Time Zone: London to Istanbul
Time zone difference between London and Istanbul. UTC offsets and best meeting times.
Time difference: London and Istanbul
London is on GMT+1 (UTC+1) and Istanbul is on GMT+3 (UTC+3), a gap of 2 hours. Istanbul is ahead — so when it is 12:00 in London, it is already 14:00 in Istanbul. Going the other way, when it is 12:00 in Istanbul, it is only 10:00 in London.
For calls, video meetings or messages between London and Istanbul, aim for the overlap in normal waking hours on both sides rather than assuming a shared 9-to-5 — with a 2h gap, one side may need to join early morning or late evening. Business hours in London typically start later than in Istanbul, so scheduling around late morning to early afternoon in the behind city usually finds the widest overlap.
Note that this 2h difference reflects current UTC offsets and can shift by an hour around daylight saving time (DST) clock changes if only one city observes it. If you are flying this route, check our jet lag calculator for London to Istanbul to plan sleep adjustment, and the flight time tool to work out local arrival time.
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Frequently Asked Questions
What is the time difference between London and Istanbul?
The time difference between London (UTC+1) and Istanbul (UTC+3) is 2 hours. Istanbul is 2h ahead London.
What time zone is Istanbul in?
Istanbul is in the GMT+3 time zone (UTC+3).
What time zone is London in?
London is in the GMT+1 time zone (UTC+1).
Is Istanbul ahead of or behind London?
Istanbul is ahead. Istanbul is 2 hours ahead of London, so clocks in London show an earlier time than in Istanbul.
When it's noon in London, what time is it in Istanbul?
When it is 12:00 in London (UTC+1), it is 14:00 in Istanbul (UTC+3).
Does the time difference between London and Istanbul change with daylight saving time?
Possibly. This 2h difference is based on current UTC offsets. If only one of London or Istanbul observes daylight saving time (DST), the gap can shift by an hour on clock-change weekends in spring and autumn — worth double-checking close to your travel or call date.