Schedule: FAA flight plans.
DELTA · FLIGHT DL 21
IN THE AIR (OFF 7:00 PM BST, ETA 8:46 PM PT)
Today
DL 21 · LHR → SEA
took off 7:00 PM BST · expected to land 8:46 PM PT (scheduled 6:52 PM BST → 9:00 PM PT)
Forecast issued Sun 2:00 PM ET · 0h before departure
Odds over time
Arrive at SEA more than 15 minutes late?
3%
chance · ±0 pts
+2 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
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How late will it get to SEA?
LIVE
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On time or early
97%
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15–30 min late
3%
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30 min–1 hour late
<1%
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1–2 hours late
0%
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Over 2 hours late
0%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%; while it’s in the air they come from the FAA’s arrival estimate.