$304+ 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 16/6. 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
20 Jun — 27 Jun1
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 21 May 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. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Thu 6/8

06:01-08:15

2 stops35h 14m

Melbourne

Thu 20/8

10:55-18:39

1 stop22h 44m

$1,530

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 23/9

17:11-08:00

2 stops23h 49m

Sydney Kingsford Smith

Wed 7/10

11:05-18:14

2 stops23h 09m

$1,815

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 16/6

11:10-06:55

2 stops28h 45m

Sydney Kingsford Smith

Tue 23/6

10:20-21:10

2 stops25h 50m

$1,875

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 6/8

16:48-06:55

2 stops23h 07m

Sydney Kingsford Smith

Tue 25/8

10:20-18:39

1 stop23h 19m

$1,938

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 22/8

08:42-06:55

1 stop31h 13m

Sydney Kingsford Smith

Tue 8/9

09:30-16:34

2 stops22h 04m

$1,942

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 26/8

08:42-06:55

1 stop31h 13m

Sydney Kingsford Smith

Sat 12/9

09:30-16:34

2 stops22h 04m

$1,942

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 9/7

06:00-07:00

2 stops34h 00m

Sydney Kingsford Smith

Wed 22/7

10:20-21:26

2 stops26h 06m

$1,945

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 7/8

09:15-07:30

2 stops31h 15m

Melbourne

Thu 13/8

10:00-15:31

3 stops68h 31m

$1,956

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 9/8

14:40-11:20

3 stops29h 40m

Melbourne

Mon 17/8

20:50-20:07

3 stops38h 17m

$1,969

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 3/8

12:10-07:05

2 stops27h 55m

Brisbane

Mon 31/8

10:00-14:02

2 stops43h 02m

$1,989

Flights are sorted by cheapest return flights first.

Deals found on 21/5

Showing 1-10 of 45 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 $1,728). Flying from St. Louis in December will prove the most costly (average of $2,335). 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 (441 flights per day), Atlanta (215 flights per day) and Detroit (190 flights per day).

Dallas/Fort Worth
Dallas/Fort Worth
From $2,866

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

The cheapest city to fly to from St. Louis is Dallas/Fort Worth, with prices starting at $2,866. Explore other affordable destinations below.

Dallas/Fort Worth
Dallas/Fort Worth
From $2,866

Browse thousands of different options on Cheapflights for your next trip

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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 21 May 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, Dallas/Fort Worth Airport, 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 $2,866 to Dallas/Fort Worth Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for $3,292 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 $5,188

  • 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 $806 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 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.

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.

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