UA2121 · UAL2121

UAL2121 over the last 30 days

As of 2026-10-28

UAL2121 is operated by United Airlines on the route Denver International Airport (DEN/KDEN) → Gerald R. Ford International Airport (GRR/KGRR). It usually takes off around 00:12 UTC (18:12 local time, DEN). It usually lands around 02:15 UTC (22:15 local time, GRR). Most frequent aircraft type: BOEING 737 MAX 9 (B39M).

Days with an observed flight (last 30 days)

28/30

Days of the week with an observed flight

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

Typical take-off

00:12 UTC · 18:12 local time (DEN)

Typical landing

02:15 UTC · 22:15 local time (GRR)

Typical time airborne

121 min

Median departure deviation from the usual time on this route

+3 min

Departures within 15 minutes of the usual time

91 %

Departures measured

47

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 MAX 9 (B39M) — Number of flights: 26
• BOEING 737-900 (B739) — Number of flights: 4

Aircraft in the last 7 days

• N37449 · BOEING 737 MAX 9 2026-10-28
• N67845 · BOEING 737-900 2026-10-26
• N34460 · BOEING 737-900 2026-10-26
• N27526 · BOEING 737 MAX 9 2026-10-25
• N37506 · BOEING 737 MAX 9 2026-10-24
• N37469 · BOEING 737 MAX 9 2026-10-23

Related flights on this route

• All flights KDEN – KGRR