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 orAir Canada. 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

7 Qantas Airways flights head to St. Louis on average each week. Most will be flying from Los Angeles 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 $1,514, departing from Adelaide. Qantas Airways is the most popular choice on momondo for this route and has been scored 7.5/10 by 933 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 23h 24m on average. If you fly from Melbourne (another popular airport in Australia) to Lambert-St Louis, then the average flight time is 24h 38m.

$901 Cheap Flights to St. Louis in 2025/26

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10:45 - 14:29BNE-STL

43h 44m2 stops

17:54 - 07:45STL-BNE

46h 51m2 stops

$1,232Air Canada

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Sun, 8 Mar - Tue, 10 Mar

10:45 - 14:29BNE-STL

43h 44m2 stops

17:54 - 07:45STL-BNE

46h 51m2 stops

$1,233Air Canada

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Sun, 8 Mar - Tue, 10 Mar

19:40 - 23:09BNE-STL

18h 29m1 stop

07:17 - 05:00STL-BNE

30h 43m2 stops

$1,258American Airlines

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Sun, 8 Mar - Tue, 10 Mar

09:40 - 13:02BNE-STL

19h 22m1 stop

12:01 - 05:30STL-BNE

26h 29m1 stop

$1,261American Airlines

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Sun, 8 Mar - Tue, 10 Mar

09:40 - 15:09BNE-STL

21h 29m1 stop

17:59 - 05:30STL-BNE

20h 31m1 stop

$1,327Qantas Airways

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Sun, 8 Mar - Tue, 10 Mar

10:10 - 17:43MEL-STL

24h 33m2 stops

18:59 - 07:00STL-MEL

44h 01m2 stops

$1,709Delta

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Fri, 6 Mar - Tue, 10 Mar

10:10 - 17:43MEL-STL

24h 33m2 stops

18:59 - 07:00STL-MEL

44h 01m2 stops

$1,711Delta

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Fri, 6 Mar - Tue, 10 Mar

10:20 - 18:22SYD-STL

23h 02m1 stop

05:20 - 06:55STL-SYD

34h 35m2 stops

$1,856United Airlines

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Sun, 3 May - Sun, 17 May

06:30 - 16:09SYD-STL

25h 39m2 stops

06:30 - 09:00STL-SYD

34h 30m1 stop

$2,183Qantas Airways

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Thu, 12 Mar - Mon, 16 Mar

11:40 - 19:18BNE-STL

23h 38m2 stops

18:35 - 07:30STL-BNE

44h 55m2 stops

$2,664United Airlines

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Sat, 27 Dec - Sat, 3 Jan

Fly from

Route

Depart

Return

Price

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

10:45-14:29

2 stops43h 44m

Lambert-St Louis

Tue 10/3

17:54-07:45

2 stops46h 51m

$1,232

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

10:45-14:29

2 stops43h 44m

Lambert-St Louis

Tue 10/3

17:54-07:45

2 stops46h 51m

$1,233

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

19:40-23:09

1 stop18h 29m

Lambert-St Louis

Tue 10/3

07:17-05:00

2 stops30h 43m

$1,258

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

09:40-13:02

1 stop19h 22m

Lambert-St Louis

Tue 10/3

12:01-05:30

1 stop26h 29m

$1,261

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

09:40-15:09

1 stop21h 29m

Lambert-St Louis

Tue 10/3

17:59-05:30

1 stop20h 31m

$1,327

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 6/3

10:10-17:43

2 stops24h 33m

Lambert-St Louis

Tue 10/3

18:59-07:00

2 stops44h 01m

$1,709

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 6/3

10:10-17:43

2 stops24h 33m

Lambert-St Louis

Tue 10/3

18:59-07:00

2 stops44h 01m

$1,711

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 3/5

10:20-18:22

1 stop23h 02m

Lambert-St Louis

Sun 17/5

05:20-06:55

2 stops34h 35m

$1,856

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

06:30-16:09

2 stops25h 39m

Lambert-St Louis

Mon 16/3

06:30-09:00

1 stop34h 30m

$2,183

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sat 27/12

11:40-19:18

2 stops23h 38m

Lambert-St Louis

Sat 3/1

18:35-07:30

2 stops44h 55m

$2,664

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 $1,578. 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 $1,726.

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 $2,137. 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 $2,738. 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 $2,189 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 $3,178 per ticket.

Cheapest flights to Lambert-St Louis

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

Find flights from Sydney to St. Louis

CHEAPEST MONTH TO FLY TO ST. LOUIS FROM SYDNEY	November	24% cheaper	Flying from Sydney to St. Louis costs on average just $1,578 in November
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM SYDNEY	May	21% more expensive	It costs about $2,517 for flights to St. Louis from Sydney in May
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM SYDNEY	December	366% more users visited	More momondo users searched in flights to St. Louis from Sydney in December than any other month

Cheap St. Louis flight deals and tips

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

Best One-Way Price	$901
Best Round-Trip Price	$1,232
Fastest flight time	19h 27m
Popular in	July

The best one-way flight price to St. Louis from Australia in the last 72 hours is $901 (Melbourne 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 $1,232 (Brisbane to Lambert-St Louis).

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The fastest flight to St. Louis from Australia takes 19h 27m (Sydney Kingsford Smith 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 November 2025, there are 4 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 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?

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

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