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3,037 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 92% depart on time. After 4 pm it’s 2 in 3.

Best time to leave 7–8 am 93% arrive on time from DEN
Best single flight UA 2014 DEN 19:28 → BOI 21:29 · 73% on time Avoid UA 5923 DEN 20:25 → BOI 22:37 · 71% 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).

7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
DEN
93
90
89
86
59
63
73
74
80
77
73
60
65
48
% 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
Boise flights leaving DEN 8–9 pm: 2Close ×
UA 5923flown by SkyWest DEN 20:25 BOI 22:37 2h 12m 298 71% 0.3% 63 min
WN 3806 DEN 20:55 BOI 22:55 2h 00m 58 40% 0.0% 59 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) 1,818 80% 0.1% 64 min
Southwest 1,089 73% 0.1% 45 min
Frontier 130 – 0.0% 49 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 2014 DEN 19:28 BOI 21:29 73%
UA 5923flown by SkyWest DEN 20:25 BOI 22:37 71%
All 12 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.
Frontier DEN BOI 2h 00m 83% 0.0% 130 Flying now
United DEN BOI 2h 09m 80% 0.1% 1,818 Flying now
Southwest DEN BOI 2h 00m 73% 0.1% 1,089 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