HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$585+ 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 6/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Jul 6 — Jul 131
Mon 7/6
Mon 7/13
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

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 6, 2026.

This FlightHub deal was found by Cheapflights users on 6/4. 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.
Sun 11/17:02 am
GEG
-
BNE
2 stops31h 43m
Air Canada
Mon 11/910:45 am
BNE
-
GEG
2 stops30h 53m
Air Canada
Deal found 6/4$1,136
This oojo deal was found by Cheapflights users on 6/4. 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.
Sun 11/15:05 pm
GEG
-
BNE
1 stop18h 45m
Multiple Airlines
Mon 11/99:15 am
BNE
-
GEG
1 stop29h 40m
Multiple Airlines
Deal found 6/4$1,137
This Travelocity deal was found by Cheapflights users on 6/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am
GEG
-
SYD
2 stops32h 20m
Air Canada
Wed 11/411:20 am
SYD
-
GEG
2 stops31h 18m
Air Canada
Deal found 6/1$1,138
This FlightHub deal was found by Cheapflights users on 6/1. 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.
Tue 7/2812:49 pm
GEG
-
SYD
1 stop25h 06m
Qantas Airways
Tue 8/1112:00 pm
SYD
-
GEG
1 stop25h 42m
Qantas Airways
Deal found 6/1$1,144
This Expedia deal was found by Cheapflights users on 6/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/102:05 pm
BOI
-
SYD
2 stops25h 15m
Air Canada
Fri 8/149:20 am
SYD
-
BOI
2 stops40h 14m
Air Canada
Deal found 6/1$1,147
This Qantas Airways deal was found by Cheapflights users on 6/3. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/51:50 pm
GEG
-
SYD
1 stop23h 35m
Qantas Airways
Fri 6/125:30 pm
SYD
-
GEG
2 stops21h 45m
Qantas Airways
Deal found 6/3$1,149
This Justfly.com deal was found by Cheapflights users on 6/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 am
GEG
-
BNE
2 stops56h 05m
Air Canada
Fri 10/910:00 am
BNE
-
GEG
2 stops53h 16m
Air Canada
Deal found 6/3$1,150
This United Airlines deal was found by Cheapflights users on 6/1. 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.
Tue 7/281:41 pm
GEG
-
SYD
2 stops24h 19m
United Airlines
Tue 8/1110:20 am
SYD
-
GEG
1 stop25h 31m
United Airlines
Deal found 6/1$1,159
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/293:20 pm
GEG
-
SYD
2 stops22h 45m
American Airlines
Wed 8/1212:00 pm
SYD
-
GEG
1 stop25h 42m
American Airlines
Deal found 6/1$1,160
This KAYAK deal was found by Cheapflights users on 6/1. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/281:41 pm
GEG
-
SYD
2 stops24h 19m
Air New Zealand
Tue 8/119:30 am
SYD
-
GEG
2 stops22h 36m
Air New Zealand
Deal found 6/1$1,163
This KAYAK deal was found by Cheapflights users on 6/1. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2912:37 pm
GEG
-
SYD
1 stop25h 18m
Air New Zealand
Wed 8/1210:20 am
SYD
-
GEG
1 stop29h 16m
Air New Zealand
Deal found 6/1$1,166
This FlightHub deal was found by Cheapflights users on 6/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:30 am
BOI
-
SYD
2 stops32h 50m
Air Canada
Mon 8/319:20 am
SYD
-
BOI
2 stops40h 15m
Air Canada
Deal found 6/3$1,178

Find 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 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,136
(FlightHub)

One-way from

$586
(Air Canada)

Popular in

December

Cheapest in

March

Average price

$1,346
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. 9% potential increase in price ($131 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 6, 2026.
Use the filters below to find and compare flights from Idaho to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 12/2

4:47 pm-6:10 am

1 stop18h 23m

Sydney Kingsford Smith

Wed 12/16

2:45 pm-5:21 pm

2 stops45h 36m

$1,149

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Fri 10/2

6:00 am-7:05 am

2 stops56h 05m

Brisbane

Fri 10/9

10:00 am-10:16 pm

2 stops53h 16m

$1,150

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 7/29

1:41 pm-6:55 am

2 stops24h 14m

Sydney Kingsford Smith

Wed 8/12

9:30 am-8:46 pm

2 stops28h 16m

$1,163

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 12/2

4:47 pm-6:10 am

1 stop18h 23m

Sydney Kingsford Smith

Tue 12/15

8:30 am-8:57 pm

2 stops31h 27m

$1,207

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 10/22

2:51 pm-8:05 am

1 stop23h 14m

Sydney Kingsford Smith

Sun 11/1

2:05 pm-9:55 pm

1 stop25h 50m

$1,212

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 11/1

7:02 am-9:35 am

2 stops31h 33m

Sydney Kingsford Smith

Sat 11/21

11:20 am-12:40 pm

2 stops44h 20m

$1,221

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Wed 11/4

12:30 pm-7:30 am

1 stop25h 00m

Brisbane

Sun 11/8

11:40 am-11:24 am

1 stop17h 44m

$1,227

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 12/2

12:30 pm-9:15 am

1 stop25h 45m

Sydney Kingsford Smith

Tue 12/15

12:10 pm-11:24 am

1 stop18h 14m

$1,229

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 11/1

12:30 pm-9:15 am

1 stop25h 45m

Sydney Kingsford Smith

Sat 11/21

12:10 pm-11:24 am

1 stop18h 14m

$1,229

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 10/22

1:37 pm-8:00 am

2 stops24h 23m

Sydney Kingsford Smith

Sun 11/1

12:10 pm-12:24 pm

1 stop18h 14m

$1,229

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

Showing 1-10 of 36 resultsSorted by cheapest first
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 18h 23m. Fly via Qantas Airways, Air Canada, or Air New Zealand 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.

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 June 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$966Average$1,383FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$967Average$1,161FlexibilityNo cancel feeOn-time71%

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.