Which airlines fly to St. Louis?

When flying to St. Louis from Australia, momondo travellers will most often fly with one of these popular airlines: United Airlines, Qantas Airways, Air Canada or Air New Zealand. Depending on what airport in Australia you fly from, you may be able to find flights with any of these popular airlines.

Qantas Airways Flights to St. Louis

10 Qantas Airways flights head to St. Louis on average each week. Most will be flying from Dallas/Fort Worth to St. Louis, the most popular route that Qantas Airways operates to St. Louis. Prices vary based on when and where you fly from - the cheapest Qantas Airways flight to St. Louis found in the past 3 days on momondo was $1,484, departing from Adelaide. Qantas Airways is the most popular choice on momondo for this route and has been scored 7.5/10 by 907 of our users.

How long does it take to fly to St. Louis?

The flight from Australia to St. Louis depends on which airports you’re departing from and arriving to, and whether or not you have a layover. If you fly from Sydney Kingsford Smith (a popular airport in Australia) to Lambert-St Louis (the most popular airport in St. Louis), then the flight time is 22h 57m on average. If you fly from Melbourne (another popular airport in Australia) to Lambert-St Louis, then the average flight time is 20h 27m.

$697 Cheap Flights to St. Louis in 2025/26

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Find the cheapest flights from Australia to St. Louis

Round-trip

One-way

Cheap return flights

10:20 - 15:29SYD-STL

45h 09m2 stops

16:05 - 08:35STL-SYD

48h 30m2 stops

$1,214Air Canada

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Thu, 12 Mar - Mon, 16 Mar

10:20 - 15:29SYD-STL

45h 09m2 stops

13:30 - 08:35STL-SYD

27h 05m2 stops

$1,225Air Canada

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Thu, 12 Mar - Mon, 16 Mar

11:20 - 00:42SYD-STL

29h 22m1 stop

07:00 - 09:00STL-SYD

33h 00m1 stop

$1,267American Airlines

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Sun, 2 Nov - Sun, 9 Nov

12:00 - 16:27MEL-STL

20h 27m1 stop

09:00 - 10:00STL-MEL

32h 00m2 stops

$1,268United Airlines

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Sat, 1 Nov - Sat, 8 Nov

11:20 - 00:42SYD-STL

29h 22m1 stop

14:29 - 09:00STL-SYD

25h 31m2 stops

$1,273American Airlines

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Sun, 2 Nov - Sun, 9 Nov

11:05 - 16:28SYD-STL

21h 23m2 stops

16:43 - 07:00STL-SYD

45h 17m2 stops

$1,277United Airlines

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Fri, 31 Oct - Fri, 7 Nov

19:00 - 16:29MEL-STL

61h 29m3 stops

16:05 - 18:35STL-MEL

57h 30m3 stops

$1,460Multiple Airlines

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Sat, 1 Nov - Sat, 8 Nov

11:45 - 18:47SYD-STL

23h 02m2 stops

09:00 - 08:45STL-SYD

30h 45m3 stops

$1,938Multiple Airlines

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Fri, 31 Oct - Fri, 7 Nov

12:00 - 23:05MEL-STL

27h 05m1 stop

18:03 - 05:00STL-MEL

41h 57m1 stop

$2,650Qantas Airways

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Sat, 1 Nov - Sat, 8 Nov

11:00 - 23:42LST-STL

29h 42m2 stops

07:00 - 19:50STL-LST

43h 50m2 stops

$3,362Qantas Airways

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Thu, 20 Nov - Mon, 24 Nov

Fly from

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

10:20-15:29

2 stops45h 09m

Lambert-St Louis

Mon 16/3

16:05-08:35

2 stops48h 30m

$1,214

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

10:20-15:29

2 stops45h 09m

Lambert-St Louis

Mon 16/3

13:30-08:35

2 stops27h 05m

$1,225

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 2/11

11:20-00:42

1 stop29h 22m

Lambert-St Louis

Sun 9/11

07:00-09:00

1 stop33h 00m

$1,267

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 1/11

12:00-16:27

1 stop20h 27m

Lambert-St Louis

Sat 8/11

09:00-10:00

2 stops32h 00m

$1,268

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 2/11

11:20-00:42

1 stop29h 22m

Lambert-St Louis

Sun 9/11

14:29-09:00

2 stops25h 31m

$1,273

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 31/10

11:05-16:28

2 stops21h 23m

Lambert-St Louis

Fri 7/11

16:43-07:00

2 stops45h 17m

$1,277

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 1/11

19:00-16:29

3 stops61h 29m

Lambert-St Louis

Sat 8/11

16:05-18:35

3 stops57h 30m

$1,460

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 31/10

11:45-18:47

2 stops23h 02m

Lambert-St Louis

Fri 7/11

09:00-08:45

3 stops30h 45m

$1,938

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 1/11

12:00-23:05

1 stop27h 05m

Lambert-St Louis

Sat 8/11

18:03-05:00

1 stop41h 57m

$2,650

LauncestonSt. Louis

LST - STL

LSTSTL

Launceston

Thu 20/11

11:00-23:42

2 stops29h 42m

Lambert-St Louis

Mon 24/11

07:00-19:50

2 stops43h 50m

$3,362

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

St. Louis flights insights and trends

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Prices

Other information

What is the cheapest month to fly to St. Louis?

The month of November is, on average, the cheapest month to fly to St. Louis from Australia, with most prices found around $1,545. If you aren’t able to travel to St. Louis during the month of November, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $1,691.

What is the cheapest day to depart on your flight to St. Louis?

According to our data, Saturday is the cheapest day to fly to St. Louis from Australia. The lowest ticket price found for a Saturday departure recently was $2,094. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Australia to St. Louis on a Thursday will generally be more expensive and average around $2,682. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Australia in the morning is the least expensive time of day to depart. momondo users have found prices as low as $2,144 when looking at flights departing in the morning. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $3,113 per ticket.

Cheapest flights to Lambert-St Louis

Find the cheapest flights to Lambert-St Louis from your nearest city or airport

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Cheap St. Louis flight deals and tips

Summary info about St. Louis flight prices, duration and airlines

Best One-Way Price	$697
Best Round-Trip Price	$1,214
Fastest flight time	19h 18m
Popular in	July

The best one-way flight price to St. Louis from Australia in the last 72 hours is $697 (Sydney Kingsford Smith to Lambert-St Louis).

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The best round-trip flight price to St. Louis from Australia in the last 72 hours is $1,214 (Sydney Kingsford Smith to Lambert-St Louis).

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The fastest flight to St. Louis from Australia takes 19h 18m (Melbourne to Lambert-St Louis).

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July has the highest demand for flights to St. Louis, with a 4% price increase on average.

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Frequently asked questions about flying to St. Louis

Is there an alternative airport near St. Louis?

Those flying to St. Louis could potentially find better pricing at Belleville Airport (35 km from St. Louis city centre), Marion Williamson County Airport (142 km from St. Louis city centre) or Springfield Capital Airport (142 km from St. Louis city centre) depending on the month and departure airport.

When did momondo last update prices for flights to Lambert-St Louis Airport?

Prices for flights to Lambert-St Louis Airport were last updated today.

How many operators does momondo search for flights to Lambert-St Louis Airport?

As of September 2025, there are 5 operators available to choose from for flights to Lambert-St Louis Airport.

How old do you have to be to fly to Lambert-St Louis 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 to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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Why use momondo?

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

Finding the right flight to St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

Flights to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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 to St. Louis.

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

Price alerts on flights to St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.