Cheap flights from St. Louis to Sydney

Flights overview

Useful information for finding cheap flights from St. Louis to Sydney and booking your next trip
Cheapest round-trip flights $1,304
United 1 stop 21 hr Sun, May 3 — Sun, May 17
The cheapest round-trip flight from St. Louis to Sydney is currently $1,304
Cheapest one-way flight $755
United 2 stops 32 hr Wed, May 6
The cheapest one-way flight from St. Louis to Sydney is currently $755
Last-minute weekend getaway $1,571
United 1 stop 21 hr Thu, May 7 — Mon, May 11
The cheapest last-minute weekend getaway from St. Louis to Sydney is currently $1,571
Cheapest business class flights $7,401
Air Canada, Cathay Pacific 2 stops 33 hr Mon, Jul 13 — Mon, Jul 27
The cheapest business class round-trip flight from St. Louis to Sydney is currently $7,401
Fastest flight 20 hr 31 min The fastest flight with stops from St. Louis to Sydney takes 20 hr 31 min
Nonstop flights None There are no direct flights on this route.

When is the cheapest time to fly?

The cheapest month to fly from St. Louis to Sydney is typically August. The most expensive month to fly is typically December.
August
Cheapest
Typical prices: $1,050–1,300
December
Most expensive
Typical prices: $1,350–3,400

Popular airlines from St. Louis to Sydney

  • United
    from $1,304
    Typical price: $1,300–2,250
    73 weekly connecting flights
    STL - SYD Every day
  • Delta
    from $1,309
    Typical price: $1,350–2,700
    66 weekly connecting flights
    STL - SYD Every day
  • American
    from $1,510
    Typical price: $1,300–2,450
    56 weekly connecting flights
    STL - SYD Every day
  • Air Canada
    from $1,925
    Typical price: $1,300–3,100
    14 weekly connecting flights
    STL - SYD Every day
  • Alaska
    from $1,801
    Typical price: $1,550–3,250
    7 weekly connecting flights
    STL - SYD Every day
  • British Airways
    from $3,805
    Typical price: $3,900–17,500
    4 weekly connecting flights
    STL - SYD Every Tue, Wed, Fri, Sun

Popular airports near St. Louis

  • St. Louis Lambert International Airport (STL)
    St. Louis United States 21 min 12 mi
  • General Wayne A. Downing Peoria International Airport (PIA)
    Peoria United States 2 hr 36 min 143 mi
  • Columbia Regional Airport (COU)
    Columbia United States 2 hr 8 min 109 mi
  • Indianapolis International Airport (IND)
    Indianapolis United States 3 hr 30 min 222 mi

Popular airports near Sydney

  • Sydney Airport (SYD)
    Sydney Australia 17 min 6 mi
  • Canberra Airport (CBR)
    Canberra Australia 3 hr 152 mi
  • Newcastle Airport (NTL)
    Newcastle Australia 2 hr 5 min 82 mi
  • Shellharbour Airport (WOL)
    Wollongong Australia 1 hr 31 min 53 mi

Frequently asked questions about flying from St. Louis to Sydney

The cheapest flights from St. Louis to Sydney are usually in August. Typical ticket prices in August range from $1,050 to $1,300.
The cheapest round-trip flight from St. Louis to Sydney recently found on Google Flights was with United from $1,304. The cheapest one-way flight was with United from $755.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest United flight from St. Louis to Sydney is $1,304, flying from May 3 to May 17.
  • The cheapest Delta flight from St. Louis to Sydney is $1,309, flying from May 3 to May 17.
  • The cheapest American flight from St. Louis to Sydney is $1,510, flying from May 3 to May 17.
  • The cheapest Air Canada flight from St. Louis to Sydney is $1,925, flying from Jul 31 to Aug 13.
  • The cheapest Alaska flight from St. Louis to Sydney is $1,801, flying from Jul 30 to Aug 13.
  • The cheapest British Airways flight from St. Louis to Sydney is $3,805, flying from Jul 26 to Aug 8.
The cheapest round-trip flight from St. Louis to Sydney starts at $1,304 from Sun, May 3 to Sun, May 17. The cheapest one-way flight starts at $755 and departs on Wed, May 6.
20 hr 31 min is the shortest flight time from St. Louis to Sydney.
Sydney is temperate and sunny all year, and crowds are highest during summer (Dec–Feb) and during school holidays. Major events that increase hotel demand are the performing-arts–focused Sydney Festival (Jan), the Sydney Gay & Lesbian Mardi Gras (Feb–Mar), the Sydney Royal Easter Show (dates vary) and the Sydney Film Festival (Jun). Severe thunderstorms are most likely Oct–Mar.
It's easy to use Google Flights to find the cheapest days to fly from St. Louis to Sydney.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.
What counts as the best airline for your flights from St. Louis to Sydney really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from St. Louis to Sydney.

