$226+ Cheap flights from St. Louis

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — SYD
24 Aug — 31 Aug1
1 adult

What to know about flights from St. Louis

Discover essential information about flights departing from St. Louis, including flight schedules, destinations, airlines operating at the St. Louis airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 19 August 2025.

Cheapest airline

United Airlines

Good one-way deal

$885 or less
On average, United Airlines currently has the cheapest one-way flight from Lambert-St Louis (avg. price of $2,527).
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Price to beat on a one-way flight from Lambert-St Louis.
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Find flights from St. Louis

Cheapest flights from St. Louis
Explore the most affordable flight options available from St. Louis. Find the lowest fares based on data from user searches, with prices last updated on 19 August 2025.

Wed 11/206:00STL - SYD
2 stops42h 40mQantas Airways
Sat 28/211:15SYD - STL
1 stop28h 53mQantas Airways
Deal found 19/8$1,522
Wed 19/1109:00STL - BNE
2 stops31h 45mAir Canada
Tue 25/1110:45BNE - STL
2 stops44h 44mAir Canada
Deal found 18/8$1,525
Fri 7/1116:05STL - BNE
2 stops48h 40mAir Canada
Mon 24/1110:45BNE - STL
2 stops44h 44mAir Canada
Deal found 17/8$1,528
Tue 3/216:05STL - BNE
2 stops48h 40mAir Canada
Tue 10/206:05BNE - STL
3 stops49h 24mAir Canada
Deal found 17/8$1,563
Fri 7/1113:20STL - BNE
1 stop25h 10mQantas Airways
Mon 24/1109:40BNE - STL
1 stop18h 57mQantas Airways
Deal found 17/8$1,569
Mon 26/106:00STL - SYD
1 stop34h 00mQantas Airways
Mon 9/219:15SYD - STL
2 stops37h 59mQantas Airways
Deal found 18/8$1,585
Wed 19/1116:05STL - BNE
2 stops48h 40mMultiple Airlines
Tue 25/1106:10BNE - STL
3 stops49h 19mMultiple Airlines
Deal found 18/8$1,609
Tue 18/1107:00STL - BNE
1 stop30h 00mQantas Airways
Tue 25/1119:25BNE - STL
1 stop20h 17mQantas Airways
Deal found 18/8$1,629
Mon 17/1109:00STL - BNE
2 stops31h 45mAir Canada
Thu 27/1110:45BNE - STL
2 stops44h 44mAir Canada
Deal found 18/8$1,634
Mon 17/1117:29STL - BNE
1 stop22h 01mUnited Airlines
Thu 27/1111:40BNE - STL
1 stop20h 47mUnited Airlines
Deal found 18/8$1,640
Mon 10/1107:00STL - SYD
2 stops34h 55mQantas Airways
Fri 21/1114:20SYD - STL
1 stop19h 20mQantas Airways
Deal found 18/8$1,659
Sun 2/1118:13STL - MEL
2 stops28h 22mQantas Airways
Sat 15/1112:00MEL - STL
1 stop28h 42mQantas Airways
Deal found 19/8$1,662

Find flights from St. Louis within your budget

 
Find flights departing from St. Louis that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 19 August 2025. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Sydney

