Cheap flights from Sydney to San Francisco (SYD to SFO) from $1,680

The cheapest month to fly is October, and departing on Thursdays typically offers the best fares. Book 6–8 weeks ahead for the best prices.

Book at the right time: For international flights, aim to book 6–10 weeks ahead. Last-minute fares on Sydney to San Francisco are rarely cheap, and prices spike sharply within 2 weeks of departure.

Shift your dates by a day or two: Thursdays are typically the cheapest day to fly this route. Avoiding Friday and Sunday departures can save significantly. October is historically the cheapest month on this route.

Weigh up connecting flights: Connecting flights on Sydney to San Francisco can be 20–40% cheaper than direct options. If you have time to spare, it's worth comparing.

Factor in baggage fees: Low-cost carriers on this route often advertise attractive base fares but charge separately for checked luggage. Always compare the all-in price — a $20 cheaper fare plus $50 baggage fee is no saving. Singapore Airlines and China Southern Airlines may have different inclusions, so check each airline's fare conditions.

Search in private browsing: Some booking sites use cookies to track repeat searches and may show higher prices after multiple lookups. Use an incognito or private window — or just use Booked AI, which pulls live prices without any tracking markup.

Compare two one-ways against a return: On some international routes, booking a one-way with one airline and the return with another can undercut a standard return ticket — especially if a budget carrier covers one direction. Check both options with the flexible dates calendar above.

The cheapest flights from Sydney to San Francisco start from $1,680, with typical prices ranging from $1,680 to $1,980.

The typical flight time from Sydney to San Francisco is approximately 20 hours and 49 minutes.

Airlines operating this route include Singapore Airlines, China Southern Airlines, JAL, Air New Zealand, Alaska Airlines, Vietnam Airlines, Qatar Airways, Air Tahiti Nui, Philippine Airlines, British Airways, Air India, American Airlines, Qantas, Air Canada, Air China, Cathay Pacific, ANA, Asiana Airlines, Fiji Airways .