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$791+ Cheap flights from Idaho to Australia

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/31. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$791
(Alaska Airlines)

Popular in

December

Cheapest in

May

Average price

$1,385
From Idaho to Australia
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($293 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($65 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 3, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/1. 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 7/316:49 pmGEG - SYD
1 stop19h 16mAlaska Airlines
Sat 8/169:10 amSYD - GEG
1 stop25h 37mAlaska Airlines
Deal found 7/1$791
This FlightHub deal was found by Cheapflights users on 7/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/146:49 pmGEG - SYD
1 stop19h 41mQantas Airways
Thu 8/215:45 pmSYD - GEG
1 stop21h 40mQantas Airways
Deal found 7/1$846
This United Airlines deal was found by Cheapflights users on 7/1. 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 8/141:37 pmGEG - SYD
2 stops24h 18mUnited Airlines
Thu 8/2110:20 amSYD - GEG
1 stop17h 18mUnited Airlines
Deal found 7/1$877
This American Airlines deal was found by Cheapflights users on 7/2. 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 10/2512:33 pmGEG - SYD
2 stops24h 57mAmerican Airlines
Sun 11/25:45 pmSYD - GEG
2 stops24h 16mAmerican Airlines
Deal found 7/2$886
This Alaska Airlines deal was found by Cheapflights users on 7/1. 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 8/156:25 amBOI - SYD
2 stops32h 40mAlaska Airlines
Fri 8/229:10 amSYD - BOI
2 stops28h 47mAlaska Airlines
Deal found 7/1$888
This Qantas Airways deal was found by Cheapflights users on 7/2. 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.
Sun 10/261:47 pmGEG - SYD
1 stop22h 23mMultiple Airlines
Mon 11/35:45 pmSYD - GEG
1 stop23h 38mMultiple Airlines
Deal found 7/2$902
This American Airlines deal was found by Cheapflights users on 7/3. 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.
Sun 8/171:50 pmBOI - SYD
2 stops25h 15mAmerican Airlines
Sun 8/245:45 pmSYD - BOI
2 stops21h 46mAmerican Airlines
Deal found 7/3$1,018
This Delta deal was found by Cheapflights users on 7/2. 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.
Tue 7/293:38 pmGEG - SYD
2 stops21h 57mDelta
Tue 8/59:25 amSYD - GEG
1 stop21h 26mDelta
Deal found 7/2$1,046
This Qantas Airways deal was found by Cheapflights users on 7/2. 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.
Sat 8/166:49 pmGEG - PER
2 stops31h 16mQantas Airways
Sat 8/2310:30 amPER - GEG
2 stops26h 55mQantas Airways
Deal found 7/2$1,201
This Qantas Airways deal was found by Cheapflights users on 6/30. 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 8/211:25 pmGEG - CNS
2 stops34h 05mQantas Airways
Mon 8/255:35 pmCNS - GEG
2 stops45h 50mQantas Airways
Deal found 6/30$1,278
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Fri 8/156:51 pmBOI - SYD
1 stop20h 39mMultiple Airlines
Fri 8/225:45 pmSYD - BOI
1 stop21h 09mMultiple Airlines
Deal found 7/1$1,285
This United Airlines deal was found by Cheapflights users on 7/2. 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 9/182:13 pmBOI - SYD
1 stop24h 47mUnited Airlines
Fri 9/2610:20 amSYD - BOI
1 stop19h 28mUnited Airlines
Deal found 7/2$1,327

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 3, 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

Thu 7/31

6:49 pm-7:05 am

1 stop19h 16m

Sydney Kingsford Smith

Sat 8/16

9:10 am-5:47 pm

1 stop25h 37m

$791

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 8/14

6:49 pm-7:30 am

1 stop19h 41m

Sydney Kingsford Smith

Thu 8/21

5:45 pm-10:25 pm

1 stop21h 40m

$846

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 8/14

1:37 pm-6:55 am

2 stops24h 18m

Sydney Kingsford Smith

Thu 8/21

10:20 am-10:38 am

1 stop17h 18m

$877

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 10/25

12:33 pm-7:30 am

2 stops24h 57m

Sydney Kingsford Smith

Sun 11/2

5:45 pm-12:01 am

2 stops24h 16m

$886

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 8/15

6:25 am-7:05 am

2 stops32h 40m

Sydney Kingsford Smith

Fri 8/22

9:10 am-9:57 pm

2 stops28h 47m

$888

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 10/26

1:47 pm-6:10 am

1 stop22h 23m

Sydney Kingsford Smith

Mon 11/3

5:45 pm-10:23 pm

1 stop23h 38m

$902

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 8/17

1:50 pm-7:05 am

2 stops25h 15m

Sydney Kingsford Smith

Sun 8/24

5:45 pm-11:31 pm

2 stops21h 46m

$1,018

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 7/29

3:38 pm-6:35 am

2 stops21h 57m

Sydney Kingsford Smith

Tue 8/5

9:25 am-1:51 pm

1 stop21h 26m

$1,046

SpokanePerth

GEG - PER

GEGPER

Spokane

Sat 8/16

6:49 pm-5:05 pm

2 stops31h 16m

Perth

Sat 8/23

10:30 am-10:25 pm

2 stops26h 55m

$1,201

SpokaneCairns

GEG - CNS

GEGCNS

Spokane

Thu 8/21

1:25 pm-4:30 pm

2 stops34h 05m

Cairns

Mon 8/25

5:35 pm-10:25 pm

2 stops45h 50m

$1,278

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 30 results
1
2
3

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, February is the cheapest month in which you can book a flight from Idaho to Australia (average of $1,040). Flying from Idaho to Australia in December is currently the most expensive (average of $1,630). 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 July 3, 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.

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 July 3, 2025.
See what other customers who have flown with Air Tahiti Nui, China Airlines, and Singapore Airlines from Idaho to Australia have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
64 reviews

Comfort

8.1

Boarding

8.7

Entertainment

7.3

Overall

8.7

Crew

9.0

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

Comfort

8.1

Boarding

8.7

Entertainment

7.3

Overall

8.7

Crew

9.0

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.
China Airlines
8.3
Very good
747 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Comfort

8.1

Boarding

8.7

Entertainment

7.3

Overall

8.7

Crew

9.0

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
1,320 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Comfort

8.1

Boarding

8.7

Entertainment

7.3

Overall

8.7

Crew

9.0

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

Comfort

8.1

Boarding

8.7

Entertainment

7.3

Overall

8.7

Crew

9.0

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
7,970 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Comfort

8.1

Boarding

8.7

Entertainment

7.3

Overall

8.7

Crew

9.0

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.

  • 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, February is the cheapest month in which you can book a flight from Idaho to Australia (average of $1,040). Flying from Idaho to Australia in December is currently the most expensive (average of $1,630). 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 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 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$926Average$1,354FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$987Average$1,296FlexibilityNo cancel feeOn-time71%

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