Cheap flights from Boise to Sydney from $1,829

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 30/9. 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
18:47 - 07:30
BOI
-
SYD
20h 43m
1 stop
Alaska Airlines Logo
18:50 - 22:55
SYD
-
BOI
21h 05m
1 stop
$1,829Alaska 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 - 00:11
SYD
-
BOI
22h 21m
2 stops
$1,833Alaska Airlines
Wed, 30 Sep - Mon, 5 Oct
Alaska Airlines Logo
16:17 - 07:30
BOI
-
SYD
23h 13m
2 stops
Alaska Airlines Logo
18:50 - 10:42
SYD
-
BOI
32h 52m
2 stops
$1,835Alaska Airlines
Wed, 30 Sep - Mon, 5 Oct
Alaska Airlines Logo
18:47 - 07:30
BOI
-
SYD
20h 43m
1 stop
Alaska Airlines Logo
18:50 - 13:44
SYD
-
BOI
35h 54m
1 stop
$1,850Alaska Airlines
Wed, 30 Sep - Mon, 5 Oct
Qantas Airways Logo
19:14 - 07:05
BOI
-
SYD
19h 51m
1 stop
Qantas Airways Logo
17:50 - 23:01
SYD
-
BOI
21h 11m
1 stop
$1,866Qantas Airways
Tue, 5 May - Tue, 12 May
American Airlines Logo
11:19 - 06:55
BOI
-
SYD
27h 36m
1 stop
American Airlines Logo
12:00 - 22:29
SYD
-
BOI
26h 29m
1 stop
$1,871American Airlines
Tue, 26 May - Sun, 7 Jun
American Airlines Logo
11:19 - 06:55
BOI
-
SYD
27h 36m
1 stop
American Airlines Logo
12:00 - 22:29
SYD
-
BOI
26h 29m
1 stop
$1,874American Airlines
Tue, 26 May - Tue, 2 Jun
American Airlines Logo
13:59 - 06:25
BOI
-
SYD
24h 26m
2 stops
American Airlines Logo
12:00 - 22:29
SYD
-
BOI
26h 29m
1 stop
$1,877American Airlines
Tue, 26 May - Sun, 7 Jun
United Airlines Logo
14:05 - 06:55
BOI
-
SYD
24h 50m
1 stop
United Airlines Logo
10:20 - 16:44
SYD
-
BOI
22h 24m
1 stop
$1,878United Airlines
Mon, 25 May - Mon, 1 Jun
American Airlines Logo
13:59 - 07:05
BOI
-
SYD
25h 06m
2 stops
American Airlines Logo
12:00 - 22:29
SYD
-
BOI
26h 29m
1 stop
$1,880American Airlines
Mon, 25 May - Mon, 1 Jun

Air New Zealand flights from Boise to Sydney

Our best Air New Zealand deals on Boise to Sydney flight tickets
Air New Zealand
22 May
BOI07:00Boise Air Term. Gowen Fld
32h 00m
1 stop
SYD07:00Sydney Kingsford Smith
29 May
SYD10:20Sydney Kingsford Smith
22h 24m
1 stop
BOI16:44Boise Air Term. Gowen Fld
$2,099
Air New Zealand
30 July
BOI19:05Boise Air Term. Gowen Fld
19h 50m
1 stop
SYD06:55Sydney Kingsford Smith
31 Aug
SYD11:55Sydney Kingsford Smith
25h 24m
2 stops
BOI21:19Boise Air Term. Gowen Fld
$2,185
Air New Zealand
30 July
BOI19:05Boise Air Term. Gowen Fld
19h 50m
1 stop
SYD06:55Sydney Kingsford Smith
31 Aug
SYD09:55Sydney Kingsford Smith
27h 24m
2 stops
BOI21:19Boise Air Term. Gowen Fld
$2,187

United Airlines flights from Boise to Sydney

Our best United Airlines deals on Boise to Sydney flight tickets
United Airlines
25 May
BOI14:05Boise Air Term. Gowen Fld
24h 50m
1 stop
SYD06:55Sydney Kingsford Smith
1 June
SYD10:20Sydney Kingsford Smith
22h 24m
1 stop
BOI16:44Boise Air Term. Gowen Fld
$1,878
United Airlines
15 Apr
BOI07:11Boise Air Term. Gowen Fld
31h 49m
1 stop
SYD07:00Sydney Kingsford Smith
22 Apr
SYD09:30Sydney Kingsford Smith
26h 43m
1 stop
BOI20:13Boise Air Term. Gowen Fld
$1,890
United Airlines
22 June
BOI10:35Boise Air Term. Gowen Fld
28h 20m
1 stop
SYD06:55Sydney Kingsford Smith
1 July
SYD10:20Sydney Kingsford Smith
22h 24m
1 stop
BOI16:44Boise Air Term. Gowen Fld
$1,989

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 12 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 30/9

18:47-07:30

1 stop20h 43m

Sydney Kingsford Smith

Mon 5/10

18:50-22:55

1 stop21h 05m

$1,829

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

18:50-00:11

2 stops22h 21m

$1,833

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 30/9

16:17-07:30

2 stops23h 13m

Sydney Kingsford Smith

Mon 5/10

18:50-10:42

2 stops32h 52m

$1,835

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

18:50-13:44

1 stop35h 54m

$1,850
Fastest return journey

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 5/5

19:14-07:05

1 stop19h 51m

Sydney Kingsford Smith

Tue 12/5

17:50-23:01

1 stop21h 11m

$1,866

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 26/5

11:19-06:55

1 stop27h 36m

Sydney Kingsford Smith

Sun 7/6

12:00-22:29

1 stop26h 29m

$1,871

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 26/5

11:19-06:55

1 stop27h 36m

Sydney Kingsford Smith

Tue 2/6

12:00-22:29

1 stop26h 29m

$1,874

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 26/5

13:59-06:25

2 stops24h 26m

Sydney Kingsford Smith

Sun 7/6

12:00-22:29

1 stop26h 29m

$1,877

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 25/5

14:05-06:55

1 stop24h 50m

Sydney Kingsford Smith

Mon 1/6

10:20-16:44

1 stop22h 24m

$1,878

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 25/5

13:59-07:05

2 stops25h 06m

Sydney Kingsford Smith

Mon 1/6

12:00-22:29

1 stop26h 29m

$1,880

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?

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
Tue 12/5
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