Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

DAL21

Operated by Delta Air Lines

Live map

Live map filtered to DAL21. Shown when the flight is currently airborne.

Route airports View route page →

Departure

LHR EGLL VFR

London Heathrow Airport

London, GB

Local time
07:30 GMT+1
Timezone
Europe/London
Type
Large Airport
Elevation
83 ft
Coordinates
51.4707, -0.4599

cloud Weather

Wind
360° / 5 kt
Visibility
6 SM
Ceiling
CLR
Temp / Dew
17°C / 8°C
Altimeter
30.15 inHg

Obs: 2026-05-30T05:50:00.000Z

Raw METAR / TAF 
METAR EGLL 300550Z AUTO 36005KT 330V040 9999 NCD 17/08 Q1021

TAF EGLL 300456Z 3006/3112 VRB04KT CAVOK BECMG 3014/3017 28010KT BECMG 3104/3107 BKN030 PROB30 TEMPO 3105/3108 BKN014

flight Live Traffic

flight_takeoff 25 Departures
flight_land 66 Arrivals

Arrival

SEA KSEA VFR

Seattle–Tacoma International Airport

Seattle, US

Local time
23:30 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
433 ft
Coordinates
47.4479, -122.3103

cloud Weather

Wind
30° / 10 kt
Visibility
10 SM
Ceiling
BKN 3,300 ft, OVC 4,200 ft
Temp / Dew
11°C / 7°C
Altimeter
30.15 inHg

Obs: 2026-05-30T05:53:00.000Z

Raw METAR / TAF 
METAR KSEA 300553Z 03010KT 10SM BKN033 OVC042 11/07 A3015 RMK AO2 SLP217 T01110067 10150 20106 51016 $

TAF KSEA 300520Z 3006/3112 01009KT P6SM OVC035 TEMPO 3006/3009 -SHRA FM301200 14005KT P6SM BKN030 FM301900 28006KT P6SM BKN070 FM302200 31008KT P6SM SCT070 BKN250

flight Live Traffic

flight_takeoff 290 Departures
flight_land 334 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 A4EACB LHR → SEA May 29, 17:05 UTCMay 30, 02:35 UTC9h 30m - -
2026-05-28 A4D838 LHR → SEA May 28, 17:25 UTCMay 29, 02:45 UTC9h 20m - -
2026-05-27 A4F239 LHR → SEA May 27, 17:50 UTCMay 28, 03:35 UTC9h 45m - -
2026-05-26 A4F239 LHR → SEA May 26, 17:59 UTCMay 27, 02:14 UTC8h 15m - -
2026-05-26 A4F239 LHR → SEA May 26, 17:57 UTCMay 27, 03:43 UTC9h 46m +77m +34m
2026-05-25 A54137 LHR → SEA May 25, 17:10 UTCMay 25, 21:45 UTC4h 35m - -
2026-05-25 A54137 LHR → SEA May 25, 17:06 UTCMay 26, 02:40 UTC9h 34m +21m +8m
2026-05-24 A4CE71 LHR → SEA May 24, 18:00 UTCMay 25, 03:20 UTC9h 20m - -
2026-05-23 A4C703 LHR → SEA May 23, 17:05 UTCMay 24, 02:25 UTC9h 21m - -
2026-05-22 A53612 LHR → SEA May 22, 17:05 UTCMay 22, 18:05 UTC1h 0m - -
2026-05-22 A53612 LHR → SEA May 22, 17:00 UTCMay 23, 02:08 UTC9h 8m +15m +24m
2026-05-21 A4BF95 LHR → SEA May 21, 17:05 UTCMay 22, 02:10 UTC9h 5m - -
2026-05-21 A4BF95 LHR → SEA May 21, 17:01 UTCMay 22, 02:09 UTC9h 8m +21m +11m
2026-05-20 A4FFB7 LHR → SEA May 20, 17:00 UTCMay 20, 19:40 UTC2h 40m - -
2026-05-20 A4FFB7 LHR → SEA May 20, 16:59 UTCMay 21, 02:15 UTC9h 16m +19m +20m
2026-05-19 A52AED LHR → SEA May 19, 17:05 UTCMay 19, 17:15 UTC10m - -
2026-05-19 A52AED LHR → SEA May 19, 17:00 UTCMay 20, 01:59 UTC8h 59m +20m +15m
2026-05-18 A51601 LHR → SEA May 18, 17:10 UTCMay 18, 18:20 UTC1h 10m - -
2026-05-18 A51601 LHR → SEA May 18, 17:08 UTCMay 19, 02:27 UTC9h 19m +23m +7m
2026-05-18 A51601 LHR → SEA May 18, 17:08 UTCMay 19, 02:24 UTC9h 16m +23m +4m
2026-05-17 A4E35F LHR → SEA May 17, 18:05 UTCMay 18, 03:15 UTC9h 10m - -
2026-05-16 A4DFA6 LHR → SEA May 16, 17:01 UTCMay 17, 02:15 UTC9h 14m - -
2026-05-16 A4DFA6 LHR → SEA May 16, 16:58 UTCMay 17, 02:03 UTC9h 5m +18m +29m
2026-05-15 A52736 LHR → SEA May 15, 18:05 UTCMay 16, 03:15 UTC9h 10m - -
2026-05-14 A52736 LHR → SEA May 14, 17:35 UTCMay 14, 18:45 UTC1h 10m - -
2026-05-14 A52736 LHR → SEA May 14, 17:31 UTCMay 15, 03:04 UTC9h 33m +46m +13m
2026-05-13 A4F5F0 LHR → SEA May 13, 17:15 UTCMay 13, 18:00 UTC45m - -
2026-05-13 A4F5F0 LHR → SEA May 13, 17:10 UTCMay 14, 02:40 UTC9h 30m +25m +20m
2026-05-13 A4F5F0 LHR → SEA May 13, 17:10 UTCMay 14, 02:47 UTC9h 37m +25m +27m
2026-05-12 A53612 LHR → SEA May 12, 17:00 UTCMay 13, 02:40 UTC9h 40m - -

Performance history

Flights tracked
89 showing last 30
Avg arrival delay
+18m
On-time arrival
50% 50% on time
Aircraft used
15

Monthly activity 2 months

Month Flights tracked
May 2026 44
April 2026 45

DAL21 frequently asked

Where does flight DAL21 fly?
DAL21 (Delta Air Lines) flies from LHR to SEA. View the full route page.
How long is flight DAL21?
Based on observed flights, DAL21 takes on average 7h 31m from takeoff to landing.
How often does DAL21 fly?
DAL21 has been observed flying several times a week in our tracking data. We've recorded 89 flights under this callsign.
Is flight DAL21 usually on time?
Across recent flights, DAL21 arrives with an average 18-minute delay. 50% of flights arrive within 15 minutes of schedule.
What aircraft operates flight DAL21?
DAL21 has been operated by 15 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track DAL21 live?
Yes. When DAL21 is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.