Cheap flights from Boise to Sydney from $1,704

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Boise to Sydney departing on 20/5. 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

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Cheap return flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
19:33 - 07:05
BOI
-
SYD
19h 32m
1 stop
Alaska Airlines Logo
09:10 - 22:58
SYD
-
BOI
29h 48m
1 stop
$1,704Alaska Airlines
Wed, 20 May - Tue, 2 Jun
Alaska Airlines Logo
19:33 - 07:05
BOI
-
SYD
19h 32m
1 stop
Alaska Airlines Logo
09:10 - 22:58
SYD
-
BOI
29h 48m
1 stop
$1,774Alaska Airlines
Sat, 23 May - Tue, 2 Jun
Multiple Airlines Logo
18:51 - 07:05
BOI
-
SYD
20h 14m
1 stop
Multiple Airlines Logo
17:50 - 22:45
SYD
-
BOI
20h 55m
1 stop
$1,799Multiple Airlines
Wed, 1 Jul - Wed, 8 Jul
Multiple Airlines Logo
18:47 - 07:30
BOI
-
SYD
20h 43m
1 stop
Multiple Airlines Logo
10:10 - 13:44
SYD
-
BOI
20h 34m
1 stop
$1,800Multiple Airlines
Wed, 30 Sep - Mon, 5 Oct
Alaska Airlines Logo
14:30 - 07:30
BOI
-
SYD
25h 00m
2 stops
Alaska Airlines Logo
18:50 - 08:07
SYD
-
BOI
30h 17m
2 stops
$1,810Alaska Airlines
Wed, 30 Sep - Mon, 5 Oct
Multiple Airlines Logo
19:14 - 07:30
BOI
-
SYD
20h 16m
1 stop
Multiple Airlines Logo
09:10 - 12:34
SYD
-
BOI
19h 24m
1 stop
$1,814Multiple Airlines
Mon, 4 May - Mon, 11 May
Alaska Airlines Logo
18:51 - 07:05
BOI
-
SYD
20h 14m
1 stop
Alaska Airlines Logo
09:10 - 22:45
SYD
-
BOI
29h 35m
1 stop
$1,816Alaska Airlines
Fri, 3 Jul - Sat, 11 Jul
Alaska Airlines Logo
08:03 - 07:05
BOI
-
SYD
31h 02m
1 stop
Alaska Airlines Logo
09:10 - 22:45
SYD
-
BOI
29h 35m
1 stop
$1,827Alaska Airlines
Sun, 28 Jun - Wed, 8 Jul
Multiple Airlines Logo
19:14 - 11:50
BOI
-
SYD
24h 36m
2 stops
Multiple Airlines Logo
17:50 - 12:34
SYD
-
BOI
34h 44m
1 stop
$1,828Multiple Airlines
Mon, 4 May - Mon, 11 May
American Airlines Logo
16:05 - 06:55
BOI
-
SYD
22h 50m
1 stop
American Airlines Logo
12:00 - 22:29
SYD
-
BOI
26h 29m
1 stop
$1,830American Airlines
Tue, 26 May - Sun, 7 Jun

American Airlines flights from Boise to Sydney

Our best American Airlines deals on Boise to Sydney flight tickets
American Airlines
26 May
BOI16:05Boise Air Term. Gowen Fld
22h 50m
1 stop
SYD06:55Sydney Kingsford Smith
7 June
SYD12:00Sydney Kingsford Smith
26h 29m
1 stop
BOI22:29Boise Air Term. Gowen Fld
$1,830
American Airlines
26 May
BOI13:59Boise Air Term. Gowen Fld
24h 26m
2 stops
SYD06:25Sydney Kingsford Smith
7 June
SYD12:00Sydney Kingsford Smith
26h 29m
1 stop
BOI22:29Boise Air Term. Gowen Fld
$1,837
American Airlines
4 May
BOI18:26Boise Air Term. Gowen Fld
20h 39m
2 stops
SYD07:05Sydney Kingsford Smith
11 May
SYD17:50Sydney Kingsford Smith
21h 51m
2 stops
BOI23:41Boise Air Term. Gowen Fld
$1,852

