KLM flight KL 5721: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon,Thu 06:00 Saint Louis (STL) 1 08:45 Atlanta (ATL) S
KL 5721 Non-stop Boeing 737-800 (738) 1:45 Effective 2026-01-08 through 2026-02-05
Codeshare flight, operated by Delta Air Lines.(DL 1524)
Mon 06:00 Saint Louis (STL) 1 08:45 Atlanta (ATL) S
KL 5721 Non-stop Boeing 737-900 (739) 1:45 Operates only on 2026-02-09
Codeshare flight, operated by Delta Air Lines.(DL 1524)
Mon,Thu 06:00 Saint Louis (STL) 1 08:45 Atlanta (ATL) S
KL 5721 Non-stop Boeing 737-800 (738) 1:45 Effective 2026-02-12 through 2026-03-05
Codeshare flight, operated by Delta Air Lines.(DL 1524)
Sat 06:00 Saint Louis (STL) 1 08:41 Atlanta (ATL) S
KL 5721 Non-stop Airbus A321 (321) 1:41 Operates only on 2026-03-28
Codeshare flight, operated by Delta Air Lines.(DL 1524)
Daily 10:00 Memphis (MEM) 12:54 Detroit (DTW) M
KL 5721 Non-stop Canadair CRJ 900 (CR9) 1:54 Effective from 2026-10-25
Codeshare flight, operated by Delta Air Lines.(DL 5300)
Wed,Fri,Sun 11:55 Saint Louis (STL) 1 14:29 Atlanta (ATL) S
KL 5721 Non-stop Boeing 717 (717) 1:34 Effective 2026-02-13 through 2026-03-06
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Mon 12:00 Saint Louis (STL) 1 14:35 Atlanta (ATL) S
KL 5721 Non-stop Boeing 737-900 (739) 1:35 Operates only on 2026-01-05
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Wed,Sun 12:00 Saint Louis (STL) 1 14:35 Atlanta (ATL) S
KL 5721 Non-stop Boeing 737-800 (738) 1:35 Effective 2026-01-07 through 2026-01-14
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Fri 12:00 Saint Louis (STL) 1 14:36 Atlanta (ATL) S
KL 5721 Non-stop Airbus A320 (320) 1:36 Operates only on 2026-01-09
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Fri,Sun 12:00 Saint Louis (STL) 1 14:35 Atlanta (ATL) S
KL 5721 Non-stop Boeing 737-800 (738) 1:35 Effective 2026-01-16 through 2026-01-18
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Fri,Sun 12:00 Saint Louis (STL) 1 14:36 Atlanta (ATL) S
KL 5721 Non-stop Boeing 717 (717) 1:36 Effective 2026-01-23 through 2026-02-06
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Fri,Sun 12:22 Saint Louis (STL) 1 14:56 Atlanta (ATL) S
KL 5721 Non-stop Boeing 717 (717) 1:34 Effective 2026-03-08 through 2026-03-27
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Wed 13:00 Saint Louis (STL) 1 15:35 Atlanta (ATL) S
KL 5721 Non-stop Boeing 717 (717) 1:35 Effective 2026-01-21 through 2026-02-04
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Wed,Sun 13:00 Saint Louis (STL) 1 15:35 Atlanta (ATL) S
KL 5721 Non-stop Boeing 717 (717) 1:35 Effective 2026-02-08 through 2026-02-11
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Wed 13:00 Saint Louis (STL) 1 15:38 Atlanta (ATL) S
KL 5721 Non-stop Boeing 717 (717) 1:38 Effective 2026-03-11 through 2026-03-25
Codeshare flight, operated by Delta Air Lines.(DL 1400)
Sat 17:00 Saint Louis (STL) 1 19:44 Atlanta (ATL) S
KL 5721 Non-stop Boeing 737-900 (739) 1:44 Effective 2026-02-14 through 2026-03-07
Codeshare flight, operated by Delta Air Lines.(DL 1604)
Tue 17:00 Saint Louis (STL) 1 19:44 Atlanta (ATL) S
KL 5721 Non-stop Boeing 737-800 (738) 1:44 Effective 2026-02-17 through 2026-03-03
Codeshare flight, operated by Delta Air Lines.(DL 1604)
Mon-Fri,Sun 19:45 Detroit (DTW) M 20:40 Des Moines (DSM)
KL 5721 Non-stop Canadair CRJ 900 (CR9) 1:55 Effective 2026-03-29 through 2026-04-12
Codeshare flight, operated by Delta Air Lines.(DL 5087)
Mon-Fri,Sun 19:55 Detroit (DTW) M 20:45 Des Moines (DSM)
KL 5721 Non-stop Canadair CRJ 900 (CR9) 1:50 Effective 2026-04-13 through 2026-05-22
Codeshare flight, operated by Delta Air Lines.(DL 5087)
Mon-Fri,Sun 19:55 Detroit (DTW) M 20:45 Des Moines (DSM)
KL 5721 Non-stop Canadair CRJ 900 (CR9) 1:50 Effective 2026-05-25 through 2026-06-12
Codeshare flight, operated by Delta Air Lines.(DL 5087)
Daily 19:55 Detroit (DTW) M 20:45 Des Moines (DSM)
KL 5721 Non-stop Canadair CRJ 900 (CR9) 1:50 Effective 2026-06-13 through 2026-10-05
Codeshare flight, operated by Delta Air Lines.(DL 5087)
Daily 19:55 Detroit (DTW) M 20:52 Des Moines (DSM)
KL 5721 Non-stop Canadair CRJ 900 (CR9) 1:57 Effective 2026-10-06 through 2026-10-24
Codeshare flight, operated by Delta Air Lines.(DL 5087)
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This flight number is listed as serving the following routes:


