Korean Air flights from Atlanta (ATL) to Buffalo (BUF).

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 12:30 Atlanta (ATL) S 14:30 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:00 Effective 2025-09-08 through 2025-11-05
Codeshare flight, operated by Delta Air Lines.(DL 2266)
Mon-Fri,Sun 13:40 Atlanta (ATL) S 15:42 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:02 Effective 2025-07-07 through 2025-08-29
Codeshare flight, operated by Delta Air Lines.(DL 2266)
Mon-Fri,Sun 13:40 Atlanta (ATL) S 15:42 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:02 Effective 2025-09-01 through 2025-09-07
Codeshare flight, operated by Delta Air Lines.(DL 2266)
Sat 14:00 Atlanta (ATL) S 16:02 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:02 Effective 2025-07-12 through 2025-08-09
Codeshare flight, operated by Delta Air Lines.(DL 2266)
Sat 14:00 Atlanta (ATL) S 16:05 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:05 Effective 2025-08-16 through 2025-08-30
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Sat,Sun 14:00 Atlanta (ATL) S 16:05 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:05 Effective 2025-08-31 through 2025-09-06
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Mon,Tue,Thu-Sun 14:01 Atlanta (ATL) S 16:04 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:03 Effective 2025-06-08 through 2025-07-06
Codeshare flight, operated by Delta Air Lines.(DL 2266)
Wed 14:01 Atlanta (ATL) S 16:04 Buffalo (BUF)
Korean Air KE 3666 Non-stop Boeing 737-900 (739) 2:03 Effective 2025-06-11 through 2025-07-02
Codeshare flight, operated by Delta Air Lines.(DL 2266)
Mon-Fri,Sun 15:29 Atlanta (ATL) S 17:28 Buffalo (BUF)
Korean Air KE 3666 Non-stop Boeing 757 (757) 1:59 Effective 2025-05-07 through 2025-05-19
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Mon-Fri 15:29 Atlanta (ATL) S 17:30 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:01 Effective 2025-05-20 through 2025-05-30
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Mon-Fri,Sun 15:29 Atlanta (ATL) S 17:30 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:01 Effective 2025-06-01 through 2025-06-06
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Daily 15:32 Atlanta (ATL) S 17:33 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:01 Effective 2025-11-06 through 2025-12-19
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Daily 15:32 Atlanta (ATL) S 17:35 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A320 (320) 2:03 Effective from 2026-01-06
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Daily 15:40 Atlanta (ATL) S 17:40 Buffalo (BUF)
Korean Air KE 3666 Non-stop Boeing 737-900 (739) 2:00 Valid until 2025-05-06
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Sat 15:49 Atlanta (ATL) S 17:49 Buffalo (BUF)
Korean Air KE 3666 Non-stop Boeing 757 (757) 2:00 Effective 2025-05-10 through 2025-05-17
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Sat 15:49 Atlanta (ATL) S 17:50 Buffalo (BUF)
Korean Air KE 3666 Non-stop Airbus A321 (321) 2:01 Effective 2025-05-24 through 2025-06-07
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Daily 15:50 Atlanta (ATL) S 17:50 Buffalo (BUF)
Korean Air KE 3666 Non-stop Boeing 737-900 (739) 2:00 Effective 2025-12-20 through 2026-01-05
Codeshare flight, operated by Delta Air Lines.(DL 2050)
Daily 21:42 Atlanta (ATL) S 23:46 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 737-900 (739) 2:04 Effective 2025-06-08 through 2025-06-19
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Daily 21:42 Atlanta (ATL) S 23:46 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 737-900 (739) 2:04 Effective 2025-06-21 through 2025-06-28
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Mon,Sun 21:42 Atlanta (ATL) S 23:47 Buffalo (BUF)
Korean Air KE 6849 Non-stop Airbus A321 (321) 2:05 Effective 2025-06-29 through 2025-06-30
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Tue-Sun 21:42 Atlanta (ATL) S 23:46 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 737-900 (739) 2:04 Effective 2025-07-01 through 2025-07-06
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Fri 21:47 Atlanta (ATL) S 23:51 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 737-900 (739) 2:04 Operates only on 2025-06-20
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Daily 21:52 Atlanta (ATL) S 23:53 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 757 (757) 2:01 Effective 2025-05-07 through 2025-05-18
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Daily 21:52 Atlanta (ATL) S 23:55 Buffalo (BUF)
Korean Air KE 6849 Non-stop Airbus A321 (321) 2:03 Effective 2025-05-19 through 2025-06-06
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Sat 21:53 Atlanta (ATL) S 23:56 Buffalo (BUF)
Korean Air KE 6849 Non-stop Airbus A321 (321) 2:03 Operates only on 2025-06-07
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Daily 21:54 Atlanta (ATL) S 23:59 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 737-900 (739) 2:05 Effective 2025-07-07 through 2025-09-07
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Daily 21:54 Atlanta (ATL) S 23:54 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 737-900 (739) 2:00 Effective 2025-09-08 through 2025-11-05
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Daily 21:54 Atlanta (ATL) S 23:55 Buffalo (BUF)
Korean Air KE 6849 Non-stop Airbus A321 (321) 2:01 Effective 2025-11-06 through 2025-12-19
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Daily 21:54 Atlanta (ATL) S 23:57 Buffalo (BUF)
Korean Air KE 6849 Non-stop Airbus A321 (321) 2:03 Effective from 2026-01-06
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Daily 21:59 Atlanta (ATL) S 23:57 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 737-900 (739) 1:58 Valid until 2025-05-05
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Tue 21:59 Atlanta (ATL) S 23:57 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 757 (757) 1:58 Operates only on 2025-05-06
Codeshare flight, operated by Delta Air Lines.(DL 2334)
Daily 22:40 Atlanta (ATL) S 00:41 Buffalo (BUF)
Korean Air KE 6849 Non-stop Boeing 737-900 (739) 2:01 Effective 2025-12-20 through 2026-01-05
Codeshare flight, operated by Delta Air Lines.(DL 2334)
The flight arrives 1 day after departure.
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Korean Air flights from Atlanta (ATL) to Buffalo (BUF).
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Korean Air KE3666
12:30
Atlanta (ATL) S

