Cheap flights from Boise to Sydney from $1,770

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 11/5. 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

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.

Find the cheapest flights from Boise to Sydney

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
08:11 - 12:05
BOI
-
SYD
35h 54m
2 stops
Multiple Airlines Logo
13:15 - 22:58
SYD
-
BOI
25h 43m
2 stops
$1,770Multiple Airlines
Mon, 11 May - Mon, 18 May
Multiple Airlines Logo
19:14 - 11:50
BOI
-
SYD
24h 36m
2 stops
Multiple Airlines Logo
13:15 - 22:58
SYD
-
BOI
25h 43m
2 stops
$1,783Multiple Airlines
Sun, 10 May - Sun, 17 May
United Airlines Logo
14:33 - 07:00
BOI
-
SYD
24h 27m
2 stops
United Airlines Logo
10:20 - 15:26
SYD
-
BOI
21h 06m
1 stop
$1,911United Airlines
Mon, 11 May - Mon, 18 May
United Airlines Logo
12:30 - 06:55
BOI
-
SYD
26h 25m
1 stop
United Airlines Logo
10:20 - 11:27
SYD
-
BOI
17h 07m
1 stop
$1,916United Airlines
Sun, 10 May - Sun, 17 May
American Airlines Logo
13:41 - 06:55
BOI
-
SYD
25h 14m
1 stop
American Airlines Logo
12:00 - 22:38
SYD
-
BOI
26h 38m
1 stop
$1,924American Airlines
Tue, 12 May - Tue, 19 May
American Airlines Logo
13:41 - 06:55
BOI
-
SYD
25h 14m
1 stop
American Airlines Logo
12:00 - 22:54
SYD
-
BOI
26h 54m
1 stop
$1,925American Airlines
Sun, 10 May - Sun, 17 May
American Airlines Logo
13:41 - 06:55
BOI
-
SYD
25h 14m
1 stop
American Airlines Logo
09:10 - 20:18
SYD
-
BOI
27h 08m
2 stops
$1,929American Airlines
Tue, 12 May - Tue, 19 May
American Airlines Logo
14:14 - 07:05
BOI
-
SYD
24h 51m
2 stops
American Airlines Logo
12:00 - 22:54
SYD
-
BOI
26h 54m
1 stop
$1,931American Airlines
Sun, 10 May - Sun, 17 May
Multiple Airlines Logo
20:10 - 18:50
BOI
-
SYD
54h 40m
2 stops
Multiple Airlines Logo
20:45 - 11:03
SYD
-
BOI
30h 18m
2 stops
$1,950Multiple Airlines
Sat, 9 May - Sat, 16 May
Multiple Airlines Logo
06:00 - 18:50
BOI
-
SYD
20h 50m
2 stops
Multiple Airlines Logo
20:45 - 12:34
SYD
-
BOI
31h 49m
2 stops
$1,953Multiple Airlines
Fri, 24 Apr - Fri, 1 May

United Airlines flights from Boise to Sydney

Our best United Airlines deals on Boise to Sydney flight tickets
United Airlines
11 May
BOI18:58Boise Air Term. Gowen Fld
19h 57m
1 stop
SYD06:55Sydney Kingsford Smith
18 May
SYD10:20Sydney Kingsford Smith
24h 51m
1 stop
BOI19:11Boise Air Term. Gowen Fld
$1,911
United Airlines
10 May
BOI12:30Boise Air Term. Gowen Fld
26h 25m
1 stop
SYD06:55Sydney Kingsford Smith
17 May
SYD10:20Sydney Kingsford Smith
17h 07m
1 stop
BOI11:27Boise Air Term. Gowen Fld
$1,916
United Airlines
11 July
BOI14:40Boise Air Term. Gowen Fld
24h 20m
2 stops
SYD07:00Sydney Kingsford Smith
25 July
SYD10:20Sydney Kingsford Smith
22h 24m
1 stop
BOI16:44Boise Air Term. Gowen Fld
$2,047

American Airlines flights from Boise to Sydney

Our best American Airlines deals on Boise to Sydney flight tickets
American Airlines
12 May
BOI13:41Boise Air Term. Gowen Fld
25h 14m
1 stop
SYD06:55Sydney Kingsford Smith
19 May
SYD12:00Sydney Kingsford Smith
26h 38m
1 stop
BOI22:38Boise Air Term. Gowen Fld
$1,924
American Airlines
10 May
BOI13:41Boise Air Term. Gowen Fld
25h 14m
1 stop
SYD06:55Sydney Kingsford Smith
17 May
SYD12:00Sydney Kingsford Smith
26h 54m
1 stop
BOI22:54Boise Air Term. Gowen Fld
$1,925
American Airlines
12 May
BOI13:41Boise Air Term. Gowen Fld
25h 14m
1 stop
SYD06:55Sydney Kingsford Smith
19 May
SYD09:10Sydney Kingsford Smith
27h 08m
2 stops
BOI20:18Boise Air Term. Gowen Fld
$1,929

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 29 March 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

Mon 11/5

08:11-12:05

2 stops35h 54m

Sydney Kingsford Smith

Mon 18/5

13:15-22:58

2 stops25h 43m

$1,770

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 10/5

19:14-11:50

2 stops24h 36m

Sydney Kingsford Smith

Sun 17/5

13:15-22:58

2 stops25h 43m

$1,783

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 11/5

14:33-07:00

2 stops24h 27m

Sydney Kingsford Smith

Mon 18/5

10:20-15:26

1 stop21h 06m

$1,911
Fastest return journey

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 10/5

12:30-06:55

1 stop26h 25m

Sydney Kingsford Smith

Sun 17/5

10:20-11:27

1 stop17h 07m

$1,916

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 12/5

13:41-06:55

1 stop25h 14m

Sydney Kingsford Smith

Tue 19/5

12:00-22:38

1 stop26h 38m

$1,924

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 10/5

13:41-06:55

1 stop25h 14m

Sydney Kingsford Smith

Sun 17/5

12:00-22:54

1 stop26h 54m

$1,925

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 12/5

13:41-06:55

1 stop25h 14m

Sydney Kingsford Smith

Tue 19/5

09:10-20:18

2 stops27h 08m

$1,929

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 10/5

14:14-07:05

2 stops24h 51m

Sydney Kingsford Smith

Sun 17/5

12:00-22:54

1 stop26h 54m

$1,931

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 9/5

20:10-18:50

2 stops54h 40m

Sydney Kingsford Smith

Sat 16/5

20:45-11:03

2 stops30h 18m

$1,950

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 24/4

06:00-18:50

2 stops20h 50m

Sydney Kingsford Smith

Fri 1/5

20:45-12:34

2 stops31h 49m

$1,953

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

20h 39m

Direct flights

None
The fastest flight from Boise to Sydney takes 20h 39m
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 39m.

  • 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.

An easier way to manage your Sydney trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 28/4
Tue 5/5

Find better results for your trip to Australia