UA2121United Airlines · DEN → GRR

live · 5m ago

Route confirmed United Airlines

UA2121 DenverDEN · 17:45 Grand RapidsGRR · 22:20

UA2121 by United Airlines flies from Denver (DEN) to Grand Rapids (GRR) for the Thu, Nov 12 departure.

Right nowOn time · gate A14

17:45

departs DEN · on schedule

Typical gate push−2 minmedian posted departure

Typical arrival−5 minmedian over 10 operations

Wins back in air~3 minmedian gate push vs arrival · how planes make up time → Cancellation0 in 10tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival

0+30+60+90 min

11-12

−9 arrival

11-11

+6 gate · −9 arrival

11-10

−5 gate · −20 arrival

11-09

−2 gate · −6 arrival

11-08

−4 gate · −5 arrival

11-07

−1 gate · −3 arrival

11-06

−1 gate · −4 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −5 min · 0 cancelled · 10 operations tracked

The route today

live boards

DENDenverOn-time likelyDEN delay board →

GRRGrand RapidsOn-time likelyGRR delay board →

DEN→GRRevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample

38%Chance of 15+ min delay

0.9%Chance of cancellation

+9 minTypical airport delay in this weather

Driven mainly by GRR (Grand Rapids), currently flying MVFR (marginal visual). These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at Denver

Forecast

Fri 13 Nov, local date

High17°Clikely 14°C to 19°C

Low3°Clikely 1°C to 5°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Grand Rapids

Forecast

Fri 13 Nov, local date

High5°Clikely 4°C to 6°C

Low−1°Clikely −2°C to 1°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures

061422

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Denver to Grand Rapids flights today

same route · United Airlines

UA2637departs 10:01

If UA2121 is cancelled, this is the other United Airlines nonstop flight from Denver to Grand Rapids on the same day, with scheduled departure times in DEN local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How UA2121 actually runs

Pro Flight Search has tracked every published board update for UA2121 across the DEN and GRR boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 9 confirmed landings · 9/9 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how UA2121 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation

11-12DEN 17:45GRR 22:20 22:11 (−9)

11-11DEN 17:45 17:51 (+6)GRR 22:20 22:11 (−9)

11-10DEN 17:45 17:40 (−5)GRR 22:20 22:00 (−20)

11-09DEN 17:45 17:43 (−2)GRR 22:20 22:14 (−6)

11-08DEN 17:45 17:41 (−4)GRR 22:20 22:15 (−5)

11-07DEN 17:45 17:44 (−1)GRR 22:20 22:17 (−3)

11-06DEN 17:45 17:44 (−1)GRR 22:20 22:16 (−4)

11-05DEN 17:45 17:43 (−2)GRR 22:20 22:11 (−9)

11-04DEN 17:45 17:40 (−5)GRR 22:20 22:15 (−5)

11-03DEN 17:45 17:41 (−4)GRR 22:20 22:18 (−2)

Aircraft

Recent tails: N39423, N69819, N37419, N53442.

Board clocks recorded as DEN and GRR published them.

Planning around UA2121? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: UA2121 Denver to Grand Rapids on-time performance, measured from the DEN and GRR airport boards.

Canonical URL

https://proflightsearch.com/flight/UA2121

How we measure this →