Southwest Airlines flights from Phoenix Sky Harbor (PHX) to Ontario, Los Angeles (ONT).

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sun 14:50 Phoenix Sky Harbor (PHX) 4 16:00 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 4113 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2026-08-09 through 2026-09-27
Tue,Wed 16:25 Phoenix Sky Harbor (PHX) 4 17:35 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 4113 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2026-08-04 through 2026-09-30
Mon,Thu,Fri 20:55 Phoenix Sky Harbor (PHX) 4 22:05 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 4113 Non-stop Boeing 737 MAX 8 (7M8) 1:10 Effective 2026-08-06 through 2026-09-28
Sat 16:45 Phoenix Sky Harbor (PHX) 4 18:00 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 4142 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2026-03-14 through 2026-04-04
Sat 17:45 Phoenix Sky Harbor (PHX) 4 18:00 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 4142 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Operates only on 2026-03-07
Mon,Thu,Fri 22:55 Phoenix Sky Harbor (PHX) 4 00:10 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 4428 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-03-09 through 2026-04-06
The flight arrives 1 day after departure.
Thu,Fri 23:55 Phoenix Sky Harbor (PHX) 4 00:10 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 4428 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-03-05 through 2026-03-06
The flight arrives 1 day after departure.
Sat 16:10 Phoenix Sky Harbor (PHX) 4 17:20 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 4455 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2026-08-08 through 2026-09-26
Sun 17:00 Phoenix Sky Harbor (PHX) 4 18:15 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 4455 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Effective 2026-08-09 through 2026-09-27
Sat 10:00 Phoenix Sky Harbor (PHX) 4 11:15 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 5062 Non-stop Boeing 737-800 (73H) 1:15 Effective 2026-08-08 through 2026-09-26
Tue 19:45 Phoenix Sky Harbor (PHX) 4 20:55 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 5122 Non-stop Boeing 737 MAX 8 (7M8) 1:10 Effective 2026-08-04 through 2026-09-29
Wed 19:45 Phoenix Sky Harbor (PHX) 4 20:55 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 5128 Non-stop Boeing 737 MAX 8 (7M8) 1:10 Effective 2026-08-05 through 2026-09-30
Non-Direct Flights:
Mon 21:25 Phoenix Sky Harbor (PHX) 4 23:15 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 1228 1-stop Boeing 737-700 (Scimitar Winglets) 2:50 Operates only on 2026-01-05
Sun 07:45 Phoenix Sky Harbor (PHX) 4 10:55 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 2045 1-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-03-08 through 2026-04-05
Tue,Wed 13:35 Phoenix Sky Harbor (PHX) 4 16:30 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 2045 1-stop Boeing 737-700 (Scimitar Winglets) 2:55 Effective 2026-03-10 through 2026-04-01
Mon-Fri 15:10 Phoenix Sky Harbor (PHX) 4 17:10 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 2194 1-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 15:10 Phoenix Sky Harbor (PHX) 4 17:10 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 2194 1-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-01-18 through 2026-01-23
Mon-Fri 15:10 Phoenix Sky Harbor (PHX) 4 17:10 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 2194 1-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-01-26 through 2026-02-04
Tue,Wed 15:10 Phoenix Sky Harbor (PHX) 4 17:10 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 2194 1-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-02-10 through 2026-02-11
Tue,Wed 15:10 Phoenix Sky Harbor (PHX) 4 17:10 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 2194 1-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-02-18 through 2026-03-04
Tue,Wed 08:30 Phoenix Sky Harbor (PHX) 4 11:35 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 2764 1-stop Boeing 737-700 (Scimitar Winglets) 3:05 Effective 2026-04-07 through 2026-06-03
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Southwest Airlines flights from Phoenix Sky Harbor (PHX) to Ontario, Los Angeles (ONT).
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN4113
14:50
Phoenix Sky Harbor (PHX) 4

16:00
Ontario, Los Angeles (ONT) 4
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4113
16:25
Phoenix Sky Harbor (PHX) 4

