The cheapest times to fly from STL to SYD are
- January 22nd to March 25th
- August 6th to December 2nd (except the week of October 8th)
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from STL to SYD is mid August. Prices can be as high as $2422 for Friday flights during mid December, or as low as $1110 for Tuesday flights around mid August.
When to Fly to Sydney
Flying from St. Louis, MO (STL) to Sydney (SYD) will usually cost between $1155 to $1892 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid August with an average ticket price of $1150. Due to high demand the most expensive time to fly is mid December, with an average price of $2161. Planning your trip to low-cost times can easily save you $1011 on economy flights and even more on first-class flights. Generally, any price below $1433 can be considered a good price for a round-trip STL to SYD flight.
See below for a graph of average weekly prices for the STL to SYD route. All prices are for round-trip tickets in USD.
Compared to other flights, the STL to SYD flight is slightly more expensive than the average and costs more than the average flight leaving from St. Louis. The average price per mile (for a direct flight) is $0.1, which is far below average.
Flight Prices by Day of the Week
Tuesday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $155 (10%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1419. Return trip prices are from the SYD to STL flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from STL to SYD can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 17 hour 17 minutes may not be realistic.
Flight Hacking STL to SYD
Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from STL to SYD — but Champion Traveler does!
- Price for both tickets: $1142
- Average savings: $291 (20.31%)
- Price for both tickets: $1158
- Average savings: $275 (19.16%)
- Price for both tickets: $1295
- Average savings: $138 (9.63%)
Flight Questions Answered
Still have questions about flying from STL to SYD? We’ve got answers.
Which airlines fly this route?
You can find 20 major airlines flying this route most often: Air Canada, Air New Zealand, Air Tahiti Nui, Alaska, American, ANA, Asiana, British Airways, Cathay Pacific, China Southern, Delta, Etihad, Fiji Airways, Hawaiian, JAL, Korean Air, Qantas, Singapore Airlines, United, Virgin Australia, and potentially more during busy seasons.
How far away is it from Sydney International Airport to St Louis Lambert International Airport?
The distance between the two airports is roughly 9058 miles or 14577 kilometers.
How long does it take to fly from STL to SYD?
The real-world flight time for a nonstop STL to SYD flight is about 17 hour 17 minutes.
How many flights go between St. Louis, MO and Sydney?
It depends on the day of the week and the date, but a typical day might have around 105 available flights from STL to SYD.
Airport Location Info
|Origination airport name||St Louis Lambert International Airport|
|City||St. Louis, MO|
|Country||the United States|
|Destination airport name||Sydney International Airport|
Flights to SYD
Flights from SYD
Flights to STL
Flights from STL
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.