$259+ 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 21/8. 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
3 Aug — 10 Aug1
1 adult
1 adult, Economy, 0 bags

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 4 July 2026. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 17/8

12:52-06:50

2 stops26h 58m

Sydney Kingsford Smith

Mon 24/8

09:15-18:55

2 stops24h 40m

$1,715

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 27/10

19:05-09:30

1 stop22h 25m

Melbourne

Wed 11/11

12:45-22:10

1 stop26h 25m

$1,728

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 20/10

13:29-09:15

2 stops27h 46m

Melbourne

Tue 3/11

12:45-20:34

2 stops24h 49m

$1,734

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 14/8

15:13-07:30

2 stops25h 17m

Melbourne

Fri 21/8

10:55-20:46

2 stops24h 51m

$1,734

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 16/8

12:59-08:15

2 stops28h 16m

Melbourne

Sun 23/8

09:30-20:29

2 stops25h 59m

$1,734

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Wed 12/8

16:40-07:30

2 stops23h 50m

Melbourne

Wed 19/8

09:30-22:00

2 stops27h 30m

$1,734

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 12/8

08:42-06:55

1 stop31h 13m

Sydney Kingsford Smith

Fri 21/8

10:20-18:39

1 stop23h 19m

$1,781

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 22/8

09:00-07:00

2 stops31h 00m

Sydney Kingsford Smith

Tue 8/9

09:30-17:06

2 stops22h 36m

$1,787

St. LouisCanberra

STL - CBR

STLCBR

Lambert-St Louis

Tue 28/7

19:23-13:15

2 stops26h 52m

Canberra

Tue 4/8

08:10-18:17

2 stops25h 07m

$1,863

St. LouisCanberra

STL - CBR

STLCBR

Lambert-St Louis

Mon 27/7

06:01-10:40

3 stops37h 39m

Canberra

Tue 4/8

08:10-18:17

2 stops25h 07m

$1,868

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 43 resultsSorted by cheapest first
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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.

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

Currently, March is the cheapest month in which you can book a flight from St. Louis (average of $1,807). Flying from St. Louis in June will prove the most costly (average of $2,459). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

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Direct flights from Missouri

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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 4 July 2026.

  • 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, Atlanta, Boston. Denver, Cancún, Atlanta are the most popular locations from St. Louis year round.

  • What is the cheapest first class flight from St. Louis?

    If you’re looking to fly first-class from St. Louis to anywhere, put Charlotte on your list as prices start at $828 for this destination.

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

    Currently, the cheapest month for flights from St. Louis is March. The most expensive month for flights is June. 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

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.

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