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Showing Southwest only (incl. its regional partners)All airlines ×
1,438 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 73%.

Best time to leave 6–7 am 94% arrive on time from LAX
Best airport pair ONT → BWI 85% on time, fewest cancelled (0.4%), 281 flights

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
LAX
87
94
65
78
60
44
69
LGB
71
ONT
80
84
% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Pick an hour to see this route’s flights leaving then.

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.

No Southwest flight on this route ran 150+ times in the year.

All 5 Southwest flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
WN 2383 LAX 05:00 BWI 13:00 5h 00m 34 76% 0.0% 21 min
WN 2854 LAX 12:15 BWI 20:10 4h 55m 16 64% 12.5% 30 min
WN 2384 LAX 13:35 BWI 21:35 5h 00m 26 54% 3.8% 60 min
WN 3143 ONT 21:40 BWI 05:30 4h 50m 58 90% 0.0% 21 min
WN 2385 LAX 21:50 BWI 05:45 4h 55m 58 71% 0.0% 26 min

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
Southwest ONT BWI 4h 45m 85% 0.4% 281 Flying now
Southwest LAX BWI 4h 55m 79% 1.2% 1,029 Flying now
Southwest LGB BWI 4h 55m 83% 0.8% 128 Not flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON