Cheap flights from Boise to Sydney from $1,747

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 28/1. 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.
United Airlines Logo
14:20 - 06:20
BOI
-
SYD
22h 00m1 stop
United Airlines Logo
14:00 - 21:23
SYD
-
BOI
25h 23m1 stop
$1,747United Airlines
Wed, 28 Jan - Wed, 4 Feb
United Airlines Logo
08:10 - 06:20
BOI
-
SYD
28h 10m2 stops
United Airlines Logo
12:10 - 18:07
SYD
-
BOI
23h 57m2 stops
$1,755United Airlines
Wed, 28 Jan - Wed, 4 Feb
Alaska Airlines Logo
19:02 - 09:00
BOI
-
SYD
19h 58m1 stop
Alaska Airlines Logo
11:20 - 13:35
SYD
-
BOI
20h 15m1 stop
$1,904Alaska Airlines
Thu, 5 Feb - Mon, 9 Feb
United Airlines Logo
07:45 - 06:20
BOI
-
SYD
28h 35m1 stop
United Airlines Logo
14:00 - 21:23
SYD
-
BOI
25h 23m1 stop
$2,108United Airlines
Thu, 5 Feb - Mon, 9 Feb
United Airlines Logo
14:37 - 09:15
BOI
-
SYD
24h 38m2 stops
United Airlines Logo
11:20 - 18:07
SYD
-
BOI
24h 47m2 stops
$2,115United Airlines
Thu, 5 Feb - Mon, 9 Feb
Qantas Airways Logo
13:27 - 14:50
BOI
-
SYD
31h 23m2 stops
Qantas Airways Logo
19:15 - 22:36
SYD
-
BOI
45h 21m2 stops
$2,294Qantas Airways
Tue, 30 Dec - Sun, 15 Feb
United Airlines Logo
08:30 - 06:20
BOI
-
SYD
27h 50m1 stop
United Airlines Logo
14:00 - 21:11
SYD
-
BOI
25h 11m1 stop
$2,363United Airlines
Tue, 30 Dec - Sun, 15 Feb
Delta Logo
14:08 - 08:30
BOI
-
SYD
24h 22m1 stop
Delta Logo
10:40 - 17:40
SYD
-
BOI
25h 00m2 stops
$2,371Delta
Tue, 30 Dec - Sun, 15 Feb
Multiple Airlines Logo
08:07 - 18:15
BOI
-
SYD
40h 08m3 stops
Multiple Airlines Logo
22:20 - 22:36
SYD
-
BOI
42h 16m2 stops
$3,215Multiple Airlines
Tue, 30 Dec - Sun, 15 Feb
Multiple Airlines Logo
07:15 - 20:50
BOI
-
SYD
43h 35m3 stops
Multiple Airlines Logo
08:55 - 12:44
SYD
-
BOI
45h 49m3 stops
$5,081Multiple Airlines
Tue, 30 Dec - Sun, 15 Feb

United Airlines flights from Boise to Sydney

Our best United Airlines deals on Boise to Sydney flight tickets
United Airlines
28 Jan
BOI14:20Boise Air Term. Gowen Fld
22h 00m
1 stop
SYD06:20Sydney Kingsford Smith
4 Feb
SYD14:00Sydney Kingsford Smith
25h 23m
1 stop
BOI21:23Boise Air Term. Gowen Fld
United Airlines
28 Jan
BOI08:10Boise Air Term. Gowen Fld
28h 10m
2 stops
SYD06:20Sydney Kingsford Smith
4 Feb
SYD12:10Sydney Kingsford Smith
23h 57m
2 stops
BOI18:07Boise Air Term. Gowen Fld
United Airlines
5 Feb
BOI07:45Boise Air Term. Gowen Fld
28h 35m
1 stop
SYD06:20Sydney Kingsford Smith
9 Feb
SYD14:00Sydney Kingsford Smith
25h 23m
1 stop
BOI21:23Boise Air Term. Gowen Fld

Qantas Airways flights from Boise to Sydney

Our best Qantas Airways deals on Boise to Sydney flight tickets
Qantas Airways
30 Dec
BOI13:27Boise Air Term. Gowen Fld
31h 23m
2 stops
SYD14:50Sydney Kingsford Smith
15 Feb
SYD19:15Sydney Kingsford Smith
45h 21m
2 stops
BOI22:36Boise Air Term. Gowen Fld
Qantas Airways
7 Mar
BOI08:16Boise Air Term. Gowen Fld
34h 04m
2 stops
SYD12:20Sydney Kingsford Smith
18 Mar
SYD17:30Sydney Kingsford Smith
22h 29m
2 stops
BOI22:59Boise Air Term. Gowen Fld
Qantas Airways
7 Mar
BOI08:16Boise Air Term. Gowen Fld
31h 04m
2 stops
SYD09:20Sydney Kingsford Smith
18 Mar
SYD07:05Sydney Kingsford Smith
32h 54m
2 stops
BOI22:59Boise 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 14 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

Wed 28/1

14:20-06:20

1 stop22h 00m

Sydney Kingsford Smith

Wed 4/2

14:00-21:23

1 stop25h 23m

$1,747

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 28/1

08:10-06:20

2 stops28h 10m

Sydney Kingsford Smith

Wed 4/2

12:10-18:07

2 stops23h 57m

$1,755

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

$1,904

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 5/2

07:45-06:20

1 stop28h 35m

Sydney Kingsford Smith

Mon 9/2

14:00-21:23

1 stop25h 23m

$2,108

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 5/2

14:37-09:15

2 stops24h 38m

Sydney Kingsford Smith

Mon 9/2

11:20-18:07

2 stops24h 47m

$2,115

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/12

13:27-14:50

2 stops31h 23m

Sydney Kingsford Smith

Sun 15/2

19:15-22:36

2 stops45h 21m

$2,294

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/12

08:30-06:20

1 stop27h 50m

Sydney Kingsford Smith

Sun 15/2

14:00-21:11

1 stop25h 11m

$2,363

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/12

14:08-08:30

1 stop24h 22m

Sydney Kingsford Smith

Sun 15/2

10:40-17:40

2 stops25h 00m

$2,371

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/12

08:07-18:15

3 stops40h 08m

Sydney Kingsford Smith

Sun 15/2

22:20-22:36

2 stops42h 16m

$3,215

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/12

07:15-20:50

3 stops43h 35m

Sydney Kingsford Smith

Sun 15/2

08:55-12:44

3 stops45h 49m

$5,081

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 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 $1,447. 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 $1,486.

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

20h 05m

Direct flights

None
The fastest flight from Boise to Sydney takes 20h 05m
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 20h 05m.

  • 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
Tue 13/1
Tue 20/1

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