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3,033 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 62%.

Best time to leave 5–6 am 94% arrive on time from BOI
Best single flight UA 1782 BOI 06:30 → DEN 08:29 · 92% on time Avoid UA 2173 BOI 14:40 → DEN 16:39 · 76% 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
BOI
94
94
96
98
93
91
82
82
81
77
69
35
71
% 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 BOI 5–6 pm: 1Close ×
UA 2395 BOI 17:46 DEN 19:45 1h 59m 71 46% 0.0% 66 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) 1,815 84% 0.1% 91 min
Southwest 1,088 79% 0.2% 57 min
Frontier 130 – 0.0% 116 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 1782 BOI 06:30 DEN 08:29 92%
UA 5924flown by SkyWest BOI 05:00 DEN 07:05 91%
UA 2173 BOI 14:40 DEN 16:39 76%
All 10 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 BOI DEN 2h 05m 84% 0.1% 1,815 Flying now
Frontier BOI DEN 2h 11m 82% 0.0% 130 Flying now
Southwest BOI DEN 1h 55m 79% 0.2% 1,088 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