$178+ 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 17/12. 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
21 Dec — 28 Dec1
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 21 November 2025.

Cheapest airline

United Airlines

Good round-trip deal

$108 or less
On average, United Airlines currently has the cheapest one-way flight from Lambert-St Louis (avg. price of $2,533).
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Price to beat on a round-trip flight from Lambert-St Louis.
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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 21 November 2025.

Sun 11/114:45STL - BNE
2 stops26h 00mMultiple Airlines
Tue 27/110:45BNE - STL
2 stops44h 44mMultiple Airlines
Deal found 19/11$1,462
Mon 12/116:05STL - BNE
2 stops48h 40mAir Canada
Tue 27/110:45BNE - STL
2 stops44h 44mAir Canada
Deal found 19/11$1,465
Sun 8/207:04STL - SYD
1 stop32h 56mQantas Airways
Sat 14/207:05SYD - STL
2 stops33h 43mQantas Airways
Deal found 19/11$1,483
Mon 12/116:05STL - BNE
2 stops48h 40mMultiple Airlines
Tue 27/106:10BNE - STL
3 stops49h 19mMultiple Airlines
Deal found 19/11$1,493
Mon 23/314:50STL - BNE
2 stops25h 55mAir Canada
Thu 2/410:00BNE - STL
2 stops21h 52mAir Canada
Deal found 20/11$1,502
Fri 6/207:04STL - BNE
1 stop29h 56mQantas Airways
Tue 10/218:30BNE - STL
2 stops36h 13mQantas Airways
Deal found 18/11$1,542
Mon 2/207:04STL - SYD
1 stop32h 56mQantas Airways
Mon 9/219:15SYD - STL
2 stops45h 44mQantas Airways
Deal found 19/11$1,547
Fri 6/214:45STL - BNE
2 stops26h 00mAir Canada
Tue 10/210:45BNE - STL
2 stops44h 44mAir Canada
Deal found 18/11$1,584
Sat 6/1216:05STL - BNE
2 stops48h 40mAir Canada
Thu 11/1210:45BNE - STL
2 stops44h 44mAir Canada
Deal found 19/11$1,587
Sun 7/1211:34STL - BNE
1 stop26h 56mAmerican Airlines
Tue 16/1209:40BNE - STL
1 stop22h 54mAmerican Airlines
Deal found 19/11$1,588
Fri 5/1215:19STL - BNE
2 stops24h 11mUnited Airlines
Tue 16/1211:40BNE - STL
1 stop20h 47mUnited Airlines
Deal found 19/11$1,602
Mon 2/207:04STL - MEL
2 stops34h 21mQantas Airways
Sat 14/216:05MEL - STL
1 stop20h 14mQantas Airways
Deal found 20/11$1,644

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 November 2025. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Sydney

Route

Depart

Return

Price

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 6/2

07:04-05:00

1 stop29h 56m

Brisbane

Tue 10/2

18:30-14:43

2 stops36h 13m

$1,542

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 8/12

17:30-07:30

1 stop22h 00m

Brisbane

Wed 17/12

11:40-16:27

1 stop20h 47m

$1,602

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 5/12

15:19-07:30

2 stops24h 11m

Brisbane

Thu 11/12

11:40-16:27

1 stop20h 47m

$1,602

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 5/12

17:30-07:30

1 stop22h 00m

Brisbane

Sun 14/12

11:40-16:27

1 stop20h 47m

$1,602

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 4/12

17:30-07:30

1 stop22h 00m

Brisbane

Sun 14/12

11:40-16:27

1 stop20h 47m

$1,602

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 8/12

17:30-07:30

1 stop22h 00m

Brisbane

Sat 13/12

11:40-16:29

1 stop20h 49m

$1,602

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 6/12

17:30-07:30

1 stop22h 00m

Brisbane

Sat 13/12

11:40-16:29

1 stop20h 49m

$1,602

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 8/12

15:19-07:30

2 stops24h 11m

Brisbane

Tue 16/12

11:40-16:27

1 stop20h 47m

$1,602

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 4/12

17:30-07:30

1 stop22h 00m

Brisbane

Thu 18/12

11:40-22:30

1 stop26h 50m

$1,602

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 7/12

17:30-07:30

1 stop22h 00m

Brisbane

Fri 12/12

11:40-16:27

1 stop20h 47m

$1,602

Flights are sorted by cheapest return flights first.

Deals found on 19/11

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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, August is the cheapest month in which you can book a flight from St. Louis (average of $1,089). Flying from St. Louis in February will prove the most costly (average of $1,955). 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 (702 flights per day), Atlanta (218 flights per day) and New York (199 flights per day).

Denver Intl
Denver Intl
From $107

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

The cheapest city to fly to from St. Louis is Denver Intl, with prices starting at $107. Explore other affordable destinations below.

Denver Intl
Denver Intl
From $107

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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 21 November 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 $107 to Denver (prices may vary depending on the airline and departure time). On average, users have booked flights for $108 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 $5,720

  • 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.

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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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