HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$425+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
2月 26 — 3月 51
週三 2/26
週三 3/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho to Australia with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 2月 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$878
(United)

One-way from

$425
(United Airlines)

Popular in

December

Cheapest in

May

Average price

$1,292
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. 19% potential increase in price ($368 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($102 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 2月 21, 2025.

This Delta deal was found by Cheapflights users on 2/19. 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.
週四 10/167:15 amGEG - SYD
2 stops30h 20mDelta
週四 10/3010:05 amSYD - GEG
2 stops26h 43mDelta
Deal found 2/19$971
This United Airlines deal was found by Cheapflights users on 2/20. 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.
週五 8/151:37 pmGEG - SYD
2 stops48h 23mUnited Airlines
週三 8/2010:20 amSYD - GEG
1 stop19h 49mUnited Airlines
Deal found 2/20$1,119
This United deal was found by Cheapflights users on 2/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週日 5/43:25 pmGEG - BNE
1 stop22h 05mUnited Airlines
週六 5/176:55 amBNE - GEG
2 stops24h 46mUnited Airlines
Deal found 2/20$1,122
This Delta deal was found by Cheapflights users on 2/20. 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.
週四 3/137:15 amBOI - SYD
1 stop29h 50mDelta
週一 3/241:15 pmSYD - BOI
1 stop26h 35mDelta
Deal found 2/20$1,160
This United Airlines deal was found by Cheapflights users on 2/20. 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.
週六 5/244:35 pmBOI - SYD
1 stop22h 25mUnited Airlines
週六 5/3110:20 amSYD - BOI
1 stop27h 24mUnited Airlines
Deal found 2/20$1,223
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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.
週四 10/162:40 pmGEG - SYD
1 stop21h 55mAlaska Airlines
週四 10/305:25 pmSYD - GEG
1 stop23h 08mAlaska Airlines
Deal found 2/19$1,332
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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.
週四 8/712:44 pmGEG - BNE
2 stops23h 16mAlaska Airlines
週四 8/1410:00 pmBNE - GEG
1 stop32h 48mAlaska Airlines
Deal found 2/20$1,368
This Gurufare deal was found by Cheapflights users on 2/20. 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.
週二 8/57:00 amGEG - PER
2 stops49h 40mAir New Zealand
週五 8/228:05 amPER - GEG
2 stops44h 04mAir New Zealand
Deal found 2/20$1,397
This Expedia deal was found by Cheapflights users on 2/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 8/72:40 pmGEG - BNE
1 stop21h 20mMultiple Airlines
週四 8/1410:00 pmBNE - GEG
1 stop32h 48mMultiple Airlines
Deal found 2/20$1,443
This Travelocity deal was found by Cheapflights users on 2/20. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 8/152:40 pmGEG - SYD
1 stop23h 25mMultiple Airlines
週三 8/205:35 pmSYD - GEG
1 stop21h 58mMultiple Airlines
Deal found 2/20$1,514
This Jetabroad deal was found by Cheapflights users on 2/20. 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.
週二 8/512:44 pmGEG - PER
3 stops36h 16mMultiple Airlines
週五 8/228:05 amPER - GEG
2 stops29h 28mMultiple Airlines
Deal found 2/20$1,531
This Jetabroad deal was found by Cheapflights users on 2/20. 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.
週四 8/76:00 amGEG - BNE
3 stops33h 30mHawaiian Airlines
週四 8/146:05 pmBNE - GEG
3 stops22h 54mHawaiian Airlines
Deal found 2/20$1,537

Find flights from Idaho to Australia within your budget

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 2月 21, 2025.