Alaska Airlines flights from Boise to Sydney

Our best Alaska Airlines deals on Boise to Sydney flight tickets
Alaska Airlines
20 May
BOI19:33Boise Air Term. Gowen Fld
19h 32m
1 stop
SYD07:05Sydney Kingsford Smith
2 June
SYD09:10Sydney Kingsford Smith
29h 48m
1 stop
BOI22:58Boise Air Term. Gowen Fld
$1,704
Alaska Airlines
23 May
BOI19:33Boise Air Term. Gowen Fld
19h 32m
1 stop
SYD07:05Sydney Kingsford Smith
2 June
SYD09:10Sydney Kingsford Smith
29h 48m
1 stop
BOI22:58Boise Air Term. Gowen Fld
$1,774
Alaska Airlines
30 Sept
BOI14:30Boise Air Term. Gowen Fld
25h 00m
2 stops
SYD07:30Sydney Kingsford Smith
5 Oct
SYD18:50Sydney Kingsford Smith
30h 17m
2 stops
BOI08:07Boise Air Term. Gowen Fld
$1,810

momondo Fare Finder

 
Customise your flight search to find flights from Boise to Sydney 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 18 April 2026.
Use the filters below to find and compare flights from Boise to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 20/5

19:33-07:05

1 stop19h 32m

Sydney Kingsford Smith

Tue 2/6

09:10-22:58

1 stop29h 48m

$1,704

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 23/5

19:33-07:05

1 stop19h 32m

Sydney Kingsford Smith

Tue 2/6

09:10-22:58

1 stop29h 48m

$1,774

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 1/7

18:51-07:05

1 stop20h 14m

Sydney Kingsford Smith

Wed 8/7

17:50-22:45

1 stop20h 55m

$1,799

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 30/9

18:47-07:30

1 stop20h 43m

Sydney Kingsford Smith

Mon 5/10

10:10-13:44

1 stop20h 34m

$1,800

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 30/9

14:30-07:30

2 stops25h 00m

Sydney Kingsford Smith

Mon 5/10

18:50-08:07

2 stops30h 17m

$1,810
Fastest return journey

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 4/5

19:14-07:30

1 stop20h 16m

Sydney Kingsford Smith

Mon 11/5

09:10-12:34

1 stop19h 24m

$1,814

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 3/7

18:51-07:05

1 stop20h 14m

Sydney Kingsford Smith

Sat 11/7

09:10-22:45

1 stop29h 35m

$1,816

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 28/6

08:03-07:05

1 stop31h 02m

Sydney Kingsford Smith

Wed 8/7

09:10-22:45

1 stop29h 35m

$1,827

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 4/5

19:14-11:50

2 stops24h 36m

Sydney Kingsford Smith

Mon 11/5

17:50-12:34

1 stop34h 44m

$1,828

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 26/5

16:05-06:55

1 stop22h 50m

Sydney Kingsford Smith

Sun 7/6

12:00-22:29

1 stop26h 29m

$1,830

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Boise to Sydney

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 typical price of a round-trip flight between Boise and Sydney?

When to book flights from Boise to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Boise to Sydney according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Boise to Sydney (BOI to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boise to Sydney

Fastest flight time

19h 50m

Direct flights

None
The fastest flight from Boise to Sydney takes 19h 50m
There are no direct flights from Boise to Sydney. There are no popular flight routes from Boise to Sydney.

Frequently asked questions about flying from Boise to Sydney

  • How far is Boise Air Term. Gowen Fld to Sydney Kingsford Smith by plane?

    The straight-line distance from Boise Air Term. Gowen Fld to Sydney Kingsford Smith is 12701.7 km. In terms of flight time, this usually takes a little over 19h 50m.

  • When did momondo last update prices for flights from Boise Air Term. Gowen Fld Airport to Sydney Kingsford Smith Airport?

    Prices for flights from Boise Air Term. Gowen Fld Airport to Sydney Kingsford Smith Airport were last updated today.

  • How old do you have to be to fly from Boise Air Term. Gowen Fld Airport to Sydney Kingsford Smith 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 Boise Air Term. Gowen Fld Airport to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The travel and health documents you'll need for your trip to Sydney Kingsford Smith 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 Sydney Kingsford Smith Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Terrigal
Penrith
Katoomba
Lithgow
Manly
Coogee
Leura
Bondi Beach
Cronulla
Randwick
Charlestown
Newport
Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Boise to Sydney?

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

Can I find flights from Boise to Sydney with flexible booking policies on momondo?

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

How can momondo help me find flights from Boise to Sydney?

Once all potential Boise to Sydney flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Boise to Sydney flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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1 adult
Mon 18/5
Mon 25/5

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