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 IFR

London Heathrow Airport

London, GB

Local time
06:20 GMT+1
Timezone
Europe/London
Type
Large Airport
Elevation
83 ft
Coordinates
51.4707, -0.4599

cloud Weather

Wind
180° / 8 kt
Visibility
6 SM
Ceiling
BKN 800 ft
Temp / Dew
12°C / 11°C
Altimeter
30.00 inHg

Obs: 2026-04-15T04:50:00.000Z

Raw METAR / TAF 
METAR EGLL 150450Z COR AUTO 18008KT 9999 BKN008 12/11 Q1016 NOSIG

TAF EGLL 150458Z 1506/1612 18010KT 9999 BKN014 TEMPO 1506/1510 6000 -RA SCT007 BKN009 PROB30 TEMPO 1506/1508 2500 RADZ BKN004 BECMG 1510/1513 SCT025 TEMPO 1511/1519 6000 RA SHRA PROB40 TEMPO 1513/1518 21016G26KT 3000 +SHRA BKN014 PROB30 TEMPO 1602/1608 BKN012 BECMG 1609/1612 24011KT PROB30 TEMPO 1610/1612 7000 SHRA

flight Live Traffic

flight_takeoff 60 Departures
flight_land 83 Arrivals

Arrival

SEA KSEA MVFR

Seattle–Tacoma International Airport

Seattle, US

Local time
22:20 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
433 ft
Coordinates
47.4479, -122.3103

cloud Weather

Wind
200° / 10G17 kt
Visibility
6 SM
Ceiling
OVC 2,100 ft
Temp / Dew
8°C / 6°C
Altimeter
29.76 inHg
Wx
-RA BR

Obs: 2026-04-15T04:53:00.000Z

Raw METAR / TAF 
METAR KSEA 150453Z 20010G17KT 6SM -RA BR OVC021 08/06 A2976 RMK AO2 SLP085 P0007 T00780061

TAF KSEA 150301Z 1503/1606 18014G20KT 6SM -RA BKN015 OVC025 FM150400 18010G20KT P6SM VCSH SCT025 OVC035 FM150900 15009KT P6SM BKN040 FM151500 21007KT P6SM VCSH SCT025 BKN035 FM151900 22010G18KT P6SM -SHRA SCT030 BKN040 FM152300 23009KT P6SM -RA SCT025 BKN035

flight Live Traffic

flight_takeoff 214 Departures
flight_land 211 Arrivals

Recent history last 4

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-04-13 A4EE82 LHR → SEA Apr 13, 21:20 UTCApr 13, 22:00 UTC40m - -
2026-04-13 A4EE82 LHR → SEA Apr 13, 16:55 UTCApr 14, 02:02 UTC9h 7m +15m +9m
2026-04-13 A544EE LHR → SEA Apr 13, 01:45 UTCApr 13, 03:00 UTC1h 15m - -
2026-04-12 A544EE LHR → SEA Apr 12, 17:50 UTCApr 13, 02:56 UTC9h 6m +20m +24m

Performance history

Flights tracked
4
Avg arrival delay
+17m
On-time arrival
50% 50% on time
Aircraft used
2

Monthly activity 1 month

Month Flights tracked
April 2026 4

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 5h 2m from takeoff to landing.
How often does DAL21 fly?
DAL21 has been observed flying occasionally in our tracking data. We've recorded 4 flights under this callsign.
Is flight DAL21 usually on time?
Across recent flights, DAL21 arrives with an average 17-minute delay. 50% of flights arrive within 15 minutes of schedule.
What aircraft operates flight DAL21?
DAL21 has been operated by 2 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.