Istanbul is usually 2 hours ahead of London. London observes daylight saving time and Istanbul does not, so the difference shifts by an hour around the changeovers.

IstanbulLondon

Sunrise 5:49 AMSunset 8:33 PM(local)

Sunrise 5:07 AMSunset 9:07 PM(local)

London: daylight saving timeNow UTC+1. Next change: October 25, 2026 β€” clocks go back 1 hour.
IstanbulUTC+3
LondonUTC+1

πŸ‡ΉπŸ‡· Istanbul

Dialing code+90
Population15,701,602
Coordinates41.01Β°N, 28.95Β°E
Elevation39 m

πŸ‡¬πŸ‡§ London

Dialing code+44
Population8,961,989
Coordinates51.51Β°N, 0.13Β°W
Elevation25 m

Best time for a call: 11:00–18:00 in IstanbulAdd to calendar

Working hours assumed 9:00–18:00.

Frequently asked questions

What is the time difference between Istanbul and London?
Istanbul is 2 hours ahead of London. Use the side-by-side clocks and the day/night strips above to convert any hour between them.
When is the best time to call between Istanbul and London?
The best window to call is 11:00–18:00 Istanbul time, when working hours overlap in both cities. Pick an hour on the strips to add it to your calendar.
Why does the time difference between Istanbul and London change?
Because at least one of Istanbul and London observes daylight saving time, the difference shifts by an hour when one city changes its clocks and the other has not yet (or does not).