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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
Baltimore flights leaving BOS 6–7 am: 1Close ×
DL 5703flown by Republic BOS 06:35 BWI 08:20 1h 44m 218 90% 2.8% 61 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.
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