Cheap flights from Boise to Sydney from $1,729

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 9/2. 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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American Airlines Logo
07:20 - 06:55
BOI
-
SYD
29h 35m1 stop
American Airlines Logo
14:05 - 22:36
SYD
-
BOI
26h 31m1 stop
$1,729American Airlines
Mon, 9 Feb - Wed, 18 Feb
American Airlines Logo
14:48 - 09:00
BOI
-
SYD
24h 12m2 stops
American Airlines Logo
11:20 - 18:00
SYD
-
BOI
24h 40m2 stops
$1,733American Airlines
Mon, 9 Feb - Wed, 18 Feb
American Airlines Logo
12:37 - 09:00
BOI
-
SYD
26h 23m2 stops
American Airlines Logo
14:05 - 22:36
SYD
-
BOI
26h 31m1 stop
$1,735American Airlines
Mon, 9 Feb - Wed, 18 Feb
American Airlines Logo
14:48 - 09:00
BOI
-
SYD
24h 12m2 stops
American Airlines Logo
11:20 - 17:15
SYD
-
BOI
23h 55m2 stops
$1,884American Airlines
Thu, 22 Jan - Thu, 29 Jan
American Airlines Logo
14:48 - 09:00
BOI
-
SYD
24h 12m2 stops
American Airlines Logo
14:05 - 19:25
SYD
-
BOI
23h 20m1 stop
$1,886American Airlines
Thu, 22 Jan - Thu, 29 Jan
United Airlines Logo
14:20 - 09:15
BOI
-
SYD
24h 55m1 stop
United Airlines Logo
11:20 - 19:51
SYD
-
BOI
26h 31m1 stop
$1,904United Airlines
Thu, 22 Jan - Thu, 29 Jan
Alaska Airlines Logo
19:02 - 09:00
BOI
-
SYD
19h 58m1 stop
Alaska Airlines Logo
11:20 - 13:35
SYD
-
BOI
20h 15m1 stop
$1,910Alaska Airlines
Thu, 5 Feb - Mon, 9 Feb
Delta Logo
13:00 - 08:30
BOI
-
SYD
25h 30m2 stops
Delta Logo
10:40 - 20:10
SYD
-
BOI
27h 30m2 stops
$1,922Delta
Tue, 30 Dec - Sun, 15 Feb
Delta Logo
13:00 - 08:30
BOI
-
SYD
25h 30m2 stops
Delta Logo
10:40 - 18:22
SYD
-
BOI
25h 42m2 stops
$1,923Delta
Tue, 30 Dec - Sun, 15 Feb
United Airlines Logo
10:48 - 09:15
BOI
-
SYD
28h 27m1 stop
United Airlines Logo
11:20 - 18:07
SYD
-
BOI
24h 47m2 stops
$2,121United Airlines
Thu, 5 Feb - Mon, 9 Feb

Qantas Airways flights from Boise to Sydney

Our best Qantas Airways deals on Boise to Sydney flight tickets
Qantas Airways
12 Dec
BOI13:17Boise Air Term. Gowen Fld
31h 33m
2 stops
SYD14:50Sydney Kingsford Smith
14 Dec
SYD17:45Sydney Kingsford Smith
47h 20m
2 stops
BOI23:05Boise Air Term. Gowen Fld
Qantas Airways
7 Mar
BOI08:16Boise Air Term. Gowen Fld
32h 39m
2 stops
SYD10:55Sydney Kingsford Smith
18 Mar
SYD10:05Sydney Kingsford Smith
29h 54m
2 stops
BOI22:59Boise Air Term. Gowen Fld
Qantas Airways
7 Mar
BOI08:16Boise Air Term. Gowen Fld
31h 34m
2 stops
SYD09:50Sydney Kingsford Smith
18 Mar
SYD11:40Sydney Kingsford Smith
28h 19m
2 stops
BOI22:59Boise Air Term. Gowen Fld

Delta flights from Boise to Sydney

Our best Delta deals on Boise to Sydney flight tickets
Delta
30 Dec
BOI14:08Boise Air Term. Gowen Fld
22h 42m
1 stop
SYD06:50Sydney Kingsford Smith
15 Feb
SYD10:40Sydney Kingsford Smith
30h 25m
2 stops
BOI23:05Boise Air Term. Gowen Fld
Delta
30 Dec
BOI14:08Boise Air Term. Gowen Fld
24h 22m
1 stop
SYD08:30Sydney Kingsford Smith
15 Feb
SYD10:40Sydney Kingsford Smith
30h 25m
2 stops
BOI23:05Boise Air Term. Gowen Fld

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 9 December 2025.
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

Mon 9/2

07:20-06:55

1 stop29h 35m

Sydney Kingsford Smith

Wed 18/2

14:05-22:36

1 stop26h 31m

$1,729

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 9/2

14:48-09:00

2 stops24h 12m

Sydney Kingsford Smith

Wed 18/2

11:20-18:00

2 stops24h 40m

$1,733

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 9/2

12:37-09:00

2 stops26h 23m

Sydney Kingsford Smith

Wed 18/2

14:05-22:36

1 stop26h 31m

$1,735

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 22/1

14:48-09:00

2 stops24h 12m

Sydney Kingsford Smith

Thu 29/1

11:20-17:15

2 stops23h 55m

$1,884

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 22/1

14:48-09:00

2 stops24h 12m

Sydney Kingsford Smith

Thu 29/1

14:05-19:25

1 stop23h 20m

$1,886

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 22/1

14:20-09:15

1 stop24h 55m

Sydney Kingsford Smith

Thu 29/1

11:20-19:51

1 stop26h 31m

$1,904

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 5/2

19:02-09:00

1 stop19h 58m

Sydney Kingsford Smith

Mon 9/2

11:20-13:35

1 stop20h 15m

$1,910

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/12

13:00-08:30

2 stops25h 30m

Sydney Kingsford Smith

Sun 15/2

10:40-20:10

2 stops27h 30m

$1,922

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/12

13:00-08:30

2 stops25h 30m

Sydney Kingsford Smith

Sun 15/2

10:40-18:22

2 stops25h 42m

$1,923

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 5/2

10:48-09:15

1 stop28h 27m

Sydney Kingsford Smith

Mon 9/2

11:20-18:07

2 stops24h 47m

$2,121

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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

What is the cheapest month to fly to Sydney?

The month of September is, on average, the cheapest month to fly to Sydney from Boise, with most prices found around $1,452. If you aren’t able to travel to Sydney during the month of September, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,491.

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

25h 45m

Direct flights

None
The fastest flight from Boise to Sydney takes 25h 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 19h 58m.

  • 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
Leura
Manly
Bondi Beach
Coogee
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
Thu 8/1
Thu 15/1

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