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Cheap flights from Boston to Cairns from $867

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Cairns departing on 7/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Boston to Cairns

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:00 pm - 9:50 am
BOS
-
CNS
45h 50m
2 stops
Multiple Airlines Logo
1:40 pm - 3:15 pm
CNS
-
BOS
63h 35m
2 stops
$1,688Multiple Airlines
Mon, Sep 7 - Thu, Sep 17
Multiple Airlines Logo
10:00 pm - 9:50 am
BOS
-
CNS
45h 50m
2 stops
Multiple Airlines Logo
9:00 pm - 3:15 pm
CNS
-
BOS
56h 15m
2 stops
$1,689Multiple Airlines
Mon, Sep 7 - Thu, Sep 17
Multiple Airlines Logo
3:00 pm - 9:20 am
BOS
-
CNS
52h 20m
2 stops
Multiple Airlines Logo
7:10 pm - 8:53 pm
CNS
-
BOS
39h 43m
2 stops
$1,794Multiple Airlines
Sun, Jun 14 - Sun, Jun 21
Multiple Airlines Logo
10:00 pm - 9:50 am
BOS
-
CNS
45h 50m
2 stops
Multiple Airlines Logo
12:10 pm - 3:15 pm
CNS
-
BOS
41h 05m
2 stops
$1,799Multiple Airlines
Mon, Sep 7 - Thu, Sep 17
Multiple Airlines Logo
10:00 pm - 5:30 am
BOS
-
CNS
41h 30m
2 stops
Multiple Airlines Logo
7:00 pm - 3:15 pm
CNS
-
BOS
34h 15m
2 stops
$1,877Multiple Airlines
Wed, Jul 1 - Mon, Jul 6
American Airlines Logo
4:29 pm - 12:55 pm
BOS
-
CNS
30h 26m
2 stops
American Airlines Logo
3:45 pm - 8:35 am
CNS
-
BOS
30h 50m
2 stops
$1,911American Airlines
Tue, Jun 30 - Mon, Jul 6
United Airlines Logo
6:11 pm - 8:20 pm
BOS
-
CNS
36h 09m
2 stops
United Airlines Logo
6:00 am - 11:54 pm
CNS
-
BOS
31h 54m
3 stops
$2,004United Airlines
Sat, Sep 19 - Wed, Sep 23
United Airlines Logo
2:03 pm - 8:20 pm
BOS
-
CNS
40h 17m
2 stops
United Airlines Logo
6:00 am - 11:54 pm
CNS
-
BOS
31h 54m
3 stops
$2,005United Airlines
Sat, Sep 19 - Wed, Sep 23
Multiple Airlines Logo
4:29 pm - 10:35 am
BOS
-
CNS
28h 06m
2 stops
Multiple Airlines Logo
3:35 pm - 10:57 pm
CNS
-
BOS
45h 22m
3 stops
$2,071Multiple Airlines
Sun, Jun 14 - Sun, Jun 21
Qantas Airways Logo
11:53 am - 1:40 pm
BOS
-
CNS
35h 47m
3 stops
Qantas Airways Logo
6:20 pm - 4:31 pm
CNS
-
BOS
36h 11m
2 stops
$2,081Qantas Airways
Mon, Sep 7 - Thu, Sep 17

Air Canada flights from Boston to Cairns

Our best Air Canada deals on Boston to Cairns flight tickets
Air Canada
Jul 1
BOS10:40 amBoston Logan Intl
34h 30m
3 stops
CNS11:10 amCairns
Jul 6
CNS7:15 pmCairns
41h 23m
3 stops
BOS10:38 pmBoston Logan Intl
$2,620
Air Canada
Sep 19
BOS10:50 amBoston Logan Intl
39h 05m
3 stops
CNS3:55 pmCairns
Sep 23
CNS7:15 pmCairns
58h 55m
3 stops
BOS4:10 pmBoston Logan Intl
$2,673
Air Canada
Sep 19
BOS10:50 amBoston Logan Intl
39h 05m
3 stops
CNS3:55 pmCairns
Sep 23
CNS7:15 pmCairns
41h 25m
3 stops
BOS10:40 pmBoston Logan Intl
$2,791