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KLM flight KL 5721: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
KLM KL5721
06:00
Saint Louis (STL) 1

08:45
Atlanta (ATL) S
Effective 2026-01-08 through 2026-02-05
Mon
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1524)
Duration: 1:45, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
KLM KL5721
06:00
Saint Louis (STL) 1

08:45
Atlanta (ATL) S
Operates only on 2026-02-09
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1524)
Duration: 1:45, non-stop
Boeing 737-900 (739)
Direct Codeshare Flights:
KLM KL5721
06:00
Saint Louis (STL) 1

08:45
Atlanta (ATL) S
Effective 2026-02-12 through 2026-03-05
Mon
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1524)
Duration: 1:45, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
KLM KL5721
06:00
Saint Louis (STL) 1

08:41
Atlanta (ATL) S
Operates only on 2026-03-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1524)
Duration: 1:41, non-stop
Airbus A321 (321)
Direct Codeshare Flights:
KLM KL5721
10:00
Memphis (MEM)

12:54
Detroit (DTW) M
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 5300)
Duration: 1:54, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
KLM KL5721
11:55
Saint Louis (STL) 1

14:29
Atlanta (ATL) S
Effective 2026-02-13 through 2026-03-06
Mon
-
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:34, non-stop
Boeing 717 (717)
Direct Codeshare Flights:
KLM KL5721
12:00
Saint Louis (STL) 1

14:35
Atlanta (ATL) S
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:35, non-stop
Boeing 737-900 (739)
Direct Codeshare Flights:
KLM KL5721
12:00
Saint Louis (STL) 1

14:35
Atlanta (ATL) S
Effective 2026-01-07 through 2026-01-14
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:35, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
KLM KL5721
12:00
Saint Louis (STL) 1

14:36
Atlanta (ATL) S
Operates only on 2026-01-09
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:36, non-stop
Airbus A320 (320)
Direct Codeshare Flights:
KLM KL5721
12:00
Saint Louis (STL) 1

14:35
Atlanta (ATL) S
Effective 2026-01-16 through 2026-01-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:35, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
KLM KL5721
12:00
Saint Louis (STL) 1

14:36
Atlanta (ATL) S
Effective 2026-01-23 through 2026-02-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:36, non-stop
Boeing 717 (717)
Direct Codeshare Flights:
KLM KL5721
12:22
Saint Louis (STL) 1

14:56
Atlanta (ATL) S
Effective 2026-03-08 through 2026-03-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:34, non-stop
Boeing 717 (717)
Direct Codeshare Flights:
KLM KL5721
13:00
Saint Louis (STL) 1

15:35
Atlanta (ATL) S
Effective 2026-01-21 through 2026-02-04
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:35, non-stop
Boeing 717 (717)
Direct Codeshare Flights:
KLM KL5721
13:00
Saint Louis (STL) 1

15:35
Atlanta (ATL) S
Effective 2026-02-08 through 2026-02-11
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:35, non-stop
Boeing 717 (717)
Direct Codeshare Flights:
KLM KL5721
13:00
Saint Louis (STL) 1

15:38
Atlanta (ATL) S
Effective 2026-03-11 through 2026-03-25
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1400)
Duration: 1:38, non-stop
Boeing 717 (717)
Direct Codeshare Flights:
KLM KL5721
17:00
Saint Louis (STL) 1

19:44
Atlanta (ATL) S
Effective 2026-02-14 through 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1604)
Duration: 1:44, non-stop
Boeing 737-900 (739)
Direct Codeshare Flights:
KLM KL5721
17:00
Saint Louis (STL) 1

19:44
Atlanta (ATL) S
Effective 2026-02-17 through 2026-03-03
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1604)
Duration: 1:44, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
KLM KL5721
19:45
Detroit (DTW) M

20:40
Des Moines (DSM)
Effective 2026-03-29 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 5087)
Duration: 1:55, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
KLM KL5721
19:55
Detroit (DTW) M

20:45
Des Moines (DSM)
Effective 2026-04-13 through 2026-05-22
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 5087)
Duration: 1:50, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
KLM KL5721
19:55
Detroit (DTW) M

20:45
Des Moines (DSM)
Effective 2026-05-25 through 2026-06-12
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 5087)
Duration: 1:50, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
KLM KL5721
19:55
Detroit (DTW) M

20:45
Des Moines (DSM)
Effective 2026-06-13 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 5087)
Duration: 1:50, non-stop
Canadair CRJ 900 (CR9)
Direct Codeshare Flights:
KLM KL5721
19:55
Detroit (DTW) M

20:52
Des Moines (DSM)
Effective 2026-10-06 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 5087)
Duration: 1:57, non-stop
Canadair CRJ 900 (CR9)
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Parallax here -
This flight number is listed as serving the following routes:
  • Detroit (DTW) - Des Moines (DSM)
  • Memphis (MEM) - Detroit (DTW)
  • Saint Louis (STL) - Atlanta (ATL)
All KLM flights
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