$1,535 Find cheap flights from St. Louis to Sydney

In the last 3 days, the lowest price for a flight from St. Louis to Sydney was $998 for a one-way ticket and $1,325 for a return.

We unfortunately don’t have that data for this specific route.

oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between St. Louis and Sydney, with oneworld being the most commonly used for this route.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Sydney.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Sydney with an airline and back to St. Louis with another airline.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.