington DC Columbia
DCA → CAE
Washington DC Columbus
DCA → CMH
Washington DC Dayton
DCA → DAY
Washington DC Denver
DCA → DEN
Washington DC Des Moines
DCA → DSM
Washington DC Detroit
DCA → DTW
Washington DC Fayetteville
DCA → FAY
Washington DC Fort Lauderdale
DCA → FLL
Washington DC Fort Myers
DCA → RSW
Washington DC Fort Walton Beach
DCA → VPS
Washington DC Fort Worth
DCA → DFW
Washington DC Greensboro
DCA → GSO
Washington DC Greenville
DCA → GSP
Washington DC Halifax International
DCA → YHZ
Washington DC Hartford
DCA → BDL
Washington DC Hilton Head Island
DCA → HHH
Washington DC Houston
DCA → IAH
Washington DC Houston
DCA → HOU
Washington DC Huntsville
DCA → HSV
Washington DC Indianapolis
DCA → IND
Washington DC Jackson
DCA → JAN
Washington DC Jacksonville
DCA → JAX
Washington DC Kansas City
DCA → MCI
Washington DC Knoxville
DCA → TYS
Washington DC Lansing
DCA → LAN
Washington DC Las Vegas
DCA → LAS
Washington DC Lexington
DCA → LEX
Washington DC Little Rock
DCA → LIT
Washington DC Long Island
DCA → ISP
Washington DC Los Angeles
DCA → LAX
Washington DC Louisville
DCA → SDF
Washington DC Madison
DCA → MSN
Washington DC Manchester
DCA → MHT
Washington DC Memphis
DCA → MEM
Washington DC Miami
DCA → MIA
Washington DC Milwaukee
DCA → MKE
Washington DC Minneapolis
DCA → MSP
Washington DC Montreal
DCA → YUL
Washington DC Myrtle Beach
DCA → MYR
Washington DC Nashville
DCA → BNA
Washington DC Nassau
DCA → NAS
Washington DC New Orleans
DCA → MSY
Washington DC New York
DCA → EWR
Washington DC Norfolk
DCA → ORF
Washington DC Omaha
DCA → OMA
Washington DC Orlando
DCA → MCO
Washington DC Ottawa
DCA → YOW
Washington DC Pensacola
DCA → PNS
Washington DC Philadelphia
DCA → PHL
Washington DC Phoenix
DCA → PHX
Washington DC Pittsburgh International Airport
DCA → PIT
Washington DC Portland International
DCA → PDX
Washington DC Portland
DCA → PWM
Washington DC Providence
DCA → PVD
Washington DC Raleigh
DCA → RDU
Washington DC Rochester
DCA → ROC
Washington DC Salt Lake City
DCA → SLC
Washington DC San Diego
DCA → SAN
Washington DC San Francisco
DCA → SFO
Washington DC San Juan
DCA → SJU
Washington DC Sarasota
DCA → SRQ
Washington DC Savannah
DCA → SAV
Washington DC Seattle
DCA → SEA
Washington DC St. Louis
DCA → STL
Washington DC Syracuse
DCA → SYR
Washington DC Tallahassee
DCA → TLH
Washington DC Tampa
DCA → TPA
Washington DC Toronto
DCA → YYZ
Washington DC West Palm Beach
DCA → PBI
Washington DC White Plains
DCA → HPN
Washington DC Wilmington
DCA → ILM
❓ Frequently asked questions — St. Louis to Washington DC flights

Generally yes — fares on most routes are most competitive around 4–6 weeks before departure. Booking earlier usually means better availability and a lower base fare when your dates are fixed.

The straight-line distance between St. Louis,USA (STL) and Washington DC,USA (DCA) is approximately 1154.38 km. Actual flying distance may vary slightly depending on routing.

Non-stop availability on this route varies by airline schedule and season. Use the filters below to quickly check whether direct options are available on your selected date.

Mid-week departures often show lower prices than weekend travel on many routes. Use the date strip above to compare nearby days quickly.