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3,517 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 8–9 am 96% arrive on time from BWI
Best single flight DL 5813 BWI 06:17 → BOS 08:00 · 97% on time Avoid DL 5644 BWI 18:21 → BOS 20:00 · 67% 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).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
BWI
93
92
94
89
83
83
75
60
67
70
42
54
43
64
56
53
52
% 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 82% 3.7% 82 min
Southwest 2,376 73% 2.4% 62 min
Spirit 47 – 4.3% 43 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 5813flown by Republic BWI 06:17 BOS 08:00 97%
DL 5703flown by Republic BWI 09:00 BOS 10:39 91%
DL 5668flown by Republic BWI 13:29 BOS 15:05 80%
DL 5644flown by Republic BWI 18:21 BOS 20:00 67%
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.
Delta BWI BOS 1h 39m 82% 3.7% 1,094 Flying now
Southwest BWI BOS 1h 30m 73% 2.4% 2,376 Flying now
Spirit BWI BOS 1h 26m 71% 4.3% 47 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