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$668+ 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 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CNS
ago. 25 — sep. 11
lun. 8/25
lun. 9/1
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 agosto 20, 2025.

Round-trip from

$1,635
(Cathay Pacific)

One-way from

$668
(FlightHub)
From Boston Logan Intl to Cairns
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One-way flight 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 agosto 20, 2025.

This Justfly.com deal was found by Cheapflights users on 8/18. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/108:00 amBOS - CNS
2 stops41h 50mQantas Airways
sáb. 1/109:20 amCNS - BOS
2 stops60h 55mQantas Airways
Deal found 8/18$1,794
This Gotogate deal was found by Cheapflights users on 8/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/106:55 pmBOS - CNS
3 stops72h 20mMultiple Airlines
sáb. 1/105:40 pmCNS - BOS
2 stops38h 40mMultiple Airlines
Deal found 8/18$2,155
This oojo deal was found by Cheapflights users on 8/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/2310:27 amBOS - CNS
2 stops33h 33mQantas Airways
dom. 1/45:00 pmCNS - BOS
2 stops40h 54mQantas Airways
Deal found 8/19$2,787
This Gotogate deal was found by Cheapflights users on 8/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/912:30 amBOS - CNS
2 stops43h 15mCathay Pacific
sáb. 1/1012:00 pmCNS - BOS
1 stop25h 00mCathay Pacific
Deal found 8/18$3,072
This Booking.com deal was found by Cheapflights users on 8/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/2212:30 amBOS - CNS
1 stop43h 00mMultiple Airlines
dom. 1/47:50 pmCNS - BOS
2 stops57h 30mMultiple Airlines
Deal found 8/19$3,512

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 agosto 20, 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

sáb. 2/7

12:30 am-10:30 am

1 stop43h 00m

Cairns

jue. 2/12

12:00 pm-10:00 pm

1 stop25h 00m

$1,635

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

dom. 2/8

5:59 pm-2:00 pm

2 stops29h 01m

Cairns

jue. 2/12

6:00 am-9:40 pm

2 stops30h 40m

$1,753

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

dom. 2/8

9:05 pm-11:05 pm

2 stops35h 00m

Cairns

jue. 2/12

5:20 pm-2:20 pm

2 stops60h 00m

$1,756

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

mié. 12/10

8:00 am-4:50 pm

2 stops41h 50m

Cairns

sáb. 1/10

9:20 am-7:15 am

2 stops60h 55m

$1,794

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

mié. 12/10

6:55 pm-10:15 am

3 stops72h 20m

Cairns

sáb. 1/10

5:40 pm-5:20 pm

2 stops38h 40m

$2,155

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

dom. 2/8

1:06 pm-5:30 pm

3 stops37h 24m

Cairns

jue. 2/12

5:35 pm-2:41 pm

2 stops36h 06m

$2,531

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

jue. 11/27

12:15 pm-11:35 am

2 stops32h 20m

$668

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

lun. 12/15

4:28 pm-11:05 pm

2 stops39h 37m

$702

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

mar. 11/25

3:30 pm-4:35 am

3 stops46h 05m

$721

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

lun. 11/24

3:30 pm-4:35 am

3 stops46h 05m

$722

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 17 results
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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 agosto 20, 2025.

One of the essential ways to save on airfare from Boston to Cairns is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 23% 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?

    Cathay Pacific and United Airlines can get you from Boston to Cairns in just under 29h 01m. Your travel time can differ by up to 13h 59m. Airlines will cover a distance of 9642 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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.

  • What is the cheapest month to book a flight from Boston to Cairns?

    Currently, February is the cheapest month in which you can book a flight from Boston to Cairns (average of $1,158). Flying from Boston to Cairns in December is currently the most expensive (average of $1,882). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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