Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

UNITED · FLIGHT UA 637 SCHEDULED · TYPICAL SCHEDULE

Sunday, October 4 Tomorrow

UA 637 · IAD → AUS

departs 8:30 AM ET · arrives 10:56 AM CT

Forecast issued Sat 1:00 AM ET · 32h before departure

Arrive at AUS more than 15 minutes late?

16% chance · ±1 pts −8 pts · 24h

HOW SURE WE ARE Moderate. The odds now blend history with early weather forecasts.

How late will it get to AUS?

On time or early
84%
15–30 min late
8%
30 min–1 hour late
2%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
<1%

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

What’s moving the odds

↑ Cloud base down to 200 ft, visibility down to 0.8 mi, 0.3 in of rain forecast at IAD that day

↑ AUS is prone to delays

↓ Early flights usually leave on time

↓ Arrivals into AUS at that hour are usually not late

Weather at each end

IAD (origin) Gusts8 kt Ceiling200 ft Visibility1 mi Precip0.29 in

AUS (destination) Gusts25 kt Ceiling700 ft 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 637 · IAD → AUS

Odds over time

How late will it get to AUS?