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$1,723+ Cheap flights from St. Louis (STL) to Cairns (CNS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CNS
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
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Cheap flight deals from St. Louis to Cairns

Cheapest flights from St. Louis to Cairns
Explore the most affordable flight options available from St. Louis to Cairns. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.

This American Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1910:21 am
STL
-
CNS
2 stops32h 44m
American Airlines
Sat 12/126:00 am
CNS
-
STL
2 stops29h 27m
American Airlines
Deal found 7/25$1,723
This oojo deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:05 pm
STL
-
CNS
2 stops24h 15m
Multiple Airlines
Sat 12/123:50 pm
CNS
-
STL
2 stops36h 42m
Multiple Airlines
Deal found 7/23$1,731
This oojo deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:05 pm
STL
-
CNS
2 stops27h 50m
Qantas Airways
Sat 12/129:15 am
CNS
-
STL
2 stops46h 12m
Qantas Airways
Deal found 7/26$1,740
This KAYAK deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/192:23 pm
STL
-
CNS
3 stops28h 42m
Qantas Airways
Sat 12/126:00 am
CNS
-
STL
2 stops26h 36m
Qantas Airways
Deal found 7/25$2,009
This Air Canada deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/194:05 pm
STL
-
CNS
3 stops57h 20m
Multiple Airlines
Sat 12/126:05 pm
CNS
-
STL
3 stops61h 21m
Multiple Airlines
Deal found 7/25$2,969

Find flight deals from St. Louis to Cairns

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Cairns (CNS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,723
(American Airlines)
Provider with most accurate pricing for Lambert-St Louis-Cairns flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Cairns flights.
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From Lambert-St Louis to Cairns
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Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Cairns that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
Use the filters below to find and compare flights from St. Louis to Cairns that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Thu 11/19

10:21 am-11:05 am

2 stops32h 44m

Cairns

Sat 12/12

6:00 am-7:27 pm

2 stops29h 27m

$1,723
Quickest round-trip

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Wed 11/18

7:05 pm-11:20 am

2 stops24h 15m

Cairns

Sat 12/12

3:50 pm-12:32 pm

2 stops36h 42m

$1,731

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Wed 11/18

7:05 pm-2:55 pm

2 stops27h 50m

Cairns

Sat 12/12

9:15 am-3:27 pm

2 stops46h 12m

$1,740

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Thu 11/19

4:05 pm-5:25 pm

3 stops57h 20m

Cairns

Sat 12/12

6:05 pm-3:26 pm

3 stops61h 21m

$2,969

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on St. Louis-Cairns flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Cairns flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Cairns flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Cairns flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Cairns flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Cairns

Have a flexible travel schedule? Discover the best time to fly to Cairns from St. Louis with our price prediction graph.
Estimated round-trip 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.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Cairns. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Cairns?

    For as low as $1,740, American Airlines can have you in Cairns from St. Louis in 27h 50m. St. Louis and Cairns are separated by a distance of 8749 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from St. Louis to Cairns that include hotel bookings?

    Yes. In addition to deals on St. Louis to Cairns flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Cairns?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Cairns.

  • Can I find deals for business class flights from St. Louis to Cairns?

    Yes. Cheapflights offers flight deals from St. Louis to Cairns by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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