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$1,003+ Cheap flights from Boston (BOS) to Cairns (CNS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CNS
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
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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 January 6, 2026.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$1,658
(Qantas Airways)
Provider with most accurate pricing for Boston Logan Intl-Cairns flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Cairns flights.
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From Boston Logan Intl to Cairns
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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 January 6, 2026.

This Qantas Airways deal was found by Cheapflights users on 1/5. 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 2/288:23 amBOS - CNS
2 stops35h 22mQantas Airways
Wed 3/46:00 amCNS - BOS
2 stops39h 14mQantas Airways
Deal found 1/5$1,658
This Singapore Airlines deal was found by Cheapflights users on 1/4. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/282:16 pmBOS - CNS
3 stops36h 04mSingapore Airlines
Wed 3/46:35 pmCNS - BOS
2 stops44h 23mSingapore Airlines
Deal found 1/4$2,272
This Qantas Airways deal was found by Cheapflights users on 1/6. 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 2/1310:48 amBOS - CNS
2 stops54h 47mQantas Airways
Sun 2/2212:35 pmCNS - BOS
2 stops48h 36mQantas Airways
Deal found 1/6$8,217
This oojo deal was found by Cheapflights users on 1/6. 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.
Fri 2/1310:48 amBOS - CNS
2 stops39h 02mQantas Airways
Sat 2/2111:35 amCNS - BOS
2 stops46h 05mQantas Airways
Deal found 1/6$8,348
This Arangrant deal was found by Cheapflights users on 1/6. 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 Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/1410:10 amBOS - CNS
2 stops33h 50mQantas Airways
Sat 2/2111:45 amCNS - BOS
2 stops33h 29mQantas Airways
Deal found 1/6$10,835
This Qantas Airways deal was found by Cheapflights users on 1/6. 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 2/134:04 pmBOS - CNS
2 stops27h 56mMultiple Airlines
Sat 2/212:50 pmCNS - BOS
3 stops34h 04mMultiple Airlines
Deal found 1/6$10,842
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/144:15 pmBOS - CNS
2 stops50h 40mLufthansa
Sun 2/226:35 pmCNS - BOS
2 stops34h 00mLufthansa
Deal found 1/6$11,079
This oojo deal was found by Cheapflights users on 1/6. 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.
Thu 2/1212:30 amBOS - CNS
2 stops46h 35mCathay Pacific
Sat 2/2111:25 amCNS - BOS
1 stop25h 35mCathay Pacific
Deal found 1/6$11,305
This Kiwi.com deal was found by Cheapflights users on 1/6. 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.
Fri 2/1312:30 amBOS - CNS
2 stops41h 05mMultiple Airlines
Sat 2/2111:25 amCNS - BOS
1 stop25h 35mMultiple Airlines
Deal found 1/6$12,466

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 January 6, 2026.
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

Mon 3/9

9:40 pm-8:30 am

3 stops68h 50m

Cairns

Mon 3/16

3:45 pm-2:55 pm

2 stops37h 10m

$1,579

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Wed 2/18

8:40 pm-8:30 am

3 stops68h 50m

Cairns

Wed 2/25

2:25 pm-2:20 pm

2 stops38h 55m

$1,607

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sat 2/28

10:10 am-10:45 am

2 stops33h 35m

Cairns

Wed 3/4

9:20 am-6:14 am

2 stops35h 54m

$1,658

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sat 2/28

2:16 pm-5:20 pm

3 stops36h 04m

Cairns

Wed 3/4

6:35 pm-11:58 pm

2 stops44h 23m

$2,272

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sat 2/14

4:04 pm-9:55 am

2 stops50h 51m

Cairns

Sat 2/21

11:35 am-5:35 pm

2 stops45h 00m

$9,092

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Fri 6/19

6:00 am-8:40 am

3 stops36h 40m

$1,003

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Fri 6/19

3:00 pm-11:05 am

2 stops30h 05m

$1,030

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Fri 6/19

1:35 pm-4:30 am

1 stop24h 55m

$7,234

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

  • Most accurate provider: When it comes to deals on Boston-Cairns flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Boston-Cairns flight deals on Cheapflights vs. Expedia 90-95% 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 Expedia the most. Expedia 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.

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 33h 35m. 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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