Delta Air Lines flight DL 4031: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Daily 11:15 Seattle-Tacoma (SEA) 13:56 Ontario, Los Angeles (ONT) 2
DL 4031 Non-stop Embraer EMB 175 (E7W) 2:41 Effective 2026-01-05 through 2026-02-11
Daily 11:15 Seattle-Tacoma (SEA) 13:54 Ontario, Los Angeles (ONT) 2
DL 4031 Non-stop Embraer EMB 175 (E7W) 2:39 Effective 2026-02-12 through 2026-03-07
Daily 14:30 Seattle-Tacoma (SEA) 17:12 Ontario, Los Angeles (ONT) 2
DL 4031 Non-stop Embraer EMB 175 (E7W) 2:42 Effective 2026-03-08 through 2026-03-14
Daily 14:30 Seattle-Tacoma (SEA) 17:13 Ontario, Los Angeles (ONT) 2
DL 4031 Non-stop Embraer EMB 175 (E7W) 2:43 Effective 2026-03-15 through 2026-04-12
Daily 14:35 Seattle-Tacoma (SEA) 17:16 Ontario, Los Angeles (ONT) 2
DL 4031 Non-stop Embraer EMB 175 (E7W) 2:41 Effective 2026-04-13 through 2026-10-05
Daily 14:35 Seattle-Tacoma (SEA) 17:17 Ontario, Los Angeles (ONT) 2
DL 4031 Non-stop Embraer EMB 175 (E7W) 2:42 Effective from 2026-10-06
Daily 15:30 Ontario, Los Angeles (ONT) 2 18:35 Seattle-Tacoma (SEA)
DL 4031 Non-stop Embraer EMB 175 (E7W) 3:05 Effective 2026-01-05 through 2026-02-11
Daily 17:50 Ontario, Los Angeles (ONT) 2 20:50 Seattle-Tacoma (SEA)
DL 4031 Non-stop Embraer EMB 175 (E7W) 3:00 Effective from 2026-10-06
Daily 17:53 Ontario, Los Angeles (ONT) 2 20:50 Seattle-Tacoma (SEA)
DL 4031 Non-stop Embraer EMB 175 (E7W) 2:57 Effective 2026-03-08 through 2026-04-12
Daily 17:55 Ontario, Los Angeles (ONT) 2 20:50 Seattle-Tacoma (SEA)
DL 4031 Non-stop Embraer EMB 175 (E7W) 2:55 Effective 2026-04-13 through 2026-10-05
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This flight number is listed as serving the following routes:


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Delta Air Lines flight DL 4031: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL4031
11:15
Seattle-Tacoma (SEA)

13:56
Ontario, Los Angeles (ONT) 2
Effective 2026-01-05 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:41, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL4031
11:15
Seattle-Tacoma (SEA)

13:54
Ontario, Los Angeles (ONT) 2
Effective 2026-02-12 through 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:39, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL4031
14:30
Seattle-Tacoma (SEA)

17:12
Ontario, Los Angeles (ONT) 2
Effective 2026-03-08 through 2026-03-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:42, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL4031
14:30
Seattle-Tacoma (SEA)

17:13
Ontario, Los Angeles (ONT) 2
Effective 2026-03-15 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:43, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL4031
14:35
Seattle-Tacoma (SEA)

17:16
Ontario, Los Angeles (ONT) 2
Effective 2026-04-13 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:41, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL4031
14:35
Seattle-Tacoma (SEA)

17:17
Ontario, Los Angeles (ONT) 2
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:42, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL4031
15:30
Ontario, Los Angeles (ONT) 2

18:35
Seattle-Tacoma (SEA)
Effective 2026-01-05 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:05, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL4031
17:50
Ontario, Los Angeles (ONT) 2

20:50
Seattle-Tacoma (SEA)
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:00, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL4031
17:53
Ontario, Los Angeles (ONT) 2

20:50
Seattle-Tacoma (SEA)
Effective 2026-03-08 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:57, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL4031
17:55
Ontario, Los Angeles (ONT) 2

20:50
Seattle-Tacoma (SEA)
Effective 2026-04-13 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:55, non-stop
Embraer EMB 175 (E7W)
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This flight number is listed as serving the following routes:
  • Seattle-Tacoma (SEA) - Ontario, Los Angeles (ONT)
All Delta Air Lines flights
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