Korean Air flight KE 3721: Louisville - Atlanta

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Sat 14:37 Louisville (SDF) 16:02 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:25 Operates only on 2025-05-03
Codeshare flight, operated by Delta Air Lines.(DL 3165)
Sat 14:59 Louisville (SDF) 16:26 Atlanta (ATL) S
KE 3721 Non-stop Boeing 717 (717) 1:27 Effective 2025-05-24 through 2025-06-07
Codeshare flight, operated by Delta Air Lines.(DL 3165)
Sun 14:59 Louisville (SDF) 16:24 Atlanta (ATL) S
KE 3721 Non-stop Boeing 717 (717) 1:25 Operates only on 2025-05-25
Codeshare flight, operated by Delta Air Lines.(DL 3165)
Sat 14:59 Louisville (SDF) 16:27 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:28 Effective 2025-07-12 through 2025-08-09
Codeshare flight, operated by Delta Air Lines.(DL 2451)
Tue,Wed,Sat 14:59 Louisville (SDF) 16:27 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:28 Effective 2025-08-12 through 2025-08-30
Codeshare flight, operated by Delta Air Lines.(DL 2451)
Tue,Wed,Sat,Sun 14:59 Louisville (SDF) 16:27 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:28 Effective 2025-08-31 through 2025-09-06
Codeshare flight, operated by Delta Air Lines.(DL 2451)
Sat 15:20 Louisville (SDF) 16:55 Atlanta (ATL) S
KE 3721 Non-stop Boeing 717 (717) 1:35 Effective 2025-06-14 through 2025-07-05
Codeshare flight, operated by Delta Air Lines.(DL 2451)
Tue 15:23 Louisville (SDF) 16:58 Atlanta (ATL) S
KE 3721 Non-stop Boeing 717 (717) 1:35 Operates only on 2025-07-01
Codeshare flight, operated by Delta Air Lines.(DL 2451)
Mon,Wed-Fri,Sun 15:24 Louisville (SDF) 16:54 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:30 Effective 2025-06-29 through 2025-07-04
Codeshare flight, operated by Delta Air Lines.(DL 2451)
Sat 15:31 Louisville (SDF) 16:57 Atlanta (ATL) S
KE 3721 Non-stop Airbus A319 (319) 1:26 Effective 2025-05-10 through 2025-05-17
Codeshare flight, operated by Delta Air Lines.(DL 3165)
Daily 18:29 Louisville (SDF) 20:02 Atlanta (ATL) S
KE 3721 Non-stop Boeing 717 (717) 1:33 Effective 2025-12-20 through 2026-01-05
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Mon-Wed 19:00 Louisville (SDF) 20:35 Atlanta (ATL) S
KE 3721 Non-stop Airbus A319 (319) 1:35 Valid until 2025-05-06
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Thu 19:20 Louisville (SDF) 20:55 Atlanta (ATL) S
KE 3721 Non-stop Airbus A319 (319) 1:35 Operates only on 2025-05-01
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Mon-Fri,Sun 19:30 Louisville (SDF) 21:06 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:36 Effective 2025-07-07 through 2025-08-11
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Mon,Thu,Fri,Sun 19:30 Louisville (SDF) 21:06 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:36 Effective 2025-08-14 through 2025-08-29
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Mon,Thu,Fri,Sun 19:30 Louisville (SDF) 21:06 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:36 Effective 2025-09-01 through 2025-09-07
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Daily 19:30 Louisville (SDF) 21:04 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:34 Effective 2025-09-08 through 2025-12-19
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Daily 19:30 Louisville (SDF) 21:05 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-900 (739) 1:35 Effective from 2026-01-06
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Fri,Sun 19:59 Louisville (SDF) 21:37 Atlanta (ATL) S
KE 3721 Non-stop Boeing 717 (717) 1:38 Valid until 2025-05-04
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Mon-Fri,Sun 19:59 Louisville (SDF) 21:34 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-800 (738) 1:35 Effective 2025-06-08 through 2025-06-27
Codeshare flight, operated by Delta Air Lines.(DL 1292)
Sun 19:59 Louisville (SDF) 21:34 Atlanta (ATL) S
KE 3721 Non-stop Boeing 737-800 (738) 1:35 Operates only on 2025-07-06
Codeshare flight, operated by Delta Air Lines.(DL 1292)
Tue,Wed 20:00 Louisville (SDF) 21:39 Atlanta (ATL) S
KE 3721 Non-stop Airbus A320 (320) 1:39 Effective 2025-05-13 through 2025-05-21
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Mon-Fri 20:00 Louisville (SDF) 21:39 Atlanta (ATL) S
KE 3721 Non-stop Airbus A320 (320) 1:39 Effective 2025-05-22 through 2025-05-30
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Mon-Fri,Sun 20:00 Louisville (SDF) 21:39 Atlanta (ATL) S
KE 3721 Non-stop Airbus A320 (320) 1:39 Effective 2025-06-01 through 2025-06-06
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Mon,Wed-Fri,Sun 20:10 Louisville (SDF) 21:49 Atlanta (ATL) S
KE 3721 Non-stop Airbus A321 (321) 1:39 Effective 2025-05-07 through 2025-05-12
Codeshare flight, operated by Delta Air Lines.(DL 2831)
Mon,Thu,Fri,Sun 20:10 Louisville (SDF) 21:49 Atlanta (ATL) S
KE 3721 Non-stop Airbus A321 (321) 1:39 Effective 2025-05-15 through 2025-05-19
Codeshare flight, operated by Delta Air Lines.(DL 2831)
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Korean Air flight KE 3721:
Louisville - Atlanta
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Korean Air KE3721
14:37
Louisville (SDF)

