August is the cheapest month to fly this route, with average fares around $1132 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $1187 | $1169 | ||
| June 2026 | $1288 | $1169 | Peak | |
| July 2026 | $1279 | $1142 | ||
| August 2026 | $1132 | $1081 | Best |
Departing on Sunday offers the lowest average fares at $1245. Saturday departures are the most expensive at $1273, a difference of $28.
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 San Francisco to Sydney is August, with average round-trip fares around $1132. The lowest fare found in August is $1081.
Sunday departures are the cheapest, averaging $1245 round trip. The most expensive day is Saturday at $1273.
Based on current pricing trends, booking for August travel offers the best value. Avoid June if possible, as fares average $1288 compared to $1132 in the cheapest month. July is a solid middle-ground option at $1279.
Flying in August instead of June can save you approximately $156 per round trip. The cheapest month averages $1132 while the most expensive averages $1288.
Airlines, flight times, price calendar, and more for San Francisco to Sydney
View SFO → SYD Details