Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

AMERICAN · FLIGHT AA 1639 SCHEDULED · TYPICAL SCHEDULE

Monday, October 5 Tomorrow

AA 1639 · BZN → ORD

departs 5:03 PM MT · arrives 9:30 PM CT

Forecast issued Sun 12:00 PM ET · 31h before departure

Arrive at ORD more than 15 minutes late?

25% chance · ±3 pts +7 pts · 24h

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

How late will it get to ORD?

On time or early
74%
15–30 min late
11%
30 min–1 hour late
7%
1–2 hours late
3%
Over 2 hours late
3%
Cancelled
1%

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

What’s moving the odds

↑ AA's recent on-time record

↑ Arrivals into ORD at that hour are often late

↑ This flight has been late 30% of the time recently

↓ Mostly benign weather forecast at ORD

↓ Mondays in October are usually quieter than average

Weather at each end

BZN (origin) Gusts11 kt Ceilingnone (clear) Visibility10+ mi Precipnone

ORD (destination) Gusts8 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.

AA 1639 · BZN → ORD

Odds over time

How late will it get to ORD?