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Cheap flights from St. Louis to Cairns from $507

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Cairns departing on 8/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Cairns

Cheap round-trip flights

Enter your travel dates to find the best prices.
Qantas Airways Logo
6:00 am - 10:40 pm
STL
-
CNS
49h 40m
2 stops
Qantas Airways Logo
6:50 am - 10:55 pm
CNS
-
STL
55h 05m
2 stops
$1,855Qantas Airways
Sat, Aug 8 - Wed, Aug 12
Qantas Airways Logo
6:35 am - 10:35 am
STL
-
CNS
37h 00m
2 stops
Qantas Airways Logo
2:00 pm - 11:56 pm
CNS
-
STL
48h 56m
2 stops
$1,926Qantas Airways
Mon, Jun 8 - Mon, Jun 15
Multiple Airlines Logo
2:15 pm - 6:25 pm
STL
-
CNS
37h 10m
3 stops
Multiple Airlines Logo
7:10 pm - 12:06 pm
CNS
-
STL
55h 56m
3 stops
$1,958Multiple Airlines
Mon, Jun 8 - Mon, Jun 15
United Airlines Logo
6:01 am - 3:55 pm
STL
-
CNS
42h 54m
3 stops
United Airlines Logo
6:00 am - 6:24 pm
CNS
-
STL
27h 24m
2 stops
$2,452United Airlines
Sat, Aug 8 - Wed, Aug 12
Multiple Airlines Logo
5:18 pm - 12:45 pm
STL
-
CNS
28h 27m
2 stops
Multiple Airlines Logo
6:00 am - 6:33 pm
CNS
-
STL
27h 33m
3 stops
$2,462Multiple Airlines
Mon, Jun 8 - Mon, Jun 15
United Airlines Logo
6:01 am - 3:55 pm
STL
-
CNS
42h 54m
3 stops
United Airlines Logo
6:00 am - 3:38 pm
CNS
-
STL
48h 38m
3 stops
$2,477United Airlines
Sat, Aug 8 - Wed, Aug 12

Qantas Airways flights from St. Louis to Cairns

Our best Qantas Airways deals on St. Louis to Cairns flight tickets
Qantas Airways
Aug 8
STL6:00 amLambert-St Louis
49h 40m
2 stops
CNS10:40 pmCairns
Aug 12
CNS6:50 amCairns
55h 05m
2 stops
STL10:55 pmLambert-St Louis
$1,855
Qantas Airways
Jun 8
STL6:35 amLambert-St Louis
37h 00m
2 stops
CNS10:35 amCairns
Jun 15
CNS2:00 pmCairns
48h 56m
2 stops
STL11:56 pmLambert-St Louis
$1,926

United Airlines flights from St. Louis to Cairns

Our best United Airlines deals on St. Louis to Cairns flight tickets
United Airlines
Aug 8
STL6:01 amLambert-St Louis
42h 54m
3 stops
CNS3:55 pmCairns
Aug 12
CNS6:00 amCairns
27h 24m
2 stops
STL6:24 pmLambert-St Louis
$2,452
United Airlines
Aug 8
STL6:01 amLambert-St Louis
42h 54m
3 stops
CNS3:55 pmCairns
Aug 12
CNS6:00 amCairns
48h 38m
3 stops
STL3:38 pmLambert-St Louis
$2,477

momondo 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, momondo users made 832,500 searches. Data last updated April 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

Sat 8/8

6:00 am-10:40 pm

2 stops49h 40m

Cairns

Wed 8/12

6:50 am-10:55 pm

2 stops55h 05m

$1,855

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Mon 6/8

6:35 am-10:35 am

2 stops37h 00m

Cairns

Mon 6/15

2:00 pm-11:56 pm

2 stops48h 56m

$1,926

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Mon 6/8

2:15 pm-6:25 pm

3 stops37h 10m

Cairns

Mon 6/15

7:10 pm-12:06 pm

3 stops55h 56m

$1,958

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Sat 8/8

6:01 am-3:55 pm

3 stops42h 54m

Cairns

Wed 8/12

6:00 am-6:24 pm

2 stops27h 24m

$2,452
Quickest round-trip

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Mon 6/8

5:18 pm-12:45 pm

2 stops28h 27m

Cairns

Mon 6/15

6:00 am-6:33 pm

3 stops27h 33m

$2,462

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Sat 8/8

6:01 am-3:55 pm

3 stops42h 54m

Cairns

Wed 8/12

6:00 am-3:38 pm

3 stops48h 38m

$2,477
Cheapest one-way
Quickest one-way

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Sat 8/15

3:34 pm-11:40 am

2 stops29h 06m

$507

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Sat 8/15

3:34 pm-8:40 am

3 stops50h 06m

$590

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from St. Louis to Cairns

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Cairns according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Cairns (STL to CNS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Cairns

Fastest flight time

32h 44m

Direct flights

None
The fastest flight from St. Louis to Cairns takes 32h 44m
There are no direct flights from St. Louis to Cairns. There are no popular flight routes from St. Louis to Cairns.
Search flight deals

Frequently asked questions about flying from St. Louis to Cairns

  • How far is Lambert-St Louis to Cairns by plane?

    The distance between Lambert-St Louis and Cairns is about 8759.6 mi. Flights usually cover this in 32h 44m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Cairns Airport?

    Prices for flights from Lambert-St Louis Airport to Cairns Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Cairns Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Cairns Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Cairns Airport.

  • What documentation or ID do you need to fly to Cairns Airport?

    The travel and health documents required for your trip to Cairns Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Cairns Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Cairns?

Best airlines flying from St. Louis to Cairns

Compare and see reviews for airlines that fly from St. Louis to Cairns with momondo
Airline
Rating
Free Cancellation
Price
Fiji AirwaysPriceFrom $1,265Free CancellationRating
8.1
240 reviews
Search Fiji Airways flights

Frequently asked questions about flying from St. Louis to Cairns

  • How do I get Price Alerts for flights from St. Louis to Cairns?

    Confirm your travel details to search for the latest offers for flights from St. Louis to Cairns. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from St. Louis to Cairns with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Traveling to a place near Cairns?

Book flights to Cairns if you plan to visit one of these locations
Port Douglas
Mission Beach
Palm Cove
Trinity Beach

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Cairns?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Cairns. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Cairns with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Cairns flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Cairns?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Cairns from St. Louis.

I’m not ready to book a flight from St. Louis to Cairns right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Cairns now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Cairns and let you know when they change.

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