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1.098 € Cheap Flights from St Louis to Sydney

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      Travellers and cabin class, 1 Adult, Economy

      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 Airport to Sydney Airport? If you want to travel next month, return fares start from 1.177 €. Find the lowest prices on one-way and return tickets right here.
      Sydney.1.098 € per passenger.Departing Sun, 25 Oct, returning Mon, 9 Nov.Return flight with United.Outbound indirect flight with United, departs from St Louis on Sun, 25 Oct, arriving in Sydney.Inbound indirect flight with United, departs from Sydney on Mon, 9 Nov, arriving in St Louis.Price includes taxes and charges.From 1.098 €, select.
      Sydney.1.177 € per passenger.Departing Thu, 12 Nov, returning Thu, 19 Nov.Return flight with United.Outbound indirect flight with United, departs from St Louis on Thu, 12 Nov, arriving in Sydney.Inbound indirect flight with United, departs from Sydney on Thu, 19 Nov, arriving in St Louis.Price includes taxes and charges.From 1.177 €, select.
      Sydney.1.188 € per passenger.Departing Fri, 5 Feb, returning Mon, 8 Feb.Return flight with Qantas.Outbound indirect flight with Qantas, departs from St Louis on Fri, 5 Feb, arriving in Sydney.Inbound indirect flight with Qantas, departs from Sydney on Mon, 8 Feb, arriving in St Louis.Price includes taxes and charges.From 1.188 €, select.
      Sydney.1.236 € per passenger.Departing Fri, 15 Jan, returning Mon, 1 Feb.Return flight with Qantas.Outbound indirect flight with Qantas, departs from St Louis on Fri, 15 Jan, arriving in Sydney.Inbound indirect flight with Qantas, departs from Sydney on Mon, 1 Feb, arriving in St Louis.Price includes taxes and charges.From 1.236 €, select.
      Sydney.1.249 € per passenger.Departing Fri, 5 Mar, returning Mon, 15 Mar.Return flight with Qantas.Outbound indirect flight with Qantas, departs from St Louis on Fri, 5 Mar, arriving in Sydney.Inbound indirect flight with Qantas, departs from Sydney on Mon, 15 Mar, arriving in St Louis.Price includes taxes and charges.From 1.249 €, select.
      Sydney.1.284 € per passenger.Departing Tue, 1 Dec, returning Thu, 10 Dec.Return flight with United.Outbound indirect flight with United, departs from St Louis on Tue, 1 Dec, arriving in Sydney.Inbound indirect flight with United, departs from Sydney on Thu, 10 Dec, arriving in St Louis.Price includes taxes and charges.From 1.284 €, select.
      Sydney.1.288 € per passenger.Departing Mon, 10 May, returning Mon, 23 Aug.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Mon, 10 May, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Mon, 23 Aug, arriving in St Louis.Price includes taxes and charges.From 1.288 €, select.
      Sydney.1.313 € per passenger.Departing Thu, 20 May, returning Thu, 27 May.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Thu, 20 May, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Thu, 27 May, arriving in St Louis.Price includes taxes and charges.From 1.313 €, select.
      Sydney.1.378 € per passenger.Departing Wed, 13 Jan, returning Sun, 31 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 13 Jan, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Sun, 31 Jan, arriving in St Louis.Price includes taxes and charges.From 1.378 €, select.
      Sydney.1.494 € per passenger.Departing Tue, 29 Dec, returning Sat, 30 Jan.Return flight with Frontier Airlines and Fiji Airways.Outbound indirect flight with Frontier Airlines, departs from St Louis on Tue, 29 Dec, arriving in Sydney.Inbound indirect flight with Fiji Airways, departs from Sydney on Sat, 30 Jan, arriving in St Louis.Price includes taxes and charges.From 1.494 €, select.
      Sydney.1.504 € per passenger.Departing Thu, 4 Feb, returning Wed, 31 Mar.Return flight with Alaska Airlines and Fiji Airways.Outbound indirect flight with Alaska Airlines, departs from St Louis on Thu, 4 Feb, arriving in Sydney.Inbound indirect flight with Fiji Airways, departs from Sydney on Wed, 31 Mar, arriving in St Louis.Price includes taxes and charges.From 1.504 €, select.
      Sydney.1.519 € per passenger.Departing Wed, 14 Oct, returning Tue, 20 Oct.Return flight with Frontier Airlines and Jetstar.Outbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 14 Oct, arriving in Sydney.Inbound indirect flight with Jetstar, departs from Sydney on Tue, 20 Oct, arriving in St Louis.Price includes taxes and charges.From 1.519 €, select.
      How did we find these deals? The deals you see here are the lowest prices for flight tickets from St Louis to Sydney found in the last 4 days, and are subject to change and availability.

