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: Qantas Airways, United Airlines orAmerican Airlines. 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 $1,084, departing from Brisbane. Qantas Airways is the most popular choice on momondo for this route and has been scored 7.5/10 by 1,093 of our users.

American Airlines Flights to St. Louis

American Airlines flies to St. Louis 40 times per week usually, making it a popular airline to fly with, particularly when heading to St. Louis from Dallas/Fort Worth. American Airlines (rating: 7.1, 12,047 reviews) varies in price depending on when and where you want to fly to St. Louis from. The best American Airlines ticket price found on momondo to St. Louis was from Sydney Kingsford Smith ($1,448 return).

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 29h 20m on average. If you fly from Melbourne (another popular airport in Australia) to Lambert-St Louis, then the average flight time is 30h 01m.

$1,040 Cheap Flights to St. Louis in 2026

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14:35 - 18:20MEL Melbourne-STL Lambert-St Louis

19h 45m1 stop Dallas/Fort Worth

15:20 - 05:00STL Lambert-St Louis-MEL Melbourne

21h 40m1 stop Dallas/Fort Worth

$1,417Qantas Airways

Mon, 5 Oct - Mon, 12 Oct

10:20 - 15:23SYD Sydney Kingsford Smith-STL Lambert-St Louis

45h 03m2 stops Vancouver Intl Toronto Pearson Intl

16:05 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

48h 30m2 stops Toronto Pearson Intl Vancouver Intl

$1,419Air Canada

Mon, 26 Oct - Mon, 2 Nov

10:20 - 20:20SYD Sydney Kingsford Smith-STL Lambert-St Louis

26h 00m2 stops Vancouver Intl Toronto Pearson Intl

13:40 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

26h 55m2 stops Denver Intl Vancouver Intl

$1,433Air Canada

Mon, 12 Oct - Thu, 5 Nov

14:35 - 21:59MEL Melbourne-STL Lambert-St Louis

23h 24m1 stop Dallas/Fort Worth

11:31 - 05:00STL Lambert-St Louis-MEL Melbourne

25h 29m2 stops Chicago O'Hare Intl Dallas/Fort Worth

$1,440American Airlines

Mon, 5 Oct - Mon, 12 Oct

11:20 - 15:26SYD Sydney Kingsford Smith-STL Lambert-St Louis

45h 06m2 stops Vancouver Intl Toronto Pearson Intl

16:05 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

48h 30m2 stops Toronto Pearson Intl Vancouver Intl

$1,459Air Canada

Mon, 8 Feb - Mon, 22 Feb

22:45 - 16:28MEL Melbourne-STL Lambert-St Louis

34h 43m2 stops Los Angeles Los Angeles Dallas/Fort Worth

09:00 - 05:00STL Lambert-St Louis-MEL Melbourne

27h 00m1 stop Dallas/Fort Worth

$1,481American Airlines

Fri, 5 Feb - Tue, 9 Feb

09:45 - 23:46MEL Melbourne-STL Lambert-St Louis

30h 01m1 stop Los Angeles Los Angeles

15:20 - 05:00STL Lambert-St Louis-MEL Melbourne

21h 40m1 stop Dallas/Fort Worth

$1,551Qantas Airways

Sat, 10 Oct - Mon, 12 Oct

11:10 - 23:46SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 36m1 stop Los Angeles Los Angeles

08:10 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 50m1 stop Los Angeles Los Angeles

$1,557Qantas Airways

Mon, 26 Oct - Mon, 2 Nov

13:20 - 17:54SYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 34m1 stop San Francisco

19:06 - 06:20STL Lambert-St Louis-SYD Sydney Kingsford Smith

42h 14m1 stop San Francisco

$1,569United Airlines

Wed, 20 Jan - Sat, 13 Feb

11:20 - 18:08SYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 48m2 stops Los Angeles Los Angeles Chicago O'Hare Intl

19:06 - 06:20STL Lambert-St Louis-SYD Sydney Kingsford Smith

42h 14m1 stop San Francisco

$1,569United Airlines

Wed, 20 Jan - Sat, 13 Feb

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09:20 - 12:02SYD Sydney Kingsford Smith-STL Lambert-St Louis

41h 42m2 stops Vancouver Intl Chicago O'Hare Intl

16:39 - 08:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 56m2 stops Denver Intl Vancouver Intl

$1,595Air Canada

Thu, 17 Sep - Fri, 30 Oct

09:10 - 23:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 20m1 stop Los Angeles Los Angeles

18:44 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

43h 11m1 stop Dallas/Fort Worth

$1,637Qantas Airways

Thu, 17 Sep - Sat, 7 Nov

09:10 - 23:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 20m1 stop Los Angeles Los Angeles

08:10 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 50m1 stop Los Angeles Los Angeles

$1,639American Airlines

Thu, 17 Sep - Thu, 5 Nov

09:10 - 16:40SYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 30m2 stops Los Angeles Los Angeles Dallas/Fort Worth

