Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Buffalo → Denver via Dulles: arrives on time 68%
-
19:52 BUF → 21:15 IADUA 4270 · United, flown by CommuteAir · 1h 23m · 82% on time, 3.9% cancelled
-
1h 08m layover in Dulles (IAD) · 45 min minimum on one ticket
-
22:23 IAD → 00:30 DEN +1 dayUA 495 · United · 4h 07m · 84% on time, 0.3% cancelled
Total trip 6h 38m, scheduled departure to arrival (Denver is 2 h behind Buffalo). Times are local. Both flew on 51 of the last 56 days.
Makes the connection84%The first flight arrived more than 23 minutes late on 16% of the days it flew: too late for the 45-minute minimum connection on a 1h 08m layover.
Arrives on time68%First flight not cancelled (3.9% are) × connection made (84%) × second flight not cancelled (0.3% are) and within 15 minutes (84%).
Total trip6h 38mBUF 19:52 to DEN 00:30, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.