1,745 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 95% depart on time. After 4 pm it’s 7 in 10.

Best time to leave 12–1 pm 96% arrive on time from RDU

Best single flight F9 2225 RDU 12:26 → DEN 14:29 · 82% on time Avoid UA 2288 RDU 16:22 → DEN 18:25 · 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).

RDU

% 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

Denver flights leaving RDU 8–9 am: 1Close ×


UA 2383	RDU 08:30	DEN 10:17	3h 47m	93	90%	0.0%	86 min

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	745	87%	0.5%	92 min
Frontier	291	82%	1.4%	76 min
Southwest	709	76%	1.0%	55 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.


F9 2225	RDU 12:26	DEN 14:29	82%
UA 2288	RDU 16:22	DEN 18:25	81%

All 6 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	RDU	DEN	4h 03m	87%	0.5%	745	Flying now
Frontier	RDU	DEN	4h 10m	82%	1.4%	291	Flying now
Southwest	RDU	DEN	3h 50m	76%	1.0%	709	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