All airlines flying from Dulles, Washington (IAD) to Saint Louis (STL).

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 08:20 Dulles, Washington (IAD) 09:48 Saint Louis (STL) 1
United Airlines UA 4427 Non-stop Canadair CRJ 550 (CR5) 2:28 Effective from 2025-08-19
Daily 08:35 Dulles, Washington (IAD) 09:58 Saint Louis (STL) 1
United Airlines UA 4427 Non-stop Canadair CRJ 550 (CR5) 2:23 Valid until 2025-05-21
Daily 08:40 Dulles, Washington (IAD) 09:56 Saint Louis (STL) 1
United Airlines UA 4427 Non-stop Canadair CRJ 550 (CR5) 2:16 Effective 2025-05-22 through 2025-06-25
Daily 08:40 Dulles, Washington (IAD) 09:59 Saint Louis (STL) 1
United Airlines UA 4427 Non-stop Canadair CRJ 550 (CR5) 2:19 Effective 2025-06-26 through 2025-08-18
Daily 17:10 Dulles, Washington (IAD) 18:33 Saint Louis (STL) 1
United Airlines UA 4527 Non-stop Canadair CRJ 550 (CR5) 2:23 Effective from 2025-08-19
Daily 17:38 Dulles, Washington (IAD) 19:00 Saint Louis (STL) 1
United Airlines UA 4527 Non-stop Canadair CRJ 550 (CR5) 2:22 Effective 2025-06-26 through 2025-08-18
Daily 17:55 Dulles, Washington (IAD) 19:23 Saint Louis (STL) 1
United Airlines UA 4527 Non-stop Canadair CRJ 550 (CR5) 2:28 Valid until 2025-05-21
Daily 17:55 Dulles, Washington (IAD) 19:22 Saint Louis (STL) 1
United Airlines UA 4527 Non-stop Canadair CRJ 550 (CR5) 2:27 Effective 2025-05-22 through 2025-06-25
Non-Direct Flights:
Mon-Fri 15:40 Dulles, Washington (IAD) 21:25 Saint Louis (STL) 1
United Airlines UA 591 1-stop Boeing 737-900 (739) 6:45 Effective 2025-06-02 through 2025-06-24
Direct Codeshare Flights:
Daily 17:10 Dulles, Washington (IAD) 18:33 Saint Louis (STL) 1
Avianca AV 2342 Non-stop Canadair CRJ 550 (CR5) 2:23 Effective from 2025-08-19
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:38 Dulles, Washington (IAD) 19:00 Saint Louis (STL) 1
Avianca AV 2342 Non-stop Canadair CRJ 550 (CR5) 2:22 Effective 2025-06-26 through 2025-08-18
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:55 Dulles, Washington (IAD) 19:23 Saint Louis (STL) 1
Avianca AV 2342 Non-stop Canadair CRJ 550 (CR5) 2:28 Valid until 2025-05-21
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:55 Dulles, Washington (IAD) 19:22 Saint Louis (STL) 1
Avianca AV 2342 Non-stop Canadair CRJ 550 (CR5) 2:27 Effective 2025-05-22 through 2025-06-25
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 08:20 Dulles, Washington (IAD) 09:48 Saint Louis (STL) 1
Avianca AV 2344 Non-stop Canadair CRJ 550 (CR5) 2:28 Effective from 2025-08-19
Codeshare flight, operated by United Airlines.(UA 4427)
Daily 08:35 Dulles, Washington (IAD) 09:58 Saint Louis (STL) 1
Avianca AV 2344 Non-stop Canadair CRJ 550 (CR5) 2:23 Valid until 2025-05-21
Codeshare flight, operated by United Airlines.(UA 4427)
Daily 08:40 Dulles, Washington (IAD) 09:56 Saint Louis (STL) 1
Avianca AV 2344 Non-stop Canadair CRJ 550 (CR5) 2:16 Effective 2025-05-22 through 2025-06-25
Codeshare flight, operated by United Airlines.(UA 4427)
Daily 08:40 Dulles, Washington (IAD) 09:59 Saint Louis (STL) 1
Avianca AV 2344 Non-stop Canadair CRJ 550 (CR5) 2:19 Effective 2025-06-26 through 2025-08-18
Codeshare flight, operated by United Airlines.(UA 4427)
Daily 17:10 Dulles, Washington (IAD) 18:33 Saint Louis (STL) 1
Copa Airlines CM 2678 Non-stop Canadair CRJ 550 (CR5) 2:23 Effective 2025-08-19 through 2025-10-25
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:10 Dulles, Washington (IAD) 18:33 Saint Louis (STL) 1
Copa Airlines CM 2678 Non-stop Canadair CRJ 550 (CR5) 2:23 Effective from 2025-11-02
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:38 Dulles, Washington (IAD) 19:00 Saint Louis (STL) 1
Copa Airlines CM 2678 Non-stop Canadair CRJ 550 (CR5) 2:22 Effective 2025-06-26 through 2025-08-18
