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Washington DC (DCA) to St. Louis (STL) Flights from ₹11,400

Fares on this route currently start from ₹11,400. Compare live DCA to STL prices, non-stop and connecting flights, departure times and airline choices before booking. Use the search panel to change origin, destination, passengers, cabin and trip type instantly.
DCA → STL Approx. 1154.38 km 04 Jun 2026 Live inventory
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Showing 25 of 142 live flights
Frontier Airlines
F9-4707
07:45
06/04/2026
IAD
Ronald Reagan Washington National Airport
9h 48m
1 Stop
⏱ ATL · 6h 51mATL Airport
17:33
06/04/2026
STL
St Louis Lambert International Airport
₹11,400
per person
✕ Non-refundable
Frontier Airlines
F9-1081
11:07
06/04/2026
IAD
Ronald Reagan Washington National Airport
6h 26m
1 Stop
⏱ ATL · 3h 28mATL Airport
17:33
06/04/2026
STL
St Louis Lambert International Airport
₹13,368
per person
✕ Non-refundable🔥 Last 3 seats
Frontier Airlines
F9-4277
09:12
06/04/2026
IAD
Ronald Reagan Washington National Airport
10h 59m
1 Stop
⏱ LAS · 3h 14mLAS Airport
20:11
06/04/2026
STL
St Louis Lambert International Airport
₹13,368
per person
✕ Non-refundable
Frontier Airlines
F9-685
07:00
06/04/2026
DCA
Ronald Reagan Washington National Airport
12h 23m
1 Stop
⏱ DEN · 7h 8mDEN Airport
19:23
06/04/2026
STL
St Louis Lambert International Airport
₹13,900
per person
✕ Non-refundable
Southwest Airlines
WN-4853
08:00
06/04/2026
DCA
Ronald Reagan Washington National Airport
1h 10m
Non-stop
09:10
06/04/2026
STL
St Louis Lambert International Airport
₹13,942
per person
✕ Non-refundable14 fare options
Delta Air Lines
DL-3826
06:00
06/04/2026
IAD
Ronald Reagan Washington National Airport
3h 29m
1 Stop
⏱ DTW · 1h 14mDTW Airport
09:29
06/04/2026
STL
St Louis Lambert International Airport
₹14,502
per person
✕ Non-refundable6 fare options
American Airlines
AA-365
05:00
06/04/2026
DCA
Ronald Reagan Washington National Airport
3h 32m
1 Stop
⏱ CLT · 1h 13mCLT Airport
08:32
06/04/2026
STL
St Louis Lambert International Airport
₹14,743
per person
✓ Refundable21 fare options
Southwest Airlines
WN-4969
06:55
06/04/2026
DCA
Ronald Reagan Washington National Airport
6h 55m
1 Stop
⏱ ATL · 4h 20mATL Airport
13:50
06/04/2026
STL
St Louis Lambert International Airport
₹15,407
per person
✕ Non-refundable
American Airlines
AA-5413
08:40
06/04/2026
DCA
Ronald Reagan Washington National Airport
1h 32m
Non-stop
10:12
06/04/2026
STL
St Louis Lambert International Airport
₹16,677
per person
✕ Non-refundable26 fare options
United Airlines
UA-2844
08:25
06/04/2026
BWI
Ronald Reagan Washington National Airport
3h 46m
1 Stop
⏱ ORD · 1h 1mORD Airport
12:11
06/04/2026
STL
St Louis Lambert International Airport
₹17,399
per person
✕ Non-refundable🔥 Last 5 seats8 fare options
United Airlines
UA-581
06:20
06/04/2026
BWI
Ronald Reagan Washington National Airport
4h 19m
1 Stop
⏱ ORD · 1h 30mORD Airport
10:39
06/04/2026
STL
St Louis Lambert International Airport
₹17,399
per person
✕ Non-refundable🔥 Last 1 seats8 fare options
United Airlines
UA-581
06:20
06/04/2026
BWI
Ronald Reagan Washington National Airport
5h 51m
1 Stop
⏱ ORD · 3h 5mORD Airport
12:11
06/04/2026
STL
St Louis Lambert International Airport
₹17,498
per person
✓ Refundable3 fare options
Delta Air Lines
DL-950
19:30
06/04/2026
DCA
Ronald Reagan Washington National Airport
4h 29m
1 Stop
⏱ ATL · 1h 39mATL Airport
23:59
06/04/2026
STL
St Louis Lambert International Airport
₹17,877
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-2869
06:05
06/04/2026
DCA
Ronald Reagan Washington National Airport
3h 24m
1 Stop
⏱ DTW · 1h 7mDTW Airport
09:29
06/04/2026
STL
St Louis Lambert International Airport
