Cheap flights from Montréal to Sydney (YUL to SYD) from $2,387

The cheapest month to fly is November, and departing on Tuesdays 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 Montréal to Sydney are rarely cheap, and prices spike sharply within 2 weeks of departure.

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

Weigh up connecting flights: Connecting flights on Montréal to Sydney 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. Lufthansa and Korean Air 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 Montréal to Sydney start from $2,387, with typical prices ranging from $2,387 to $2,687.

The typical flight time from Montréal to Sydney is approximately 23 hours and 22 minutes.

Airlines operating this route include Lufthansa, Korean Air, Delta Air Lines, Air Canada, Philippine Airlines, American Airlines, SWISS, Turkish Airlines, Austrian, JAL, WestJet, Cathay Pacific, British Airways, ANA, Qatar Airways, Air New Zealand, Air China.