Delta Air Lines
Is DL20 delayed?
Service date: · Scheduled departure date (America/Los_Angeles)
Arrived
7 min early
Official source · Updated
Departure
Seattle
SEA
Actual
Scheduled 21:50
Sep 4
Arrival
London
LHR
Actual
Scheduled 15:35
Sep 5
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 11 min early
SEA → LHR
- 59 min early
SEA → LHR
- 48 min early
SEA → LHR
- 13 min early
SEA → LHR
- 3 min early
SEA → LHR
Flight history and details
Aug 18, 2026 — Sep 17, 2026
- Observed arrivals
- 29
- Arrivals over 15 minutes late
- 2
- Observed cancellations
- 0
- Observed occurrences
- 30
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 17, 2026Arrived | Seattle | London | -11 | |
| Sep 16, 2026Arrived | Seattle | London | -59 | |
| Sep 15, 2026Arrived | Seattle | London | -48 | |
| Sep 14, 2026Arrived | Seattle | London | -13 | |
| Sep 13, 2026Arrived | Seattle | London | -3 | |
| Sep 12, 2026Arrived | Seattle | London | -41 | |
| Sep 11, 2026Arrived | Seattle | London | -57 | |
| Sep 10, 2026Arrived | Seattle | London | -44 | |
| Sep 9, 2026Arrived | Seattle | London | -26 | |
| Sep 8, 2026Arrived | Seattle | London | -43 | |
| Sep 7, 2026Arrived | Seattle | London | -28 | |
| Sep 5, 2026Arrived | Seattle | London | -19 | |
| Sep 4, 2026Arrived | Seattle | London | -7 | |
| Sep 3, 2026Arrived | Seattle | London | 24 | |
| Sep 2, 2026Arrived | Seattle | London | -29 | |
| Sep 1, 2026Arrived | Seattle | London | -31 | |
| Aug 31, 2026Arrived | Seattle | London | -37 | |
| Aug 30, 2026Arrived | Seattle | London | -51 | |
| Aug 29, 2026Arrived | Seattle | London | 23 | |
| Aug 28, 2026Arrived | Seattle | London | -15 | |
| Aug 27, 2026Arrived | Seattle | London | -27 | |
| Aug 26, 2026Arrived | Seattle | London | -19 | |
| Aug 25, 2026Arrived | Seattle | London | -23 | |
| Aug 24, 2026Arrived | Seattle | London | -8 | |
| Aug 23, 2026Arrived | Seattle | London | -21 | |
| Aug 22, 2026Arrived | Seattle | London | -13 | |
| Aug 21, 2026Arrived | Seattle | London | -36 | |
| Aug 20, 2026Arrived | Seattle | London | -3 | |
| Aug 19, 2026Arrived | Seattle | London | -39 |