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$744+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
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 agosto 14, 2025.

Round-trip from

$956
(American Airlines)

One-way from

$744
(Qantas Airways)

Popular in

January

Cheapest in

May

Average price

$1,207
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. 12% potential increase in price ($179 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in August 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 agosto 14, 2025.

This American Airlines deal was found by Cheapflights users on 8/13. 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.
sáb. 9/271:38 pmBOI - SYD
2 stops25h 27mAmerican Airlines
sáb. 10/49:10 amSYD - BOI
2 stops26h 52mAmerican Airlines
Deal found 8/13$956
This American Airlines deal was found by Cheapflights users on 8/14. 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.
mié. 11/192:06 pmBOI - SYD
2 stops24h 54mAmerican Airlines
mié. 2/1811:15 amSYD - BOI
2 stops23h 36mAmerican Airlines
Deal found 8/14$1,016
This American Airlines deal was found by Cheapflights users on 8/13. 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.
jue. 12/42:16 pmBOI - SYD
2 stops23h 09mAmerican Airlines
mié. 12/1011:15 amSYD - BOI
2 stops23h 37mAmerican Airlines
Deal found 8/13$1,112
This American Airlines deal was found by Cheapflights users on 8/14. 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.
dom. 11/162:06 pmBOI - SYD
2 stops24h 54mAmerican Airlines
dom. 2/152:20 pmSYD - BOI
1 stop24h 49mAmerican Airlines
Deal found 8/14$1,142
This Delta deal was found by Cheapflights users on 8/14. 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.
mar. 12/301:15 pmBOI - SYD
2 stops23h 35mDelta
dom. 2/1510:40 amSYD - BOI
2 stops31h 41mDelta
Deal found 8/14$1,182
This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
dom. 11/166:58 pmBOI - SYD
1 stop20h 02mAlaska Airlines
dom. 2/1511:15 amSYD - BOI
1 stop18h 49mAlaska Airlines
Deal found 8/14$1,212
This United Airlines deal was found by Cheapflights users on 8/14. 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.
mar. 12/306:55 pmBOI - SYD
1 stop20h 20mUnited Airlines
dom. 2/152:00 pmSYD - BOI
1 stop20h 31mUnited Airlines
Deal found 8/14$1,278
This Delta deal was found by Cheapflights users on 8/13. 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.
sáb. 9/2711:43 amBOI - SYD
2 stops26h 52mDelta
sáb. 10/49:25 amSYD - BOI
1 stop21h 39mDelta
Deal found 8/13$1,282
This United Airlines deal was found by Cheapflights users on 8/13. 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.
jue. 12/42:20 pmBOI - SYD
1 stop24h 55mUnited Airlines
mié. 12/1012:10 pmSYD - BOI
1 stop21h 53mUnited Airlines
Deal found 8/13$1,328

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 agosto 14, 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

sáb. 9/27

1:38 pm-7:05 am

2 stops25h 27m

Sydney Kingsford Smith

sáb. 10/4

9:10 am-8:02 pm

2 stops26h 52m

$956

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mié. 11/19

2:06 pm-9:00 am

2 stops24h 54m

Sydney Kingsford Smith

mié. 2/18

11:15 am-1:15 pm

2 stops20h 00m

$1,016

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

jue. 12/4

2:16 pm-7:25 am

2 stops23h 09m

Sydney Kingsford Smith

mié. 12/10

11:15 am-4:52 pm

2 stops23h 37m

$1,112

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

dom. 11/16

2:06 pm-9:00 am

2 stops24h 54m

Sydney Kingsford Smith

dom. 2/15

2:20 pm-9:09 pm

1 stop24h 49m

$1,142

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 12/30

5:59 am-6:50 am

2 stops30h 51m

Sydney Kingsford Smith

dom. 2/15

10:40 am-6:25 pm

2 stops25h 45m

$1,182

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

mié. 2/4

9:00 am-10:55 am

2 stops32h 25m

Adelaide

mié. 2/25

11:55 am-10:59 pm

2 stops28h 34m

$1,182

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

lun. 2/2

2:11 pm-10:55 am

2 stops27h 14m

Adelaide

sáb. 2/21

7:00 pm-1:30 pm

2 stops36h 00m

$1,366

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

lun. 2/2

1:00 pm-9:30 am

1 stop27h 00m

Adelaide

sáb. 2/21

2:55 pm-4:31 pm

1 stop19h 06m

$1,464

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

mié. 2/4

2:43 pm-9:30 am

2 stops49h 17m

Adelaide

mié. 2/25

2:55 pm-4:31 pm

1 stop19h 06m

$1,486

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

lun. 2/2

7:30 am-8:50 am

3 stops55h 50m

Adelaide

sáb. 2/21

6:35 pm-1:45 pm

2 stops36h 40m

$1,955

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 14 results
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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, February is the cheapest month in which you can book a flight from Boise to Australia (average of $1,031). Flying from Boise to Australia in December is currently the most expensive (average of $1,619). 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 agosto 14, 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.

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 agosto 14, 2025.
Peruse reviews from past customers who have flown with United Airlines and American Airlines from Boise to Australia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,916 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,916 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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, February is the cheapest month in which you can book a flight from Boise to Australia (average of $1,031). Flying from Boise to Australia in December is currently the most expensive (average of $1,619). 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

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Top 2 airlines flying from Boise to Australia

Discover the top 2 airlines 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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$872Average$1,296FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$987Average$1,296FlexibilityNo cancel feeOn-time71%

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