DL1Delta Air Lines · JFK → LHR
live · 3m ago
Route confirmed Delta Air Lines

DL1 New YorkJFK · 20:15 LondonLHR · 08:50

DL1 by Delta Air Lines flies from New York (JFK) to London (LHR) for the Mon, Sep 21 departure.

Right nowOn Time · gate B38
20:15

departs JFK · on schedule

⚖ DL1 typically leaves −1 and lands −54. The air wins minutes back.
Typical gate push−1 minmedian posted departure
Typical arrival−54 minmedian over 15 operations
Wins back in air~53 minmedian gate push vs arrival · how planes make up time → Cancellation0 in 15tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
09-21
−49 arrival
09-20
−8 gate · −63 arrival
09-19
−1 gate · −55 arrival
09-18
−1 gate · −82 arrival
09-17
−3 gate · −78 arrival
09-16
−4 gate · −41 arrival
09-15
−3 gate · −54 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −54 min · 0 cancelled · 15 operations tracked

The route today

live boards
JFKNew YorkOn-time likelyJFK delay board →
LHRLondonOn-time likelyLHR delay board →
JFK→LHRevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
41%Chance of 15+ min delay
5.2%Chance of cancellation
+14 minAvg hub delay right now

Driven mainly by JFK (New York), currently flying MVFR (marginal visual). For this route and airline, under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other New York to London flights today

same route · Delta Air Lines
DL3departs 22:00

If DL1 is cancelled, this is the other Delta Air Lines nonstop flight from New York to London on the same day, with scheduled departure times in JFK local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How DL1 actually runs

Pro Flight Search has tracked every published board update for DL1 across the JFK and LHR boards: schedule changes, gate pushes and actual clocks. Usually lands ~51 min early. Based on 14 confirmed landings · 12/14 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how DL1 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocks

Board log

scheduled → actual, per operation
09-21JFK 20:15LHR 08:50 08:01 (−49)
09-20JFK 20:15 20:07 (−8)LHR 08:50 07:47 (−63)
09-19JFK 20:15 20:14 (−1)LHR 08:50 07:55 (−55)
09-18JFK 20:15 20:14 (−1)LHR 08:50 07:28 (−82)
09-17JFK 20:15 20:12 (−3)LHR 08:50 07:32 (−78)
09-16JFK 20:15 20:11 (−4)LHR 08:50 08:09 (−41)
09-15JFK 20:15 20:12 (−3)LHR 08:50 07:56 (−54)
09-14JFK 20:15 20:14 (−1)LHR 08:50 07:41 (−69)
09-13JFK 20:15 20:25 (+10)LHR 08:50 08:01 (−49)
09-12JFK 20:15 20:31 (+16)LHR 08:50 08:33 (−17)
09-11JFK 20:15 20:10 (−5)LHR 08:50 07:59 (−51)
09-10JFK 20:15 20:24 (+9)LHR 08:50 07:50 (−60)
09-09JFK 20:15 22:07 (+112)LHR 08:50 09:46 (+56)
09-08JFK 20:15 21:23 (+68)LHR 08:50 09:26 (+36)
09-07JFK 20:15 19:58 (−17)LHR 08:50 07:56 (−54)

Board clocks recorded as JFK and LHR published them.

Planning around DL1? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

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Suggested citation

Pro Flight Search — DL1 New York to London on-time performance, measured from the JFK and LHR airport boards.

Canonical URL
https://proflightsearch.com/flight/DL1
How we measure this →