Cheap flights from St. Louis (STL) to Sydney (SYD)

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The best prices from Lambert-St Louis to Sydney Kingsford Smith are usually found in September or June, booked 60 days in advance, depart on a Monday or Tuesday and return on a Tuesday

How to find the cheapest flight from
St. Louis (STL) to Sydney (SYD)

All the information you need to plan the best STL to SYD flight in 2021: compare St. Louis to Sydney flight prices with the expected peak season, weather and rainfall in Sydney.
STL - SYD
Price
$1,126 - $1,810
SYD
Temperature
51.8 - 71.6 °F
SYD
Precipitation
2 - 5.1 inches

Popular in

December

High demand for flights, 23% potential price rise

Cheapest in

September

Best time to find cheap flights, 19% potential price drop

Average price

$1,346

Average for round-trip flights in October 2021

Round-trip from

$1,126

From Lambert-St Louis to Sydney Kingsford Smith

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest month to fly from St. Louis to Sydney?

Flights from St. Louis to Sydney lean towards being more expensive in December. Prices are generally better when you fly from St. Louis to Sydney in September, with the cheapest ticket starting at $713.

When is the cheapest time to fly from St. Louis to Sydney (STL - SYD)?

It’s optimal to fly from St. Louis to Sydney in the afternoon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the evening.

How far in advance should I book a flight from St. Louis to Sydney?

Find a great deal and save up to 17% by booking at least 61 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Sydney within the next two weeks, with the cheapest ticket starting at $1,446.

What is the cheapest day to fly round-trip from St. Louis to Sydney?

It’s generally more expensive to depart on a Sunday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

Lambert-St Louis to Sydney 2021 flight deals

Cheap flights to Sydney from St. Louis found for this year
1 Dec - 14 Dec
$1,429pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
1 Dec - 14 Dec
$1,463pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
22 Dec - 6 Jan
$1,475pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

One-way flights to Kingsford Smith from St. Louis

The cheapest one-way flights from St. Louis to Sydney
3:25 am - 9:00 am
Multiple Airlines
3 Stops
36h 35m
STL - SYD
Multiple Airlines
$1,894
Kiwi.com
1:43 am - 1:30 am
Japan Airlines
2 Stops
30h 47m
STL - SYD
Japan Airlines
$2,163
SmartFares
2:00 am - 3:45 am
Delta
2 Stops
33h 45m
STL - SYD
Delta
$6,686
Delta

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St. Louis</span> to <span class="emphasized">Sydney</span> flights.

Flight FAQs

From St. Louis to Sydney

Which airlines flying from Lambert-St Louis to Sydney Kingsford Smith have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Lambert-St Louis to Sydney Kingsford Smith that may be offering flexible cancellation policies are United Airlines, Qantas Airways, and American Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from St. Louis to Sydney for under $1,500 on Cheapflights?

Yes, there are multiple flights from St. Louis to Sydney for under $1,500. The cheapest flight booked recently is on Multiple Airlines for just $1,429, but on average you can expect to pay $1,598.

What is the cheapest airline to fly from St. Louis to Sydney round-trip?

According to our current data, Fiji Airways ($1,594), offers the cheapest pricing from St. Louis to Sydney.

What are the most popular airlines that fly from St. Louis to Sydney?

Consider American Airlines, Air Canada or Delta when booking your flight. These represent the most popular airlines when flying from St. Louis to Sydney.

What are the cheapest flights from St. Louis to Sydney?

On average you can expect to pay $2,893 for a flight from St. Louis to Sydney. The cheapest flight overall is $642 while the most popular route, (Lambert-St Louis - Sydney Kingsford Smith) is currently priced at $1,468.

COVID Restrictions

View COVID Travel Restrictions for Sydney, Australia

Do I need a COVID test to fly to Sydney from St. Louis?

Information is based on travel restrictions from Lambert-St Louis to Sydney Kingsford Smith

Most visitors from Lambert-St Louis will not be allowed to enter Sydney Kingsford Smith.

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) test taken 72 hours before departing to Sydney Kingsford Smith.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Sydney Kingsford Smith.

Documents
Travel Authorization Form - Travelers who are not in an exempt category may request an individual exemption to Australia's travel restrictions using this form.


Do I need a test to fly back to St. Louis from Sydney?

Returning to Lambert-St Louis from Sydney Kingsford Smith

COVID-19 testing requirements
Visitors from Sydney Kingsford Smith must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Lambert-St Louis.

Quarantine requirements
Visitors from Sydney Kingsford Smith are not required to quarantine after entering Lambert-St Louis.

Hide COVID Travel Restrictions for Sydney, Australia

Destination information for Sydney

Things to know before you go - useful duration and weather info for your trip from St. Louis to Sydney.
Today's exchange rate
$1 = $1.35
Average temperature for October in Sydney
57.2 °F
Avg rainfall for October in Sydney
5.8 ″

Airports servicing St. Louis

Airports servicing Sydney

Top 6 airlines flying from Lambert-St Louis to Sydney Kingsford Smith

The chart below displays the airlines Cheapflights users traveling from St. Louis to Sydney choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
United Airlines
$686 $1,431 No cancel fee 69%
Qantas Airways
$713 $1,178 No cancel fee 74%
Delta
$738 $1,380 No cancel fee N/A
American Airlines
$801 $1,506 No cancel fee 71%
Air New Zealand
$966 $1,220 No cancel fee 78%
Air Canada
$1,138 $1,554 No cancel fee 67%