$739+ Cheap flights from Boston (BOS) 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CNS
Oct 23 — Oct 301
Round-trip
1 adult, Economy
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Find cheap flights from Boston 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 Boston to Cairns
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Best
Last-minute
One-way
Cheapest flights from Boston to CairnsExplore the most affordable flight options available from Boston to Cairns. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.
Explore the most affordable flight options available from Boston to Cairns. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.
This United deal was found by Cheapflights users on 9/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/82:36 pm -
3 stops32h 24m
Tue 12/156:00 am -
2 stops25h 55m
Deal found 9/21![Multiple Airlines logo]()
$1,441
This American Airlines deal was found by Cheapflights users on 9/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/24:35 pm -
2 stops29h 20m
Tue 10/201:55 pm -
2 stops32h 22m
Deal found 9/18![American Airlines logo]()
$1,558
This oojo deal was found by Cheapflights users on 9/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:45 pm -
2 stops50h 05m
Sat 11/1412:35 pm -
2 stops42h 54m
Deal found 9/22![Qantas Airways logo]()
$1,674
This United Airlines deal was found by Cheapflights users on 9/18. 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.
Fri 10/26:40 pm -
2 stops34h 30m
Tue 10/206:00 am -
3 stops31h 59m
Deal found 9/18![United Airlines logo]()
$1,679
This United Airlines deal was found by Cheapflights users on 9/22. 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 11/71:51 pm -
2 stops33h 09m
Sat 11/146:00 am -
3 stops32h 59m
Deal found 9/22![United Airlines logo]()
$1,726
This United Airlines deal was found by Cheapflights users on 9/19. 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.
Sun 11/85:30 am -
3 stops42h 25m
Wed 11/116:00 am -
2 stops28h 19m
Deal found 9/19![United Airlines logo]()
$2,010
This Emirates deal was found by Cheapflights users on 9/21. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/810:10 pm -
2 stops44h 25m
Wed 11/113:40 pm -
2 stops61h 15m
Deal found 9/21![Emirates logo]()
$2,121
This Japan Airlines deal was found by Cheapflights users on 9/18. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:00 pm -
1 stop25h 30m
Tue 10/2011:35 am -
2 stops44h 35m
Deal found 9/18![Multiple Airlines logo]()
$7,015
Best flights from Boston to CairnsDiscover carefully curated flight deals from Boston to Cairns that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
Discover carefully curated flight deals from Boston to Cairns that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
This United deal was found by Cheapflights users on 9/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/82:36 pm -
3 stops32h 24m
Tue 12/156:00 am -
2 stops25h 55m
Deal found 9/21![Multiple Airlines logo]()
$1,441
This oojo deal was found by Cheapflights users on 9/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:45 pm -
2 stops50h 05m
Sat 11/1412:35 pm -
2 stops42h 54m
Deal found 9/22![Qantas Airways logo]()
$1,674
This United Airlines deal was found by Cheapflights users on 9/22. 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 11/71:51 pm -
2 stops33h 09m
Sat 11/146:00 am -
3 stops32h 59m
Deal found 9/22![United Airlines logo]()
$1,726
This United Airlines deal was found by Cheapflights users on 9/18. 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.
Sun 11/81:32 pm -
3 stops34h 23m
Wed 11/116:00 am -
3 stops32h 59m
Deal found 9/18![United Airlines logo]()
$2,010
Last-minute flights from Boston to CairnsDiscover last-minute flight deals from Boston to Cairns. Data last updated September 23, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Cairns. Data last updated September 23, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/24:35 pm -
2 stops29h 20m
Tue 10/201:55 pm -
2 stops32h 22m
Deal found 9/18![American Airlines logo]()
$1,558
This United Airlines deal was found by Cheapflights users on 9/18. 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.
Fri 10/26:40 pm -
2 stops34h 30m
Tue 10/206:00 am -
3 stops31h 59m
Deal found 9/18![United Airlines logo]()
$1,679
This Japan Airlines deal was found by Cheapflights users on 9/18. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:00 pm -
1 stop25h 30m
Tue 10/2011:35 am -
2 stops44h 35m
Deal found 9/18![Multiple Airlines logo]()
$7,015
One-way flights from Boston to CairnsSearch for one-way flight options from Boston to Cairns. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
Search for one-way flight options from Boston to Cairns. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
This American Airlines deal was found by Cheapflights users on 9/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:29 pm -
2 stops33h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![American Airlines logo]()
$739
This United deal was found by Cheapflights users on 9/22. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/265:55 pm -
2 stops38h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Multiple Airlines logo]()
$756
This United Airlines deal was found by Cheapflights users on 9/22. 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 1/255:55 pm -
2 stops29h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![United Airlines logo]()
$761
This United Airlines deal was found by Cheapflights users on 9/22. 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.
Sun 1/245:55 pm -
2 stops30h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![United Airlines logo]()
$766
This Kiwi.com deal was found by Cheapflights users on 9/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/287:00 am -
3 stops40h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Multiple Airlines logo]()
$776
This Kiwi.com deal was found by Cheapflights users on 9/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:13 am -
3 stops43h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Multiple Airlines logo]()
$806
This United Airlines deal was found by Cheapflights users on 9/22. 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.
Thu 1/287:30 am -
2 stops39h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![United Airlines logo]()
$821
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/68:00 pm -
3 stops35h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Multiple Airlines logo]()
$946
Find flight deals from Boston to Cairns
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) 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 September 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,441 (United) |
One-way from | $739 (American Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from Boston 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 September 23, 2026.
Use the filters below to find and compare flights from Boston to Cairns that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Tue 1/26
5:55 pm-11:05 pm
2 stops38h 10m
Cairns
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$756
Quickest round-trip
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Mon 1/25
5:55 pm-2:00 pm
2 stops29h 05m
Cairns
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$761
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Wed 1/27
1:55 pm-2:00 pm
2 stops33h 05m
Cairns
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$761
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Sun 1/24
5:55 pm-2:55 pm
2 stops30h 00m
Cairns
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$766
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Thu 1/28
5:45 am-2:55 pm
3 stops42h 10m
Cairns
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$826
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Mon 10/12
11:00 am-8:15 pm
2 stops43h 15m
Cairns
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$1,010
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Tue 12/8
2:36 pm-2:00 pm
3 stops32h 24m
Cairns
Tue 12/15
6:00 am-4:55 pm
2 stops25h 55m
$1,441
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Sat 11/7
6:45 pm-11:50 am
2 stops50h 05m
Cairns
Sat 11/14
12:35 pm-4:29 pm
2 stops42h 54m
$1,674
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Sat 11/7
1:51 pm-2:00 pm
2 stops33h 09m
Cairns
Sat 11/14
6:00 am-11:59 pm
3 stops32h 59m
$1,726
BostonCairns
BOS Boston Logan Intl - CNS Cairns
BOSCNS
Boston Logan Intl
Sun 11/8
1:32 pm-2:55 pm
3 stops34h 23m
Cairns
Wed 11/11
6:00 am-11:59 pm
3 stops32h 59m
$2,010
Sorted by cheapest first
Compare providers for flights from Boston to Cairns
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Cairns in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Boston-Cairns flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Cairns flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Cairns flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boston-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 Boston-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 Boston to Cairns
Have a flexible travel schedule? Discover the best time to fly to Cairns from Boston with our price prediction graph.
BOS-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 Boston to Cairns. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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