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Time Difference: Houston to Sydney

🇺🇸HoustonUTC-6
vs
🇦🇺SydneyUTC+10
🇺🇸
Houston, US
Wed, Jun 3
🇦🇺
Sydney, Australia
Wed, Jun 3

Click a time to convert

Time Difference
15 hours
Sydney is 15 hours ahead of Houston
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🇺🇸
Houston
View city page
🇦🇺
Sydney
View city page

Houston vs Sydney timezone guide

Houston (US) uses the America/Chicago timezone at UTC-6, while Sydney (Australia) uses Australia/Sydney at UTC+10. This means Sydney is 16 hours ahead of Houston (based on standard offsets — the live difference above accounts for daylight saving time).

Best meeting times between Houston and Sydney

Standard 9-to-5 working hours in Houston and Sydney do not overlap. To meet synchronously, one side will need to start early or stay late — see the hour-by-hour planner below for the least disruptive options.

Hour-by-hour planner

HoustonSydneyStatus
6am9pmHouston early, Sydney evening
7am10pmHouston early, Sydney late evening
8am11pmHouston early, Sydney late evening
9am12amHouston working hours, Sydney asleep
10am1amHouston working hours, Sydney asleep
11am2amHouston working hours, Sydney asleep
12pm3amHouston working hours, Sydney asleep
1pm4amHouston working hours, Sydney asleep
2pm5amHouston working hours, Sydney asleep
3pm6amOne side outside 9-to-5 but still awake
4pm7amOne side outside 9-to-5 but still awake
5pm8amHouston evening, Sydney early
6pm9amOne side outside 9-to-5 but still awake
7pm10amOne side outside 9-to-5 but still awake
8pm11amOne side outside 9-to-5 but still awake
9pm12pmOne side outside 9-to-5 but still awake
10pm1pmHouston late evening, Sydney working hours

Green = standard working hours (9 AM – 5 PM). Amber = early (6–9 AM). Orange = evening (5–10 PM). Grey = asleep or late.

Daylight saving time between Houston and Sydney

Both cities observe daylight saving time, but on different schedules. This creates short windows each year where the usual difference of 15 hours behind temporarily shifts.

  • Dec 31 → Mar 8Difference temporarily 17 hours behind.
  • Mar 8 → Apr 4Difference temporarily 16 hours behind.
  • Oct 3 → Nov 1Difference temporarily 16 hours behind.
  • Nov 1 → Dec 31Difference temporarily 17 hours behind.

Houston transitions on March 8, 2026 and November 1, 2026. Sydney transitions on April 5, 2026 and October 4, 2026.

Distance between Houston and Sydney

Great-circle distance
13,818 km
Direct flight time
~17h 15m

Houston and Sydney are 13,818 km apart along the great-circle route. A direct flight takes roughly ~17h 15m, depending on aircraft type, winds, and routing.

More comparisons

Houston to New YorkHouston to LondonHouston to TokyoSydney to New YorkSydney to LondonSydney to TokyoSydney to Dubai

Frequently asked questions

What is the time difference between Houston and Sydney?
The current time difference is 15 hours. Houston is currently 15 hours behind Sydney.
Is Houston ahead of Sydney?
No. Houston is currently 15 hours behind Sydney.
What time is it in Sydney when it's 9 AM in Houston?
When it's 9 AM in Houston, it's 12am in Sydney.
When is the best time to schedule a meeting between Houston and Sydney?
Standard 9-to-5 working hours in Houston and Sydney do not overlap. To meet synchronously, one side will need to start before 9 AM or work past 5 PM — see the planner above for the least disruptive options.
Do Houston and Sydney observe daylight saving time?
Houston and Sydney both observe daylight saving time, but on different schedules. Short windows each year (a week or two around each set of transitions) produce a temporarily different offset.
How far apart are Houston and Sydney?
Houston and Sydney are 13,818 km apart along the great-circle route. A direct flight takes roughly 17 hours 15 minutes.