In terms of flights, United is the most popular. United offers 73 connecting flights per week. United flies from St. Louis Lambert International Airport (STL) to Sydney Airport (SYD) .

Other popular airlines flying from St. Louis to Sydney are:
  • Delta offers 66 connecting flights per week. Delta flies from St. Louis Lambert International Airport (STL) to Sydney Airport (SYD) .
  • American offers 56 connecting flights per week. American flies from St. Louis Lambert International Airport (STL) to Sydney Airport (SYD) .
  • Air Canada offers 14 connecting flights per week. Air Canada flies from St. Louis Lambert International Airport (STL) to Sydney Airport (SYD) .
  • Alaska offers 7 connecting flights per week. Alaska flies from St. Louis Lambert International Airport (STL) to Sydney Airport (SYD) .
  • British Airways offers 4 connecting flights per week. British Airways flies from St. Louis Lambert International Airport (STL) to Sydney Airport (SYD) .
The number of connecting flights refers to distinct flights with at least one stop between St. Louis and Sydney.
The cheapest round-trip flight from St. Louis to Sydney recently found on Google Flights was with United from $1,304. The cheapest one-way flight was with United from $755.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest United flight from St. Louis to Sydney is $1,304, flying from May 3 to May 17.
  • The cheapest Delta flight from St. Louis to Sydney is $1,309, flying from May 3 to May 17.
  • The cheapest American flight from St. Louis to Sydney is $1,510, flying from May 3 to May 17.
  • The cheapest Air Canada flight from St. Louis to Sydney is $1,925, flying from Jul 31 to Aug 13.
  • The cheapest Alaska flight from St. Louis to Sydney is $1,801, flying from Jul 30 to Aug 13.
  • The cheapest British Airways flight from St. Louis to Sydney is $3,805, flying from Jul 26 to Aug 8.
No airline flies direct from St. Louis to Sydney.
  • There are 73 United connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 66 Delta connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 56 American connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 14 Air Canada connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 7 Alaska connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 4 British Airways connecting flights from St. Louis to Sydney per week. Flights are available on Tuesday, Wednesday, Friday and Sunday.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
The cheapest last-minute deal between St. Louis and Sydney at price $1,571 is offered by United from Thu, May 7 to Mon, May 11.
No airline flies direct from St. Louis to Sydney.
  • There are 73 United connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 66 Delta connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 56 American connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 14 Air Canada connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 7 Alaska connecting flights from St. Louis to Sydney per week. Flights are available every day.
  • There are 4 British Airways connecting flights from St. Louis to Sydney per week. Flights are available on Tuesday, Wednesday, Friday and Sunday.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
There are no direct flights from St. Louis to Sydney.
It's easy to find nonstop flights with Google Flights! Once you've searched for flights from St. Louis to Sydney, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.
The cheapest business class round-trip flights between St. Louis and Sydney start at $7,401 from Mon, Jul 13 to Mon, Jul 27 with Air Canada, Cathay Pacific.
The cheapest economy class round-trip flights between St. Louis and Sydney start at $1,304 from Sun, May 3 to Sun, May 17.
To book business class trips from St. Louis to Sydney, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.
The best last-minute getaway deal for the next weekend between St. Louis and Sydney starts at $1,571 from Thu, May 7 to Mon, May 11 with United.
The cheapest last-minute deal between St. Louis and Sydney at price $1,571 is offered by United from Thu, May 7 to Mon, May 11.
To find last-minute flight deals from St. Louis to Sydney, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.

Search more flights

Popular trips from St. Louis

  1. London
    $918
    Oct 19 — Nov 2
    2 stops 13 hr 48 min American, British Airways
  2. Las Vegas
    $158
    Aug 16 — Sep 1
    Nonstop 3 hr 36 min Frontier
  3. Seattle
    $250
    Jun 7 — Jun 23
    1 stop 15 hr 30 min Frontier
  4. Boston
    $394
    Aug 1 — Aug 16
    1 stop 7 hr 31 min Frontier

Find cheap flights from St. Louis to anywhere

Find cheap flights on popular routes