Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Dallas via Las Vegas: arrives on time 68%
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13:00 IAD → 15:09 LASUA 2156 · United · 5h 09m · 91% on time, 0.4% cancelled
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2h 11m layover in Las Vegas (LAS) · 90 min minimum on separate tickets
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17:20 LAS → 22:10 DALWN 2220 · Southwest · 2h 50m · 72% on time, 2.4% cancelled
Total trip 10h 10m, scheduled departure to arrival (Dallas is 1 h behind Dulles). Times are local. Both flew on 39 of the last 56 days.
Makes the connection97%The first flight arrived more than 41 minutes late on 3% of the days it flew: too late for the 90-minute minimum connection on a 2h 11m layover.
Arrives on time68%First flight not cancelled (0.4% are) × connection made (97%) × second flight not cancelled (2.4% are) and within 15 minutes (72%).
Total trip10h 10mIAD 13:00 to DAL 22:10, 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.