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

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

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 72%.

Best time to leave 6–7 am 88% arrive on time from IAH

Best single flight F9 3229 IAH 06:30 → DEN 08:06 · 88% on time Avoid F9 3227 IAH 18:14 → DEN 19:58 · 65% 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.


F9 3229	IAH 06:30	DEN 08:06	88%
F9 3227	IAH 18:14	DEN 19:58	65%

All 4 Frontier 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.


F9 3229	IAH 06:30	DEN 08:06	2h 36m	356	88%	0.6%	108 min
F9 3227	IAH 18:14	DEN 19:58	2h 49m	184	65%	2.2%	69 min
F9 3205	IAH 22:08	DEN 23:58	2h 50m	72	80%	1.4%	50 min
F9 4855	IAH 22:25	DEN 00:18	2h 53m	68	85%	0.0%	60 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.


Frontier	IAH	DEN	2h 49m	80%	1.0%	816	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