$230+ 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 25/1. 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
11 Jan — 18 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 12 December 2025.

Good round-trip deal

$267 or less

Good one-way deal

$163 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 12 December 2025.

Sun 15/306:38STL - SYD
1 stop34h 22mQantas Airways
Tue 24/317:50SYD - STL
2 stops39h 23mQantas Airways
Deal found 11/12$1,478
Sun 25/107:04STL - SYD
2 stops55h 31mQantas Airways
Sun 1/217:45SYD - STL
1 stop23h 14mQantas Airways
Deal found 11/12$1,490
Mon 23/215:31STL - SYD
2 stops36h 19mQantas Airways
Thu 9/409:10SYD - STL
1 stop29h 06mQantas Airways
Deal found 10/12$1,511
Mon 23/216:30STL - SYD
2 stops24h 05mMultiple Airlines
Thu 9/409:20SYD - STL
2 stops45h 04mMultiple Airlines
Deal found 10/12$1,609
Mon 16/306:38STL - SYD
2 stops34h 42mQantas Airways
Fri 20/313:05SYD - STL
1 stop20h 08mQantas Airways
Deal found 10/12$1,625
Fri 6/207:04STL - SYD
2 stops36h 56mQantas Airways
Tue 10/214:05SYD - STL
1 stop19h 09mQantas Airways
Deal found 9/12$1,657
Fri 6/218:00STL - SYD
2 stops46h 35mAir Canada
Tue 10/211:20SYD - STL
2 stops26h 38mAir Canada
Deal found 11/12$1,682
Sun 25/118:00STL - SYD
2 stops46h 35mAir Canada
Sun 1/211:20SYD - STL
2 stops50h 38mAir Canada
Deal found 11/12$1,696
Mon 26/116:05STL - SYD
2 stops48h 30mAir Canada
Sun 1/211:20SYD - STL
2 stops45h 09mAir Canada
Deal found 10/12$1,706
Fri 3/418:50STL - MEL
1 stop43h 10mQantas Airways
Sun 19/409:45MEL - STL
1 stop28h 31mQantas Airways
Deal found 11/12$1,756
Fri 3/410:07STL - MEL
2 stops27h 53mAmerican Airlines
Sun 19/409:45MEL - STL
2 stops24h 18mAmerican Airlines
Deal found 11/12$1,784
Fri 2/118:44STL - MEL
1 stop41h 16mQantas Airways
Thu 22/116:05MEL - STL
1 stop20h 24mQantas Airways
Deal found 12/12$1,919

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 12 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

Fri 6/2

07:04-13:00

2 stops36h 56m

Sydney Kingsford Smith

Tue 10/2

14:05-16:14

1 stop19h 09m

$1,657

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 6/2

18:00-09:35

2 stops46h 35m

Sydney Kingsford Smith

Tue 10/2

11:20-20:58

2 stops26h 38m

$1,682

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 2/5

18:00-06:55

1 stop21h 55m

Sydney Kingsford Smith

Sat 16/5

12:00-16:11

1 stop19h 11m

$1,736

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 26/1

06:45-06:20

1 stop30h 35m

Sydney Kingsford Smith

Wed 4/2

11:50-15:52

1 stop21h 02m

$1,747

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 28/1

14:45-09:05

2 stops25h 20m

Sydney Kingsford Smith

Wed 4/2

11:20-15:52

2 stops21h 32m

$1,753

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 25/1

06:00-07:00

1 stop32h 00m

Sydney Kingsford Smith

Sun 1/2

14:00-20:58

2 stops23h 58m

$1,753

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 25/1

06:00-07:00

1 stop32h 00m

Sydney Kingsford Smith

Tue 3/2

12:10-17:43

2 stops22h 33m

$1,753

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 3/4

18:50-06:00

1 stop43h 10m

Melbourne

Sun 19/4

09:45-23:16

1 stop28h 31m

$1,756

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 14/3

14:50-09:05

2 stops50h 15m

Sydney Kingsford Smith

Mon 23/3

11:50-20:55

2 stops25h 05m

$1,775

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 3/4

10:07-06:00

2 stops27h 53m

Melbourne

Sun 19/4

09:45-23:16

1 stop28h 31m

$1,784

Flights are sorted by cheapest return flights first.

Deals found on 10/12

Showing 1-10 of 36 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 5 December 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 $1,059). Flying from St. Louis in March will prove the most costly (average of $1,930). 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 (814 flights per day), New York (213 flights per day) and Dallas (211 flights per day).

Atlanta Hartsfield-Jackson
Atlanta Hartsfield-Jackson
From $162

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 $162. Explore other affordable destinations below.

Atlanta Hartsfield-Jackson
Atlanta Hartsfield-Jackson
From $162

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 12 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 Cancún, Denver, 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 $162 to Atlanta (prices may vary depending on the airline and departure time). On average, users have booked flights for $219 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 $5,560

  • 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 March. 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.