14:30
Buffalo (BUF)
Effective 2025-09-08 through 2025-11-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2266)
Duration: 2:00, non-stop
Airbus A321 (321)
Korean Air KE3666
13:40
Atlanta (ATL) S

15:42
Buffalo (BUF)
Effective 2025-07-07 through 2025-08-29
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2266)
Duration: 2:02, non-stop
Airbus A321 (321)
Korean Air KE3666
13:40
Atlanta (ATL) S

15:42
Buffalo (BUF)
Effective 2025-09-01 through 2025-09-07
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2266)
Duration: 2:02, non-stop
Airbus A321 (321)
Korean Air KE3666
14:00
Atlanta (ATL) S

16:02
Buffalo (BUF)
Effective 2025-07-12 through 2025-08-09
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2266)
Duration: 2:02, non-stop
Airbus A321 (321)
Korean Air KE3666
14:00
Atlanta (ATL) S

16:05
Buffalo (BUF)
Effective 2025-08-16 through 2025-08-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:05, non-stop
Airbus A321 (321)
Korean Air KE3666
14:00
Atlanta (ATL) S

16:05
Buffalo (BUF)
Effective 2025-08-31 through 2025-09-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:05, non-stop
Airbus A321 (321)
Korean Air KE3666
14:01
Atlanta (ATL) S

16:04
Buffalo (BUF)
Effective 2025-06-08 through 2025-07-06
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2266)
Duration: 2:03, non-stop
Airbus A321 (321)
Korean Air KE3666
14:01
Atlanta (ATL) S

16:04
Buffalo (BUF)
Effective 2025-06-11 through 2025-07-02
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2266)
Duration: 2:03, non-stop
Boeing 737-900 (739)
Korean Air KE3666
15:29
Atlanta (ATL) S

17:28
Buffalo (BUF)
Effective 2025-05-07 through 2025-05-19
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 1:59, non-stop
Boeing 757 (757)
Korean Air KE3666
15:29
Atlanta (ATL) S

17:30
Buffalo (BUF)
Effective 2025-05-20 through 2025-05-30
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:01, non-stop
Airbus A321 (321)
Korean Air KE3666
15:29
Atlanta (ATL) S

17:30
Buffalo (BUF)
Effective 2025-06-01 through 2025-06-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:01, non-stop
Airbus A321 (321)
Korean Air KE3666
15:32
Atlanta (ATL) S

