UA8172 · UAL8172

UAL8172 over the last 30 days

As of 2026-10-24

UAL8172 is operated by United Airlines on the route Washington Dulles International Airport (IAD/KIAD) → San Francisco International Airport (SFO/KSFO). Most frequent aircraft type: BOEING 737-900 (B739).

Days with an observed flight (last 30 days)

6/30

Days of the week with an observed flight

Tue

Median departure deviation from the usual time on this route

+2 min

Departures within 15 minutes of the usual time

76 %

Departures measured

200

Our measurement against the usual departure time of the route, from our own observations over the last 28 days; the figures cover all flights of this airline on the route.

Aircraft types on this flight (last 30 days)

• BOEING 737-900 (B739) — Number of flights: 3
• BOEING 737 MAX 9 (B39M) — Number of flights: 1
• BOEING 737-700 (B737) — Number of flights: 1

Aircraft in the last 7 days

• N38403 · BOEING 737-900 2026-10-24

Related flights on this route

• All flights KIAD – KSFO