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

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The best prices from St Louis to Sydney 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
32 - 75.2 °F
SYD
Rainfall
3.3 - 6.3 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

$1,189

Average for round-trip flights in June 2021

Round-trip from

$1,126

From St Louis to Sydney

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

Sunday is generally a great day to depart. Flying on this day could help you save up to 25%.

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

To save on the cost of your flight from St Louis to Sydney, book at least 61 days before your planned departure. Booking around this time can save you about 14% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $1,179 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,248.

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 July, with the cheapest ticket starting at $635.

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

When flying from St Louis to Sydney, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 15% versus a flight in the evening.

Cheap flights from St Louis to Sydney in June, July 2021

The best prices found for STL to SYD flights for June, July
20 Jun - 23 Jun
$3,171pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
20 Jun - 23 Jun
$3,219pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
20 Jul - 27 Jul
$3,677pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Delta
   
2 STOPS
STL
Lambert-St Louis

St Louis to Sydney 2021 flight deals

Cheap flights to Sydney from St Louis found for this year
20 Sep - 28 Sep
$1,642pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis
20 Sep - 28 Sep
$1,663pp
STL
Lambert-St Louis
Fiji Airways
   
2 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Fiji Airways
   
2 STOPS
STL
Lambert-St Louis
12 Oct - 18 Oct
$1,671pp
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

Last minute flights from St Louis to Sydney

Late deals on round-trip flights to Sydney from St Louis, departing today and this week
25 Jun - 27 Jun
$4,302pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
American Airlines
 
1 STOP
STL
Lambert-St Louis
25 Jun - 27 Jun
$4,305pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
American Airlines
   
2 STOPS
STL
Lambert-St Louis
25 Jun - 27 Jun
$7,085pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SYD
Sydney Kingsford Smith
SYD
Sydney Kingsford Smith
Multiple Airlines
     
3 STOPS
STL
Lambert-St Louis

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

Are flight prices decreasing from St Louis to Sydney due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and Sydney for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

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 $1,700 on Cheapflights?

Yes, there are multiple flights from St Louis to Sydney for under $1,700. The cheapest flight booked recently is on Multiple Airlines for just $1,642, but on average you can expect to pay $2,164.

Are there nonstop flights from St Louis to Sydney for under $1,600 on Cheapflights?

There are no nonstop flights from St Louis to Sydney, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from St Louis to Sydney for under $4,400?

There are currently 3+ open flights from St Louis to Sydney within the next 7 days for less than $4,400.

Does it rain more in St Louis or Sydney?

The rainfall in St Louis is generally more than the rainfall in Sydney. This will continue over the next 14 days.

Is St Louis weather warmer or cooler than Sydney?

Expect the weather to be around 90 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Sydney is generally colder than in St Louis.

How long is the flight from St Louis to Sydney?

Departing from St Louis to Sydney will take you 20h 48m. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from St Louis to Sydney round-trip?

Flying on Fiji Airways is currently your cheapest option to Sydney, with prices starting at $1,663. Additional round-trip tickets that might be worth considering are offered by British Airways and United Airlines, with the lowest prices starting at $3,091 and $4,982, respectively.

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 = $1.34
Average temperature for June in Sydney
68.0 °F
Avg rainfall for June in Sydney
3.3 ″

Airports servicing St. Louis

Airports servicing Sydney

Top 6 airlines flying from St Louis to Sydney

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
Qantas Airways
$713 $1,178 No cancel fee 74%
Air New Zealand
$966 $1,220 No cancel fee 78%
Delta
$738 $1,380 No cancel fee N/A
United Airlines
$686 $1,431 No cancel fee 69%
American Airlines
$801 $1,506 No cancel fee 71%
Air Canada
$1,138 $1,554 No cancel fee 67%
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