16:02
Atlanta (ATL) S
Operates only on 2025-05-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 3165)
Duration: 1:25, non-stop
Boeing 737-900 (739)
Korean Air KE3721
14:59
Louisville (SDF)

16:26
Atlanta (ATL) S
Effective 2025-05-24 through 2025-06-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 3165)
Duration: 1:27, non-stop
Boeing 717 (717)
Korean Air KE3721
14:59
Louisville (SDF)

16:24
Atlanta (ATL) S
Operates only on 2025-05-25
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 3165)
Duration: 1:25, non-stop
Boeing 717 (717)
Korean Air KE3721
14:59
Louisville (SDF)

16:27
Atlanta (ATL) S
Effective 2025-07-12 through 2025-08-09
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2451)
Duration: 1:28, non-stop
Boeing 737-900 (739)
Korean Air KE3721
14:59
Louisville (SDF)

16:27
Atlanta (ATL) S
Effective 2025-08-12 through 2025-08-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2451)
Duration: 1:28, non-stop
Boeing 737-900 (739)
Korean Air KE3721
14:59
Louisville (SDF)

16:27
Atlanta (ATL) S
Effective 2025-08-31 through 2025-09-06
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2451)
Duration: 1:28, non-stop
Boeing 737-900 (739)
Korean Air KE3721
15:20
Louisville (SDF)

16:55
Atlanta (ATL) S
Effective 2025-06-14 through 2025-07-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2451)
Duration: 1:35, non-stop
Boeing 717 (717)
Korean Air KE3721
15:23
Louisville (SDF)

16:58
Atlanta (ATL) S
Operates only on 2025-07-01
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2451)
Duration: 1:35, non-stop
Boeing 717 (717)
Korean Air KE3721
15:24
Louisville (SDF)

16:54
Atlanta (ATL) S
Effective 2025-06-29 through 2025-07-04
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2451)
Duration: 1:30, non-stop
Boeing 737-900 (739)
Korean Air KE3721
15:31
Louisville (SDF)

16:57
Atlanta (ATL) S
Effective 2025-05-10 through 2025-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 3165)
Duration: 1:26, non-stop
Airbus A319 (319)
Korean Air KE3721
18:29
Louisville (SDF)

20:02
Atlanta (ATL) S
Effective 2025-12-20 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:33, non-stop
Boeing 717 (717)
Korean Air KE3721
19:00
Louisville (SDF)

20:35
Atlanta (ATL) S
Valid until 2025-05-06
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:35, non-stop
Airbus A319 (319)
Korean Air KE3721
19:20
Louisville (SDF)

20:55
Atlanta (ATL) S
Operates only on 2025-05-01
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:35, non-stop
Airbus A319 (319)
Korean Air KE3721
19:30
Louisville (SDF)

21:06
Atlanta (ATL) S
Effective 2025-07-07 through 2025-08-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:36, non-stop
Boeing 737-900 (739)
Korean Air KE3721
19:30
Louisville (SDF)

21:06
Atlanta (ATL) S
Effective 2025-08-14 through 2025-08-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:36, non-stop
Boeing 737-900 (739)
Korean Air KE3721
19:30
Louisville (SDF)

21:06
Atlanta (ATL) S
Effective 2025-09-01 through 2025-09-07
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:36, non-stop
Boeing 737-900 (739)
Korean Air KE3721
19:30
Louisville (SDF)

21:04
Atlanta (ATL) S
Effective 2025-09-08 through 2025-12-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:34, non-stop
Boeing 737-900 (739)
Korean Air KE3721
19:30
Louisville (SDF)

21:05
Atlanta (ATL) S
Effective from 2026-01-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:35, non-stop
Boeing 737-900 (739)
Korean Air KE3721
19:59
Louisville (SDF)

21:37
Atlanta (ATL) S
Valid until 2025-05-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:38, non-stop
Boeing 717 (717)
Korean Air KE3721
19:59
Louisville (SDF)

21:34
Atlanta (ATL) S
Effective 2025-06-08 through 2025-06-27
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1292)
Duration: 1:35, non-stop
Boeing 737-800 (738)
Korean Air KE3721
19:59
Louisville (SDF)

21:34
Atlanta (ATL) S
Operates only on 2025-07-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1292)
Duration: 1:35, non-stop
Boeing 737-800 (738)
Korean Air KE3721
20:00
Louisville (SDF)

21:39
Atlanta (ATL) S
Effective 2025-05-13 through 2025-05-21
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:39, non-stop
Airbus A320 (320)
Korean Air KE3721
20:00
Louisville (SDF)

21:39
Atlanta (ATL) S
Effective 2025-05-22 through 2025-05-30
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:39, non-stop
Airbus A320 (320)
Korean Air KE3721
20:00
Louisville (SDF)

21:39
Atlanta (ATL) S
Effective 2025-06-01 through 2025-06-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:39, non-stop
Airbus A320 (320)
Korean Air KE3721
20:10
Louisville (SDF)

21:49
Atlanta (ATL) S
Effective 2025-05-07 through 2025-05-12
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:39, non-stop
Airbus A321 (321)
Korean Air KE3721
20:10
Louisville (SDF)

21:49
Atlanta (ATL) S
Effective 2025-05-15 through 2025-05-19
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2831)
Duration: 1:39, non-stop
Airbus A321 (321)
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  • KE 3721 is a domestic flight departing from the Louisville airport (SDF) and arriving at Atlanta airport (ATL).
  • The flight distance is 322 miles, or 518 km.
  • The timezone of both the departure and the arrival airports is UTC-5 . Current time at both airports is (loading...).
  • For direct flights, the flight time varies between 1:25 and 1:39.
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