Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Portland → Tucson via San Francisco: arrives on time 26%

  1. 18:03 PDX → 19:53 SFO
    UA 1656 · United · 1h 50m · 33% on time, 0.0% cancelled
  2. 1h 04m layover in San Francisco (SFO) · 45 min minimum on one ticket
  3. 20:57 SFO → 23:26 TUS
    UA 5688 · United, flown by SkyWest · 2h 29m · 77% on time, 0.3% cancelled

Total trip 5h 23m, scheduled departure to arrival. Times are local. Both flew on 24 of the last 56 days.

Makes the connection33%The first flight arrived more than 19 minutes late on 67% of the days it flew: too late for the 45-minute minimum connection on a 1h 04m layover.
Arrives on time26%First flight not cancelled (0.0% are) × connection made (33%) × second flight not cancelled (0.3% are) and within 15 minutes (77%).
Total trip5h 23mPDX 18:03 to TUS 23:26, layover included

Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.

Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.