17:33
Buffalo (BUF)
Effective 2025-11-06 through 2025-12-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:01, non-stop
Airbus A321 (321)
Korean Air KE3666
15:32
Atlanta (ATL) S

17:35
Buffalo (BUF)
Effective from 2026-01-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:03, non-stop
Airbus A320 (320)
Korean Air KE3666
15:40
Atlanta (ATL) S

17:40
Buffalo (BUF)
Valid until 2025-05-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:00, non-stop
Boeing 737-900 (739)
Korean Air KE3666
15:49
Atlanta (ATL) S

17:49
Buffalo (BUF)
Effective 2025-05-10 through 2025-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:00, non-stop
Boeing 757 (757)
Korean Air KE3666
15:49
Atlanta (ATL) S

17:50
Buffalo (BUF)
Effective 2025-05-24 through 2025-06-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:01, non-stop
Airbus A321 (321)
Korean Air KE3666
15:50
Atlanta (ATL) S

17:50
Buffalo (BUF)
Effective 2025-12-20 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2050)
Duration: 2:00, non-stop
Boeing 737-900 (739)
Korean Air KE6849
21:42
Atlanta (ATL) S

23:46
Buffalo (BUF)
Effective 2025-06-08 through 2025-06-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:04, non-stop
Boeing 737-900 (739)
Korean Air KE6849
21:42
Atlanta (ATL) S

23:46
Buffalo (BUF)
Effective 2025-06-21 through 2025-06-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:04, non-stop
Boeing 737-900 (739)
Korean Air KE6849
21:42
Atlanta (ATL) S

23:47
Buffalo (BUF)
Effective 2025-06-29 through 2025-06-30
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:05, non-stop
Airbus A321 (321)
Korean Air KE6849
21:42
Atlanta (ATL) S

23:46
Buffalo (BUF)
Effective 2025-07-01 through 2025-07-06
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:04, non-stop
Boeing 737-900 (739)
Korean Air KE6849
21:47
Atlanta (ATL) S

23:51
Buffalo (BUF)
Operates only on 2025-06-20
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:04, non-stop
Boeing 737-900 (739)
Korean Air KE6849
21:52
Atlanta (ATL) S

23:53
Buffalo (BUF)
Effective 2025-05-07 through 2025-05-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:01, non-stop
Boeing 757 (757)
Korean Air KE6849
21:52
Atlanta (ATL) S

23:55
Buffalo (BUF)
Effective 2025-05-19 through 2025-06-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:03, non-stop
Airbus A321 (321)
Korean Air KE6849
21:53
Atlanta (ATL) S

23:56
Buffalo (BUF)
Operates only on 2025-06-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:03, non-stop
Airbus A321 (321)
Korean Air KE6849
21:54
Atlanta (ATL) S

23:59
Buffalo (BUF)
Effective 2025-07-07 through 2025-09-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:05, non-stop
Boeing 737-900 (739)
Korean Air KE6849
21:54
Atlanta (ATL) S

23:54
Buffalo (BUF)
Effective 2025-09-08 through 2025-11-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:00, non-stop
Boeing 737-900 (739)
Korean Air KE6849
21:54
Atlanta (ATL) S

23:55
Buffalo (BUF)
Effective 2025-11-06 through 2025-12-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:01, non-stop
Airbus A321 (321)
Korean Air KE6849
21:54
Atlanta (ATL) S

23:57
Buffalo (BUF)
Effective from 2026-01-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:03, non-stop
Airbus A321 (321)
Korean Air KE6849
21:59
Atlanta (ATL) S

23:57
Buffalo (BUF)
Valid until 2025-05-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 1:58, non-stop
Boeing 737-900 (739)
Korean Air KE6849
21:59
Atlanta (ATL) S

23:57
Buffalo (BUF)
Operates only on 2025-05-06
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 1:58, non-stop
Boeing 757 (757)
Korean Air KE6849
22:40
Atlanta (ATL) S

00:41(+1)
Buffalo (BUF)
Effective 2025-12-20 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 2334)
Duration: 2:01, non-stop
Boeing 737-900 (739)
The flight arrives 1 day after departure.
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  • A domestic route departing from the Atlanta airport (ATL) and arriving at Buffalo airport (BUF).
  • The flight distance is 712 miles, or 1146 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 1:58 and 2:05.
All ATL-BUF flights
All Korean Air flights
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