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

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

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

Best time to leave 7–8 am 96% arrive on time from SJU

Best single flight UA 1644 SJU 07:00 → IAH 10:53 · 96% on time Avoid UA 668 SJU 14:55 → IAH 18:51 · 81% 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).

SJU

% 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 1644	SJU 07:00	IAH 10:53	96%
UA 668	SJU 14:55	IAH 18:51	81%

All 3 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 2495	SJU 02:05	IAH 06:01	4h 56m	143	94%	0.7%	63 min
UA 1644	SJU 07:00	IAH 10:53	4h 53m	364	96%	0.5%	59 min
UA 668	SJU 14:55	IAH 18:51	4h 56m	365	81%	0.3%	56 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	SJU	IAH	4h 56m	89%	0.5%	872	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