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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
Boston flights leaving BWI 3–4 pm: 1Close ×
WN 737 BWI 15:35 BOS 17:10 1h 35m 26 54% 0.0% 94 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 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