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$600+ Cheap flights from Idaho to Australia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
1 adult, Economy
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Cheap flight deals from Idaho to Australia

Cheapest flights from Idaho to Australia
Explore the most affordable flight options available from Idaho to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2026.

This oojo deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/275:44 pm
GEG
-
BNE
2 stops42h 16m
Multiple Airlines
Mon 8/248:35 pm
BNE
-
GEG
1 stop19h 03m
Multiple Airlines
Deal found 7/23$1,043
This Justfly.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:25 am
BOI
-
SYD
2 stops32h 55m
Air Canada
Mon 10/510:20 am
SYD
-
BOI
2 stops40h 14m
Air Canada
Deal found 7/22$1,050
This American Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/276:30 am
GEG
-
BNE
2 stops29h 30m
American Airlines
Mon 8/248:35 pm
BNE
-
GEG
2 stops32h 19m
American Airlines
Deal found 7/23$1,057
This oojo deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:24 pm
GEG
-
SYD
2 stops43h 06m
Multiple Airlines
Tue 9/229:25 pm
SYD
-
GEG
1 stop32h 57m
Multiple Airlines
Deal found 7/24$1,063
This oojo deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:00 am
BOI
-
SYD
2 stops31h 05m
Multiple Airlines
Mon 10/2611:20 am
SYD
-
BOI
1 stop28h 37m
Multiple Airlines
Deal found 7/23$1,067
This oojo deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:05 am
BOI
-
SYD
2 stops31h 25m
Multiple Airlines
Mon 10/510:10 am
SYD
-
BOI
1 stop19h 18m
Multiple Airlines
Deal found 7/23$1,068
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:47 pm
BOI
-
SYD
1 stop20h 18m
Multiple Airlines
Wed 8/265:50 pm
SYD
-
BOI
1 stop21h 10m
Multiple Airlines
Deal found 7/22$1,069
This Air Canada deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:30 am
BOI
-
SYD
2 stops32h 50m
Air Canada
Wed 8/129:20 am
SYD
-
BOI
2 stops41h 46m
Air Canada
Deal found 7/21$1,072
This Justfly.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:15 am
BOI
-
SYD
2 stops31h 05m
Air Canada
Wed 10/2810:20 am
SYD
-
BOI
2 stops23h 22m
Air Canada
Deal found 7/25$1,073
This oojo deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:57 pm
BOI
-
SYD
1 stop20h 08m
Multiple Airlines
Wed 10/2811:20 am
SYD
-
BOI
1 stop28h 37m
Multiple Airlines
Deal found 7/25$1,074
This Qantas Airways deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/281:26 pm
GEG
-
BNE
2 stops22h 34m
Multiple Airlines
Sat 8/228:35 pm
BNE
-
GEG
1 stop19h 03m
Multiple Airlines
Deal found 7/23$1,088
This American Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:44 am
BOI
-
SYD
1 stop32h 11m
American Airlines
Wed 9/212:00 pm
SYD
-
BOI
1 stop26h 11m
American Airlines
Deal found 7/23$1,092

Find flight deals from Idaho to Australia

Keep the following information in mind while searching for Idaho to Australia flight deals. Data was last updated July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,050
(Justfly.com)

One-way from

$586
(Air Canada)

Popular in

November

Cheapest in

March

Average price

$1,361
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flights.
Search Deals
From Idaho to Australia
Search Deals
One-way flight from Idaho to Australia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($149 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Australia 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, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2026.
Use the filters below to find and compare flights from Idaho to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 8/9

6:30 am-7:20 am

2 stops32h 50m

Sydney Kingsford Smith

Wed 8/12

9:20 am-11:06 am

2 stops41h 46m

$1,072

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 9/30

2:14 pm-6:55 am

1 stop24h 41m

Sydney Kingsford Smith

Mon 10/5

11:20 am-2:10 pm

1 stop19h 50m

$1,095

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 10/10

3:36 pm-7:50 am

2 stops47h 14m

Sydney Kingsford Smith

Wed 10/28

9:40 am-2:56 pm

1 stop22h 16m

$1,113
Quickest round-trip

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Fri 8/21

4:21 pm-5:00 am

1 stop19h 39m

Brisbane

Fri 8/28

8:35 pm-10:38 pm

1 stop19h 03m

$1,113

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 11/1

7:00 am-9:35 am

2 stops31h 35m

Sydney Kingsford Smith

Sat 11/21

11:20 am-9:01 pm

2 stops28h 41m

$1,135

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Fri 8/21

12:44 pm-10:05 am

2 stops28h 21m

Brisbane

Fri 8/28

8:35 pm-10:38 pm

1 stop19h 03m

$1,137

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 11/1

2:39 pm-9:20 am

2 stops24h 41m

Sydney Kingsford Smith

Sat 11/21

11:50 am-11:14 am

1 stop17h 24m

$1,145

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Fri 8/21

5:20 am-5:00 am

2 stops30h 40m

Brisbane

Fri 8/28

8:35 pm-11:54 am

2 stops32h 19m

$1,157

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Mon 8/24

1:27 pm-5:00 am

2 stops22h 33m

Brisbane

Sun 8/30

9:00 am-10:38 pm

2 stops54h 38m

$1,159

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 12/30

1:23 pm-10:20 am

3 stops25h 57m

Sydney Kingsford Smith

Tue 3/2

11:15 am-3:40 pm

2 stops23h 25m

$1,180

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 43 resultsSorted by cheapest first
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Best time to book a flight from Idaho to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Idaho with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to Australia

What is the cheapest month to book a flight from Idaho to Australia?

Currently, January is the cheapest month in which you can book a flight from Idaho to Australia (average of $1,068). Flying from Idaho to Australia in July is currently the most expensive (average of $3,016). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Idaho to Australia?

    There are many flights that can get you from Idaho to Australia in 24h 41m. Fly via Air Canada, American Airlines, or United Airlines to get the fastest option. The distance from Idaho to Australia is about 7894 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Idaho to Australia that include hotel bookings?

    Yes. In addition to deals on Idaho to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Australia.

  • Can I find deals for business class flights from Idaho to Australia?

    Yes. Cheapflights offers flight deals from Idaho to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to Australia?

    Currently, January is the cheapest month in which you can book a flight from Idaho to Australia (average of $1,068). Flying from Idaho to Australia in July is currently the most expensive (average of $3,016). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Idaho to Australia

Discover the top 2 airlines that operate flights from Idaho to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$966Average$1,305FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$967Average$1,161FlexibilityNo cancel feeOn-time71%

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