17:35
Ontario, Los Angeles (ONT) 4
Effective 2026-08-04 through 2026-09-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4113
20:55
Phoenix Sky Harbor (PHX) 4

22:05
Ontario, Los Angeles (ONT) 4
Effective 2026-08-06 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN4142
16:45
Phoenix Sky Harbor (PHX) 4

18:00
Ontario, Los Angeles (ONT) 4
Effective 2026-03-14 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4142
17:45
Phoenix Sky Harbor (PHX) 4

18:00
Ontario, Los Angeles (ONT) 4
Operates only on 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4428
22:55
Phoenix Sky Harbor (PHX) 4

00:10(+1)
Ontario, Los Angeles (ONT) 4
Effective 2026-03-09 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Direct Flights:
Southwest Airlines WN4428
23:55
Phoenix Sky Harbor (PHX) 4

00:10(+1)
Ontario, Los Angeles (ONT) 4
Effective 2026-03-05 through 2026-03-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Direct Flights:
Southwest Airlines WN4455
16:10
Phoenix Sky Harbor (PHX) 4

17:20
Ontario, Los Angeles (ONT) 4
Effective 2026-08-08 through 2026-09-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN4455
17:00
Phoenix Sky Harbor (PHX) 4

18:15
Ontario, Los Angeles (ONT) 4
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN5062
10:00
Phoenix Sky Harbor (PHX) 4

11:15
Ontario, Los Angeles (ONT) 4
Effective 2026-08-08 through 2026-09-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN5122
19:45
Phoenix Sky Harbor (PHX) 4

20:55
Ontario, Los Angeles (ONT) 4
Effective 2026-08-04 through 2026-09-29
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN5128
19:45
Phoenix Sky Harbor (PHX) 4

20:55
Ontario, Los Angeles (ONT) 4
Effective 2026-08-05 through 2026-09-30
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN1228
21:25
Phoenix Sky Harbor (PHX) 4

23:15
Ontario, Los Angeles (ONT) 4
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:50, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN2045
07:45
Phoenix Sky Harbor (PHX) 4

10:55
Ontario, Los Angeles (ONT) 4
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:10, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN2045
13:35
Phoenix Sky Harbor (PHX) 4

16:30
Ontario, Los Angeles (ONT) 4
Effective 2026-03-10 through 2026-04-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN2194
15:10
Phoenix Sky Harbor (PHX) 4

17:10
Ontario, Los Angeles (ONT) 4
Effective 2026-01-06 through 2026-01-14
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 3:00, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN2194
15:10
Phoenix Sky Harbor (PHX) 4

17:10
Ontario, Los Angeles (ONT) 4
Effective 2026-01-18 through 2026-01-23
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 3:00, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN2194
15:10
Phoenix Sky Harbor (PHX) 4

17:10
Ontario, Los Angeles (ONT) 4
Effective 2026-01-26 through 2026-02-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 3:00, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN2194
15:10
Phoenix Sky Harbor (PHX) 4

17:10
Ontario, Los Angeles (ONT) 4
Effective 2026-02-10 through 2026-02-11
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:00, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN2194
15:10
Phoenix Sky Harbor (PHX) 4

17:10
Ontario, Los Angeles (ONT) 4
Effective 2026-02-18 through 2026-03-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:00, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN2764
08:30
Phoenix Sky Harbor (PHX) 4

11:35
Ontario, Los Angeles (ONT) 4
Effective 2026-04-07 through 2026-06-03
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:05, 1-stop
Boeing 737-700 (Scimitar Winglets)
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  • A domestic route departing from the Phoenix Sky Harbor airport (PHX) and arriving at Ontario, Los Angeles airport (ONT).
  • The flight distance is 324 miles, or 522 km.
  • The timezone of the departure airport is UTC-7 , and the timezone of the arrival airport is UTC-8 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
  • For direct flights, the flight time varies between 1:10 and 1:30.
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