Delta Air Lines DL21 Flight Status for 25 September 2026
Delta Air Lines
DL21.Airbus A330-941
Estimated
17:45 BST
Scheduled
LHR · T3
London Heathrow Airport, London, United Kingdom
10h 25m
Direct
20:10 PDT
Scheduled
SEA
Seattle Tacoma International Airport, Seattle, United States
FLIGHT PERFORMANCE
28%
On-Time
Based on data for the past 7 days
DL21 Flight Information
Type
International Flight
Current Status
Estimated
Route
Departure London (LHR), United Kingdom and arriving at Seattle (SEA), United States
Airline
Delta Air Lines (DL)
Aircraft
Airbus A330-941
Flight Duration
10 hour 25 minutes
Flight Distance
7701 kms
Flight History for DL21
Historical records show that the last DL21 flight departed on Wed, Sep 23 from LHR at approximately 18:05. This flight is expected to arrive in SEA at 20:16.
| DATE | ROUTE | AIRCRAFT | DEPARTURE | ARRIVAL | STATUS |
|---|---|---|---|---|---|
| Wed, Sep 23 | London (LHR) → Seattle (SEA) | A339 | 18:05 | 20:16 | Landed |
| Tue, Sep 22 | London (LHR) → Seattle (SEA) | A339 | 18:22 | 20:28 | Landed |
| Mon, Sep 21 | London (LHR) → Seattle (SEA) | A339 | 18:08 | 20:02 | Landed |
| Sun, Sep 20 | London (LHR) → Seattle (SEA) | A339 | 18:51 | 20:35 | Landed |
| Sat, Sep 19 | London (LHR) → Seattle (SEA) | A339 | 17:59 | 19:27 | Landed |
| Fri, Sep 18 | London (LHR) → Seattle (SEA) | A339 | 18:01 | 19:26 | Landed |
| Thu, Sep 17 | London (LHR) → Seattle (SEA) | A339 | 17:48 | 19:29 | Landed |
DL21 On-Time Performance
Based on the average performance of this flight over the last 7 trips, the on-time departure rate of DL21 is 28% (Late on average 19 minutes), and the on-time arrival rate is 85% (Late on average 12 minutes).
On-Time Departures
28%
Punctuality
Late on average
19
minutes
Early
0%
On time
28%
30 mins late
57%
60 mins late
14%
90 mins late
0%
Cancelled
0%
On-Time Arrivals
85%
Punctuality
Late on average
12
minutes
Early
71%
On time
14%
30 mins late
14%
60 mins late
0%
90 mins late
0%
Cancelled
0%
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Flight Tracker FAQs
-
Q: Which terminal and gate does DL21 depart from and arrive at?
Ans: DL21 departs from Terminal T3, Gate 21 at London Heathrow Airport and arrives at Terminal , Gate at Seattle Tacoma International Airport. -
Q: What time will DL21 land at Seattle Tacoma International Airport?
Ans: The estimated landing time for DL21 at Seattle Tacoma International Airport is 20:10 (PDT). -
Q: What is the total flight time for DL21?
Ans: The total scheduled flight duration from London Heathrow Airport to Seattle Tacoma International Airport is 10h 25m.
