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Cheap flights from St. Louis to Cairns from $1,654

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Cairns departing on 9/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from St. Louis to Cairns

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:30 am - 10:20 pm
STL
-
CNS
48h 50m
2 stops
Multiple Airlines Logo
6:50 am - 11:30 pm
CNS
-
STL
31h 40m
2 stops
$1,654Multiple Airlines
Fri, Sep 11 - Fri, Sep 18
Multiple Airlines Logo
2:40 pm - 5:35 am
STL
-
CNS
47h 55m
2 stops
Multiple Airlines Logo
7:15 pm - 8:20 pm
CNS
-
STL
40h 05m
3 stops
$1,656Multiple Airlines
Fri, Sep 11 - Fri, Sep 18
American Airlines Logo
10:21 am - 11:05 am
STL
-
CNS
32h 44m
2 stops
American Airlines Logo
6:00 am - 7:27 pm
CNS
-
STL
29h 27m
2 stops
$1,723American Airlines
Thu, Nov 19 - Sat, Dec 12
Qantas Airways Logo
7:05 pm - 2:55 pm
STL
-
CNS
27h 50m
2 stops
Qantas Airways Logo
9:15 am - 3:27 pm
CNS
-
STL
46h 12m
2 stops
$1,740Qantas Airways
Wed, Nov 18 - Sat, Dec 12
Air Canada Logo
1:36 pm - 11:10 am
STL
-
CNS
30h 34m
3 stops
Air Canada Logo
7:15 pm - 8:20 pm
CNS
-
STL
40h 05m
3 stops
$1,751Air Canada
Fri, Sep 11 - Fri, Sep 18
Qantas Airways Logo
11:41 am - 10:40 am
STL
-
CNS
30h 59m
2 stops
Qantas Airways Logo
1:50 pm - 4:14 pm
CNS
-
STL
42h 24m
2 stops
$1,861Qantas Airways
Tue, Jan 5 - Tue, Jan 26
Multiple Airlines Logo
6:44 pm - 10:40 am
STL
-
CNS
23h 56m
2 stops
Multiple Airlines Logo
6:00 am - 7:29 pm
CNS
-
STL
29h 29m
3 stops
$1,878Multiple Airlines
Tue, Jan 5 - Tue, Jan 26
Qantas Airways Logo
2:28 pm - 11:05 am
STL
-
CNS
28h 37m
3 stops
Qantas Airways Logo
6:00 am - 9:08 pm
CNS
-
STL
31h 08m
3 stops
$1,963Qantas Airways
Wed, Nov 18 - Sat, Dec 12
American Airlines Logo
12:58 pm - 11:05 am
STL
-
CNS
30h 07m
2 stops
American Airlines Logo
6:00 am - 11:57 pm
CNS
-
STL
33h 57m
2 stops
$2,000American Airlines
Thu, Nov 19 - Sat, Dec 12
United Airlines Logo
8:00 am - 2:00 pm
STL
-
CNS
38h 00m
2 stops
United Airlines Logo
6:00 am - 5:53 pm
CNS
-
STL
27h 53m
2 stops
$2,006United Airlines
Wed, Nov 18 - Sat, Dec 12

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American Airlines flights from St. Louis to Cairns

Our best American Airlines deals on St. Louis to Cairns flight tickets
American Airlines
Nov 19
STL10:21 amLambert-St Louis
32h 44m
2 stops
CNS11:05 amCairns
Dec 12
CNS6:00 amCairns
29h 27m
2 stops
STL7:27 pmLambert-St Louis
$1,723
American Airlines
Nov 19
STL12:58 pmLambert-St Louis
30h 07m
2 stops
CNS11:05 amCairns
Dec 12
CNS6:00 amCairns
33h 57m
2 stops
STL11:57 pmLambert-St Louis
$2,000

Qantas Airways flights from St. Louis to Cairns

Our best Qantas Airways deals on St. Louis to Cairns flight tickets
Qantas Airways
Nov 18
STL7:05 pmLambert-St Louis
27h 50m
2 stops
CNS2:55 pmCairns
Dec 12
CNS9:15 amCairns
46h 12m
2 stops
STL3:27 pmLambert-St Louis
$1,740
Qantas Airways
Jan 5
STL11:41 amLambert-St Louis
30h 59m
2 stops
CNS10:40 amCairns
Jan 26
CNS1:50 pmCairns
42h 24m
2 stops
STL4:14 pmLambert-St Louis
$1,861
Qantas Airways
Nov 18
STL2:28 pmLambert-St Louis
28h 37m
3 stops
CNS11:05 amCairns
Dec 12
CNS6:00 amCairns
31h 08m
3 stops
STL9:08 pmLambert-St Louis
$1,963

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 July 30, 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

Fri 9/11

6:30 am-10:20 pm

2 stops48h 50m

Cairns

Fri 9/18

6:50 am-11:30 pm

2 stops31h 40m

$1,654

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Fri 9/11

2:40 pm-5:35 am

2 stops47h 55m

Cairns

Fri 9/18

7:15 pm-8:20 pm

3 stops40h 05m

$1,656

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

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

Fri 9/11

1:36 pm-11:10 am

3 stops30h 34m

Cairns

Fri 9/18

7:15 pm-8:20 pm

3 stops40h 05m

$1,751

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Tue 1/5

11:41 am-10:40 am

2 stops30h 59m

Cairns

Tue 1/26

1:50 pm-4:14 pm

2 stops42h 24m

$1,861
Quickest round-trip

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Tue 1/5

6:44 pm-10:40 am

2 stops23h 56m

Cairns

Tue 1/26

6:00 am-7:29 pm

3 stops29h 29m

$1,878

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Wed 11/18

2:28 pm-11:05 am

3 stops28h 37m

Cairns

Sat 12/12

6:00 am-9:08 pm

3 stops31h 08m

$1,963

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Thu 11/19

12:58 pm-11:05 am

2 stops30h 07m

Cairns

Sat 12/12

6:00 am-11:57 pm

2 stops33h 57m

$2,000

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Wed 11/18

8:00 am-2:00 pm

2 stops38h 00m

Cairns

Sat 12/12

6:00 am-5:53 pm

2 stops27h 53m

$2,006

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

30h 59m

Direct flights

None
The fastest flight from St. Louis to Cairns takes 30h 59m
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 30h 59m, 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 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.

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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