Schedule: the flights that flew on Wednesday, Oct 7, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

AMERICAN · FLIGHT AA 91 SCHEDULED · TYPICAL SCHEDULE

Wednesday, October 14

AA 91 · LHR → ORD

departs 2:59 PM BST · arrives 5:27 PM CT

Forecast issued Mon 4:00 AM ET · 54h before departure

Arrive at ORD more than 15 minutes late?

35% chance · ±4 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
64%
15–30 min late
15%
30 min–1 hour late
13%
1–2 hours late
4%
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

↑ Arrivals into ORD at that hour are often late

↑ Cloud base down to 200 ft, 0.3 in of rain forecast at ORD that day

↑ Later flights pick up delays from earlier in the day

↓ Wednesdays in October are usually quieter than average

↓ Mostly benign weather forecast at LHR

Weather at each end

LHR (origin) Gusts8 kt Ceilingnone (clear) Visibility10+ mi Precipnone

ORD (destination) Gusts16 kt Ceiling200 ft Visibility3 mi Precip0.43 in

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 91 · LHR → ORD

Odds over time

How late will it get to ORD?