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1,402 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

United is clearly ahead here: 88% of its flights arrive on time, 12 points better than Alaska.

Best time to leave 9–10 am 96% arrive on time from IAD
Best single flight UA 1930 IAD 08:26 → SAN 10:49 · 94% on time Avoid AS 201 IAD 19:49 → SAN 22:13 · 74% 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).

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IAD
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71
% 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.

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 1,041 88% 0.6% 62 min
Alaska 361 76% 0.6% 49 min

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 1930 IAD 08:26 SAN 10:49 94%
UA 2163 IAD 12:40 SAN 15:03 85%
UA 2054 IAD 18:00 SAN 20:23 83%
AS 201 IAD 19:49 SAN 22:13 74%

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 IAD SAN 5h 23m 88% 0.6% 1,041 Flying now
Alaska IAD SAN 5h 38m 76% 0.6% 361 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