Schedule: the flights that flew on Saturday, Oct 24, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

DELTA · FLIGHT DL 20 SCHEDULED · TYPICAL SCHEDULE

Saturday, October 31 Tomorrow

DL 20 · SEA → LHR

departs 5:50 PM PT · arrives 10:08 AM GMT

Forecast issued Fri 7:00 PM ET · 26h before departure

Arrive at LHR more than 15 minutes late?

18% chance · ±3 pts +0 pts · 24h

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

How late will it get to LHR?

On time or early
82%
15–30 min late
4%
30 min–1 hour late
9%
1–2 hours late
4%
Over 2 hours late
1%
Cancelled
<1%

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

What’s moving the odds

↑ 5pm departures from SEA are often late

↑ This route's recent record

↑ SEA is busy at that time

↓ Mostly benign weather forecast at LHR

↓ Mostly benign weather forecast at SEA

Weather at each end

SEA (origin) Gusts9 kt Ceiling2,700 ft Visibility9 mi Precipnone

LHR (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.

DL 20 · SEA → LHR

Odds over time

How late will it get to LHR?