Cheap flights from Boise to Sydney from $814

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boise to Sydney departing on 15/3. 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

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Air New Zealand Logo
07:00 - 10:40
BOI
-
SYD
35h 40m
2 stops
Air New Zealand Logo
11:55 - 19:16
SYD
-
BOI
23h 21m
2 stops
$1,668Air New Zealand
Thu, 2 Jul - Sun, 23 Aug
Air New Zealand Logo
07:00 - 10:40
BOI
-
SYD
35h 40m
2 stops
Air New Zealand Logo
11:55 - 19:16
SYD
-
BOI
23h 21m
2 stops
$1,670Air New Zealand
Thu, 30 Jul - Mon, 31 Aug
Air New Zealand Logo
07:00 - 08:45
BOI
-
SYD
33h 45m
2 stops
Air New Zealand Logo
09:55 - 19:16
SYD
-
BOI
25h 21m
2 stops
$1,671Air New Zealand
Thu, 30 Jul - Mon, 31 Aug
United Airlines Logo
12:30 - 07:55
BOI
-
SYD
26h 25m
1 stop
United Airlines Logo
10:20 - 21:15
SYD
-
BOI
26h 55m
1 stop
$1,768United Airlines
Sun, 29 Mar - Sun, 5 Apr
Air New Zealand Logo
07:00 - 10:40
BOI
-
SYD
35h 40m
2 stops
Air New Zealand Logo
19:20 - 21:23
SYD
-
BOI
42h 03m
2 stops
$1,769Air New Zealand
Sat, 13 Jun - Sat, 27 Jun
United Airlines Logo
18:59 - 06:55
BOI
-
SYD
19h 56m
1 stop
United Airlines Logo
10:20 - 21:15
SYD
-
BOI
26h 55m
1 stop
$1,785United Airlines
Thu, 2 Jul - Sun, 30 Aug
United Airlines Logo
11:15 - 06:55
BOI
-
SYD
27h 40m
1 stop
United Airlines Logo
10:20 - 19:16
SYD
-
BOI
24h 56m
1 stop
$1,786United Airlines
Thu, 30 Jul - Mon, 31 Aug
United Airlines Logo
14:43 - 06:55
BOI
-
SYD
24h 12m
2 stops
United Airlines Logo
10:20 - 17:55
SYD
-
BOI
23h 35m
2 stops
$1,792United Airlines
Thu, 30 Jul - Sun, 30 Aug
Delta Logo
10:35 - 07:30
BOI
-
SYD
27h 55m
2 stops
Delta Logo
13:15 - 21:35
SYD
-
BOI
25h 20m
1 stop
$1,803Delta
Thu, 12 Mar - Thu, 19 Mar
Air New Zealand Logo
07:00 - 08:45
BOI
-
SYD
33h 45m
2 stops
Air New Zealand Logo
11:55 - 21:23
SYD
-
BOI
25h 28m
2 stops
$1,809Air New Zealand
Fri, 10 Jul - Fri, 17 Jul

United Airlines flights from Boise to Sydney

Our best United Airlines deals on Boise to Sydney flight tickets
United Airlines
18 Feb
BOI13:44Boise Air Term. Gowen Fld
22h 36m
1 stop
SYD06:20Sydney Kingsford Smith
22 Feb
SYD12:10Sydney Kingsford Smith
17h 07m
1 stop
BOI11:17Boise Air Term. Gowen Fld
$1,713
United Airlines
18 Feb
BOI10:53Boise Air Term. Gowen Fld
25h 27m
1 stop
SYD06:20Sydney Kingsford Smith
22 Feb
SYD11:20Sydney Kingsford Smith
27h 35m
1 stop
BOI20:55Boise Air Term. Gowen Fld
$1,715
United Airlines
18 Feb
BOI10:53Boise Air Term. Gowen Fld
25h 27m
1 stop
SYD06:20Sydney Kingsford Smith
22 Feb
SYD14:00Sydney Kingsford Smith
25h 11m
1 stop
BOI21:11Boise Air Term. Gowen Fld
$1,716

Air New Zealand flights from Boise to Sydney

Our best Air New Zealand deals on Boise to Sydney flight tickets
Air New Zealand
2 July
BOI07:00Boise Air Term. Gowen Fld
35h 40m
2 stops
SYD10:40Sydney Kingsford Smith
30 Aug
SYD11:55Sydney Kingsford Smith
26h 27m
2 stops
BOI22:22Boise Air Term. Gowen Fld
$1,668
Air New Zealand
30 July
BOI07:00Boise Air Term. Gowen Fld
33h 45m
2 stops
SYD08:45Sydney Kingsford Smith
30 Aug
SYD09:55Sydney Kingsford Smith
28h 27m
2 stops
BOI22:22Boise Air Term. Gowen Fld
$1,670
Air New Zealand
30 July
BOI07:00Boise Air Term. Gowen Fld
33h 45m
2 stops
SYD08:45Sydney Kingsford Smith
31 Aug
SYD09:55Sydney Kingsford Smith
25h 21m
2 stops
BOI19:16Boise Air Term. Gowen Fld
$1,671

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 13 February 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

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 2/7

07:00-10:40

2 stops35h 40m

Sydney Kingsford Smith

Sun 23/8

11:55-19:16

2 stops23h 21m

$1,668

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

07:00-10:40

2 stops35h 40m

Sydney Kingsford Smith

Mon 31/8

11:55-19:16

2 stops23h 21m

$1,670

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

07:00-08:45

2 stops33h 45m

Sydney Kingsford Smith

Mon 31/8

09:55-19:16

2 stops25h 21m

$1,671

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 29/3

12:30-07:55

1 stop26h 25m

Sydney Kingsford Smith

Sun 5/4

10:20-21:15

1 stop26h 55m

$1,768

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 13/6

07:00-10:40

2 stops35h 40m

Sydney Kingsford Smith

Sat 27/6

19:20-21:23

2 stops42h 03m

$1,769

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 2/7

18:59-06:55

1 stop19h 56m

Sydney Kingsford Smith

Sun 30/8

10:20-21:15

1 stop26h 55m

$1,785

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

11:15-06:55

1 stop27h 40m

Sydney Kingsford Smith

Mon 31/8

10:20-19:16

1 stop24h 56m

$1,786

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

14:43-06:55

2 stops24h 12m

Sydney Kingsford Smith

Sun 30/8

10:20-17:55

2 stops23h 35m

$1,792

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 12/3

10:35-07:30

2 stops27h 55m

Sydney Kingsford Smith

Thu 19/3

13:15-21:35

1 stop25h 20m

$1,803

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 10/7

07:00-08:45

2 stops33h 45m

Sydney Kingsford Smith

Fri 17/7

11:55-21:23

2 stops25h 28m

$1,809

Flights are sorted by cheapest return flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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See travel insights to Sydney from

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 cheapest airline that flies from Boise Air Term. Gowen Fld to Sydney Kingsford Smith?

United Airlines is the most popular carrier operating from Boise Air Term. Gowen Fld to Sydney Kingsford Smith

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

22h 45m

Direct flights

None
The fastest flight from Boise to Sydney takes 22h 45m
There are no direct flights from Boise to Sydney. There are no popular flight routes 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 22h 45m.

  • 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
Leura
Coogee
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
Sun 15/3
Sun 22/3

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