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 11/2

06:00-17:40

2 stops42h 40m

Sydney Kingsford Smith

Sat 28/2

11:15-23:08

1 stop28h 53m

$1,522

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 19/11

09:00-08:45

2 stops31h 45m

Brisbane

Tue 25/11

10:45-15:29

2 stops44h 44m

$1,525

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 7/11

16:05-08:45

2 stops48h 40m

Brisbane

Mon 24/11

10:45-15:29

2 stops44h 44m

$1,528

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 3/2

16:05-08:45

2 stops48h 40m

Brisbane

Tue 10/2

10:45-15:29

2 stops44h 44m

$1,528

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 3/2

16:07-06:30

1 stop22h 23m

Brisbane

Tue 10/2

09:40-16:14

1 stop22h 34m

$1,569

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 7/11

13:20-06:30

1 stop25h 10m

Brisbane

Mon 24/11

09:40-12:37

1 stop18h 57m

$1,569

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 26/1

06:00-09:00

1 stop34h 00m

Sydney Kingsford Smith

Mon 9/2

19:15-16:14

2 stops37h 59m

$1,585

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 19/11

16:05-08:45

2 stops48h 40m

Brisbane

Tue 25/11

06:10-15:29

3 stops49h 19m

$1,609

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 18/11

07:00-05:00

1 stop30h 00m

Brisbane

Tue 25/11

19:25-23:42

1 stop20h 17m

$1,629

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 17/11

09:00-08:45

2 stops31h 45m

Brisbane

Thu 27/11

10:45-15:29

2 stops44h 44m

$1,634

Flights are sorted by cheapest return flights first.

Deals found on 17/8

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Best time to book a flight from St. Louis

Have a flexible travel schedule? Discover the best time to fly from St. Louis with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from St. Louis

Get recent, data-driven insights about flights from St. Louis including ideal travel times, pricing trends, and more.

When is the best time to book a flight from St. Louis?

Use this chart to determine the optimal time to book a return flight from St. Louis to Sydney. Price data was last updated on 8 August 2025.

The best time to book flights from St. Louis is 57 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis?

Currently, August is the cheapest month in which you can book a flight from St. Louis (average of $1,048). Flying from St. Louis in December will prove the most costly (average of $2,063). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

What are popular destinations to fly to from St. Louis?

St. Louis offers frequent flights to Chicago (694 flights per day), Atlanta (234 flights per day) and Detroit (194 flights per day).

San Francisco
San Francisco
From $576

What is the cheapest place to fly to from St. Louis?

The cheapest city to fly to from St. Louis is San Francisco, with prices starting at $885. Explore other affordable destinations below.

San Francisco
San Francisco
From $576

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Direct flights from Missouri

Book a direct flight from one of these other cities located in Missouri.
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Direct flights from Springfield

Related info for your journey

Access useful and relevant information related to your journey from St. Louis. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 19 August 2025.

  • What are the most popular destinations to fly to from St. Louis?

    For the current month, the most popular flights from St. Louis are Boston, Cancún, Atlanta. Cancún, Boston, Atlanta are the most popular locations from St. Louis year round.

  • What is the cheapest flight from St. Louis to anywhere?

    Users have flown out of St. Louis for as low as $885 to San Francisco (prices may vary depending on the airline and departure time). On average, users have booked flights for $1,130 to fly from St. Louis.

  • What is the cheapest premium economy flight from St. Louis?

    Options for some of the cheapest premium economy flights from St. Louis we have found on Cheapflights are as follows:
    Fly from Lambert-St Louis to Houston George Bush Intcntl Airport starting at $5,690

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

    Currently, the cheapest month for flights from St. Louis is August. The most expensive month for flights is December. The cheapest prices are shown above but prices will vary according to departure times, airlines, class and how early you book.

  • How does Cheapflights help users find flights from St. Louis?

    When you search for this flight from St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.

  • Why should you use Cheapflights to find cheap flight tickets from St. Louis?

    Cheapflights helps you find that perfect flight from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

  • Can Cheapflights find flights from St. Louis with no change fees?

    Yes, we can. To see specific flights from St. Louis with no change fees, users can toggle flexible booking options after using the search form above to find flights.

  • Can Cheapflights notify me if prices for flights from St. Louis become cheaper?

    Yes, Cheapflights offers price alerts on flights from St. Louis so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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Fly with Cheapflights

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How does Cheapflights help users find flights from St. Louis?

When you search for this flight from St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.

Why should you use Cheapflights to find cheap flight tickets from St. Louis?

Cheapflights helps you find that perfect flight from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from St. Louis with no change fees?

Yes, we can. To see specific flights from St. Louis with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from St. Louis become cheaper?

Yes, Cheapflights offers price alerts on flights from St. Louis so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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