Southwest Airlines flight WN 4331: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sun 05:45 Denver (DEN) 07:05 San Diego (SAN) 1 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Effective 2026-06-07 through 2026-08-02
Mon,Thu,Fri 06:00 Denver (DEN) 07:25 San Diego (SAN) 1 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 2:25 Effective 2026-06-04 through 2026-08-03
Tue,Wed 06:00 Denver (DEN) 07:25 San Diego (SAN) 1 WN 4331 Non-stop Boeing 737-800 (73H) 2:25 Effective 2026-06-09 through 2026-07-29
Tue,Wed 06:15 Fort Myers (RSW) 08:15 Chicago Midway (MDW) WN 4331 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-03-10 through 2026-04-01
Sun 06:35 Los Angeles (LAX) 1 11:40 Kansas City (MCI) WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Operates only on 2026-05-24
Sat 06:45 Fort Myers (RSW) 08:45 Chicago Midway (MDW) WN 4331 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-03-07 through 2026-04-04
Sun 07:05 Fort Myers (RSW) 09:05 Chicago Midway (MDW) WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-03-08 through 2026-04-05
Mon,Thu,Fri 07:10 Fort Myers (RSW) 09:10 Chicago Midway (MDW) WN 4331 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-03-05 through 2026-04-06
Thu 07:55 Denver (DEN) 09:30 Ontario, Los Angeles (ONT) 4 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Operates only on 2026-02-12
Mon,Fri 07:55 Denver (DEN) 09:30 Ontario, Los Angeles (ONT) 4 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-02-13 through 2026-02-20
Thu,Fri,Sun 07:55 Denver (DEN) 09:30 Ontario, Los Angeles (ONT) 4 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-02-22 through 2026-03-01
Sat 08:00 Denver (DEN) 09:40 Ontario, Los Angeles (ONT) 4 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 2:40 Effective 2026-02-14 through 2026-02-28
Sat 08:05 Denver (DEN) 09:40 Ontario, Los Angeles (ONT) 4 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-01-10 through 2026-02-07
Mon 08:30 New York LaGuardia (LGA) B 11:25 Dallas Love Field (DAL) 1 WN 4331 Non-stop Boeing 737-800 (73H) 3:55 Operates only on 2026-01-05
Sun 09:55 Ontario, Los Angeles (ONT) 4 11:25 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Operates only on 2026-01-25
Mon-Fri 10:00 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-01-06 through 2026-01-14
Thu,Fri,Sun 10:00 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-01-11 through 2026-01-16
Tue-Fri,Sun 10:00 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-01-18 through 2026-01-23
Mon 10:00 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Operates only on 2026-01-19
Mon-Fri 10:00 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-01-26 through 2026-02-04
Sun 10:00 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Operates only on 2026-02-01
Tue,Wed,Sun 10:00 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-02-08 through 2026-02-11
Tue,Wed 10:00 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-02-18 through 2026-03-04
Mon,Fri 10:05 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-02-13 through 2026-02-20
Thu,Fri,Sun 10:05 Ontario, Los Angeles (ONT) 4 11:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-02-22 through 2026-03-01
Thu 10:10 Ontario, Los Angeles (ONT) 4 11:35 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Operates only on 2026-02-12
Sat 10:15 Ontario, Los Angeles (ONT) 4 12:30 Phoenix Sky Harbor (PHX) 4 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2026-01-10 through 2026-02-07
Mon,Thu,Fri 10:15 Ontario, Los Angeles (ONT) 4 11:40 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-800 (73H) 1:25 Effective 2026-02-05 through 2026-02-09
Tue,Thu,Sun 10:15 Ontario, Los Angeles (ONT) 4 11:40 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-800 (73H) 1:25 Effective 2026-02-15 through 2026-02-19
Mon 10:15 Ontario, Los Angeles (ONT) 4 11:40 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-800 (73H) 1:25 Effective 2026-02-23 through 2026-03-02
Sat 13:10 Phoenix Sky Harbor (PHX) 4 16:40 Omaha (OMA) WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-01-10 through 2026-02-07
Tue,Wed 16:45 Portland (PDX) 18:30 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:45 Effective 2026-08-04 through 2026-09-30
Sat 17:00 Portland (PDX) 18:45 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:45 Effective 2026-08-08 through 2026-09-26
Sun 17:00 Portland (PDX) 18:45 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:45 Effective 2026-08-09 through 2026-09-27
Mon,Thu,Fri 17:15 Portland (PDX) 19:00 Oakland (OAK) 2 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:45 Effective 2026-08-06 through 2026-09-28
Sat 18:25 Sacramento (SMF) B 21:45 Denver (DEN) WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Effective 2026-04-11 through 2026-05-30
Tue,Wed 19:45 Sacramento (SMF) B 23:05 Denver (DEN) WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 2:20 Effective 2026-04-07 through 2026-06-03
Mon,Thu,Fri 19:45 Sacramento (SMF) B 23:05 Denver (DEN) WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 2:20 Effective 2026-04-09 through 2026-06-01
Fri 19:50 San Jose (SJC) B 21:10 San Diego (SAN) 1 WN 4331 Non-stop Boeing 737-700 (Scimitar Winglets) 1:20 Operates only on 2026-01-02
Sun 19:55 San Jose (SJC) B 21:20 San Diego (SAN) 1 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Operates only on 2026-01-04
Sat 20:20 San Jose (SJC) B 21:40 San Diego (SAN) 1 WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 1:20 Valid until 2026-01-03
Sun 20:25 Sacramento (SMF) B 23:40 Denver (DEN) WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 2:15 Effective 2026-04-12 through 2026-05-17
Sun 20:25 Sacramento (SMF) B 23:40 Denver (DEN) WN 4331 Non-stop Boeing 737 MAX 8 (7M8) 2:15 Operates only on 2026-05-31
Non-Direct Flights:
Thu 07:55 Denver (DEN) 11:35 Oakland (OAK) 2 WN 4331 1-stop Boeing 737 MAX 8 (7M8) 4:40 Operates only on 2026-02-12
Mon,Fri 07:55 Denver (DEN) 11:30 Oakland (OAK) 2 WN 4331 1-stop Boeing 737-700 (Scimitar Winglets) 4:35 Effective 2026-02-13 through 2026-02-20
Thu,Fri,Sun 07:55 Denver (DEN) 11:30 Oakland (OAK) 2 WN 4331 1-stop Boeing 737-700 (Scimitar Winglets) 4:35 Effective 2026-02-22 through 2026-03-01
Sat 08:05 Denver (DEN) 12:30 Phoenix Sky Harbor (PHX) 4 WN 4331 1-stop Boeing 737-700 (Scimitar Winglets) 4:25 Effective 2026-01-10 through 2026-02-07
Sat 10:15 Ontario, Los Angeles (ONT) 4 16:40 Omaha (OMA) WN 4331 1-stop Boeing 737-700 (Scimitar Winglets) 4:25 Effective 2026-01-10 through 2026-02-07
Sat 08:05 Denver (DEN) 16:40 Omaha (OMA) WN 4331 2-stop Boeing 737-700 (Scimitar Winglets) 7:35 Effective 2026-01-10 through 2026-02-07

