Ottawa to Seattle Time Difference
Seattle is 3 hours behind Ottawa. When it's 12:27:01 PM in Ottawa, it's 09:27:01 AM in Seattle.
How Many Hours Behind Is Seattle From Ottawa?
Seattle is 3 hours behind Ottawa. So Ottawa is 3 hours ahead of Seattle looking the other way — the same gap, described from the other end.
In practice that means a working day in Ottawa starts when it is already 6:00 AM in Seattle. The gap is not fixed all year: it becomes 2 hours on Sunday, November 1, 2026, when Ottawa changes its clocks.
Best Time to Call Ottawa and Seattle
Both cities are inside normal business hours between 12:00 PM and 5:00 PM in Ottawa — that's 9:00 AM to 2:00 PM in Seattle. That's a 5-hour window, so a call fits comfortably in either side's working day.
both at work Ottawa only Seattle only neither — hours shown along the strip are Ottawa local time.
Convert a Specific Time
Pick any date and time in Ottawa to see the exact equivalent in Seattle.
Common Times Converted
Ottawa time on the left, Seattle time on the right.
Ottawa to Seattle: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Ottawa. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Ottawa | Seattle | Working hours |
|---|---|---|
| 12:00 AM | 9:00 PM prev day | — |
| 1:00 AM | 10:00 PM prev day | — |
| 2:00 AM | 11:00 PM prev day | — |
| 3:00 AM | 12:00 AM | — |
| 4:00 AM | 1:00 AM | — |
| 5:00 AM | 2:00 AM | — |
| 6:00 AM | 3:00 AM | — |
| 7:00 AM | 4:00 AM | — |
| 8:00 AM | 5:00 AM | — |
| 9:00 AM | 6:00 AM | Ottawa only |
| 10:00 AM | 7:00 AM | Ottawa only |
| 11:00 AM | 8:00 AM | Ottawa only |
| 12:00 PM | 9:00 AM | Both cities |
| 1:00 PM | 10:00 AM | Both cities |
| 2:00 PM | 11:00 AM | Both cities |
| 3:00 PM | 12:00 PM | Both cities |
| 4:00 PM | 1:00 PM | Both cities |
| 5:00 PM | 2:00 PM | Seattle only |
| 6:00 PM | 3:00 PM | Seattle only |
| 7:00 PM | 4:00 PM | Seattle only |
| 8:00 PM | 5:00 PM | — |
| 9:00 PM | 6:00 PM | — |
| 10:00 PM | 7:00 PM | — |
| 11:00 PM | 8:00 PM | — |
Understanding the Ottawa – Seattle Time Difference
Ottawa runs on America/Toronto, currently EDT (UTC-4:00). Seattle runs on America/Los_Angeles, currently PDT (UTC-7:00). The gap of 3 hours is simply the distance between those two offsets.
Both cities observe Daylight Saving Time, but they don't switch on the same date — so for a few weeks each year the gap between them is different again. The next shift is on Sunday, November 1, 2026, when Ottawa adjusts its clocks and the difference becomes 2 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in Canada · Daylight Saving Time in the United States.
Ottawa today
Seattle today
Frequently Asked Questions
What is the time difference between Ottawa and Seattle?
Seattle is currently 3 hours behind Ottawa. That gap becomes 2 hours on Sunday, November 1, 2026, when Ottawa changes its clocks.
How many hours behind is Seattle from Ottawa?
Seattle is 3 hours behind Ottawa. Looking at it the other way, Ottawa is 3 hours ahead of Seattle.
What time is it in Seattle when it is 9:00 AM in Ottawa?
When it is 9:00 AM in Ottawa, it is 6:00 AM in Seattle.
Is Seattle ahead of or behind Ottawa?
Seattle is 3 hours behind Ottawa. Ottawa reaches each point in the day first, so Seattle is still getting started while the Ottawa working day is finishing.
What is the best time to call between Ottawa and Seattle?
Between 12:00 PM and 5:00 PM Ottawa time, which is 9:00 AM to 2:00 PM in Seattle. Both cities are inside normal business hours during that window.
Does the time difference between Ottawa and Seattle change during the year?
Yes. Both cities observe Daylight Saving Time, and they do not always switch on the same date, so the gap between them shifts during the year. It changes to 2 hours on Sunday, November 1, 2026.
What time zones are Ottawa and Seattle in?
Ottawa uses the America/Toronto time zone, currently EDT (UTC-4:00). Seattle uses America/Los_Angeles, currently PDT (UTC-7:00).