Houston to Ottawa Time Difference
Ottawa is 1 hour ahead of Houston. When it's 07:56:47 AM in Houston, it's 08:56:47 AM in Ottawa.
How Many Hours Ahead Is Ottawa From Houston?
Ottawa is 1 hour ahead of Houston. So Houston is 1 hour behind Ottawa looking the other way — the same gap, described from the other end.
In practice that means a working day in Houston starts when it is already 10:00 AM in Ottawa. That gap holds all year — no clock change in either city moves it.
Best Time to Call Houston and Ottawa
Both cities are inside normal business hours between 9:00 AM and 4:00 PM in Houston — that's 10:00 AM to 5:00 PM in Ottawa. That's a 7-hour window, so a call fits comfortably in either side's working day.
both at work Houston only Ottawa only neither — hours shown along the strip are Houston local time.
Convert a Specific Time
Pick any date and time in Houston to see the exact equivalent in Ottawa.
Common Times Converted
Houston time on the left, Ottawa time on the right.
Houston to Ottawa: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Houston. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Houston | Ottawa | Working hours |
|---|---|---|
| 12:00 AM | 1:00 AM | — |
| 1:00 AM | 2:00 AM | — |
| 2:00 AM | 3:00 AM | — |
| 3:00 AM | 4:00 AM | — |
| 4:00 AM | 5:00 AM | — |
| 5:00 AM | 6:00 AM | — |
| 6:00 AM | 7:00 AM | — |
| 7:00 AM | 8:00 AM | — |
| 8:00 AM | 9:00 AM | Ottawa only |
| 9:00 AM | 10:00 AM | Both cities |
| 10:00 AM | 11:00 AM | Both cities |
| 11:00 AM | 12:00 PM | Both cities |
| 12:00 PM | 1:00 PM | Both cities |
| 1:00 PM | 2:00 PM | Both cities |
| 2:00 PM | 3:00 PM | Both cities |
| 3:00 PM | 4:00 PM | Both cities |
| 4:00 PM | 5:00 PM | Houston only |
| 5:00 PM | 6:00 PM | — |
| 6:00 PM | 7:00 PM | — |
| 7:00 PM | 8:00 PM | — |
| 8:00 PM | 9:00 PM | — |
| 9:00 PM | 10:00 PM | — |
| 10:00 PM | 11:00 PM | — |
| 11:00 PM | 12:00 AM next day | — |
Understanding the Houston – Ottawa Time Difference
Houston runs on America/Chicago, currently CDT (UTC-5:00). Ottawa runs on America/Toronto, currently EDT (UTC-4:00). The gap of 1 hour is simply the distance between those two offsets.
This difference holds steady all year — no clock change in either city moves it. A meeting time that works in January works just as well in July.
Houston today
Ottawa today
Frequently Asked Questions
What is the time difference between Houston and Ottawa?
Ottawa is currently 1 hour ahead of Houston. This difference holds all year — no clock change in either city moves it.
How many hours ahead is Ottawa from Houston?
Ottawa is 1 hour ahead of Houston. Looking at it the other way, Houston is 1 hour behind Ottawa.
What time is it in Ottawa when it is 9:00 AM in Houston?
When it is 9:00 AM in Houston, it is 10:00 AM in Ottawa.
Is Ottawa ahead of or behind Houston?
Ottawa is 1 hour ahead of Houston. Ottawa reaches each point in the day first, so its working day is already finishing while Houston is still getting started.
What is the best time to call between Houston and Ottawa?
Between 9:00 AM and 4:00 PM Houston time, which is 10:00 AM to 5:00 PM in Ottawa. Both cities are inside normal business hours during that window.
Does the time difference between Houston and Ottawa change during the year?
No. The difference between Houston and Ottawa stays fixed all year round — no clock change in either city moves it.
What time zones are Houston and Ottawa in?
Houston uses the America/Chicago time zone, currently CDT (UTC-5:00). Ottawa uses America/Toronto, currently EDT (UTC-4:00).