tailodds FORECAST
Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Dulles → Las Vegas via San Francisco: arrives on time 89%

  1. 22:21 IAD → 01:15 SFO
    UA 367 · United · 5h 54m · 84% on time, 0.6% cancelled
  2. 3h 45m layover in San Francisco (SFO) · 90 min minimum on separate tickets
  3. 05:00 SFO → 06:35 LAS +1 day
    WN 4231 · Southwest · 1h 35m · 90% on time, 0.0% cancelled

Total trip 11h 14m, scheduled departure to arrival (Las Vegas is 3 h behind Dulles). Times are local. Both flew on 38 of the last 56 days.

Makes the connection99%The first flight arrived more than 135 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 3h 45m layover.
Arrives on time89%First flight not cancelled (0.6% are) × connection made (99%) × second flight not cancelled (0.0% are) and within 15 minutes (90%).
Total trip11h 14mIAD 22:21 to LAS 06:35, 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.