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$424+ Cheap flights from Boise (BOI) 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Boise to Australia

Keep the following information in mind while searching for Boise to Australia flight deals. Data was last updated June 12, 2025.

Round-trip from

$944
(American Airlines)

One-way from

$424
(American Airlines)

Popular in

December

Cheapest in

May

Average price

$1,357
From Boise Air Term. Gowen Fld to Australia
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One-way flight from Boise Air Term. Gowen Fld to Australia
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Highest demand for flights based on searches. 23% potential increase in price ($426 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($109 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Boise to Australia

Cheapest flights from Boise to Australia
Explore the most affordable flight options available from Boise to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 7/263:35 pmBOI - SYD
1 stop23h 20mAmerican Airlines
Sat 8/29:10 amSYD - BOI
2 stops29h 16mAmerican Airlines
Deal found 6/11$944
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/97:12 pmBOI - SYD
2 stops27h 28mMultiple Airlines
Fri 8/155:45 pmSYD - BOI
1 stop21h 09mMultiple Airlines
Deal found 6/9$1,159
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 11/138:08 amBOI - SYD
1 stop29h 17mAlaska Airlines
Mon 11/175:25 pmSYD - BOI
1 stop23h 37mAlaska Airlines
Deal found 6/10$1,238
This United Airlines deal was found by Cheapflights users on 6/10. 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 12/3010:39 amBOI - SYD
2 stops25h 41mUnited Airlines
Sun 2/1511:20 amSYD - BOI
1 stop20h 10mUnited Airlines
Deal found 6/10$1,365
This Justfly.com deal was found by Cheapflights users on 6/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/98:18 amBOI - SYD
1 stop30h 47mQantas Airways
Fri 8/159:10 amSYD - BOI
1 stop29h 44mQantas Airways
Deal found 6/9$1,489
This Gurufare deal was found by Cheapflights users on 6/9. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1310:50 amBOI - SYD
1 stop28h 05mAir New Zealand
Mon 12/159:55 amSYD - BOI
2 stops27h 46mAir New Zealand
Deal found 6/9$1,507
This Trip.com deal was found by Cheapflights users on 6/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/258:18 amBOI - ADL
2 stops35h 07mMultiple Airlines
Fri 8/111:55 amADL - BOI
2 stops26h 29mMultiple Airlines
Deal found 6/9$1,959
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:15 amBOI - SYD
3 stops33h 20mAir Canada
Mon 11/1711:20 amSYD - BOI
2 stops28h 01mAir Canada
Deal found 6/10$1,977
This Ovago deal was found by Cheapflights users on 6/11. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:00 pmBOI - SYD
3 stops28h 40mAir Tahiti Nui
Sun 2/158:55 amSYD - BOI
2 stops32h 04mAir Tahiti Nui
Deal found 6/11$2,290
This Gotogate deal was found by Cheapflights users on 6/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/254:40 pmBOI - ADL
2 stops26h 45mAir New Zealand
Fri 8/16:00 amADL - BOI
3 stops28h 41mAir New Zealand
Deal found 6/9$2,381
This Gotogate deal was found by Cheapflights users on 6/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/251:00 pmBOI - ADL
3 stops50h 10mQatar Airways
Fri 8/111:40 amADL - BOI
3 stops50h 44mQatar Airways
Deal found 6/9$2,957

Cheapflights Fare Finder

Customize your flight search to find flights from Boise 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 12, 2025.
Use the filters below to find and compare flights from Boise to Australia that are best for you.

Fly from

Boise

Fly to

Australia

Route

Depart

Return

Price

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 7/26

3:35 pm-6:55 am

1 stop23h 20m

Sydney Kingsford Smith

Sat 8/2

9:10 am-10:26 pm

2 stops29h 16m

$944

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 8/9

7:12 pm-2:40 pm

2 stops27h 28m

Sydney Kingsford Smith

Fri 8/15

5:45 pm-10:54 pm

1 stop21h 09m

$1,159

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 11/13

8:08 am-7:25 am

1 stop29h 17m

Sydney Kingsford Smith

Mon 11/17

5:25 pm-11:02 pm

1 stop23h 37m

$1,238

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 8/9

8:18 am-7:05 am

1 stop30h 47m

Sydney Kingsford Smith

Fri 8/15

9:10 am-10:54 pm

1 stop29h 44m

$1,489

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 7/13

10:50 am-6:55 am

1 stop28h 05m

Sydney Kingsford Smith

Mon 12/15

9:55 am-7:41 pm

2 stops27h 46m

$1,507

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 7/13

10:50 am-6:55 am

1 stop28h 05m

Sydney Kingsford Smith

Mon 12/15

12:10 pm-4:31 pm

1 stop22h 21m

$1,511

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

Fri 7/25

8:18 am-10:55 am

2 stops35h 07m

Adelaide

Fri 8/1

11:55 am-10:54 pm

2 stops26h 29m

$1,959

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 11/13

6:15 am-9:35 am

3 stops33h 20m

Sydney Kingsford Smith

Mon 11/17

11:20 am-9:21 pm

2 stops28h 01m

$1,977

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 10/24

8:26 pm-8:40 pm

3 stops31h 14m

Sydney Kingsford Smith

Wed 11/5

7:15 pm-11:02 pm

3 stops45h 47m

$2,314

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

Fri 7/25

4:40 pm-10:55 am

2 stops26h 45m

Adelaide

Fri 8/1

6:00 am-7:11 pm

3 stops28h 41m

$2,381

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 14 results
1
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Best time to book a flight from Boise to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Boise 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 Boise to Australia

What is the cheapest month to book a flight from Boise to Australia?

Currently, March is the cheapest month in which you can book a flight from Boise to Australia (average of $1,041). Flying from Boise to Australia in December is currently the most expensive (average of $1,635). 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 BOI to AU?

Find hourly flight availability from Boise 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 June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boise 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 June 12, 2025.
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

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
64 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

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
10,000 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

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
8.0
Very good
483 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

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.
Qantas Airways
7.5
Good
854 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

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.
Qatar Airways
7.4
Good
3,584 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Entertainment

7.3

Crew

9.0

Overall

8.7

Comfort

8.1

Boarding

8.7

Food

7.8

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 Boise to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boise to Australia?

    Most people fly from Boise Air Term. Gowen Fld (BOI) if they book a flight from Boise to Australia. Boise Air Term. Gowen Fld is conveniently located just 3.3 mi from Boise’s city center.

  • Can I find deals for flights from Boise to Australia that include hotel bookings?

    Yes. In addition to deals on Boise to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boise to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to Australia.

  • Can I find deals for business class flights from Boise to Australia?

    Yes. Cheapflights offers flight deals from Boise 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 Boise to Australia?

    Currently, March is the cheapest month in which you can book a flight from Boise to Australia (average of $1,041). Flying from Boise to Australia in December is currently the most expensive (average of $1,635). 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.

Top airline flying from Boise to Australia

Discover the top airline that operate flights from Boise 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$955Average$1,295FlexibilityNo cancel feeOn-time69%

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