$219+ 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 24/1. 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
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

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 5 December 2025.

Good round-trip deal

$269 or less

Good one-way deal

$165 or less
Price to beat on a round-trip flight from Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis.
Search Deals

Find flights from St. Louis

Enter your travel dates to find the best prices.

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 5 December 2025.

Tue 27/108:45STL - BNE
2 stops32h 00mAir Canada
Fri 13/210:45BNE - STL
2 stops44h 44mAir Canada
Deal found 3/12$1,431
Sun 18/114:45STL - BNE
2 stops26h 00mMultiple Airlines
Sun 25/110:45BNE - STL
2 stops44h 44mMultiple Airlines
Deal found 4/12$1,432
Mon 16/316:05STL - BNE
2 stops48h 40mAir Canada
Fri 20/309:45BNE - STL
2 stops44h 44mAir Canada
Deal found 4/12$1,435
Tue 27/110:07STL - BNE
2 stops30h 38mMultiple Airlines
Fri 13/206:10BNE - STL
3 stops49h 19mMultiple Airlines
Deal found 3/12$1,458
Sat 7/216:05STL - SYD
2 stops48h 30mAir Canada
Wed 18/211:20SYD - STL
2 stops45h 09mAir Canada
Deal found 3/12$1,459
Tue 27/117:04STL - BNE
2 stops32h 06mQantas Airways
Fri 13/219:40BNE - STL
1 stop20h 08mQantas Airways
Deal found 3/12$1,465
Sat 7/207:04STL - SYD
1 stop32h 56mQantas Airways
Wed 18/207:05SYD - STL
2 stops33h 43mQantas Airways
Deal found 3/12$1,487
Mon 26/111:55STL - BNE
2 stops37h 15mQantas Airways
Thu 12/219:40BNE - STL
1 stop20h 08mQantas Airways
Deal found 3/12$1,512
Wed 4/317:55STL - SYD
2 stops33h 55mQantas Airways
Thu 19/311:20SYD - STL
1 stop28h 39mQantas Airways
Deal found 2/12$1,518
Mon 16/311:47STL - BNE
2 stops26h 13mAmerican Airlines
Fri 20/319:40BNE - STL
1 stop19h 19mAmerican Airlines
Deal found 4/12$1,541
Thu 5/316:05STL - SYD
2 stops48h 30mAir Canada
Wed 11/310:20SYD - STL
2 stops45h 09mAir Canada
Deal found 3/12$1,620
Fri 6/207:04STL - SYD
2 stops33h 16mQantas Airways
Tue 10/214:05SYD - STL
1 stop19h 09mQantas Airways
Deal found 4/12$1,667

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 5 December 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

Sat 7/2

07:04-09:00

1 stop32h 56m

Sydney Kingsford Smith

Wed 18/2

07:05-23:48

2 stops33h 43m

$1,487

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 28/1

14:45-07:30

2 stops24h 45m

Brisbane

Tue 10/2

11:40-15:37

1 stop19h 57m

$1,553

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 25/1

17:00-07:30

1 stop22h 30m

Brisbane

Mon 16/2

11:40-21:00

2 stops25h 20m

$1,553

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 30/1

17:00-07:30

1 stop22h 30m

Brisbane

Thu 12/2

11:40-16:44

1 stop21h 04m

$1,553

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 30/1

13:15-07:30

2 stops26h 15m

Brisbane

Mon 16/2

11:40-21:00

2 stops25h 20m

$1,553

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 29/1

17:00-07:30

1 stop22h 30m

Brisbane

Thu 12/2

11:40-16:44

1 stop21h 04m

$1,553

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 30/1

17:00-07:30

1 stop22h 30m

Brisbane

Sat 14/2

11:40-17:44

2 stops22h 04m

$1,553

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 25/1

17:00-07:30

1 stop22h 30m

Brisbane

Tue 10/2

11:40-20:58

2 stops25h 18m

$1,553

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 25/1

18:57-08:20

2 stops45h 23m

Brisbane

Sun 15/2

10:40-19:22

2 stops24h 42m

$1,555

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 29/1

18:57-08:20

2 stops45h 23m

Brisbane

Sun 15/2

10:40-23:36

2 stops28h 56m

$1,555

Flights are sorted by cheapest return flights first.

Deals found on 2/12

Showing 1-10 of 37 results
1
2
3
4

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 28 November 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 $1,066). Flying from St. Louis in February will prove the most costly (average of $1,921). 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 (756 flights per day), Dallas (221 flights per day) and Atlanta (169 flights per day).

Atlanta Hartsfield-Jackson
Atlanta Hartsfield-Jackson
From $163

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

The cheapest city to fly to from St. Louis is Atlanta Hartsfield-Jackson, with prices starting at $163. Explore other affordable destinations below.

Atlanta Hartsfield-Jackson
Atlanta Hartsfield-Jackson
From $163

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Direct flights from Missouri

Book a direct flight from one of these other cities located in Missouri.
Direct flights from Kansas City
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 5 December 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 Denver, Cancún, Atlanta. Denver, Cancún, 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 $163 to Atlanta (prices may vary depending on the airline and departure time). On average, users have booked flights for $221 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 $5,599

  • 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 February. 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.

See more FAQs

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.