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3,513 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s barely half.

Best time to leave 9–10 am 95% arrive on time from BOS
Best single flight DL 5703 BOS 06:35 → BWI 08:20 · 90% on time Avoid DL 5644 BOS 15:50 → BWI 17:42 · 79% 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
20
21
BOS
94
95
95
88
96
88
75
78
77
76
67
53
64
35
45
46
41
% 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.
Delta (incl. Republic) 1,094 83% 3.8% 71 min
Southwest 2,374 78% 2.1% 67 min
Spirit 45 – 4.4% 64 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.
DL 5703flown by Republic BOS 06:35 BWI 08:20 90%
DL 5668flown by Republic BOS 11:09 BWI 12:49 84%
DL 5644flown by Republic BOS 15:50 BWI 17:42 79%
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.
Delta BOS BWI 1h 49m 83% 3.8% 1,094 Flying now
Southwest BOS BWI 1h 40m 78% 2.1% 2,374 Flying now
Spirit BOS BWI 1h 30m 70% 4.4% 45 Not 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