$963 Cheap Flights from St. Louis (STL) to Cairns (CNS)

View $963 flight on Fri, Apr 3, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Cairns Intl. Airport (CNS)

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Cheap Flights from St. Louis to Cairns (STL-CNS)

Prices were available within the past 7 days and start at $963 for one-way flights and $1,157 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fiji Airways
Tue, Mar 31 - Sat, Apr 18
STL
St. Louis
CNS
Cairns
$1,157 Roundtrip, found 3 days ago
$1,157
Roundtrip
found 3 days ago
Select Fiji Airways flight, departing Tue, Mar 31 from St. Louis to Cairns, returning Sat, Apr 18, priced at $1,157 found 3 days ago
Fiji Airways
Thu, Apr 2 - Sat, Apr 18
STL
St. Louis
CNS
Cairns
$1,220 Roundtrip, found 3 days ago
$1,220
Roundtrip
found 3 days ago
Select Fiji Airways flight, departing Thu, Apr 2 from St. Louis to Cairns, returning Sat, Apr 18, priced at $1,220 found 3 days ago
Qantas Airways
Tue, Mar 31 - Fri, Apr 24
STL
St. Louis
CNS
Cairns
$1,643 Roundtrip, found 3 days ago
$1,643
Roundtrip
found 3 days ago
Select Qantas Airways flight, departing Tue, Mar 31 from St. Louis to Cairns, returning Fri, Apr 24, priced at $1,643 found 3 days ago
Qantas Airways
Tue, Mar 31 - Wed, Apr 22
STL
St. Louis
CNS
Cairns
$1,656 Roundtrip, found 3 days ago
$1,656
Roundtrip
found 3 days ago
Select Qantas Airways flight, departing Tue, Mar 31 from St. Louis to Cairns, returning Wed, Apr 22, priced at $1,656 found 3 days ago
Qantas Airways
Tue, Mar 31 - Mon, Apr 20
STL
St. Louis
CNS
Cairns
$1,704 Roundtrip, found 3 days ago
$1,704
Roundtrip
found 3 days ago
Select Qantas Airways flight, departing Tue, Mar 31 from St. Louis to Cairns, returning Mon, Apr 20, priced at $1,704 found 3 days ago
Qantas Airways
Tue, Apr 28 - Thu, May 7
STL
St. Louis
CNS
Cairns
$1,706 Roundtrip, found 5 days ago
$1,706
Roundtrip
found 5 days ago
Select Qantas Airways flight, departing Tue, Apr 28 from St. Louis to Cairns, returning Thu, May 7, priced at $1,706 found 5 days ago
Qantas Airways
Tue, Apr 28 - Thu, May 7
STL
St. Louis
CNS
Cairns
$1,708 Roundtrip, found 5 days ago
$1,708
Roundtrip
found 5 days ago
Select Qantas Airways flight, departing Tue, Apr 28 from St. Louis to Cairns, returning Thu, May 7, priced at $1,708 found 5 days ago
American Airlines
Fri, Apr 3 - Tue, Apr 21
STL
St. Louis
CNS
Cairns
$1,829 Roundtrip, found 3 days ago
$1,829
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Apr 3 from St. Louis to Cairns, returning Tue, Apr 21, priced at $1,829 found 3 days ago
United
Fri, Apr 3 - Tue, Apr 21
STL
St. Louis
CNS
Cairns
$1,936 Roundtrip, found 3 days ago
$1,936
Roundtrip
found 3 days ago
Select United flight, departing Fri, Apr 3 from St. Louis to Cairns, returning Tue, Apr 21, priced at $1,936 found 3 days ago
Air Canada
Tue, Apr 28 - Thu, May 7
STL
St. Louis
CNS
Cairns
$2,098 Roundtrip, found 5 days ago
$2,098
Roundtrip
found 5 days ago
Select Air Canada flight, departing Tue, Apr 28 from St. Louis to Cairns, returning Thu, May 7, priced at $2,098 found 5 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Cairns Intl. Airport (CNS) cost?
Lock in a cheap one-way flight from $963 or cheap return flight from $1,157 from Lambert-St. Louis Intl. Airport (STL) to Cairns Intl. Airport (CNS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Cairns Intl. Airport (CNS)?
Planning your trip for March can help you save, as it's the cheapest month for flights between STL and CNS. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Cairns Intl. Airport (CNS)?
To find the cheapest airline that'll fly you from STL to CNS, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Cairns Intl. Airport (CNS)?
You'll have to book a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Cairns Intl. Airport (CNS). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from STL to CNS?
Generally you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can change based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Cairns Intl. Airport (CNS)?
To reach Cairns Intl. Airport (CNS) on time, select a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Cairns Intl. Airport (CNS) last-minute?
Holding off until just before your trip to book your flight from STL to CNS often results in higher prices. While you may come across some last-minute deals, they're not always guaranteed. Be flexible with your itinerary to boost your chances of scoring a bargain.
Is it cheaper to book a STL to CNS flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to CNS flight and hotel package with Expedia could lead to significant savings. What's more, having it all in one place will take the stress out of planning your trip. Simply secure your flights and select from our extensive range of stays, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Cairns Intl. Airport (CNS)?
In most cases, you can reschedule or cancel your STL to CNS flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you'd like further details, visit our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Cairns Intl.
Roundtrip price
$1,156
Distance
8754 mi

Book with confidence

St. Louis to Cairns Flights

The cheapest times to fly from St. Louis to Cairns

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Cairns are during the month of March. You can find some of the cheapest flights from St. Louis to Cairns with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Cairns

Sunday is one of the best days to book for cheap flights from St. Louis to Cairns: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Cairns

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Cairns in 2025. You can also book with separate airlines for your outbound and return journeys, from $963 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Cairns flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Cairns airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Cairns Flights

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