✈ SYD → LHR
21H 1M, 10,576 MILES. YOUR ANCESTORS WALKED LESS THAN THIS.
Flight from Sydney to London
From Kingsford Smith (SYD), Australia Oceania → Heathrow (LHR), United Kingdom Europe
How long is the flight from Sydney to London?
A nonstop flight from Sydney (SYD) to London (LHR) takes about 21 hours 1 minutes, covering a great-circle distance of 10,576 miles (17,020 km). Actual scheduled time varies by airline, routing, and wind — expect ±15 to 30 minutes from this estimate.
Avg flight time
21h 1m
Nonstop, scheduled
Distance
10,576 mi
17,020 km · great-circle
Avg speed
810 km/h
Door-to-door including taxi
Time zones & jet lag
Sydney timezone
UTC+10
Australia/Sydney
London timezone
UTC+1
Europe/London
Time difference
-9h
9 hours behind
Jet lag (rough)
~6.3d
Westward — easier
CO₂ footprint per passenger
Economy class, single passenger. Source: DEFRA 2024 averages.
This flight emits roughly 3.6× the CO₂ of an equivalent train trip and 0.9× a car driven alone over the same distance.