3,279 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 92% depart on time. After 4 pm it’s 2 in 3.

Best time to leave 7–8 am 94% arrive on time from IAH

Best single flight UA 2311 IAH 09:47 → DCA 13:57 · 84% on time Avoid UA 1627 IAH 18:05 → DCA 22:15 · 66% 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).

IAH

% 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 IAH 7–8 pm: 1Close ×


UA 2224	IAH 19:50	DCA 23:59	3h 09m	305	70%	0.7%	54 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	2,406	76%	0.7%	68 min
American (incl. PSA, Republic)	873	74%	5.6%	87 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 2311	IAH 09:47	DCA 13:57	84%
UA 654	IAH 11:55	DCA 16:03	75%
UA 2224	IAH 19:50	DCA 23:59	70%
UA 1627	IAH 18:05	DCA 22:15	66%

All 15 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	IAH	DCA	3h 08m	76%	0.7%	2,406	Flying now
American	IAH	DCA	3h 10m	74%	5.6%	873	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