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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).

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
RDU
96
96
95
89
77
73
46
63
% 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.

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 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.
WN 4083 RDU 05:15 DEN 06:50 3h 35m 42 88% 0.0% 81 min
UA 2383 RDU 08:30 DEN 10:17 3h 47m 93 90% 0.0% 86 min
F9 2225 RDU 12:26 DEN 14:29 4h 03m 258 82% 1.2% 79 min
UA 2288 RDU 16:22 DEN 18:25 4h 03m 331 81% 0.3% 84 min
WN 3428 RDU 16:55 DEN 18:40 3h 45m 42 43% 0.0% 60 min
WN 2553 RDU 18:20 DEN 20:05 3h 45m 16 60% 6.2% 82 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 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