Delta Air Lines flight DL 3997: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 06:15 Seattle-Tacoma (SEA) 08:28 San Francisco (SFO) 1
DL 3997 Non-stop Embraer EMB 175 (E7W) 2:13 Effective 2025-05-07 through 2025-06-07
Daily 10:00 San Francisco (SFO) 1 12:18 Seattle-Tacoma (SEA)
DL 3997 Non-stop Embraer EMB 175 (E7W) 2:18 Effective 2025-05-07 through 2025-06-07
Daily 12:45 Minneapolis/Saint Paul (MSP) 1 13:52 Madison (MSN)
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:07 Effective 2025-12-20 through 2026-01-05
Daily 14:40 Madison (MSN) 15:53 Minneapolis/Saint Paul (MSP) 1
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:13 Effective 2025-12-20 through 2026-01-05
Fri 17:30 Seattle-Tacoma (SEA) 18:35 Portland (PDX)
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:05 Operates only on 2025-07-04
Daily 19:45 Seattle-Tacoma (SEA) 20:49 Portland (PDX)
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:04 Valid until 2025-05-06
Mon-Fri,Sun 19:45 Seattle-Tacoma (SEA) 20:46 Portland (PDX)
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:01 Effective 2025-07-07 through 2025-08-15
Daily 19:45 Seattle-Tacoma (SEA) 20:46 Portland (PDX)
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:01 Effective 2025-08-16 through 2025-09-07
Daily 19:45 Seattle-Tacoma (SEA) 20:49 Portland (PDX)
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:04 Effective 2025-09-08 through 2025-12-19
Daily 19:45 Seattle-Tacoma (SEA) 20:47 Portland (PDX)
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:02 Effective from 2026-01-06
Mon-Fri,Sun 19:55 Seattle-Tacoma (SEA) 21:00 Portland (PDX)
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:05 Effective 2025-06-08 through 2025-07-03
Sun 19:55 Seattle-Tacoma (SEA) 21:00 Portland (PDX)
DL 3997 Non-stop Embraer EMB 175 (E7W) 1:05 Operates only on 2025-07-06
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This flight number is listed as serving the following routes:


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Delta Air Lines flight DL 3997: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL3997
06:15
Seattle-Tacoma (SEA)

08:28
San Francisco (SFO) 1
Effective 2025-05-07 through 2025-06-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:13, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
10:00
San Francisco (SFO) 1

12:18
Seattle-Tacoma (SEA)
Effective 2025-05-07 through 2025-06-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:18, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
12:45
Minneapolis/Saint Paul (MSP) 1

13:52
Madison (MSN)
Effective 2025-12-20 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:07, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
14:40
Madison (MSN)

15:53
Minneapolis/Saint Paul (MSP) 1
Effective 2025-12-20 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:13, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
17:30
Seattle-Tacoma (SEA)

18:35
Portland (PDX)
Operates only on 2025-07-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:05, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
19:45
Seattle-Tacoma (SEA)

20:49
Portland (PDX)
Valid until 2025-05-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:04, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
19:45
Seattle-Tacoma (SEA)

20:46
Portland (PDX)
Effective 2025-07-07 through 2025-08-15
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:01, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
19:45
Seattle-Tacoma (SEA)

20:46
Portland (PDX)
Effective 2025-08-16 through 2025-09-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:01, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
19:45
Seattle-Tacoma (SEA)

20:49
Portland (PDX)
Effective 2025-09-08 through 2025-12-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:04, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
19:45
Seattle-Tacoma (SEA)

20:47
Portland (PDX)
Effective from 2026-01-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:02, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
19:55
Seattle-Tacoma (SEA)

21:00
Portland (PDX)
Effective 2025-06-08 through 2025-07-03
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:05, non-stop
Embraer EMB 175 (E7W)
Delta Air Lines DL3997
19:55
Seattle-Tacoma (SEA)

21:00
Portland (PDX)
Operates only on 2025-07-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:05, non-stop
Embraer EMB 175 (E7W)
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This flight number is listed as serving the following routes:
  • Minneapolis/Saint Paul (MSP) - Madison (MSN)
  • San Francisco (SFO) - Seattle-Tacoma (SEA)
  • Seattle-Tacoma (SEA) - Portland (PDX)
All Delta Air Lines flights
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