Showing United only (incl. its regional partners)All airlines ×

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

No clear winner: United’s TUS → IAH flights land within a few points of 9 in 10 on time whatever the hour.

Best time to leave 7–8 am 95% arrive on time from TUS

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).

TUS

% 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 United flight on this route ran 150+ times in the year.

All 4 United 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.


UA 4042flown by Mesa	TUS 06:37	IAH 11:13	2h 36m	37	95%	0.0%	41 min
UA 4056flown by Mesa	TUS 06:37	IAH 11:13	2h 36m	34	94%	0.0%	60 min
UA 4045flown by Mesa	TUS 10:55	IAH 15:29	2h 34m	36	78%	0.0%	68 min
UA 4044flown by Mesa	TUS 10:55	IAH 15:29	2h 34m	35	74%	0.0%	75 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.


United	TUS	IAH	2h 33m	90%	0.8%	719	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