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:55 Dulles, Washington (IAD) 19:23 Saint Louis (STL) 1
Copa Airlines CM 2678 Non-stop Canadair CRJ 550 (CR5) 2:28 Valid until 2025-05-21
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:55 Dulles, Washington (IAD) 19:22 Saint Louis (STL) 1
Copa Airlines CM 2678 Non-stop Canadair CRJ 550 (CR5) 2:27 Effective 2025-05-22 through 2025-06-25
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 08:20 Dulles, Washington (IAD) 09:48 Saint Louis (STL) 1
Copa Airlines CM 2679 Non-stop Canadair CRJ 550 (CR5) 2:28 Effective 2025-08-19 through 2025-09-08
Codeshare flight, operated by United Airlines.(UA 4427)
Mon,Wed-Sun 08:20 Dulles, Washington (IAD) 09:48 Saint Louis (STL) 1
Copa Airlines CM 2679 Non-stop Canadair CRJ 550 (CR5) 2:28 Effective 2025-09-10 through 2025-10-06
Codeshare flight, operated by United Airlines.(UA 4427)
Daily 08:20 Dulles, Washington (IAD) 09:48 Saint Louis (STL) 1
Copa Airlines CM 2679 Non-stop Canadair CRJ 550 (CR5) 2:28 Effective from 2025-10-07
Codeshare flight, operated by United Airlines.(UA 4427)
Daily 08:35 Dulles, Washington (IAD) 09:58 Saint Louis (STL) 1
Copa Airlines CM 2679 Non-stop Canadair CRJ 550 (CR5) 2:23 Valid until 2025-05-21
Codeshare flight, operated by United Airlines.(UA 4427)
Daily 08:40 Dulles, Washington (IAD) 09:56 Saint Louis (STL) 1
Copa Airlines CM 2679 Non-stop Canadair CRJ 550 (CR5) 2:16 Effective 2025-05-22 through 2025-06-25
Codeshare flight, operated by United Airlines.(UA 4427)
Daily 08:40 Dulles, Washington (IAD) 09:59 Saint Louis (STL) 1
Copa Airlines CM 2679 Non-stop Canadair CRJ 550 (CR5) 2:19 Effective 2025-06-26 through 2025-08-18
Codeshare flight, operated by United Airlines.(UA 4427)
Daily 17:10 Dulles, Washington (IAD) 18:33 Saint Louis (STL) 1
Brussels Airlines SN 9012 Non-stop Canadair CRJ 550 (CR5) 2:23 Effective from 2025-08-19
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:38 Dulles, Washington (IAD) 19:00 Saint Louis (STL) 1
Brussels Airlines SN 9012 Non-stop Canadair CRJ 550 (CR5) 2:22 Effective 2025-06-26 through 2025-08-18
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:55 Dulles, Washington (IAD) 19:23 Saint Louis (STL) 1
Brussels Airlines SN 9012 Non-stop Canadair CRJ 550 (CR5) 2:28 Valid until 2025-05-21
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:55 Dulles, Washington (IAD) 19:22 Saint Louis (STL) 1
Brussels Airlines SN 9012 Non-stop Canadair CRJ 550 (CR5) 2:27 Effective 2025-05-22 through 2025-06-25
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:10 Dulles, Washington (IAD) 18:33 Saint Louis (STL) 1
Lufthansa LH 9286 Non-stop Canadair CRJ 550 (CR5) 2:23 Effective 2025-08-19 through 2025-10-25
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:10 Dulles, Washington (IAD) 18:33 Saint Louis (STL) 1
Lufthansa LH 9286 Non-stop Canadair CRJ 550 (CR5) 2:23 Effective from 2025-11-02
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:38 Dulles, Washington (IAD) 19:00 Saint Louis (STL) 1
Lufthansa LH 9286 Non-stop Canadair CRJ 550 (CR5) 2:22 Effective 2025-06-26 through 2025-08-18
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:55 Dulles, Washington (IAD) 19:23 Saint Louis (STL) 1
Lufthansa LH 9286 Non-stop Canadair CRJ 550 (CR5) 2:28 Valid until 2025-05-21
Codeshare flight, operated by United Airlines.(UA 4527)
Daily 17:55 Dulles, Washington (IAD) 19:22 Saint Louis (STL) 1
Lufthansa LH 9286 Non-stop Canadair CRJ 550 (CR5) 2:27 Effective 2025-05-22 through 2025-06-25
Codeshare flight, operated by United Airlines.(UA 4527)
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All airlines flying from Dulles, Washington (IAD) to Saint Louis (STL).
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA4427
08:20
Dulles, Washington (IAD)

