Flight tickets from St Louis to Sydney

Compare St Louis to Sydney flight deals

Find the cheapest month or even day of the year to fly to Sydney

Book the best Sydney fare with no extra fees

Flight deals from St Louis to Sydney

Looking for a cheap last-minute deal or the best return flight from St Louis to Sydney? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Sydney

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Sydney flights are currently cheapest in October.

St Louis to Sydney: Alternative routes

Compare routes from St Louis to Sydney below. You may find an airport to fly into that's cheaper, faster, or easier than Sydney.

St Louis to Sydney: Flight information

The things to know before you go.
Cheapest flight found₹ 64,582
Cheapest month to flyOctober

Finding cheap flights from St Louis to Sydney: Frequently asked questions

The best price we found for a return flight from St Louis to Sydney is ₹ 104,796. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Sydney. But we found flights with one or more stops from ₹ 104,818.
As of December 2025, there are no flights flying from St Louis to Sydney.
The cheapest month to fly from St Louis to Sydney is usually February.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Sydney Airport on Sunday, 8 February 2026.
No airlines currently offer direct flights between St Louis Airport and Sydney Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Sydney but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Sydney is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Qantas offers the cheapest flight tickets to Sydney.

Travelling from Lambert-St. Louis International Airport (STL) to Sydney (Kingsford Smith) Airport (SYD): what you need to know

  • The timezone in Sydney is UTC+11, which is 16 hours ahead of St Louis.

  • To ensure you catch your STL to SYD flight, leave enough time to navigate the airport and find your gate. Arriving two hours before international departures and an hour before domestic flights is the standard rule.

  • During popular months such as July, you'll want to get to the airport well in advance. Arrive two hours before domestic departures and four hours ahead for international flights whenever you're travelling during a peak period in general.

  • If you want to add a stop to your trip, simply uncheck 'Direct flights only' when searching for your ticket from Lambert-St. Louis International Airport to Sydney (Kingsford Smith) Airport. Here are the top stopovers between STL and SYD:

    • George Bush Intercontinental Airport

    • Dallas/Fort Worth International Airport

    • Los Angeles International Airport

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Sydney (Kingsford Smith) Airport (SYD)

  • The cheapest price we've seen for a one-way Lambert-St. Louis International Airport to Sydney (Kingsford Smith) Airport flight is ₹ 64,582. A round-trip fare is currently ₹ 104,796. Depending on the availability and when you book, these fares can change.

  • To pick up cheap tickets from STL to SYD, book as early as you can. Airlines generally offer lower prices when flights are first released.

  • Getting cheap flights from Lambert-St. Louis International Airport to Sydney (Kingsford Smith) Airport is more likely if you're flexible with your travel plans. Use the 'Whole month' tool to see the lowest prices across every month and score a great deal.

  • There's no need to check back in every day to find out if fares have dropped when you create a Price Alert. We'll notify you as soon as there's a new deal on cheap flights from STL to SYD.

  • Pick your ideal arrival and departure times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to find the best deals on flights from Lambert-St. Louis International Airport to Sydney (Kingsford Smith) Airport.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Sydney (Kingsford Smith) Airport (SYD)

  • If you're getting in on a late Lambert-St. Louis International Airport to Sydney (Kingsford Smith) Airport flight, few things top the convenience of being near the terminal. Pick up your bags from the carousel and then be showered and snoozing not long after at one of these accommodation options near SYD:

  • Pick up a Sydney (Kingsford Smith) Airport rental car and discover Sydney and beyond with your own wheels. Simba car hire, Bargain Car Rentals and Yes Drive are leading providers you can book with here.

  • Secure the lowest price by reserving your vehicle from Sydney (Kingsford Smith) Airport about two weeks in advance of your trip.

Getting from Sydney (Kingsford Smith) Airport (SYD) to central Sydney

  • From Sydney (Kingsford Smith) Airport, Sydney is approximately 18 kilometres away. It takes around 20 minutes to get to the centre driving.

  • When travelling on public transport, expect a journey of roughly 25 minutes.

When to fly to Sydney (Kingsford Smith) Airport (SYD)

  • April is the busiest month for flights from Lambert-St. Louis International Airport to Sydney (Kingsford Smith) Airport. To skip the crowds, visit Sydney in April.

  • When reserving your flight from Lambert-St. Louis International Airport to Sydney (Kingsford Smith) Airport, consider the type of weather you enjoy. January is the warmest month in Sydney, with temperatures ranging from 17ºC to 32ºC.

  • July has average temperatures of between 5ºC and 19ºC. Look for cheap tickets from STL to SYD sometime around then if you'd rather travel in cooler conditions.

Explore more of Australia

  • Canberra is just one of the many cities in Australia waiting to be explored after you've experienced Sydney. Around 241 kilometres away to the south-west, its best attractions include Australian War Memorial, National Gallery of Australia and Parliament House.

  • Newcastle is another well-known destination in Australia and is around 121 kilometres north-east of Sydney. No trip is complete without experiencing Newcastle Beach, Nobbys Beach and Merewether Beach.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.