$681 Cheap Flights from St. Louis (STL) to Cairns (CNS)

View $681 flight on Sat, Oct 25, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $681 for one-way flights and $1,369 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fiji Airways
Tue, Aug 19 - Thu, Aug 28
STL
St. Louis
CNS
Cairns
$1,369 Roundtrip, found 6 days ago
$1,369
Roundtrip
found 6 days ago
Select Fiji Airways flight, departing Tue, Aug 19 from St. Louis to Cairns, returning Thu, Aug 28, priced at $1,369 found 6 days ago
Fiji Airways
Tue, Aug 26 - Sat, Aug 30
STL
St. Louis
CNS
Cairns
$1,384 Roundtrip, found 2 days ago
$1,384
Roundtrip
found 2 days ago
Select Fiji Airways flight, departing Tue, Aug 26 from St. Louis to Cairns, returning Sat, Aug 30, priced at $1,384 found 2 days ago
Fiji Airways
Tue, Aug 19 - Sat, Aug 30
STL
St. Louis
CNS
Cairns
$1,419 Roundtrip, found 6 days ago
$1,419
Roundtrip
found 6 days ago
Select Fiji Airways flight, departing Tue, Aug 19 from St. Louis to Cairns, returning Sat, Aug 30, priced at $1,419 found 6 days ago
Fiji Airways
Sat, Aug 23 - Thu, Aug 28
STL
St. Louis
CNS
Cairns
$1,446 Roundtrip, found 6 days ago
$1,446
Roundtrip
found 6 days ago
Select Fiji Airways flight, departing Sat, Aug 23 from St. Louis to Cairns, returning Thu, Aug 28, priced at $1,446 found 6 days ago
Fiji Airways
Sat, Aug 23 - Thu, Aug 28
STL
St. Louis
CNS
Cairns
$1,448 Roundtrip, found 2 days ago
$1,448
Roundtrip
found 2 days ago
Select Fiji Airways flight, departing Sat, Aug 23 from St. Louis to Cairns, returning Thu, Aug 28, priced at $1,448 found 2 days ago
Fiji Airways
Tue, Aug 19 - Mon, Aug 25
STL
St. Louis
CNS
Cairns
$1,469 Roundtrip, found 6 days ago
$1,469
Roundtrip
found 6 days ago
Select Fiji Airways flight, departing Tue, Aug 19 from St. Louis to Cairns, returning Mon, Aug 25, priced at $1,469 found 6 days ago
Qantas Airways
Thu, Mar 19 - Thu, Mar 26
STL
St. Louis
CNS
Cairns
$1,508 Roundtrip, found 6 days ago
$1,508
Roundtrip
found 6 days ago
Select Qantas Airways flight, departing Thu, Mar 19 from St. Louis to Cairns, returning Thu, Mar 26, priced at $1,508 found 6 days ago
American Airlines
Sun, Aug 24 - Sun, Aug 31
STL
St. Louis
CNS
Cairns
$1,563 Roundtrip, found 2 days ago
$1,563
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sun, Aug 24 from St. Louis to Cairns, returning Sun, Aug 31, priced at $1,563 found 2 days ago
Air Canada
Sun, Jun 21 - Sat, Jun 27
STL
St. Louis
CNS
Cairns
$2,337 Roundtrip, found 3 days ago
$2,337
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sun, Jun 21 from St. Louis to Cairns, returning Sat, Jun 27, priced at $2,337 found 3 days ago
Air New Zealand
Thu, Aug 21 - Thu, Aug 28
STL
St. Louis
CNS
Cairns
$2,412 Roundtrip, found 5 days ago
$2,412
Roundtrip
found 5 days ago
Select Air New Zealand flight, departing Thu, Aug 21 from St. Louis to Cairns, returning Thu, Aug 28, priced at $2,412 found 5 days ago

Alternative airports near Cairns

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Cairns Intl. CNS. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $1,765
CNS
Cairns Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $1,765
Flights from St. Louis (STL) to Cairns (CNS)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Cairns Intl.
Airlines serving
Japan Airlines, Qantas Airways, United
Roundtrip price
$1,369
Distance
8754 mi

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 August. 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 $681 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.

 

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 $681 or cheap return flight from $1,369 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 August 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.

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*Available to One Key members.