$1,595+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CNS
Nov 3 — Nov 101
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to Cairns with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Cairns
Cheapest
Best
Last-minute
Cheapest flights from St. Louis to CairnsExplore 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 October 4, 2026.
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 October 4, 2026.
This United Airlines deal was found by Cheapflights users on 10/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:00 am -
2 stops38h 00m
Mon 11/236:00 am -
2 stops28h 05m
Deal found 10/2![United Airlines logo]()
$1,595
This Gotogate deal was found by Cheapflights users on 10/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/161:08 pm -
3 stops32h 52m
Mon 11/236:00 am -
3 stops33h 24m
Deal found 10/2![Air Canada logo]()
$1,708
This Ovago deal was found by Cheapflights users on 10/2. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/167:06 pm -
2 stops47h 49m
Mon 11/233:40 pm -
3 stops44h 37m
Deal found 10/2![Qantas Airways logo]()
$1,895
Best flights from St. Louis to CairnsDiscover carefully curated flight deals from St. Louis to Cairns that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 4, 2026.
Discover carefully curated flight deals from St. Louis to Cairns that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 4, 2026.
This United Airlines deal was found by Cheapflights users on 10/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:00 am -
2 stops38h 00m
Mon 11/236:00 am -
2 stops28h 05m
Deal found 10/2![United Airlines logo]()
$1,595
This Qantas Airways deal was found by Cheapflights users on 9/30. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/132:54 pm -
2 stops36h 21m
Wed 2/179:15 am -
2 stops30h 33m
Deal found 9/30![Qantas Airways logo]()
$1,637
This Air Canada deal was found by Cheapflights users on 10/3. 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.
Sat 2/134:05 pm -
3 stops54h 50m
Wed 2/173:45 pm -
3 stops63h 41m
Deal found 10/3![Air Canada logo]()
$1,762
This Ovago deal was found by Cheapflights users on 10/2. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/167:06 pm -
2 stops47h 49m
Mon 11/233:40 pm -
3 stops44h 37m
Deal found 10/2![Qantas Airways logo]()
$1,895
This United Airlines deal was found by Cheapflights users on 10/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/131:08 pm -
3 stops33h 47m
Wed 2/176:00 am -
2 stops27h 51m
Deal found 10/3![United Airlines logo]()
$2,277
Last-minute flights from St. Louis to CairnsDiscover last-minute flight deals from St. Louis to Cairns. Data last updated October 4, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Cairns. Data last updated October 4, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:00 am -
2 stops38h 00m
Mon 11/236:00 am -
2 stops28h 05m
Deal found 10/2![United Airlines logo]()
$1,595
This Gotogate deal was found by Cheapflights users on 10/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/161:08 pm -
3 stops32h 52m
Mon 11/236:00 am -
3 stops33h 24m
Deal found 10/2![Air Canada logo]()
$1,708
This Ovago deal was found by Cheapflights users on 10/2. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/167:06 pm -
2 stops47h 49m
Mon 11/233:40 pm -
3 stops44h 37m
Deal found 10/2![Qantas Airways logo]()
$1,895
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 October 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,527 (United Airlines) |
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 7,457,451 searches. Data last updated October 4, 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
Cheapest round-trip
St. LouisCairns
STL Lambert-St Louis - CNS Cairns
STLCNS
Lambert-St Louis
Mon 11/16
8:00 am-2:00 pm
2 stops38h 00m
Cairns
Mon 11/23
6:00 am-6:05 pm
2 stops28h 05m
$1,595
St. LouisCairns
STL Lambert-St Louis - CNS Cairns
STLCNS
Lambert-St Louis
Sat 2/13
2:54 pm-7:15 pm
2 stops36h 21m
Cairns
Wed 2/17
9:15 am-11:48 pm
2 stops30h 33m
$1,637
St. LouisCairns
STL Lambert-St Louis - CNS Cairns
STLCNS
Lambert-St Louis
Sat 2/13
4:05 pm-2:55 pm
3 stops54h 50m
Cairns
Wed 2/17
3:45 pm-3:26 pm
3 stops63h 41m
$1,762
St. LouisCairns
STL Lambert-St Louis - CNS Cairns
STLCNS
Lambert-St Louis
Mon 11/16
7:06 pm-10:55 am
2 stops47h 49m
Cairns
Mon 11/23
3:40 pm-8:17 pm
3 stops44h 37m
$1,895
Quickest round-trip
St. LouisCairns
STL Lambert-St Louis - CNS Cairns
STLCNS
Lambert-St Louis
Sat 2/13
1:08 pm-2:55 pm
3 stops33h 47m
Cairns
Wed 2/17
6:00 am-5:51 pm
2 stops27h 51m
$2,277
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.
STL-CNS
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Cairns flight routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights