Delta Air Lines
flight
DL 3991:
Multiple routes
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL3991
Effective 2026-02-12 through 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:51, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Valid until 2026-01-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:32, non-stop
Canadair CRJ 900 (CR9)
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-01-20 through 2026-02-04
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 2:19, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-02-10 through 2026-02-11
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:19, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-03-08 through 2026-03-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-03-15 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:16, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-02-07 through 2026-02-08
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-01-19 through 2026-01-30
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
Duration: 2:18, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-02-01 through 2026-02-06
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
Sat
-
-
Sun
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-02-02 through 2026-02-09
Mon
Tue
-
-
Wed
-
-
Thu
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-04-13 through 2026-05-06
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-05-07 through 2026-05-22
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-05-25 through 2026-09-04
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-09-07 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 2:15, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 2:22, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-01-24 through 2026-01-31
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 2:16, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-01-20 through 2026-02-11
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:20, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-03-08 through 2026-03-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:17, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-03-15 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:19, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-02-07 through 2026-02-08
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
Duration: 2:19, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-01-19 through 2026-02-06
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
Duration: 2:19, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Operates only on 2026-02-09
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:19, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-04-13 through 2026-05-22
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 2:20, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-05-25 through 2026-09-04
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 2:20, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective 2026-09-07 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 2:20, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3991
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Duration: 2:21, non-stop
Embraer EMB 175 (E7W)
Embraer EMB 175 (E7W)
This flight number is listed as serving the following routes:
- Omaha (OMA) - Minneapolis/Saint Paul (MSP)
- Rapid City (RAP) - Minneapolis/Saint Paul (MSP)
- Seattle-Tacoma (SEA) - San Francisco (SFO)