Delta Air Lines flight DL 3978: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 09:00 Minneapolis/Saint Paul (MSP) 1 12:03 Louisville (SDF)
DL 3978 Non-stop Embraer EMB 175 (E7W) 2:03 Effective 2026-05-07 through 2026-10-05
Daily 09:00 Minneapolis/Saint Paul (MSP) 1 12:07 Louisville (SDF)
DL 3978 Non-stop Embraer EMB 175 (E7W) 2:07 Effective from 2026-10-06
Mon-Fri,Sun 12:45 Minneapolis/Saint Paul (MSP) 1 15:48 Louisville (SDF)
DL 3978 Non-stop Embraer EMB 175 (E7W) 2:03 Effective 2026-04-13 through 2026-05-06
Mon-Fri,Sun 12:48 Minneapolis/Saint Paul (MSP) 1 15:46 Louisville (SDF)
DL 3978 Non-stop Embraer EMB 175 (E7W) 1:58 Effective 2026-03-08 through 2026-04-12
Mon-Fri 13:11 Minneapolis/Saint Paul (MSP) 1 16:19 Louisville (SDF)
DL 3978 Non-stop Canadair CRJ 900 (CR9) 2:08 Effective 2026-01-19 through 2026-02-11
Daily 13:20 Louisville (SDF) 14:30 Minneapolis/Saint Paul (MSP) 1
DL 3978 Non-stop Embraer EMB 175 (E7W) 2:10 Effective 2026-05-07 through 2026-10-05
Daily 13:20 Louisville (SDF) 14:35 Minneapolis/Saint Paul (MSP) 1
DL 3978 Non-stop Embraer EMB 175 (E7W) 2:15 Effective from 2026-10-06
Mon-Fri,Sun 16:15 Louisville (SDF) 17:25 Minneapolis/Saint Paul (MSP) 1
DL 3978 Non-stop Embraer EMB 175 (E7W) 2:10 Effective 2026-04-13 through 2026-05-06
Daily 16:18 Salt Lake City (SLC) 17:39 Boise (BOI)
DL 3978 Non-stop Embraer EMB 175 (E7W) 1:21 Valid until 2026-01-04
Mon-Fri,Sun 16:26 Louisville (SDF) 17:41 Minneapolis/Saint Paul (MSP) 1
DL 3978 Non-stop Embraer EMB 175 (E7W) 2:15 Effective 2026-03-08 through 2026-04-12
Mon-Fri 16:59 Louisville (SDF) 18:15 Minneapolis/Saint Paul (MSP) 1
DL 3978 Non-stop Canadair CRJ 900 (CR9) 2:16 Effective 2026-01-19 through 2026-01-30
Mon-Fri 17:04 Louisville (SDF) 18:23 Minneapolis/Saint Paul (MSP) 1
DL 3978 Non-stop Canadair CRJ 900 (CR9) 2:19 Effective 2026-02-02 through 2026-02-11
Daily 18:19 Boise (BOI) 19:42 Salt Lake City (SLC)
DL 3978 Non-stop Embraer EMB 175 (E7W) 1:23 Valid until 2026-01-04
This flight number is listed as serving the following routes:


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Delta Air Lines flight DL 3978: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL3978
09:00
Minneapolis/Saint Paul (MSP) 1

12:03
Louisville (SDF)
Effective 2026-05-07 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:03, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3978
09:00
Minneapolis/Saint Paul (MSP) 1

12:07
Louisville (SDF)
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:07, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3978
12:45
Minneapolis/Saint Paul (MSP) 1

15:48
Louisville (SDF)
Effective 2026-04-13 through 2026-05-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:03, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3978
12:48
Minneapolis/Saint Paul (MSP) 1

15:46
Louisville (SDF)
Effective 2026-03-08 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:58, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3978
13:11
Minneapolis/Saint Paul (MSP) 1

16:19
Louisville (SDF)
Effective 2026-01-19 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:08, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL3978
13:20
Louisville (SDF)

14:30
Minneapolis/Saint Paul (MSP) 1
Effective 2026-05-07 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:10, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3978
13:20
Louisville (SDF)

14:35
Minneapolis/Saint Paul (MSP) 1
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3978
16:15
Louisville (SDF)

17:25
Minneapolis/Saint Paul (MSP) 1
Effective 2026-04-13 through 2026-05-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:10, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3978
16:18
Salt Lake City (SLC)

17:39
Boise (BOI)
Valid until 2026-01-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:21, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3978
16:26
Louisville (SDF)

17:41
Minneapolis/Saint Paul (MSP) 1
Effective 2026-03-08 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3978
16:59
Louisville (SDF)

18:15
Minneapolis/Saint Paul (MSP) 1
Effective 2026-01-19 through 2026-01-30
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:16, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL3978
17:04
Louisville (SDF)

18:23
Minneapolis/Saint Paul (MSP) 1
Effective 2026-02-02 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:19, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL3978
18:19
Boise (BOI)

19:42
Salt Lake City (SLC)
Valid until 2026-01-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:23, non-stop
Embraer EMB 175 (E7W)
This flight number is listed as serving the following routes:
  • Louisville (SDF) - Minneapolis/Saint Paul (MSP)
  • Salt Lake City (SLC) - Boise (BOI)
All Delta Air Lines flights
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