August is the cheapest month to fly this route, with average fares around $1019 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $1085 | $1006 | ||
| June 2026 | $1045 | $1006 | ||
| July 2026 | $1389 | $1006 | Peak | |
| August 2026 | $1019 | $1006 | Best |
Departing on Saturday offers the lowest average fares at $1122. Thursday departures are the most expensive at $1300, a difference of $178.
The best time to fly is August. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Houston to Sydney is August, with average round-trip fares around $1019. The lowest fare found in August is $1006.
Saturday departures are the cheapest, averaging $1122 round trip. The most expensive day is Thursday at $1300.
Based on current pricing trends, booking for August travel offers the best value. Avoid July if possible, as fares average $1389 compared to $1019 in the cheapest month. May is a solid middle-ground option at $1085.
Flying in August instead of July can save you approximately $370 per round trip. The cheapest month averages $1019 while the most expensive averages $1389.
Airlines, flight times, price calendar, and more for Houston to Sydney
View IAH → SYD Details