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This flight number is listed as serving the following routes:

Denver (DEN) - Oakland (OAK)
Denver (DEN) - Omaha (OMA)
Denver (DEN) - Ontario, Los Angeles (ONT)
Denver (DEN) - Phoenix Sky Harbor (PHX)
Denver (DEN) - San Diego (SAN)
Fort Myers (RSW) - Chicago Midway (MDW)
Los Angeles (LAX) - Kansas City (MCI)
New York LaGuardia (LGA) - Dallas Love Field (DAL)
Ontario, Los Angeles (ONT) - Oakland (OAK)
Ontario, Los Angeles (ONT) - Omaha (OMA)
Ontario, Los Angeles (ONT) - Phoenix Sky Harbor (PHX)
Phoenix Sky Harbor (PHX) - Omaha (OMA)
Portland (PDX) - Oakland (OAK)
Sacramento (SMF) - Denver (DEN)
San Jose (SJC) - San Diego (SAN)

All Southwest Airlines flights

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Southwest Airlines flight WN 4331: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN4331

05:45

Denver (DEN)

07:05

San Diego (SAN) 1

Effective 2026-06-07 through 2026-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

06:00

Denver (DEN)

07:25

San Diego (SAN) 1

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

06:00

Denver (DEN)

07:25

San Diego (SAN) 1

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4331

06:15

Fort Myers (RSW)

08:15

Chicago Midway (MDW)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4331

06:35

Los Angeles (LAX) 1

11:40

Kansas City (MCI)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

06:45

Fort Myers (RSW)

08:45

Chicago Midway (MDW)

Effective 2026-03-07 through 2026-04-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4331

07:05

Fort Myers (RSW)

09:05

Chicago Midway (MDW)

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

07:10

Fort Myers (RSW)

09:10

Chicago Midway (MDW)

Effective 2026-03-05 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4331

07:55

Denver (DEN)

09:30

Ontario, Los Angeles (ONT) 4

Operates only on 2026-02-12

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

07:55

Denver (DEN)

09:30

Ontario, Los Angeles (ONT) 4

Effective 2026-02-13 through 2026-02-20

Mon

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

07:55

Denver (DEN)

09:30

Ontario, Los Angeles (ONT) 4

Effective 2026-02-22 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

08:00

Denver (DEN)

09:40

Ontario, Los Angeles (ONT) 4

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

08:05

Denver (DEN)

