3,277 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 7 in 10.

Best time to leave 7–8 am 91% arrive on time from DCA

Best single flight UA 1450 DCA 06:00 → IAH 08:13 · 93% on time Avoid UA 1785 DCA 16:59 → IAH 19:27 · 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).

DCA

% 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	2,406	84%	0.8%	87 min
American (incl. PSA, Republic)	871	73%	5.5%	69 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 1450	DCA 06:00	IAH 08:13	93%
UA 697	DCA 08:20	IAH 10:41	91%
UA 382	DCA 12:59	IAH 15:18	91%
UA 2190	DCA 10:58	IAH 13:19	86%
UA 1381	DCA 14:55	IAH 17:14	78%
· · ·
UA 1785	DCA 16:59	IAH 19:27	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	DCA	IAH	3h 22m	84%	0.8%	2,406	Flying now
American	DCA	IAH	3h 37m	73%	5.5%	871	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