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$1,478+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CNS
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Find flight deals from Boston to Cairns

Cheapest flights from Boston to Cairns
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 October 27, 2025.

This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Wed 11/122:30 pmBOS - CNS
2 stops41h 35mQantas Airways
Thu 11/202:50 pmCNS - BOS
2 stops44h 40mQantas Airways
Deal found 10/27$1,489
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Sun 11/23:43 pmBOS - CNS
2 stops40h 22mQantas Airways
Wed 11/123:35 pmCNS - BOS
2 stops29h 43mQantas Airways
Deal found 10/27$1,503
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Fri 11/283:45 pmBOS - CNS
2 stops40h 20mQantas Airways
Mon 12/85:35 pmCNS - BOS
2 stops36h 20mQantas Airways
Deal found 10/27$1,510
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Wed 11/54:01 pmBOS - CNS
2 stops40h 04mQantas Airways
Thu 11/135:35 pmCNS - BOS
2 stops62h 20mQantas Airways
Deal found 10/27$1,515
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Tue 11/44:01 pmBOS - CNS
2 stops40h 04mQantas Airways
Thu 11/135:35 pmCNS - BOS
2 stops62h 20mQantas Airways
Deal found 10/27$1,519
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Mon 12/15:45 pmBOS - CNS
2 stops29h 05mQantas Airways
Wed 12/103:35 pmCNS - BOS
2 stops30h 39mQantas Airways
Deal found 10/27$1,521
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Mon 12/15:45 pmBOS - CNS
2 stops29h 05mQantas Airways
Tue 12/95:35 pmCNS - BOS
2 stops36h 18mQantas Airways
Deal found 10/27$1,527
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Wed 11/122:30 pmBOS - CNS
2 stops41h 35mQantas Airways
Sat 11/223:30 pmCNS - BOS
2 stops38h 25mQantas Airways
Deal found 10/27$1,528
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Sun 11/93:43 pmBOS - CNS
2 stops40h 22mQantas Airways
Mon 11/175:35 pmCNS - BOS
2 stops36h 19mQantas Airways
Deal found 10/27$1,532
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Mon 11/175:45 pmBOS - CNS
2 stops32h 45mQantas Airways
Wed 11/263:35 pmCNS - BOS
2 stops44h 43mQantas Airways
Deal found 10/27$1,536
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Tue 11/184:01 pmBOS - CNS
2 stops28h 19mQantas Airways
Wed 11/263:35 pmCNS - BOS
2 stops44h 43mQantas Airways
Deal found 10/27$1,537
This Qantas Airways deal was found by Cheapflights users on 10/27. 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.
Wed 12/36:25 pmBOS - CNS
2 stops28h 25mQantas Airways
Thu 12/1111:35 amCNS - BOS
2 stops49h 44mQantas Airways
Deal found 10/27$1,543

Cheap 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 October 27, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,366
(KAYAK)
Provider with most accurate pricing for Boston Logan Intl-Cairns flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Cairns flights.
Search Deals
From Boston Logan Intl to Cairns
Search Deals

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 2,558,603 searches. Data last updated October 27, 2025.
Use the filters below to find and compare flights from Boston to Cairns that are best for you.

Fly from

Boston

Fly to

Cairns

Route

Depart

Return

Price

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Wed 1/21

8:00 am-11:00 am

2 stops36h 00m

Cairns

Thu 2/5

5:35 pm-6:24 am

2 stops51h 49m

$1,478

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Wed 1/21

11:00 am-2:05 pm

2 stops36h 05m

Cairns

Fri 1/30

3:35 pm-6:24 am

2 stops29h 49m

$1,478

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Wed 1/21

8:00 am-11:00 am

2 stops36h 00m

Cairns

Sat 1/31

9:20 am-4:35 pm

2 stops46h 15m

$1,484

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Wed 11/12

2:30 pm-11:05 pm

2 stops41h 35m

Cairns

Thu 11/20

2:50 pm-8:30 pm

2 stops44h 40m

$1,489

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sat 1/17

12:12 pm-10:45 am

2 stops31h 33m

Cairns

Fri 1/30

9:20 am-6:24 am

2 stops36h 04m

$1,495

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sun 1/18

12:12 pm-10:45 am

2 stops31h 33m

Cairns

Wed 2/4

9:20 am-6:24 am

2 stops36h 04m

$1,495

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Tue 1/20

12:12 pm-10:45 am

2 stops31h 33m

Cairns

Tue 2/3

5:35 pm-6:24 am

2 stops51h 49m

$1,495

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Thu 1/22

5:25 pm-4:50 pm

2 stops32h 25m

Cairns

Fri 1/30

3:35 pm-6:24 am

2 stops29h 49m

$1,495

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sat 1/17

9:45 am-10:45 am

2 stops34h 00m

Cairns

Thu 2/5

5:35 pm-6:24 am

2 stops51h 49m

$1,495

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Thu 1/22

9:45 am-4:50 pm

2 stops40h 05m

Cairns

Sun 2/1

6:00 am-9:00 pm

2 stops30h 00m

$1,499

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 12 results
1
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  • Most accurate provider: When it comes to deals on Boston-Cairns flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Boston-Cairns flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.
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.

Cheapflights Insights

Everything you need to know about your flight from Boston to Cairns

What is the cheapest time of day to fly from BOS to CNS?

Find hourly flight availability from Boston to Cairns. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 27, 2025.

One of the essential ways to save on airfare from Boston to Cairns is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 28% on airfare.

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.

  • How long is the flight from Boston to Cairns?

    Qantas Airways can get you from Boston to Cairns in just under 36h. Your travel time can differ by up to . Airlines will cover a distance of 9642 mi.

  • Can I find deals for flights from Boston to Cairns that include hotel bookings?

    Yes. In addition to deals on Boston to Cairns flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Cairns?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Cairns.

  • Can I find deals for business class flights from Boston to Cairns?

    Yes. Cheapflights offers flight deals from Boston to Cairns by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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