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Cheap flights from Boston to Cairns from $989

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 30/8. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Boston to Cairns

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
22:00 - 23:20BOS  Boston Logan Intl-CNS Cairns
35h 20m2 stops Doha Hamad Intl Brisbane
Multiple Airlines Logo
07:30 - 15:15CNS  Cairns-BOS Boston Logan Intl
45h 45m2 stops Adelaide Doha Hamad Intl
$2,187Multiple Airlines
Mon, 7 Sep - Thu, 17 Sep
Multiple Airlines Logo
22:00 - 23:20BOS  Boston Logan Intl-CNS Cairns
35h 20m2 stops Doha Hamad Intl Brisbane
Multiple Airlines Logo
06:00 - 15:15CNS  Cairns-BOS Boston Logan Intl
47h 15m2 stops Brisbane Doha Hamad Intl
$2,251Multiple Airlines
Mon, 7 Sep - Thu, 17 Sep
Qantas Airways Logo
16:59 - 13:40BOS  Boston Logan Intl-CNS Cairns
30h 41m2 stops Los Angeles Sydney Kingsford Smith
Qantas Airways Logo
06:50 - 21:27CNS  Cairns-BOS Boston Logan Intl
28h 37m2 stops Sydney Kingsford Smith Dallas/Fort Worth
$2,275Qantas Airways
Mon, 7 Sep - Thu, 17 Sep
Multiple Airlines Logo
16:59 - 18:25BOS  Boston Logan Intl-CNS Cairns
35h 26m2 stops Los Angeles Sydney Kingsford Smith
Multiple Airlines Logo
19:10 - 19:52CNS  Cairns-BOS Boston Logan Intl
38h 42m2 stops Sydney Kingsford Smith Dallas/Fort Worth
$2,346Multiple Airlines
Wed, 2 Sep - Tue, 8 Sep
Multiple Airlines Logo
10:40 - 04:30BOS  Boston Logan Intl-CNS Cairns
27h 50m2 stops Montreal Pierre Elliott Trudeau Intl Tokyo Narita
Multiple Airlines Logo
19:10 - 11:51CNS  Cairns-BOS Boston Logan Intl
54h 41m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl
$2,365Multiple Airlines
Mon, 7 Sep - Thu, 17 Sep
Multiple Airlines Logo
10:40 - 04:30BOS  Boston Logan Intl-CNS Cairns
27h 50m2 stops Montreal Pierre Elliott Trudeau Intl Tokyo Narita
Multiple Airlines Logo
19:10 - 11:51CNS  Cairns-BOS Boston Logan Intl
54h 41m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl
$2,366Multiple Airlines
Mon, 7 Sep - Thu, 17 Sep
Multiple Airlines Logo
16:59 - 13:40BOS  Boston Logan Intl-CNS Cairns
30h 41m2 stops Los Angeles Sydney Kingsford Smith
Multiple Airlines Logo
19:10 - 22:29CNS  Cairns-BOS Boston Logan Intl
41h 19m2 stops Sydney Kingsford Smith Dallas/Fort Worth
$2,379Multiple Airlines
Wed, 2 Sep - Tue, 8 Sep
Multiple Airlines Logo
18:50 - 04:30BOS  Boston Logan Intl-CNS Cairns
43h 40m2 stops Montreal Pierre Elliott Trudeau Intl Tokyo Narita
Multiple Airlines Logo
19:15 - 11:51CNS  Cairns-BOS Boston Logan Intl
54h 36m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl
$2,400Multiple Airlines
Mon, 7 Sep - Thu, 17 Sep
Multiple Airlines Logo
10:40 - 04:30BOS  Boston Logan Intl-CNS Cairns
27h 50m2 stops Montreal Pierre Elliott Trudeau Intl Tokyo Narita
Multiple Airlines Logo
06:00 - 21:26CNS  Cairns-BOS Boston Logan Intl
29h 26m3 stops Brisbane Vancouver Intl Montreal Pierre Elliott Trudeau Intl
$2,801Multiple Airlines
Wed, 2 Sep - Tue, 8 Sep
Air Canada Logo
15:35 - 11:10BOS  Boston Logan Intl-CNS Cairns
29h 35m3 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl Brisbane
Air Canada Logo
06:00 - 21:26CNS  Cairns-BOS Boston Logan Intl
29h 26m3 stops Brisbane Vancouver Intl Montreal Pierre Elliott Trudeau Intl
$3,234Air Canada
Wed, 2 Sep - Tue, 8 Sep

