Delta Air Lines
Is DL9921 delayed?
Yes, DL9921 landed in Seattle 109 min late, at 21:35 on Oct 23 (as of Oct 24, 04:35 UTC).
109 min late
Official source · Updated
Departure
London
LHR
Actual
Scheduled 18:15
Oct 23
Arrival
Seattle
SEA
Actual
Scheduled 19:47
Oct 23
Times shown in airport local time
Service date: · Scheduled departure date (Europe/London)
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 109 min late
London → Seattle
Is DL9921 usually late?
Period: Oct 15, 2026 – Nov 14, 2026
Percentages and delay figures appear once 10 arrivals are recorded.
On time means arriving no more than 15 minutes after the scheduled time; late means more than 15 minutes after. Cancelled and diverted flights are counted apart from arrivals. Compares scheduled and actual arrival times. Cancelled and diverted flights are left out. Some flights may be missing.
At the airports today
London Heathrow (LHR) departures
- Left more than 15 min late
- 153 of 230
- Cancelled today
- 10
Seattle (SEA) departures
- Left more than 15 min late
- 23 of 31
- Cancelled today
- 34
Related flights
Flight history and details
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Oct 23, 2026Arrived | London | Seattle | 109 |