09:48
Saint Louis (STL) 1
Effective from 2025-08-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
United Airlines UA4427
08:35
Dulles, Washington (IAD)

09:58
Saint Louis (STL) 1
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
United Airlines UA4427
08:40
Dulles, Washington (IAD)

09:56
Saint Louis (STL) 1
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:16, non-stop
Canadair CRJ 550 (CR5)
United Airlines UA4427
08:40
Dulles, Washington (IAD)

09:59
Saint Louis (STL) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:19, non-stop
Canadair CRJ 550 (CR5)
United Airlines UA4527
17:10
Dulles, Washington (IAD)

18:33
Saint Louis (STL) 1
Effective from 2025-08-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
United Airlines UA4527
17:38
Dulles, Washington (IAD)

19:00
Saint Louis (STL) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:22, non-stop
Canadair CRJ 550 (CR5)
United Airlines UA4527
17:55
Dulles, Washington (IAD)

19:23
Saint Louis (STL) 1
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
United Airlines UA4527
17:55
Dulles, Washington (IAD)

19:22
Saint Louis (STL) 1
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:27, non-stop
Canadair CRJ 550 (CR5)
Non-Direct Flights:
United Airlines UA591
15:40
Dulles, Washington (IAD)

21:25
Saint Louis (STL) 1
Effective 2025-06-02 through 2025-06-24
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 6:45, 1-stop
Boeing 737-900 (739)
Direct Codeshare Flights:
Avianca AV2342
17:10
Dulles, Washington (IAD)

18:33
Saint Louis (STL) 1
Effective from 2025-08-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
Avianca AV2342
17:38
Dulles, Washington (IAD)

19:00
Saint Louis (STL) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:22, non-stop
Canadair CRJ 550 (CR5)
Avianca AV2342
17:55
Dulles, Washington (IAD)

19:23
Saint Louis (STL) 1
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
Avianca AV2342
17:55
Dulles, Washington (IAD)

19:22
Saint Louis (STL) 1
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:27, non-stop
Canadair CRJ 550 (CR5)
Avianca AV2344
08:20
Dulles, Washington (IAD)

