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1,514 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 3 in 4.

Best time to leave 8–9 am 93% arrive on time from IAD
Best single flight UA 641 IAD 08:35 → BOS 10:20 · 92% on time Avoid UA 688 IAD 17:25 → BOS 19:14 · 63% 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).

8
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IAD
93
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85
47
69
80
% 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 (incl. Republic) 1,514 78% 2.5% 71 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 641 IAD 08:35 BOS 10:20 92%
UA 755 IAD 22:10 BOS 23:59 81%
UA 688 IAD 17:25 BOS 19:14 63%

All 6 flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
UA 641 IAD 08:35 BOS 10:20 1h 45m 344 92% 1.5% 58 min
UA 3552flown by Republic IAD 10:00 BOS 11:52 1h 52m 27 85% 3.7% 50 min
UA 1392 IAD 12:55 BOS 14:40 1h 45m 149 82% 1.3% 72 min
UA 3615flown by Republic IAD 15:30 BOS 17:24 1h 54m 27 65% 25.9% 71 min
UA 688 IAD 17:25 BOS 19:14 1h 49m 362 63% 3.3% 79 min
UA 755 IAD 22:10 BOS 23:59 1h 49m 323 81% 2.2% 66 min

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 IAD BOS 1h 40m 78% 2.5% 1,514 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