Ottawa to London — Time Difference
Live clocks · Full 24-hour table · Canada → United Kingdom
Time Difference: Ottawa vs London
London is 5 hours ahead of Ottawa. Ottawa is in Eastern Daylight Time (EDT, UTC-4) and London is in British Summer Time (GMT+1, UTC+1).
Use the table below to find the equivalent London time for any hour in Ottawa. Click any row to see the full conversion page for that hour.
Business Hours — Ottawa to London
"Good" = both cities within business hours (9 AM–5 PM)
Full 24-Hour Table — Ottawa to London
Frequently Asked Questions
What is the time difference between Ottawa and London?
London is 5 hours ahead of Ottawa. Ottawa uses Eastern Daylight Time (EDT, UTC-4) and London uses British Summer Time (GMT+1, UTC+1).
What time is it in London when it is 9 AM in Ottawa?
9 AM in Ottawa (EDT) equals 2 PM in London (GMT+1).
Is Ottawa ahead or behind London?
London is 5 hours ahead of Ottawa.
What is the best time to call from Ottawa to London?
The best time to call from Ottawa to London is between 9 AM–12 PM Ottawa time, when London is also within normal working hours (9 AM–5 PM).
Time Zones
Ottawa
Eastern Daylight Time
EDT · UTC-4
London
British Summer Time
GMT+1 · UTC+1
Reverse Conversion
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