HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$1,107+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,154
(Alaska Airlines)

Popular in

December

Cheapest in

May

Average price

$1,195
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
Highest demand for flights based on searches. 16% potential increase in price ($283 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($75 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 31, 2025.

This Jetabroad deal was found by Cheapflights users on 3/31. 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.
Sat 9/67:14 pmBOI - SYD
2 stops27h 26mMultiple Airlines
Sat 9/201:45 pmSYD - BOI
2 stops25h 09mMultiple Airlines
Deal found 3/31$1,107
This Alaska Airlines deal was found by Cheapflights users on 3/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/102:44 pmBOI - SYD
2 stops24h 21mAlaska Airlines
Thu 8/219:10 amSYD - BOI
1 stop26h 28mAlaska Airlines
Deal found 3/30$1,154
This Alaska Airlines deal was found by Cheapflights users on 3/31. 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 7/311:23 pmGEG - SYD
2 stops24h 42mAlaska Airlines
Sat 8/169:10 amSYD - GEG
2 stops31h 49mAlaska Airlines
Deal found 3/31$1,154
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/83:29 pmGEG - BNE
1 stop22h 01mUnited Airlines
Wed 7/910:30 amBNE - GEG
1 stop21h 17mUnited Airlines
Deal found 3/30$1,253
This Delta deal was found by Cheapflights users on 3/31. 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.
Mon 7/212:32 pmGEG - SYD
1 stop23h 03mDelta
Mon 7/289:25 amSYD - GEG
1 stop21h 25mDelta
Deal found 3/31$1,265
This Justfly.com deal was found by Cheapflights users on 3/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/107:10 amGEG - BNE
1 stop29h 15mQantas Airways
Tue 7/88:05 pmBNE - GEG
1 stop38h 42mQantas Airways
Deal found 3/30$1,272
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1412:35 pmGEG - SYD
1 stop25h 20mUnited Airlines
Thu 9/2510:20 amSYD - GEG
1 stop19h 49mUnited Airlines
Deal found 3/30$1,306
This Gurufare deal was found by Cheapflights users on 3/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/16:49 pmGEG - SYD
1 stop19h 16mQantas Airways
Sat 7/199:10 amSYD - GEG
1 stop25h 37mQantas Airways
Deal found 3/30$1,314
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Tue 12/302:17 pmBOI - SYD
2 stops23h 08mAmerican Airlines
Sun 2/152:30 pmSYD - BOI
1 stop24h 39mAmerican Airlines
Deal found 3/31$1,327
This Travelocity deal was found by Cheapflights users on 3/30. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/117:10 amGEG - BNE
1 stop29h 15mMultiple Airlines
Wed 7/98:05 pmBNE - GEG
1 stop19h 20mMultiple Airlines
Deal found 3/30$1,331
This Orbitz deal was found by Cheapflights users on 3/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:40 amGEG - SYD
2 stops34h 50mMultiple Airlines
Tue 12/302:10 pmSYD - GEG
2 stops27h 23mMultiple Airlines
Deal found 3/30$1,397
This Gurufare deal was found by Cheapflights users on 3/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/305:00 amGEG - PER
2 stops27h 55mSingapore Airlines
Wed 11/121:10 amPER - GEG
2 stops25h 50mSingapore Airlines
Deal found 3/30$1,424

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 March 31, 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

1:23 pm-7:05 am

2 stops24h 42m

Sydney Kingsford Smith

Sat 8/16

9:10 am-11:59 pm

2 stops31h 49m

$1,154

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Sun 6/8

3:29 pm-6:30 am

1 stop22h 01m

Brisbane

Wed 7/9

10:30 am-2:47 pm

1 stop21h 17m

$1,253

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 7/21

2:32 pm-6:35 am

1 stop23h 03m

Sydney Kingsford Smith

Mon 7/28

9:25 am-1:50 pm

1 stop21h 25m

$1,265

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Tue 6/10

7:10 am-5:25 am

1 stop29h 15m

Brisbane

Tue 7/8

8:05 pm-5:47 pm

1 stop38h 42m

$1,272

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 5/15

1:00 pm-12:15 pm

2 stops31h 15m

Sydney Kingsford Smith

Thu 5/22

4:20 pm-9:16 pm

2 stops20h 56m

$1,287

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 9/14

12:35 pm-6:55 am

1 stop25h 20m

Sydney Kingsford Smith

Thu 9/25

10:20 am-1:09 pm

1 stop19h 49m

$1,306

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 7/1

6:49 pm-7:05 am

1 stop19h 16m

Sydney Kingsford Smith

Sat 7/19

9:10 am-5:47 pm

1 stop25h 37m

$1,314

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Wed 6/11

7:10 am-5:25 am

1 stop29h 15m

Brisbane

Wed 7/9

8:05 pm-10:25 pm

1 stop19h 20m

$1,331

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 4/3

6:00 am-7:45 pm

2 stops20h 45m

Sydney Kingsford Smith

Sat 4/5

9:40 pm-1:52 pm

1 stop33h 12m

$1,361

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 4/27

1:10 pm-6:35 am

1 stop25h 25m

Sydney Kingsford Smith

Fri 5/9

9:25 am-2:59 pm

1 stop21h 34m

$1,565

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 26 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 $1,046). 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 March 31, 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 March 31, 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
61 reviews

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Overall

8.7

Comfort

8.0

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

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Overall

8.7

Comfort

8.0

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
1,286 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Overall

8.7

Comfort

8.0

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
9,818 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Overall

8.7

Comfort

8.0

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
7,899 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Overall

8.7

Comfort

8.0

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
7.9
Good
456 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Overall

8.7

Comfort

8.0

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 $1,046). 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 Papeete flights
Los Angeles to Melbourne flights
Dallas/Fort Worth to Sydney flights
John F Kennedy Intl to Sydney flights
Los Angeles to Auckland flights
San Francisco to Sydney flights
Newark to Sydney flights
San Francisco to Melbourne flights
Dulles Intl to Sydney flights
San Francisco to Auckland flights
LaGuardia to Sydney flights
Los Angeles to Brisbane flights
Dulles Intl to Melbourne flights
San Francisco to Papeete flights
Reagan-National to Melbourne flights
John F Kennedy Intl to Melbourne flights
John F Kennedy Intl to Auckland flights
Reagan-National to Sydney flights
Seattle to Sydney flights
Los Angeles to Nadi flights
O'Hare Intl to Sydney flights
Baltimore to Sydney flights
Dallas/Fort Worth to Melbourne flights
Hobby to Melbourne flights
Honolulu to Sydney flights
Ontario to Sydney flights
Santa Ana to Sydney flights
Boston to Sydney flights
Atlanta to Sydney flights
Hobby to Sydney flights
Newark to Melbourne flights
Baltimore to Melbourne flights
San Francisco to Nadi flights
Seattle to Melbourne flights
Denver to Sydney flights
George Bush Intcntl to Melbourne flights
Newark to Auckland flights
LaGuardia to Melbourne flights
Minneapolis to Sydney flights
Seattle to Auckland flights
Dallas/Fort Worth to Auckland flights
Hobby to Auckland flights
George Bush Intcntl to Sydney flights
Los Angeles to Avalon flights
Los Angeles to Vaitape flights
Dulles Intl to Auckland flights
Orlando to Sydney flights
Seattle to Tamuning flights
Miami to Sydney flights

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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$872Average$1,371FlexibilityNo cancel feeOn-time69%
DeltaCheapest$965Average$1,641FlexibilityNo cancel feeOn-timeN/A
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.