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

1,559 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 7 in 10.

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

Best single flight UA 1977 IAH 07:30 → BOS 12:28 · 94% 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

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.


UA 1977	IAH 07:30	BOS 12:28	94%

All 5 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 1977	IAH 07:30	BOS 12:28	3h 58m	361	94%	1.1%	60 min
UA 2393	IAH 09:50	BOS 14:48	3h 58m	71	82%	0.0%	78 min
UA 1957	IAH 12:30	BOS 17:34	4h 04m	93	61%	0.0%	75 min
UA 2161	IAH 16:40	BOS 21:44	4h 04m	71	69%	0.0%	84 min
UA 521	IAH 18:15	BOS 23:19	4h 04m	124	68%	0.0%	63 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	IAH	BOS	3h 53m	76%	1.1%	1,559	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