09:48
Saint Louis (STL) 1
Effective from 2025-08-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
Avianca AV2344
08:35
Dulles, Washington (IAD)

09:58
Saint Louis (STL) 1
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
Avianca AV2344
08:40
Dulles, Washington (IAD)

09:56
Saint Louis (STL) 1
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:16, non-stop
Canadair CRJ 550 (CR5)
Avianca AV2344
08:40
Dulles, Washington (IAD)

09:59
Saint Louis (STL) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:19, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2678
17:10
Dulles, Washington (IAD)

18:33
Saint Louis (STL) 1
Effective 2025-08-19 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2678
17:10
Dulles, Washington (IAD)

18:33
Saint Louis (STL) 1
Effective from 2025-11-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2678
17:38
Dulles, Washington (IAD)

19:00
Saint Louis (STL) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:22, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2678
17:55
Dulles, Washington (IAD)

19:23
Saint Louis (STL) 1
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2678
17:55
Dulles, Washington (IAD)

19:22
Saint Louis (STL) 1
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:27, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2679
08:20
Dulles, Washington (IAD)

09:48
Saint Louis (STL) 1
Effective 2025-08-19 through 2025-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2679
08:20
Dulles, Washington (IAD)

09:48
Saint Louis (STL) 1
Effective 2025-09-10 through 2025-10-06
Mon
Tue
-
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2679
08:20
Dulles, Washington (IAD)

09:48
Saint Louis (STL) 1
Effective from 2025-10-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2679
08:35
Dulles, Washington (IAD)

09:58
Saint Louis (STL) 1
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2679
08:40
Dulles, Washington (IAD)

09:56
Saint Louis (STL) 1
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:16, non-stop
Canadair CRJ 550 (CR5)
Copa Airlines CM2679
08:40
Dulles, Washington (IAD)

09:59
Saint Louis (STL) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4427)
Duration: 2:19, non-stop
Canadair CRJ 550 (CR5)
Brussels Airlines SN9012
17:10
Dulles, Washington (IAD)

18:33
Saint Louis (STL) 1
Effective from 2025-08-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
Brussels Airlines SN9012
17:38
Dulles, Washington (IAD)

19:00
Saint Louis (STL) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:22, non-stop
Canadair CRJ 550 (CR5)
Brussels Airlines SN9012
17:55
Dulles, Washington (IAD)

19:23
Saint Louis (STL) 1
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
Brussels Airlines SN9012
17:55
Dulles, Washington (IAD)

19:22
Saint Louis (STL) 1
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:27, non-stop
Canadair CRJ 550 (CR5)
Lufthansa LH9286
17:10
Dulles, Washington (IAD)

18:33
Saint Louis (STL) 1
Effective 2025-08-19 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
Lufthansa LH9286
17:10
Dulles, Washington (IAD)

18:33
Saint Louis (STL) 1
Effective from 2025-11-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:23, non-stop
Canadair CRJ 550 (CR5)
Lufthansa LH9286
17:38
Dulles, Washington (IAD)

19:00
Saint Louis (STL) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:22, non-stop
Canadair CRJ 550 (CR5)
Lufthansa LH9286
17:55
Dulles, Washington (IAD)

19:23
Saint Louis (STL) 1
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:28, non-stop
Canadair CRJ 550 (CR5)
Lufthansa LH9286
17:55
Dulles, Washington (IAD)

19:22
Saint Louis (STL) 1
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 4527)
Duration: 2:27, non-stop
Canadair CRJ 550 (CR5)
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  • A domestic route departing from the Dulles, Washington airport (IAD) and arriving at Saint Louis airport (STL).
  • The flight distance is 694 miles, or 1117 km.
  • The timezone of the departure airport is UTC-5 , and the timezone of the arrival airport is UTC-6 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
  • For direct flights, the flight time varies between 2:16 and 2:28.
Return (STL-IAD) flights
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