Fly from

Idaho

Fly to

Australia

Route

Depart

Return

Price

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

週五 8/15

1:37 pm-7:00 am

2 stops48h 23m

Sydney Kingsford Smith

週三 8/20

10:20 am-1:09 pm

1 stop19h 49m

$1,119

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

週四 7/31

1:30 pm-6:35 am

1 stop24h 05m

Sydney Kingsford Smith

週六 8/16

9:25 am-12:11 pm

1 stop19h 46m

$1,120

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

週日 5/4

3:25 pm-6:30 am

1 stop22h 05m

Brisbane

週六 5/17

6:55 am-2:41 pm

2 stops24h 46m

$1,122

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

週四 3/13

7:15 am-6:05 am

1 stop29h 50m

Sydney Kingsford Smith

週一 3/24

1:15 pm-10:50 pm

1 stop26h 35m

$1,160

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

週六 5/24

4:35 pm-7:00 am

1 stop22h 25m

Sydney Kingsford Smith

週六 5/31

10:20 am-9:44 pm

1 stop27h 24m

$1,223

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

週四 8/7

12:44 pm-5:00 am

2 stops23h 16m

Brisbane

週四 8/14

10:00 pm-1:48 pm

1 stop32h 48m

$1,368

SpokanePerth

GEG - PER

GEGPER

Spokane

週二 8/5

7:00 am-11:40 pm

2 stops49h 40m

Perth

週五 8/22

8:05 am-1:09 pm

2 stops44h 04m

$1,397

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

週四 8/7

2:40 pm-5:00 am

1 stop21h 20m

Brisbane

週四 8/14

10:00 pm-1:48 pm

1 stop32h 48m

$1,443

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

週五 8/15

2:40 pm-7:05 am

1 stop23h 25m

Sydney Kingsford Smith

週三 8/20

5:35 pm-10:33 pm

1 stop21h 58m

$1,514

SpokanePerth

GEG - PER

GEGPER

Spokane

週二 8/5

12:44 pm-4:00 pm

3 stops36h 16m

Perth

週五 8/22

8:05 am-10:33 pm

2 stops29h 28m

$1,531

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 32 results
1
2
3
4

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.

Travel insights for flights from Idaho to Australia

Get recent, data-driven insights about flights from Idaho to Australia including ideal travel times, pricing trends, and more.

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 $1,051). Flying from Idaho to Australia in December is currently the most expensive (average of $1,643). 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 2月 21, 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 2月 21, 2025.
To help decide which airline to fly from Idaho to Australia, see what other customers have to say about Air Tahiti Nui, ANA 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
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

8.7

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
61 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

8.7

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.

ANA
8.4
Very good
836 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

8.7

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
9,697 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

8.7

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
8,219 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

8.7

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.

Hawaiian Airlines
7.9
Good
2,315 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

8.7

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 $425 on United Airlines. Other airlines that offer cheap prices include American Airlines from $428 and Delta from $529 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, February is the cheapest month in which you can book a flight from Idaho to Australia (average of $1,051). Flying from Idaho to Australia in December is currently the most expensive (average of $1,643). 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.

Alternative routes for Idaho to Australia

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Sydney flights
Los Angeles to Melbourne flights
Dallas/Fort Worth to Sydney flights
Los Angeles to Auckland flights
Los Angeles to Papeete flights
John F Kennedy Intl to Sydney flights
Newark to Sydney flights
Dulles Intl to Sydney flights
San Francisco to Melbourne flights
San Francisco to Papeete flights
LaGuardia to Sydney flights
San Francisco to Sydney flights
Dallas/Fort Worth to Melbourne flights
Reagan-National to Sydney flights
John F Kennedy Intl to Auckland flights
San Francisco to Auckland flights
Baltimore to Sydney flights
Los Angeles to Nadi flights
Seattle to Sydney flights
John F Kennedy Intl to Melbourne flights
Dallas/Fort Worth to Nadi flights
Boston to Sydney flights
Los Angeles to Brisbane flights
O'Hare Intl to Sydney flights
Ontario to Sydney flights
Seattle to Auckland flights
Hobby to Melbourne flights
Hobby to Sydney flights
Newark to Melbourne flights
Atlanta to Sydney flights
Santa Ana to Sydney flights
Denver to Sydney flights
Dallas/Fort Worth to Auckland flights
Honolulu to Sydney flights
O'Hare Intl to Melbourne flights
LaGuardia to Melbourne flights
George Bush Intcntl to Sydney flights
Newark to Auckland flights
Minneapolis to Sydney flights
Ontario to Papeete flights
Dulles Intl to Melbourne flights
LaGuardia to Auckland flights
Seattle to Melbourne flights
San Francisco to Brisbane flights
Los Angeles to Avalon flights
San Francisco to Nadi flights
Denver to Auckland flights
Miami to Sydney flights
George Bush Intcntl to Melbourne flights
Hobby to Auckland flights

Top 3 airlines flying from Idaho to Australia

Discover the top 3 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 2月 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$872Average$1,384FlexibilityNo cancel feeOn-time69%
DeltaCheapest$1,059Average$1,641FlexibilityNo cancel feeOn-timeN/A
Air New ZealandCheapest$1,300Average$1,418FlexibilityNo cancel feeOn-time78%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.