₹17,877
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-2127
06:08
06/04/2026
IAD
Ronald Reagan Washington National Airport
3h 36m
1 Stop
⏱ ATL · 1h 5mATL Airport
09:44
06/04/2026
STL
St Louis Lambert International Airport
₹17,877
per person
✕ Non-refundable6 fare options
Delta Air Lines
DL-410
06:00
06/04/2026
DCA
Ronald Reagan Washington National Airport
3h 44m
1 Stop
⏱ ATL · 1h 15mATL Airport
09:44
06/04/2026
STL
St Louis Lambert International Airport
₹17,877
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-2601
06:10
06/04/2026
BWI
Ronald Reagan Washington National Airport
3h 19m
1 Stop
⏱ DTW · 1h 1mDTW Airport
09:29
06/04/2026
STL
St Louis Lambert International Airport
₹17,964
per person
✕ Non-refundable5 fare options
Delta Air Lines
DL-2928
19:41
06/04/2026
BWI
Ronald Reagan Washington National Airport
4h 18m
1 Stop
⏱ ATL · 1h 24mATL Airport
23:59
06/04/2026
STL
St Louis Lambert International Airport
₹17,964
per person
✕ Non-refundable4 fare options
American Airlines
AA-1295
11:56
06/04/2026
DCA
Ronald Reagan Washington National Airport
5h 23m
1 Stop
⏱ CLT · 2h 55mCLT Airport
17:19
06/04/2026
STL
St Louis Lambert International Airport
₹18,066
per person
✓ Refundable16 fare options
Southwest Airlines
WN-363
15:45
06/04/2026
DCA
Ronald Reagan Washington National Airport
3h 25m
1 Stop
⏱ MKE · 0h 55mMKE Airport
19:10
06/04/2026
STL
St Louis Lambert International Airport
₹18,336
per person
✕ Non-refundable9 fare options
Southwest Airlines
WN-1441
17:25
06/04/2026
DCA
Ronald Reagan Washington National Airport
6h 40m
1 Stop
⏱ MCO · 2h 40mMCO Airport
00:05
06/05/2026
+1
STL
St Louis Lambert International Airport
₹18,336
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-1432
06:15
06/04/2026
DCA
Ronald Reagan Washington National Airport
6h 30m
1 Stop
⏱ HOU · 2h 15mHOU Airport
12:45
06/04/2026
STL
St Louis Lambert International Airport
₹18,336
per person
✕ Non-refundable
United Airlines
UA-441
07:15
06/04/2026
DCA
Ronald Reagan Washington National Airport
4h 56m
1 Stop
⏱ ORD · 2h 11mORD Airport
12:11
06/04/2026
STL
St Louis Lambert International Airport
₹18,394
per person
✕ Non-refundable8 fare options
United Airlines
UA-1793
06:15
06/04/2026
DCA
Ronald Reagan Washington National Airport
5h 56m
1 Stop
⏱ ORD · 3h 9mORD Airport
12:11
06/04/2026
STL
St Louis Lambert International Airport
₹18,541
per person
✕ Non-refundable🔥 Last 2 seats7 fare options
Southwest Airlines
WN-1461
14:35
06/04/2026
DCA
Ronald Reagan Washington National Airport
1h 15m
Non-stop
15:50
06/04/2026
STL
St Louis Lambert International Airport
₹19,747
per person
✕ Non-refundable🔥 Last 2 seats14 fare options
😕 No flights match your filters.
Washington DC (DCA)
📍 Ronald Reagan Washington National Airport
🌍 United States
🕐 GMT -5
📐 Latitude: 38.8521
📐 Longitude: -77.037697
St. Louis (STL)
📍 St Louis Lambert International Airport
🌍 United States
🕐 GMT -6
📐 Latitude: 38.748697
📐 Longitude: -90.370003

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

📅 Results on this page are loaded for 04 Jun 2026. Click View all flights for the complete live search.

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

The DCA–STL 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 Washington DC,USA and St. Louis,USA is approximately 1154.38 km.

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St. Louis New Orleans
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St. Louis Oklahoma City
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❓ Frequently asked questions — Washington DC to St. Louis 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 Washington DC,USA (DCA) and St. Louis,USA (STL) 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.