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$477+ 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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
1 adult, Economy
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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 March 11, 2026.

This Bravofly deal was found by Cheapflights users on 3/9. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:14 pm
GEG
-
SYD
1 stop19h 51m
Qantas Airways
Thu 4/3012:00 pm
SYD
-
GEG
1 stop25h 33m
Qantas Airways
Deal found 3/9$952
This oojo deal was found by Cheapflights users on 3/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/111:51 am
GEG
-
SYD
1 stop26h 14m
Multiple Airlines
Wed 7/159:10 am
SYD
-
GEG
1 stop19h 01m
Multiple Airlines
Deal found 3/6$957
This oojo deal was found by Cheapflights users on 3/8. 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.
Wed 4/226:14 pm
GEG
-
SYD
1 stop20h 16m
Multiple Airlines
Wed 4/299:10 am
SYD
-
GEG
1 stop25h 22m
Multiple Airlines
Deal found 3/8$958
This oojo deal was found by Cheapflights users on 3/9. 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 11/15:47 pm
GEG
-
SYD
1 stop20h 13m
Multiple Airlines
Sat 11/2111:15 am
SYD
-
GEG
1 stop30h 10m
Multiple Airlines
Deal found 3/9$965
This FlightHub deal was found by Cheapflights users on 3/7. 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.
Thu 4/236:14 pm
GEG
-
SYD
1 stop19h 51m
Qantas Airways
Tue 5/512:00 pm
SYD
-
GEG
1 stop21h 55m
Qantas Airways
Deal found 3/7$971
This Qantas Airways deal was found by Cheapflights users on 3/9. 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 5/26:14 pm
GEG
-
SYD
1 stop19h 51m
Qantas Airways
Wed 5/69:10 am
SYD
-
GEG
1 stop25h 22m
Qantas Airways
Deal found 3/9$1,024
This United Airlines deal was found by Cheapflights users on 3/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/161:37 pm
GEG
-
SYD
2 stops24h 28m
United Airlines
Sun 3/2212:10 pm
SYD
-
GEG
1 stop17h 33m
United Airlines
Deal found 3/6$1,028
This American Airlines deal was found by Cheapflights users on 3/9. 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 11/13:05 pm
GEG
-
SYD
2 stops22h 55m
American Airlines
Sat 11/2111:15 am
SYD
-
GEG
2 stops21h 40m
American Airlines
Deal found 3/9$1,029
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Sat 5/25:00 am
GEG
-
SYD
2 stops33h 00m
United Airlines
Wed 5/610:20 am
SYD
-
GEG
1 stop17h 56m
United Airlines
Deal found 3/8$1,032
This FlightHub deal was found by Cheapflights users on 3/9. 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.
Wed 3/116:00 am
GEG
-
SYD
2 stops32h 15m
Qantas Airways
Thu 4/2312:00 pm
SYD
-
GEG
1 stop25h 33m
Qantas Airways
Deal found 3/9$1,065
This oojo deal was found by Cheapflights users on 3/7. 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 4/217:03 pm
BOI
-
SYD
2 stops21h 42m
Air New Zealand
Tue 4/287:50 am
SYD
-
BOI
2 stops31h 11m
Air New Zealand
Deal found 3/7$1,091
This American Airlines deal was found by Cheapflights users on 3/6. 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.
Sun 5/244:10 pm
BOI
-
SYD
1 stop22h 45m
American Airlines
Sun 6/712:00 pm
SYD
-
BOI
1 stop26h 49m
American Airlines
Deal found 3/6$1,113

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 March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$952
(Bravofly)

One-way from

$477
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$1,523
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. 4% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 11, 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 7/1

11:51 am-7:05 am

1 stop26h 14m

Sydney Kingsford Smith

Wed 7/15

9:10 am-11:11 am

1 stop19h 01m

$957

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 5/2

6:14 pm-7:05 am

1 stop19h 51m

Sydney Kingsford Smith

Wed 5/6

9:10 am-5:32 pm

1 stop25h 22m

$1,024

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 4/22

1:46 pm-7:00 am

2 stops24h 14m

Sydney Kingsford Smith

Wed 4/29

10:20 am-6:51 pm

1 stop25h 31m

$1,028

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 8/3

1:41 pm-7:00 am

2 stops24h 19m

Sydney Kingsford Smith

Sat 8/15

10:20 am-10:35 am

1 stop17h 15m

$1,028

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 8/3

3:00 pm-7:05 am

2 stops23h 05m

Sydney Kingsford Smith

Sat 8/15

9:10 am-11:02 pm

2 stops30h 52m

$1,029

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 5/2

5:00 am-6:55 am

2 stops32h 55m

Sydney Kingsford Smith

Wed 5/6

10:20 am-11:16 am

1 stop17h 56m

$1,032

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 5/24

2:05 pm-6:55 am

1 stop24h 50m

Sydney Kingsford Smith

Mon 6/8

10:20 am-4:44 pm

1 stop22h 24m

$1,116

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Sat 4/25

1:46 pm-6:30 am

2 stops47h 44m

Brisbane

Wed 4/29

10:30 am-6:51 pm

2 stops25h 21m

$1,134

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 5/22

9:16 pm-6:50 am

2 stops65h 34m

Sydney Kingsford Smith

Sun 6/7

9:15 am-3:01 pm

1 stop21h 46m

$1,135

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Tue 4/28

1:54 pm-11:55 am

2 stops29h 01m

Brisbane

Fri 5/8

8:45 am-8:33 pm

2 stops28h 48m

$1,193

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Showing 1-10 of 41 resultsSorted by cheapest first
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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 19h 51m. Fly via Qantas Airways, United Airlines, or Delta 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

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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 March 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$966Average$1,383FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$967Average$1,190FlexibilityNo cancel feeOn-time71%

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