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DAL21

LHR → SEA · AIRBUS A-330-900 · Delta Air Lines

For travellers

Departure · London (LHR)

Terminal 3
Scheduled 29 Sep 17:45
Board status: Departed 17:50
Airborne since 29 Sep 17:50 (ADS-B)

Arrival · Seattle (SEA)

Gate S1
Scheduled 29 Sep 20:10 · Estimated 29 Sep 19:13 · early
Board status: Landed
Landed 29 Sep 19:50 (ADS-B)

Board data from heathrow, sea, updated 2382 min ago; times local to each airport.

Flight

Status
Completed
Arrival confirmed via
ADS-B (ground reading)
Departure
London Heathrow Airport (LHR) — London, United Kingdom
Scheduled departure
2026-09-29 16:45 UTC
Departed
2026-09-29 16:50 UTC
Arrival
Seattle Tacoma International Airport (SEA) — Seattle, United States
Scheduled arrival
2026-09-30 03:10 UTC
Estimated arrival
2026-09-30 02:13 UTC
Also flies as
DL21
Codeshares
AF3586, KL6022, SK3985, SV4416, VS4036
Distance flown
7951 km
Straight-line distance
7702 km
Approach distance
92 km

Aircraft

Registration
N408DX
Type
AIRBUS A-330-900
Seats
281 total (168 Economy, 56 Delta Comfort+, 28 Delta Premium Select, 29 Delta One)
CO2 (EMEP est., total)
355.5 t (3091 kg/pax Business, 1226 kg/pax Premium Economy, 1033 kg/pax Economy)

Altitude & speed

Max altitude
40,025 ft
Max ground speed
517 kt
Tracked
10h 0m · 7,941 km
Altitude (ft, max 40,025)
021,61443,2270m1h 0m2h 0m3h 0m4h 0m5h 0m6h 0m7h 0m8h 0m9h 0m10h 0m
Ground speed (kt, max 517)
02795580m1h 0m2h 0m3h 0m4h 0m5h 0m6h 0m7h 0m8h 0m9h 0m10h 0m
Altitude (ft, max 40,025)
021,61443,2270m2h 0m4h 0m6h 0m8h 0m10h 0m
Ground speed (kt, max 517)
02795580m2h 0m4h 0m6h 0m8h 0m10h 0m

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

Delta Air Lines (DAL)

