Delta Air Lines flight DL 4639: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon-Fri,Sun 07:10 Detroit (DTW) M 08:23 Buffalo (BUF)
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:13 Effective 2026-04-13 through 2026-05-08
Daily 07:10 Detroit (DTW) M 08:23 Buffalo (BUF)
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:13 Effective 2026-05-09 through 2026-10-05
Daily 07:10 Detroit (DTW) M 08:29 Buffalo (BUF)
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:19 Effective from 2026-10-06
Mon,Thu,Fri,Sun 08:30 Detroit (DTW) M 09:53 Buffalo (BUF)
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:23 Effective 2026-01-19 through 2026-02-06
Mon 08:30 Detroit (DTW) M 09:53 Buffalo (BUF)
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:23 Operates only on 2026-02-09
Mon-Fri,Sun 09:00 Buffalo (BUF) 10:14 Detroit (DTW) M
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:14 Effective 2026-04-13 through 2026-05-08
Daily 09:00 Buffalo (BUF) 10:14 Detroit (DTW) M
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:14 Effective 2026-05-09 through 2026-10-05
Daily 09:00 Buffalo (BUF) 10:18 Detroit (DTW) M
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:18 Effective from 2026-10-06
Mon,Thu,Fri,Sun 10:33 Buffalo (BUF) 11:58 Detroit (DTW) M
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:25 Effective 2026-01-19 through 2026-02-06
Mon 10:33 Buffalo (BUF) 11:58 Detroit (DTW) M
DL 4639 Non-stop Canadair CRJ 900 (CR9) 1:25 Operates only on 2026-02-09
This flight number is listed as serving the following routes:


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Delta Air Lines flight DL 4639: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL4639
07:10
Detroit (DTW) M

08:23
Buffalo (BUF)
Effective 2026-04-13 through 2026-05-08
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:13, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL4639
07:10
Detroit (DTW) M

08:23
Buffalo (BUF)
Effective 2026-05-09 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:13, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL4639
07:10
Detroit (DTW) M

08:29
Buffalo (BUF)
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:19, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL4639
08:30
Detroit (DTW) M

09:53
Buffalo (BUF)
Effective 2026-01-19 through 2026-02-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:23, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL4639
08:30
Detroit (DTW) M

09:53
Buffalo (BUF)
Operates only on 2026-02-09
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:23, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL4639
09:00
Buffalo (BUF)

10:14
Detroit (DTW) M
Effective 2026-04-13 through 2026-05-08
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:14, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL4639
09:00
Buffalo (BUF)

10:14
Detroit (DTW) M
Effective 2026-05-09 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:14, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL4639
09:00
Buffalo (BUF)

10:18
Detroit (DTW) M
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:18, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL4639
10:33
Buffalo (BUF)

11:58
Detroit (DTW) M
Effective 2026-01-19 through 2026-02-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:25, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL4639
10:33
Buffalo (BUF)

11:58
Detroit (DTW) M
Operates only on 2026-02-09
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Canadair CRJ 900 (CR9)
This flight number is listed as serving the following routes:
  • Detroit (DTW) - Buffalo (BUF)
All Delta Air Lines flights
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