Schedule: the flights that flew on Sunday, Oct 25, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 20SCHEDULED · TYPICAL SCHEDULE
DL 20 · SEA → LHR
departs 5:51 PM PT · arrives 11:13 AM GMT
Forecast issued Fri 7:00 PM ET · 51h before departure
Odds over time
Arrive at LHR more than 15 minutes late?
20%chance · ±2 pts+1 pt · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to LHR?
On time or early
79%
15–30 min late
6%
30 min–1 hour late
9%
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%.