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3,872 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 2 in 3.

Best time to leave 7–8 am 94% arrive on time from DEN
Best single flight UA 2656 DEN 23:59 → BOS 05:58 · 92% on time Avoid B6 394 DEN 14:45 → BOS 20:43 · 68% 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
23
DEN
96
88
78
68
74
57
64
63
61
70
70
29
22
66
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

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 1,900 78% 0.9% 71 min
Delta 372 75% 1.3% 57 min
JetBlue 686 69% 3.1% 86 min
Southwest 914 59% 1.1% 66 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.
UA 2656 DEN 23:59 BOS 05:58 92%
UA 558 DEN 07:45 BOS 13:49 91%
UA 1232 DEN 09:40 BOS 15:44 86%
DL 499 DEN 11:30 BOS 17:36 75%
UA 1356 DEN 17:40 BOS 23:44 73%
· · ·
UA 597 DEN 14:06 BOS 20:10 71%
B6 994 DEN 23:37 BOS 05:30 70%
B6 394 DEN 14:45 BOS 20:43 68%
All 15 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 DEN BOS 4h 02m 78% 0.9% 1,900 Flying now
Delta DEN BOS 4h 06m 75% 1.3% 372 Flying now
JetBlue DEN BOS 3h 58m 69% 3.1% 686 Flying now
Southwest DEN BOS 3h 50m 59% 1.1% 914 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