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6,024 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: airlines, airports and hours on this route all land within a few points of 85% on time.

Best time to leave 6–7 am 95% arrive on time from LAX
Best airport pair LAX → IAD 88% on time, 0.6% cancelled, 2,474 flights
Best single flight UA 2632 LAX 21:30 → IAD 05:36 · 94% on time Avoid AA 591 LAX 12:26 → DCA 20:29 · 78% on time

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
22
23
LAX
87
95
89
86
86
87
80
75
76
91
78
87
86
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
Washington flights leaving LAX 11 pm–12 am: 3Close ×
UA 1605 LAX 23:05 BWI 07:14 5h 09m 245 91% 0.0% 70 min
UA 418 LAX 23:30 IAD 07:33 5h 03m 122 93% 0.8% 28 min
UA 2282 LAX 23:30 IAD 07:33 5h 03m 298 89% 0.7% 43 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
United 2,918 89% 0.5% 56 min
Delta LAX→DCA only 362 81% 2.2% 103 min
American 844 81% 1.1% 69 min
Southwest 1,438 80% 1.0% 41 min
Alaska 383 79% 0.8% 66 min
Spirit LAX→BWI only 79 – 1.3% 51 min

Dimmed: fewer than 150 flights in the year, too few to rank.

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.
UA 2632 LAX 21:30 IAD 05:36 94%
UA 1573 LAX 16:49 IAD 00:55 92%
UA 1605 LAX 23:05 BWI 07:14 91%
UA 2667 LAX 10:39 IAD 18:48 90%
UA 1635 LAX 12:43 IAD 20:48 89%
· · ·
DL 392 LAX 07:35 DCA 15:35 81%
AS 6 LAX 11:48 DCA 20:00 78%
AA 591 LAX 12:26 DCA 20:29 78%
All 22 flights on this route →

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.
United LAX BWI 5h 06m 90% 0.3% 579 Flying now
United LAX IAD 5h 03m 88% 0.6% 2,339 Flying now
Southwest ONT BWI 4h 45m 85% 0.4% 281 Flying now
American LAX DCA 4h 59m 82% 1.2% 728 Flying now
Delta LAX DCA 5h 00m 81% 2.2% 362 Flying now
Southwest LAX BWI 4h 55m 79% 1.2% 1,029 Flying now
Alaska LAX DCA 5h 12m 78% 0.8% 364 Flying now
American LAX IAD 4h 59m 77% 0.0% 116 Flying now
Southwest LGB BWI 4h 55m 83% 0.8% 128 Not flying now
Spirit LAX BWI 4h 59m 76% 1.3% 79 Not flying now
Alaska LAX IAD 5h 05m 89%few flights 0.0% 19 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