HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$557+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$864
(Qantas Airways)

One-way from

$557
(Kiwi.com)

Popular in

December

Cheapest in

September
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. 12% potential increase in price ($176 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($23 potential savings vs. average RT price).
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 January 8, 2026.

This Qantas Airways deal was found by Cheapflights users on 1/5. 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 3/33:45 pmGEG - SYD
1 stop19h 25mQantas Airways
Tue 3/1011:20 amSYD - GEG
1 stop24h 23mQantas Airways
Deal found 1/5$864
This Qantas Airways deal was found by Cheapflights users on 1/6. 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.
Fri 4/106:12 pmGEG - SYD
1 stop20h 18mMultiple Airlines
Sat 4/185:50 pmSYD - GEG
1 stop22h 02mMultiple Airlines
Deal found 1/6$865
This American Airlines deal was found by Cheapflights users on 1/5. 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.
Fri 2/203:10 pmGEG - SYD
2 stops22h 50mAmerican Airlines
Fri 2/275:45 pmSYD - GEG
2 stops24h 29mAmerican Airlines
Deal found 1/5$869
This American Airlines deal was found by Cheapflights users on 1/6. 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.
Fri 4/103:15 pmGEG - SYD
2 stops23h 15mAmerican Airlines
Sat 4/185:50 pmSYD - GEG
2 stops22h 19mAmerican Airlines
Deal found 1/6$870
This United Airlines deal was found by Cheapflights users on 1/5. 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.
Fri 2/207:00 amGEG - SYD
1 stop28h 20mUnited Airlines
Fri 2/272:00 pmSYD - GEG
1 stop26h 07mUnited Airlines
Deal found 1/5$881
This United Airlines deal was found by Cheapflights users on 1/7. 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 4/91:43 pmGEG - SYD
2 stops24h 17mUnited Airlines
Thu 4/1610:20 amSYD - GEG
2 stops27h 51mUnited Airlines
Deal found 1/7$885
This Expedia deal was found by Cheapflights users on 1/6. 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.
Wed 5/66:14 pmGEG - SYD
1 stop19h 51mMultiple Airlines
Wed 5/275:50 pmSYD - GEG
1 stop21h 46mMultiple Airlines
Deal found 1/6$890
This United Airlines deal was found by Cheapflights users on 1/7. 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.
Wed 4/84:01 pmGEG - SYD
2 stops45h 54mUnited Airlines
Thu 4/169:30 amSYD - GEG
2 stops28h 41mUnited Airlines
Deal found 1/7$899
This United Airlines deal was found by Cheapflights users on 1/7. 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 4/512:35 pmGEG - SYD
1 stop25h 20mUnited Airlines
Thu 4/1610:20 amSYD - GEG
1 stop18h 23mUnited Airlines
Deal found 1/7$901
This FlightHub deal was found by Cheapflights users on 1/7. 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.
Tue 3/33:45 pmGEG - SYD
1 stop19h 25mQantas Airways
Wed 3/1111:20 amSYD - GEG
1 stop24h 23mQantas Airways
Deal found 1/7$902
This American Airlines deal was found by Cheapflights users on 1/6. 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 5/63:15 pmGEG - SYD
2 stops22h 50mAmerican Airlines
Wed 5/275:50 pmSYD - GEG
2 stops22h 16mAmerican Airlines
Deal found 1/6$909
This oojo deal was found by Cheapflights users on 1/7. 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 3/106:58 amGEG - BNE
1 stop29h 02mMultiple Airlines
Thu 3/196:55 pmBNE - GEG
2 stops39h 37mMultiple Airlines
Deal found 1/7$1,097

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 January 8, 2026.
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

Fri 4/10

6:12 pm-7:30 am

1 stop20h 18m

Sydney Kingsford Smith

Sat 4/18

5:50 pm-10:52 pm

1 stop22h 02m

$865

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 2/20

3:10 pm-9:00 am

2 stops22h 50m

Sydney Kingsford Smith

Fri 2/27

5:45 pm-11:14 pm

2 stops24h 29m

$869

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 4/9

12:35 pm-6:55 am

1 stop25h 20m

Sydney Kingsford Smith

Thu 4/16

10:20 am-11:43 am

1 stop18h 23m

$881

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 2/20

7:00 am-6:20 am

1 stop28h 20m

Sydney Kingsford Smith

Fri 2/27

2:00 pm-9:07 pm

1 stop26h 07m

$881

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 4/10

12:35 pm-6:55 am

1 stop25h 20m

Sydney Kingsford Smith

Thu 4/16

10:20 am-11:43 am

1 stop18h 23m

$881

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 2/21

12:38 pm-9:15 am

1 stop25h 37m

Sydney Kingsford Smith

Sat 2/28

12:10 pm-11:45 am

1 stop18h 35m

$881

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 4/11

5:05 am-6:55 am

2 stops32h 50m

Sydney Kingsford Smith

Thu 4/16

9:30 am-9:11 pm

2 stops28h 41m

$885

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Wed 4/15

6:12 pm-10:55 am

2 stops23h 43m

Brisbane

Wed 5/20

8:35 pm-10:36 pm

1 stop19h 01m

$1,100

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Tue 3/10

3:45 pm-5:30 pm

2 stops32h 45m

Brisbane

Thu 3/19

7:40 pm-5:32 pm

2 stops38h 52m

$1,101

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Wed 4/15

1:43 pm-6:30 am

2 stops23h 47m

Brisbane

Wed 5/20

10:30 am-9:09 pm

2 stops27h 39m

$1,115

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 31 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.

Cheapflights Insights

Everything you need to know about your flight from Idaho to Australia
No data available for this route at this time. Please check back soon.

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 22h 50m. Fly via American Airlines, United Airlines, or Qantas Airways to get the fastest option. The distance from Idaho to Australia is about 7951 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.

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 Auckland flights
Los Angeles to Melbourne flights
Los Angeles to Papeete flights
San Francisco to Auckland flights
Dallas/Fort Worth to Sydney flights
San Francisco to Sydney flights
John F Kennedy Intl to Sydney flights
John F Kennedy Intl to Auckland flights
Dallas/Fort Worth to Auckland flights
Newark to Sydney flights
Dallas/Fort Worth to Melbourne flights
San Francisco to Papeete flights
San Francisco to Melbourne flights
LaGuardia to Sydney flights
Los Angeles to Brisbane flights
John F Kennedy Intl to Melbourne flights
O'Hare Intl to Auckland flights
Honolulu to Sydney flights
Dulles Intl to Sydney flights
Hobby to Sydney flights
Newark to Melbourne flights
Ontario to Auckland flights
Seattle to Auckland flights
Seattle to Sydney flights
Ontario to Sydney flights
O'Hare Intl to Sydney flights
Seattle to Melbourne flights
Hobby to Auckland flights
Santa Ana to Auckland flights
Newark to Auckland flights
Boston to Sydney flights
Boston to Auckland flights
Santa Ana to Sydney flights
LaGuardia to Auckland flights
Los Angeles to Nadi flights
LaGuardia to Melbourne flights
Denver to Auckland flights
George Bush Intcntl to Auckland flights
O'Hare Intl to Melbourne flights
George Bush Intcntl to Sydney flights
Hobby to Melbourne flights
Dulles Intl to Melbourne flights
Dulles Intl to Auckland flights
Atlanta to Sydney flights
Tampa to Melbourne flights
Dallas/Fort Worth to Avalon flights
Baltimore to Sydney flights
Reagan-National to Sydney flights
Baltimore to Auckland 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$864Average$1,082FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$947Average$1,347FlexibilityNo cancel feeOn-time69%

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.