      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 November.
      Oct
      from 1.519 €
      Nov
      from 1.177 €
      Dec
      from 1.284 €
      Jan
      from 1.378 €
      Feb
      from 1.188 €
      Mar
      from 1.249 €
      Apr
      Find prices
      May
      from 1.313 €
      Jun
      Find prices
      Jul
      Find prices
      Aug
      Find prices
      Sep
      Find prices

      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.

      Sydney

      9km from central Sydney
      ClosestCheapest
      from 1.098 €
      Search flights

      Wollongong

      86km from central Sydney
      Search flights

      St Louis to Sydney: Flight information

      The things to know before you go.
      Cheapest flight found1.098 €
      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 1.098 €. 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 1.098 €.
      As of October 2026, there are no flights flying from St Louis to Sydney.
      The cheapest month to fly from St Louis to Sydney is usually October.
      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, 25 October 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, United offers the cheapest flight tickets to Sydney.

      Travelling from St Louis Airport (STL) to Sydney Airport (SYD): what you need to know

      • Sydney is 17 hours ahead of St Louis and observes the UTC+11 timezone.

      • Get to the airport on time so you don't miss your STL to SYD flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the stress of rushing.

      • Travelling during a peak month such as July? Public holidays and other high seasons can result in longer queues and delays at airport checkpoints. Be extra cautious and arrive up to four hours ahead of international flights and two hours before domestic departures.

      • We make it a breeze to book a flight with a stopover. To see your options for tickets from St Louis Airport to Sydney Airport, uncheck 'Direct flights only.' Then, pick a flight that has a stop long enough to tour the city of your choice. Some great stopovers between STL and SYD include:

        • Dallas Fort Worth International Airport

        • Los Angeles International Airport

        • Houston George Bush Intercntl. Airport

      How to find the cheapest flights from St Louis Airport (STL) to Sydney Airport (SYD)

      • The cheapest price we've found for a one-way St Louis Airport to Sydney Airport flight is 581 €. A return plane ticket right now is 1.098 €. Depending on the availability when you book, these fares may change.

      • Don't leave everything to the last moment. You're more likely to find cheap tickets from STL to SYD if you book early. Airlines often offer some fantastic early bird rates.

      • If you're willing to be flexible with your trip dates, use the 'Whole month' search function. It'll give you the lowest price in each month when looking for your flight from St Louis Airport to Sydney Airport.

      • Picking up cheap flights from STL to SYD is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll let you know when a new deal comes up.

      • Discover the perfect flight for you with the help of the filters. To see the 'Cheapest,' 'Best' or 'Fastest' flights from St Louis Airport to Sydney Airport, use the 'Sort by' function. You can also filter by departure and arrival times, airline, and journey duration.

      Handy information about St Louis Airport (STL)

      Arriving at Sydney Airport (SYD)

      Getting from Sydney Airport (SYD) to central Sydney

      • Sydney Airport to the centre of Sydney has a drive time of around 20 minutes. It's approximately 8 kilometres away.

      • It takes around 15 minutes if you're travelling by public transport.

      When to fly to Sydney Airport (SYD)

      • It's time to work out your travel dates for your flight from St Louis Airport to Sydney Airport. July is the busiest month to head to Sydney. If you like a quieter vibe, go in March.

      • Before locking in your flight from St Louis Airport to Sydney Airport, consider the type of weather you like. January is the warmest month in Sydney, with temperatures ranging from 17ºC (63ºF) to 32ºC (90ºF).

      • Look for cheap tickets from STL to SYD in July if you like cooler conditions. Temperatures are at their lowest around then, ranging between 5ºC (41ºF) and 19ºC (66ºF) on average.

      Explore more of Australia

      • Sydney is always a good idea, but there are so many other corners of Australia waiting to be explored. About 241 kilometres south-west of Sydney, a trip to Canberra will keep you on the move. Start with leading sights like National Gallery of Australia, National Portrait Gallery and Museum of Australian Democracy.

      • If you're looking to explore another major destination in Australia, consider Newcastle, roughly 121 kilometres north-east of Sydney. Merewether Beach, Nobbys Beach and Newcastle Beach are among its highlights.

      Plan the rest of your trip from St Louis to Sydney

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.