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Qantas Airways flights from Boston to Cairns

Our best Qantas Airways deals on Boston to Cairns flight tickets
Qantas Airways
7 Sept
BOS16:59Boston Logan Intl
30h 41m
2 stops
CNS13:40Cairns
17 Sept
CNS06:50Cairns
28h 37m
2 stops
BOS21:27Boston Logan Intl
$2,275
Qantas Airways
13 Aug
BOS14:32Boston Logan Intl
33h 08m
2 stops
CNS13:40Cairns
18 Aug
CNS06:50Cairns
54h 54m
2 stops
BOS23:44Boston Logan Intl
$2,909
Qantas Airways
2 Sept
BOS10:30Boston Logan Intl
34h 05m
2 stops
CNS10:35Cairns
8 Sept
CNS13:55Cairns
47h 33m
3 stops
BOS23:28Boston Logan Intl
$3,683

Air Canada flights from Boston to Cairns

Our best Air Canada deals on Boston to Cairns flight tickets
Air Canada
2 Sept
BOS15:35Boston Logan Intl
29h 35m
3 stops
CNS11:10Cairns
8 Sept
CNS06:00Cairns
29h 26m
3 stops
BOS21:26Boston Logan Intl
$3,234
Air Canada
7 Sept
BOS10:50Boston Logan Intl
39h 05m
3 stops
CNS15:55Cairns
17 Sept
CNS19:15Cairns
41h 25m
3 stops
BOS22:40Boston Logan Intl
$3,409

momondo Fare Finder

 
Customise 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 78,305 searches. Data last updated 7 August 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 return flight

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Mon 7/9

22:00-23:20

2 stops35h 20m

Cairns

Thu 17/9

07:30-15:15

2 stops45h 45m

$2,187

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Mon 7/9

22:00-23:20

2 stops35h 20m

Cairns

Thu 17/9

06:00-15:15

2 stops47h 15m

$2,251

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Mon 7/9

16:59-13:40

2 stops30h 41m

Cairns

Thu 17/9

06:50-21:27

2 stops28h 37m

$2,275

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Wed 2/9

16:59-18:25

2 stops35h 26m

Cairns

Tue 8/9

19:10-19:52

2 stops38h 42m

$2,346

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Mon 7/9

10:40-04:30

2 stops27h 50m

Cairns

Thu 17/9

19:10-11:51

3 stops54h 41m

$2,365

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Mon 7/9

10:40-04:30

2 stops27h 50m

Cairns

Thu 17/9

19:10-11:51

3 stops54h 41m

$2,366

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Wed 2/9

16:59-13:40

2 stops30h 41m

Cairns

Tue 8/9

19:10-22:29

2 stops41h 19m

$2,379

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Mon 7/9

18:50-04:30

2 stops43h 40m

Cairns

Thu 17/9

19:15-11:51

3 stops54h 36m

$2,400
Fastest return journey

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Wed 2/9

10:40-04:30

2 stops27h 50m

Cairns

Tue 8/9

06:00-21:26

3 stops29h 26m

$2,801

BostonCairns

BOS Boston Logan Intl - CNS Cairns

BOSCNS

Boston Logan Intl

Wed 2/9

15:35-11:10

3 stops29h 35m

Cairns

Tue 8/9

06:00-21:26

3 stops29h 26m

$3,234

Flights are sorted by cheapest return 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?

American Airlines, United Airlines, and Qantas Airways are the most popular carriers 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 return 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

27h 50m

Direct flights

None
The fastest flight from Boston to Cairns takes 27h 50m
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?

    Boston Logan Intl and Cairns are 15516.0 km apart from one another. Flights usually cover this in 27h 50m, depending on flying conditions and air traffic around both airports.

  • 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 updated daily.

  • 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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify 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 travel and health documents you'll need for your trip to Cairns Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Cairns Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Cairns?

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

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Boston to Cairns . Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Boston to Cairns on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Boston and Cairns by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of Boston to Cairns flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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