08:10 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 50m1 stop Los Angeles Los Angeles

$1,639American Airlines

Thu, 17 Sep - Thu, 5 Nov

09:10 - 16:40SYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 30m2 stops Los Angeles Los Angeles Dallas/Fort Worth

14:54 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 06m2 stops Dallas/Fort Worth Los Angeles Los Angeles

$1,639American Airlines

Thu, 17 Sep - Sat, 7 Nov

09:10 - 23:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 20m1 stop Los Angeles Los Angeles

18:44 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

43h 11m1 stop Dallas/Fort Worth

$1,641Qantas Airways

Thu, 17 Sep - Sat, 7 Nov

09:15 - 16:47SYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 32m2 stops Los Angeles Los Angeles Minneapolis St Paul

07:00 - 08:30STL Lambert-St Louis-SYD Sydney Kingsford Smith

32h 30m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

$1,664Delta

Tue, 15 Sep - Thu, 5 Nov

09:10 - 23:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 20m1 stop Los Angeles Los Angeles

06:04 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 56m1 stop Los Angeles Los Angeles

$1,672Qantas Airways

Thu, 17 Sep - Fri, 30 Oct

17:50 - 09:24SYD Sydney Kingsford Smith-STL Lambert-St Louis

30h 34m3 stops Los Angeles Los Angeles Las Vegas Harry Reid Intl Dallas/Fort Worth

20:15 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

41h 10m3 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl Los Angeles Los Angeles

$1,711Multiple Airlines

Thu, 17 Sep - Sat, 7 Nov

09:10 - 18:38SYD Sydney Kingsford Smith-STL Lambert-St Louis

24h 28m2 stops Los Angeles Los Angeles Seattle/Tacoma Intl

06:04 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 56m1 stop Los Angeles Los Angeles

$1,723Multiple Airlines

Thu, 17 Sep - Fri, 30 Oct

Fly from

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Mon 5/10

14:35-18:20

1 stop19h 45m

Lambert-St Louis

Mon 12/10

15:20-05:00

1 stop21h 40m

$1,417

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 26/10

10:20-15:23

2 stops45h 03m

Lambert-St Louis

Mon 2/11

16:05-09:35

2 stops48h 30m

$1,419

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 12/10

10:20-20:20

2 stops26h 00m

Lambert-St Louis

Thu 5/11

13:40-09:35

2 stops26h 55m

$1,433

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Mon 5/10

14:35-21:59

1 stop23h 24m

Lambert-St Louis

Mon 12/10

11:31-05:00

2 stops25h 29m

$1,440

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 8/2

11:20-15:26

2 stops45h 06m

Lambert-St Louis

Mon 22/2

16:05-09:35

2 stops48h 30m

$1,459

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Fri 5/2

22:45-16:28

2 stops34h 43m

Lambert-St Louis

Tue 9/2

09:00-05:00

1 stop27h 00m

$1,481

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Sat 10/10

09:45-23:46

1 stop30h 01m

Lambert-St Louis

Mon 12/10

15:20-05:00

1 stop21h 40m

$1,551

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 26/10

11:10-23:46

1 stop28h 36m

Lambert-St Louis

Mon 2/11

08:10-09:00

1 stop31h 50m

$1,557

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 20/1

13:20-17:54

1 stop21h 34m

Lambert-St Louis

Sat 13/2

19:06-06:20

1 stop42h 14m

$1,569

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 20/1

11:20-18:08

2 stops23h 48m

Lambert-St Louis

Sat 13/2

19:06-06:20

1 stop42h 14m

$1,569

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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 September is, on average, the cheapest month to fly to St. Louis from Australia, with most prices found around $1,445. If you aren’t able to travel to St. Louis during the month of September, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $1,474.

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	September	18% cheaper	Flying from Sydney to St. Louis costs on average just $1,445 in September
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM SYDNEY	April	29% more expensive	It costs about $2,263 for flights to St. Louis from Sydney in April
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM SYDNEY	December	916% 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	$1,040
Best Round-Trip Price	$1,417
Fastest flight time	24h 10m

The best one-way flight price to St. Louis from Australia in the last 5 days is $1,040 (Melbourne to Lambert-St Louis).

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The best return flight price to St. Louis from Australia in the last 5 days is $1,417 (Melbourne to Lambert-St Louis).

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The fastest flight to St. Louis from Australia takes 24h 10m (Sydney Kingsford Smith to Lambert-St Louis).

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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 2026, there are 3 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?

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.

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Popular Flights to St. Louis

Melbourne to Lambert-St Louis Flightsfrom $1,115

Sydney Kingsford Smith to Lambert-St Louis Flightsfrom $1,068

Devonport to Lambert-St Louis Flightsfrom $2,484

Brisbane to Lambert-St Louis Flightsfrom $1,474

$1,040 Cheap flights to St. Louis

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to St. Louis departing on 2/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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