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2,052 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 96% depart on time. After 4 pm it’s 4 in 5.

Best time to leave 5–6 am 97% arrive on time from GEG
Best single flight UA 1234 GEG 05:00 → DEN 08:20 · 96% on time Avoid UA 1255 GEG 13:41 → DEN 16:57 · 80% 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
GEG
97
94
85
81
77
50
53
81
% 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 GEG 2–3 pm: 2Close ×
WN 1880 GEG 14:15 DEN 17:30 2h 15m 42 59% 2.4% 45 min
WN 1896 GEG 14:55 DEN 18:10 2h 15m 16 31% 0.0% 84 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 (incl. SkyWest) 1,084 86% 0.5% 90 min
Southwest 858 83% 0.1% 56 min
Frontier 110 – 0.0% 34 min

Dimmed: fewer than 150 flights in the year, too few to rank.

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 1234 GEG 05:00 DEN 08:20 96%
UA 1255 GEG 13:41 DEN 16:57 80%
All 8 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 GEG DEN 2h 30m 86% 0.5% 1,084 Flying now
Southwest GEG DEN 2h 15m 83% 0.1% 858 Flying now
Frontier GEG DEN 2h 35m 81% 0.0% 110 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