Latest flights

DepartedFlightRouteRegAircraftStatusDistance
2026-10-01 17:07 UTC DAL21 LHR → SEA
London → Seattle
 N407DX AIRBUS A-330-900 Completed 7875 km
2026-09-29 16:50 UTC DAL21 LHR → SEA
London → Seattle
 N408DX AIRBUS A-330-900 Completed 7951 km
2026-09-28 16:52 UTC DAL21 LHR → SEA
London → Seattle
 N408DX AIRBUS A-330-900 Completed 7832 km
2026-09-27 17:53 UTC DAL21 LHR → SEA
London → Seattle
 N412DX AIRBUS A-330-900 Completed 7913 km
2026-09-26 17:09 UTC DAL21 LHR → SEA
London → Seattle
 N428DX AIRBUS A-330-900 Completed 7835 km
2026-09-25 17:20 UTC DAL21 LHR → SEA
London → Seattle
 N433DX AIRBUS A-330-900 Completed 7900 km
2026-09-24 16:59 UTC DAL21 LHR → SEA
London → Seattle
 N404DX AIRBUS A-330-900 Completed 7992 km
2026-09-23 17:04 UTC DAL21 LHR → SEA
London → Seattle
 N414DZ AIRBUS A-330-900 Completed 7992 km
2026-09-22 17:22 UTC DAL21 LHR → SEA
London → Seattle
 N409DX AIRBUS A-330-900 Completed 7935 km
2026-09-21 17:07 UTC DAL21 LHR → SEA
London → Seattle
 N438DX AIRBUS A-330-900 Completed 8077 km
2026-09-20 17:50 UTC DAL21 LHR → SEA
London → Seattle
 N416DX AIRBUS A-330-900 Completed 8059 km
2026-09-19 16:59 UTC DAL21 LHR → SEA
London → Seattle
 N422DZ AIRBUS A-330-900 Completed 7955 km
2026-09-18 17:01 UTC DAL21 LHR → SEA
London → Seattle
 N411DX AIRBUS A-330-900 Completed 7966 km
2026-09-17 16:31 UTC DAL21 LHR → SEA
London → Seattle
 N429DX AIRBUS A-330-900 Completed 8171 km
2026-09-16 17:10 UTC DAL21 ORM → ?
Northampton → ?
 — — Incomplete (signal lost) 33 km
2026-09-16 16:59 UTC DAL21 LHR → SEA
London → Seattle
 N419DX AIRBUS A-330-900 Completed 8070 km
2026-09-15 17:09 UTC DAL21 LHR → SEA
London → Seattle
 N406DX AIRBUS A-330-900 Completed 8066 km
2026-09-14 17:11 UTC DAL21 LHR → SEA
London → Seattle
 N428DX AIRBUS A-330-900 Completed 7998 km
2026-09-13 17:57 UTC DAL21 LHR → SEA
London → Seattle
 N416DX AIRBUS A-330-900 Completed 8014 km
2026-09-12 17:13 UTC DAL21 LHR → SEA
London → Seattle
 N416DX AIRBUS A-330-900 Completed 7894 km
2026-09-11 16:59 UTC DAL21 LHR → SEA
London → Seattle
 N416DX AIRBUS A-330-900 Completed 8078 km
2026-09-11 03:21 UTC DAL21 YEG → SEA
Edmonton → Seattle
 N433DX AIRBUS A-330-900 Completed 1028 km
2026-09-10 16:53 UTC DAL21 LHR → YEG
London → Edmonton
 N433DX AIRBUS A-330-900 Completed 7129 km
2026-09-09 17:04 UTC DAL21 LHR → SEA
London → Seattle
 N411DX AIRBUS A-330-900 Completed 8025 km
2026-09-07 16:47 UTC DAL21 LHR → SEA
London → Seattle
 N407DX AIRBUS A-330-900 Completed 8080 km
2026-09-06 17:51 UTC DAL21 LHR → SEA
London → Seattle
 — — Incomplete (signal lost) ~7694 km est. (103 km recorded)
2026-09-06 17:43 UTC DAL21 LHR → SEA
London → Seattle
 N424DX AIRBUS A-330-900 Completed 7942 km
2026-09-05 16:54 UTC DAL21 LHR → SEA
London → Seattle
 N437DX AIRBUS A-330-900 Completed 7979 km
2026-09-04 17:27 UTC DAL21 LHR → SEA
London → Seattle
 N401DZ AIRBUS A-330-900 Completed 7839 km
2026-09-03 16:56 UTC DAL21 LHR → SEA
London → Seattle
 N410DZ AIRBUS A-330-900 Completed 8053 km
2026-09-02 16:54 UTC DAL21 LHR → SEA
London → Seattle
 N414DZ AIRBUS A-330-900 Completed 7953 km
2026-09-01 17:04 UTC DAL21 LHR → SEA
London → Seattle
 N435DX AIRBUS A-330-900 Completed 8090 km
2026-09-01 02:32 UTC DAL21 SEA → SEA
Seattle → Seattle
 N409DX AIRBUS A-330-900 Completed ~5 km est. (3 km recorded)
2026-08-31 16:29 UTC DAL21 LHR → SEA
London → Seattle
 N409DX AIRBUS A-330-900 Completed 8075 km
2026-08-30 17:59 UTC DAL21 LHR → SEA
London → Seattle
 N433DX AIRBUS A-330-900 Completed 8025 km
2026-08-29 17:00 UTC DAL21 LHR → SEA
London → Seattle
 N428DX AIRBUS A-330-900 Completed 7939 km
2026-08-28 18:01 UTC DAL21 LHR → SEA
London → Seattle
 N436DX AIRBUS A-330-900 Completed 8139 km
2026-08-27 18:22 UTC DAL21 LHR → SEA
London → Seattle
 N432DX AIRBUS A-330-900 Completed 8124 km
2026-08-26 17:06 UTC DAL21 LHR → SEA
London → Seattle
 N414DZ AIRBUS A-330-900 Completed 7980 km
2026-08-25 17:00 UTC DAL21 LHR → SEA
London → Seattle
 N414DZ AIRBUS A-330-900 Completed 7917 km
2026-08-24 16:53 UTC DAL21 LHR → SEA
London → Seattle
 N434DX AIRBUS A-330-900 Completed 7974 km
2026-08-23 18:03 UTC DAL21 LHR → SEA
London → Seattle
 N414DZ AIRBUS A-330-900 Completed 8067 km
2026-08-22 17:00 UTC DAL21 LHR → SEA
London → Seattle
 N426DZ AIRBUS A-330-900 Completed 9528 km
2026-08-21 17:10 UTC DAL21 LHR → SEA
London → Seattle
 N439DX AIRBUS A-330-900 Completed 9055 km
2026-08-20 17:11 UTC DAL21 LHR → SEA
London → Seattle
 N412DX AIRBUS A-330-900 Completed 10016 km
2026-08-19 17:07 UTC DAL21 LHR → SEA
London → Seattle
 N412DX AIRBUS A-330-900 Completed 11385 km
2026-08-18 16:38 UTC DAL21 LHR → SEA
London → Seattle
 N412DX AIRBUS A-330-900 Completed 12953 km
2026-08-18 03:33 UTC DAL21 SEA → SEA
Seattle → Seattle
 N429DX AIRBUS A-330-900 Completed ~2 km est. (0 km recorded)
2026-08-17 16:46 UTC DAL21 LHR → SEA
London → Seattle
 N429DX AIRBUS A-330-900 Completed 8933 km
2026-08-16 17:34 UTC DAL21 LHR → SEA
London → Seattle
 N426DZ AIRBUS A-330-900 Completed 8867 km

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