UA1831 · UAL1831

UAL1831 over the last 30 days

As of 2026-10-27

UAL1831 is operated by United Airlines on the route Washington Dulles International Airport (IAD/KIAD) → Newark Liberty International Airport (EWR/KEWR). It usually takes off around 22:40 UTC (18:40 local time, IAD). It usually lands around 23:28 UTC (19:28 local time, EWR). Most frequent aircraft type: BOEING 737-800 (B738).

Days with an observed flight (last 30 days)

29/30

Days of the week with an observed flight

Mon, Tue, Wed, Thu, Fri, Sat, Sun

Typical take-off

22:40 UTC · 18:40 local time (IAD)

Typical landing

23:28 UTC · 19:28 local time (EWR)

Typical time airborne

47 min

Median departure deviation from the usual time on this route

+18 min

Departures within 15 minutes of the usual time

46 %

Departures measured

117

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 737-800 (B738) — Number of flights: 21
• BOEING 737 MAX 9 (B39M) — Number of flights: 13
• BOEING 737-900 (B739) — Number of flights: 9

Aircraft in the last 7 days

• N57409 · BOEING 737 MAX 9 2026-10-27
• N17411 · BOEING 737 MAX 9 2026-10-27
• N17403 · BOEING 737 MAX 9 2026-10-26
• N13718 · BOEING 737-700 2026-10-26
• N23707 · BOEING 737-700 2026-10-25
• N435UA · AIRBUS A-320 2026-10-25

Related flights on this route

• All flights KIAD – KEWR