Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

UNITED · FLIGHT UA 1521 SCHEDULED · TYPICAL SCHEDULE

Friday, October 2 Today

UA 1521 · DSM → DEN

departs 9:14 AM CT · arrives 10:20 AM MT

Forecast issued Fri 7:00 AM ET · 3h before departure

Arrive at DEN more than 15 minutes late?

18% chance · ±0 pts +5 pts · 24h

HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.

How late will it get to DEN?

On time or early
76%
15–30 min late
12%
30 min–1 hour late
1%
1–2 hours late
3%
Over 2 hours late
1%
Cancelled
7%

Gate arrival compared with the scheduled arrival. The ranges add up to 100%.

What’s moving the odds

↑ Arrivals into DEN at that hour are often late

↑ DEN is busy at that time

↓ Gusts to 29 kt forecast at DEN that day

↓ Mostly benign weather forecast at DSM

Weather at each end

DSM (origin) Gusts10 kt Ceilingnone (clear) Visibility10+ mi Precipnone

DEN (destination) Gusts29 kt Ceilingnone (clear) Visibility10+ mi Precipnone

How this resolves

Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.

Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.

UA 1521 · DSM → DEN

Odds over time

How late will it get to DEN?