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Cheap flights from St. Louis to Sydney from $1,449

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sydney departing on 14/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

Qantas Airways Logo
06:15 - 10:20STL-SYD
35h 05m2 stops
Qantas Airways Logo
14:20 - 16:07SYD-STL
18h 47m1 stop
$1,659Qantas Airways
Find Deal
Fri, 28 Nov - Sun, 14 Dec
Air Canada Logo
13:30 - 07:20STL-SYD
26h 50m2 stops
Air Canada Logo
09:20 - 23:58SYD-STL
29h 38m2 stops
$1,762Air Canada
Find Deal
Sun, 14 Sep - Sat, 27 Sep
 Logo
13:30 - 07:20STL-SYD
50h 50m3 stops
 Logo
09:20 - 16:32SYD-STL
22h 12m2 stops
$1,773
Find Deal
Sun, 14 Sep - Sat, 27 Sep
 Logo
16:43 - 08:35STL-SYD
23h 52m2 stops
 Logo
11:20 - 15:26SYD-STL
45h 06m2 stops
$1,802
Find Deal
Wed, 29 Oct - Sat, 15 Nov
American Airlines Logo
13:53 - 07:05STL-SYD
26h 12m2 stops
American Airlines Logo
09:10 - 20:15SYD-STL
26h 05m2 stops
$1,938American Airlines
Find Deal
Sun, 14 Sep - Sat, 27 Sep
American Airlines Logo
16:02 - 06:55STL-SYD
23h 53m1 stop
American Airlines Logo
09:10 - 18:27SYD-STL
24h 17m2 stops
$1,939American Airlines
Find Deal
Sun, 14 Sep - Sat, 27 Sep
Air New Zealand Logo
08:20 - 08:45STL-SYD
32h 25m2 stops
Air New Zealand Logo
11:45 - 21:59SYD-STL
27h 14m2 stops
$2,007Air New Zealand
Find Deal
Sun, 26 Oct - Mon, 3 Nov
Air New Zealand Logo
17:51 - 08:45STL-SYD
23h 54m2 stops
Air New Zealand Logo
18:20 - 22:15SYD-STL
42h 55m2 stops
$2,044Air New Zealand
Find Deal
Sun, 10 Aug - Sat, 16 Aug
United Airlines Logo
17:49 - 06:55STL-SYD
22h 06m1 stop
United Airlines Logo
10:20 - 16:53SYD-STL
21h 33m1 stop
$2,207United Airlines
Find Deal
Sat, 23 Aug - Mon, 1 Sep
United Airlines Logo
17:51 - 06:55STL-SYD
22h 04m1 stop
United Airlines Logo
10:20 - 16:45SYD-STL
21h 25m1 stop
$2,374United Airlines
Find Deal
Sun, 29 Jun - Wed, 2 Jul

Air New Zealand flights from St. Louis to Sydney

Our best Air New Zealand deals on St. Louis to Sydney flight tickets
Air New Zealand
26 Oct
STL08:20Lambert-St Louis
32h 25m
2 stops
SYD08:45Sydney Kingsford Smith
3 Nov
SYD11:45Sydney Kingsford Smith
27h 14m
2 stops
STL21:59Lambert-St Louis
Air New Zealand
10 Aug
STL17:51Lambert-St Louis
23h 54m
2 stops
SYD08:45Sydney Kingsford Smith
16 Aug
SYD18:20Sydney Kingsford Smith
42h 55m
2 stops
STL22:15Lambert-St Louis
Air New Zealand
27 July
STL06:15Lambert-St Louis
35h 30m
2 stops
SYD08:45Sydney Kingsford Smith
2 Aug
SYD18:20Sydney Kingsford Smith
42h 55m
2 stops
STL22:15Lambert-St Louis

United Airlines flights from St. Louis to Sydney

Our best United Airlines deals on St. Louis to Sydney flight tickets
United Airlines
23 Aug
STL17:49Lambert-St Louis
22h 06m
1 stop
SYD06:55Sydney Kingsford Smith
1 Sept
SYD10:20Sydney Kingsford Smith
21h 33m
1 stop
STL16:53Lambert-St Louis
United Airlines
20 June
STL16:32Lambert-St Louis
23h 28m
2 stops
SYD07:00Sydney Kingsford Smith
26 June
SYD10:20Sydney Kingsford Smith
21h 25m
1 stop
STL16:45Lambert-St Louis
United Airlines
29 June
STL17:51Lambert-St Louis
22h 04m
1 stop
SYD06:55Sydney Kingsford Smith
2 July
SYD10:20Sydney Kingsford Smith
21h 25m
1 stop
STL16:45Lambert-St Louis

See travel insights to Sydney from

How to get the cheapest flight ticket from St. Louis to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sydney?

The month of August is, on average, the cheapest month to fly to Sydney from St. Louis, with most prices found around $1,964. If you aren’t able to travel to Sydney during the month of August, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $2,130.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the afternoon. momondo users have found flights departing from St. Louis to Sydney in the afternoon for as low as $1,930. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $2,717 on average. Flights to Sydney from St. Louis in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to Sydney from St. Louis when booking 19 weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,270 when searching 19 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from St. Louis for as low as $1,959 on momondo.

When to book flights from St. Louis to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sydney according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap St. Louis to Sydney (STL to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sydney

Best price found

$1,449

Fastest flight time

20h 08m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from St. Louis in the past 72 hours is $1,449. The best return flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,659.
The fastest flight from St. Louis to Sydney takes 20h 08m
There are no direct flights from St. Louis to Sydney. Popular non-direct route for this connection is Lambert-St Louis Airport - Sydney Kingsford Smith Airport.
There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)

  • How far is Lambert-St Louis to Sydney Kingsford Smith by plane?

    A flight from Lambert-St Louis to Sydney Kingsford Smith will travel around 14576.1 km. In terms of flight time, this usually takes a little over 20h 08m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?

    Prices for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport refresh daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.


Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Terrigal
Katoomba
Lithgow
Penrith
Leura
Manly
Coogee
Bondi Beach
Cronulla
Randwick
Charlestown
Newport
Swansea

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Sydney?

It is quick and easy to find St. Louis to Sydney flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sydney that suits you.

Can I find flights from St. Louis to Sydney with flexible booking policies on momondo?

momondo does allow users to show only those flights to Sydney from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Sydney?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Sydney.

I’m not ready to book a flight from St. Louis to Sydney right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Sydney, momondo offers a useful price alert feature which will track prices for flights to Sydney from St. Louis and alert you when they change.


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Sat 21/6
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