09:40

Ontario, Los Angeles (ONT) 4

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

08:30

New York LaGuardia (LGA) B

11:25

Dallas Love Field (DAL) 1

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4331

09:55

Ontario, Los Angeles (ONT) 4

11:25

Oakland (OAK) 2

Operates only on 2026-01-25

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

10:00

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Effective 2026-01-06 through 2026-01-14

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

10:00

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Effective 2026-01-11 through 2026-01-16

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

10:00

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Effective 2026-01-18 through 2026-01-23

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

10:00

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Operates only on 2026-01-19

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

10:00

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Effective 2026-01-26 through 2026-02-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

10:00

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Operates only on 2026-02-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

10:00

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Effective 2026-02-08 through 2026-02-11

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

10:00

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Effective 2026-02-18 through 2026-03-04

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

10:05

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Effective 2026-02-13 through 2026-02-20

Mon

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

10:05

Ontario, Los Angeles (ONT) 4

11:30

Oakland (OAK) 2

Effective 2026-02-22 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

10:10

Ontario, Los Angeles (ONT) 4

11:35

Oakland (OAK) 2

Operates only on 2026-02-12

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

10:15

Ontario, Los Angeles (ONT) 4

12:30

Phoenix Sky Harbor (PHX) 4

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

10:15

Ontario, Los Angeles (ONT) 4

11:40

Oakland (OAK) 2

Effective 2026-02-05 through 2026-02-09

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4331

10:15

Ontario, Los Angeles (ONT) 4

11:40

Oakland (OAK) 2

Effective 2026-02-15 through 2026-02-19

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun

Duration: 1:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4331

10:15

Ontario, Los Angeles (ONT) 4

11:40

Oakland (OAK) 2

Effective 2026-02-23 through 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:25, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4331

13:10

Phoenix Sky Harbor (PHX) 4

16:40

Omaha (OMA)

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

16:45

Portland (PDX)

18:30

Oakland (OAK) 2

Effective 2026-08-04 through 2026-09-30

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:45, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

17:00

Portland (PDX)

18:45

Oakland (OAK) 2

Effective 2026-08-08 through 2026-09-26

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

17:00

Portland (PDX)

18:45

Oakland (OAK) 2

Effective 2026-08-09 through 2026-09-27

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:45, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

17:15

Portland (PDX)

19:00

Oakland (OAK) 2

Effective 2026-08-06 through 2026-09-28

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

18:25

Sacramento (SMF) B

21:45

Denver (DEN)

Effective 2026-04-11 through 2026-05-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

19:45

Sacramento (SMF) B

23:05

Denver (DEN)

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:20, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

19:45

Sacramento (SMF) B

23:05

Denver (DEN)

Effective 2026-04-09 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

19:50

San Jose (SJC) B

21:10

San Diego (SAN) 1

Operates only on 2026-01-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 1:20, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4331

19:55

San Jose (SJC) B

21:20

San Diego (SAN) 1

Operates only on 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

20:20

San Jose (SJC) B

21:40

San Diego (SAN) 1

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

20:25

Sacramento (SMF) B

23:40

Denver (DEN)

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4331

20:25

Sacramento (SMF) B

23:40

Denver (DEN)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN4331

07:55

Denver (DEN)

11:35

Oakland (OAK) 2

Operates only on 2026-02-12

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 4:40, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN4331

07:55

Denver (DEN)

11:30

Oakland (OAK) 2

Effective 2026-02-13 through 2026-02-20

Mon

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 4:35, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4331

07:55

Denver (DEN)

11:30

Oakland (OAK) 2

Effective 2026-02-22 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 4:35, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4331

08:05

Denver (DEN)

12:30

Phoenix Sky Harbor (PHX) 4

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:25, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4331

10:15

Ontario, Los Angeles (ONT) 4

16:40

Omaha (OMA)

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:25, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4331

08:05

Denver (DEN)

16:40

Omaha (OMA)

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 7:35, 2-stop
Boeing 737-700 (Scimitar Winglets)

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This flight number is listed as serving the following routes:

Denver (DEN) - Oakland (OAK)
Denver (DEN) - Omaha (OMA)
Denver (DEN) - Ontario, Los Angeles (ONT)
Denver (DEN) - Phoenix Sky Harbor (PHX)
Denver (DEN) - San Diego (SAN)
Fort Myers (RSW) - Chicago Midway (MDW)
Los Angeles (LAX) - Kansas City (MCI)
New York LaGuardia (LGA) - Dallas Love Field (DAL)
Ontario, Los Angeles (ONT) - Oakland (OAK)
Ontario, Los Angeles (ONT) - Omaha (OMA)
Ontario, Los Angeles (ONT) - Phoenix Sky Harbor (PHX)
Phoenix Sky Harbor (PHX) - Omaha (OMA)
Portland (PDX) - Oakland (OAK)
Sacramento (SMF) - Denver (DEN)
San Jose (SJC) - San Diego (SAN)

All Southwest Airlines flights

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