London to Ottawa Time Difference
Ottawa is 5 hours behind London. When it is noon in London, it is 07:00 in Ottawa.
London (UTC+1) → Toronto (UTC-4)
🕐 Interactive Time Explorer
When it's 01:00 in London, it's 20:00 in Ottawa
Drag the slider to see corresponding times in both cities
🤝 Best Meeting Times
London & Ottawa✓ Perfect Match (3 hours)
◐ Extended Hours (7 hours)
✈️ Travel Information
Distance
5,361 km
Est. Flight Time
~7.3h
Time Difference
-5h
Work Hours Overlap
3h
Limited
🔴 Office Closed
Today 14:00
14:00 - 17:00
⏰ Quick Conversion
06:00
London
01:00
Ottawa
09:00
London
04:00
Ottawa
12:00
London
07:00
Ottawa
15:00
London
10:00
Ottawa
18:00
London
13:00
Ottawa
21:00
London
16:00
Ottawa
00:00
London
19:00
Ottawa (-1)
03:00
London
22:00
Ottawa (-1)
Frequently Asked Questions
How many hours is London ahead of Ottawa?
Ottawa is 5 hours behind London. When it is 12:00 noon in London, it is 07:00 in Ottawa. London operates on Europe/London (UTC+1), while Ottawa uses America/Toronto (UTC-4).
What is the best time to call Ottawa from London?
There are 4 hours of overlapping business time (9 AM–5 PM) between London and Ottawa. The best window is 14:00–18:00 London time (09:00–13:00 in Ottawa).
Does the London to Ottawa time difference change throughout the year?
The time difference can shift by up to one hour when either city observes Daylight Saving Time (DST). DST transition dates differ between countries — typically March/April in the Northern Hemisphere and October in the Southern Hemisphere. Always verify the live difference above when scheduling important meetings near DST changeover dates.
Flying between London and Ottawa
The distance between London and Ottawa is approximately 5,361 km. A direct flight typically takes around 7.3 hours. Your arrival clock will show local Ottawa time — use our Flight Time Calculator to predict exact arrival times.