Qantas Airways flights from Boston to Cairns

Our best Qantas Airways deals on Boston to Cairns flight tickets
Qantas Airways
Sep 7
BOS11:53 amBoston Logan Intl
35h 47m
3 stops
CNS1:40 pmCairns
Sep 17
CNS6:20 pmCairns
36h 11m
2 stops
BOS4:31 pmBoston Logan Intl
$2,081
Qantas Airways
Sep 7
BOS11:53 amBoston Logan Intl
35h 47m
3 stops
CNS1:40 pmCairns
Sep 17
CNS6:50 amCairns
51h 41m
2 stops
BOS8:31 pmBoston Logan Intl
$2,083
Qantas Airways
Sep 7
BOS11:53 amBoston Logan Intl
35h 47m
3 stops
CNS1:40 pmCairns
Sep 17
CNS6:50 amCairns
51h 41m
2 stops
BOS8:31 pmBoston Logan Intl
$2,126

momondo 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, momondo users made 832,500 searches. Data last updated May 3, 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

Price

Cheapest round-trip

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Mon 9/7

10:00 pm-9:50 am

2 stops45h 50m

Cairns

Thu 9/17

1:40 pm-3:15 pm

2 stops63h 35m

$1,688

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Mon 9/7

10:00 pm-9:50 am

2 stops45h 50m

Cairns

Thu 9/17

9:00 pm-3:15 pm

2 stops56h 15m

$1,689

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sun 6/14

3:00 pm-9:20 am

2 stops52h 20m

Cairns

Sun 6/21

7:10 pm-8:53 pm

2 stops39h 43m

$1,794

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Mon 9/7

10:00 pm-9:50 am

2 stops45h 50m

Cairns

Thu 9/17

12:10 pm-3:15 pm

2 stops41h 05m

$1,799

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Wed 7/1

10:00 pm-5:30 am

2 stops41h 30m

Cairns

Mon 7/6

7:00 pm-3:15 pm

2 stops34h 15m

$1,877
Quickest round-trip

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Tue 6/30

4:29 pm-12:55 pm

2 stops30h 26m

Cairns

Mon 7/6

3:45 pm-8:35 am

2 stops30h 50m

$1,911

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sat 9/19

6:11 pm-8:20 pm

2 stops36h 09m

Cairns

Wed 9/23

6:00 am-11:54 pm

3 stops31h 54m

$2,004

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sat 9/19

2:03 pm-8:20 pm

2 stops40h 17m

Cairns

Wed 9/23

6:00 am-11:54 pm

3 stops31h 54m

$2,005

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Sun 6/14

4:29 pm-10:35 am

2 stops28h 06m

Cairns

Sun 6/21

3:35 pm-10:57 pm

3 stops45h 22m

$2,071

BostonCairns

BOS - CNS

BOSCNS

Boston Logan Intl

Mon 9/7

11:53 am-1:40 pm

3 stops35h 47m

Cairns

Thu 9/17

6:20 pm-4:31 pm

2 stops36h 11m

$2,081

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Cairns from

How to get the cheapest flight ticket from Boston to Cairns

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Boston Logan Intl to Cairns?

United Airlines is the most popular carrier operating from Boston Logan Intl to Cairns

When to book flights from Boston to Cairns

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Cairns according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Cairns (BOS to CNS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Cairns

Fastest flight time

40h 55m

Direct flights

None
The fastest flight from Boston to Cairns takes 40h 55m
There are no direct flights from Boston to Cairns. There are no popular flight routes from Boston to Cairns.
Search flight deals

Frequently asked questions about flying from Boston to Cairns

  • How far is Boston Logan Intl to Cairns by plane?

    There are 9641.2 mi between Boston Logan Intl and Cairns. 40h 55m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Cairns Airport?

    Prices for flights from Boston Logan Intl Airport to Cairns Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Boston Logan Intl Airport to Cairns Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Boston Logan Intl Airport to Cairns Airport.

  • What documentation or ID do you need to fly to Cairns Airport?

    The necessary travel and health documents for your Cairns Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Cairns?

Book flights to Cairns if you plan to visit one of these locations
Port Douglas
Mission Beach
Palm Cove
Trinity Beach

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Cairns?

It is quick and easy to find Boston to Cairns flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Cairns that suits you.

Can I find flights from Boston to Cairns with flexible booking policies on momondo?

momondo does allow users to show only those flights to Cairns from Boston which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Boston to Cairns?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Boston to Cairns.

I’m not ready to book a flight from Boston to Cairns right now. Can momondo alert me if prices change?

Price alerts on flights to Cairns from Boston are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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