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$424+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Idaho to Australia

Keep the following information in mind while searching for Idaho to Australia flight deals. Data was last updated June 12, 2025.

Round-trip from

$857
(Justfly.com)

One-way from

$424
(American Airlines)

Popular in

December

Cheapest in

May

Average price

$1,357
From Idaho to Australia
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One-way flight from Idaho to Australia
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($426 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($109 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find 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 June 12, 2025.

This Justfly.com deal was found by Cheapflights users on 6/9. 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.
Sat 11/12:37 pmGEG - SYD
1 stop22h 48mQantas Airways
Sat 11/811:15 amSYD - GEG
1 stop21h 42mQantas Airways
Deal found 6/9$857
This Qantas Airways deal was found by Cheapflights users on 6/11. 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.
Thu 7/316:49 pmGEG - SYD
1 stop19h 41mMultiple Airlines
Sat 8/165:45 pmSYD - GEG
1 stop21h 40mMultiple Airlines
Deal found 6/11$861
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/315:30 amGEG - SYD
2 stops32h 30mUnited Airlines
Sat 8/169:30 amSYD - GEG
2 stops24h 57mUnited Airlines
Deal found 6/10$881
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 7/263:35 pmBOI - SYD
1 stop23h 20mAmerican Airlines
Sat 8/29:10 amSYD - BOI
2 stops29h 16mAmerican Airlines
Deal found 6/11$944
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/312:36 pmGEG - SYD
1 stop22h 59mDelta
Sat 8/169:25 amSYD - GEG
1 stop21h 23mDelta
Deal found 6/10$980
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/97:12 pmBOI - SYD
2 stops27h 28mMultiple Airlines
Fri 8/155:45 pmSYD - BOI
1 stop21h 09mMultiple Airlines
Deal found 6/9$1,159
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/258:48 pmGEG - SYD
2 stops29h 57mAlaska Airlines
Fri 8/19:40 pmSYD - GEG
2 stops19h 19mAlaska Airlines
Deal found 6/10$1,164
This Gurufare deal was found by Cheapflights users on 6/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1012:35 pmGEG - PER
2 stops37h 30mQantas Airways
Wed 9/2410:30 amPER - GEG
2 stops26h 55mQantas Airways
Deal found 6/10$1,181
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:08 amBOI - SYD
1 stop29h 17mAlaska Airlines
Mon 11/175:25 pmSYD - BOI
1 stop23h 37mAlaska Airlines
Deal found 6/10$1,238
This Jetabroad deal was found by Cheapflights users on 6/12. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/163:29 pmGEG - SYD
1 stop22h 26mAir New Zealand
Wed 6/1810:20 amSYD - GEG
1 stop21h 27mAir New Zealand
Deal found 6/12$1,347
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:39 amBOI - SYD
2 stops25h 41mUnited Airlines
Sun 2/1511:20 amSYD - BOI
1 stop20h 10mUnited Airlines
Deal found 6/10$1,365
This Jetabroad deal was found by Cheapflights users on 6/12. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/276:49 pmGEG - BNE
2 stops22h 36mMultiple Airlines
Sun 8/311:35 amBNE - GEG
2 stops23h 12mMultiple Airlines
Deal found 6/12$1,387

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 June 12, 2025.
Use the filters below to find and compare flights from Idaho to Australia that are best for you.

Fly from

Idaho

Fly to

Australia

Route

Depart

Return

Price

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 11/1

2:37 pm-7:25 am

1 stop22h 48m

Sydney Kingsford Smith

Sat 11/8

11:15 am-1:57 pm

1 stop21h 42m

$857

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 7/31

6:49 pm-7:30 am

1 stop19h 41m

Sydney Kingsford Smith

Sat 8/16

5:45 pm-10:25 pm

1 stop21h 40m

$861

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 7/31

5:30 am-7:00 am

2 stops32h 30m

Sydney Kingsford Smith

Sat 8/16

9:30 am-5:27 pm

2 stops24h 57m

$881

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 7/26

3:35 pm-6:55 am

1 stop23h 20m

Sydney Kingsford Smith

Sat 8/2

9:10 am-10:26 pm

2 stops29h 16m

$944

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 7/31

2:36 pm-6:35 am

1 stop22h 59m

Sydney Kingsford Smith

Sat 8/16

9:25 am-1:48 pm

1 stop21h 23m

$980

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 8/9

7:12 pm-2:40 pm

2 stops27h 28m

Sydney Kingsford Smith

Fri 8/15

5:45 pm-10:54 pm

1 stop21h 09m

$1,159

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 7/25

8:48 pm-7:45 pm

2 stops29h 57m

Sydney Kingsford Smith

Fri 8/1

9:40 pm-11:59 pm

2 stops19h 19m

$1,164

SpokanePerth

GEG - PER

GEGPER

Spokane

Wed 9/10

12:35 pm-5:05 pm

2 stops37h 30m

Perth

Wed 9/24

10:30 am-10:25 pm

2 stops26h 55m

$1,181

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 11/13

8:08 am-7:25 am

1 stop29h 17m

Sydney Kingsford Smith

Mon 11/17

5:25 pm-11:02 pm

1 stop23h 37m

$1,238

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Sun 7/27

6:49 pm-10:25 am

2 stops22h 36m

Brisbane

Sun 8/3

11:35 am-5:47 pm

2 stops23h 12m

$1,387

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 37 results
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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, March is the cheapest month in which you can book a flight from Idaho to Australia (average of $1,041). Flying from Idaho to Australia in December is currently the most expensive (average of $1,635). 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.

What is the cheapest time of day to fly from ID to AU?

Find hourly flight availability from Idaho to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Australia as you normally would.

Rainfall in Australia by month

Plan your trip to Australia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Australia ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Australia when rainfall is around 2.0 in.

Temperature in Australia by month

Plan your trip to Australia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Australia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated June 12, 2025.
To help decide which airline to fly from Idaho to Australia, see what other customers have to say about Air Tahiti Nui, Singapore Airlines and Alaska Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.7
Very good
64 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Singapore Airlines
8.1
Very good
1,302 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Alaska Airlines
8.0
Very good
10,000 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very good
7,950 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air New Zealand
8.0
Very good
483 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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.

  • What are the cheapest airlines to fly from Idaho to Australia one-way?

    One-way options have recently been found by users for as low as $424 on American Airlines. Other airlines that offer cheap prices include Qantas Airways from $783 and United Airlines from $1,366 one-way.

  • 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, March is the cheapest month in which you can book a flight from Idaho to Australia (average of $1,041). Flying from Idaho to Australia in December is currently the most expensive (average of $1,635). 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

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Top airline flying from Idaho to Australia

Discover the top airline 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$926Average$1,359FlexibilityNo cancel feeOn-time69%

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