HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$1,147+ Cheap flights from Boise (BOI) to Australia

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boise 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 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 December 9, 2025.

This Delta deal was found by Cheapflights users on 12/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:08 pmBOI - SYD
1 stop24h 22mDelta
Sun 2/1510:40 amSYD - BOI
2 stops25h 42mDelta
Deal found 12/8$1,275
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:10 pmBOI - SYD
1 stop22h 10mUnited Airlines
Sun 2/152:00 pmSYD - BOI
1 stop25h 11mUnited Airlines
Deal found 12/9$1,573
This Jetabroad deal was found by Cheapflights users on 12/8. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:45 amBOI - SYD
2 stops20h 00mHawaiian Airlines
Sun 12/149:40 pmSYD - BOI
2 stops29h 40mHawaiian Airlines
Deal found 12/8$2,101
This United Airlines deal was found by Cheapflights users on 12/8. 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.
Fri 12/1210:35 amBOI - SYD
1 stop25h 45mUnited Airlines
Sun 12/148:30 amSYD - BOI
2 stops33h 14mUnited Airlines
Deal found 12/8$2,182
This Ovago deal was found by Cheapflights users on 12/7. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:15 amBOI - SYD
3 stops43h 35mAir Tahiti Nui
Sun 2/158:55 amSYD - BOI
3 stops32h 05mAir Tahiti Nui
Deal found 12/7$2,670
This Qantas Airways deal was found by Cheapflights users on 12/8. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/122:20 pmBOI - SYD
1 stop21h 50mMultiple Airlines
Sun 12/149:25 pmSYD - BOI
1 stop18h 33mMultiple Airlines
Deal found 12/8$2,827
This Justfly.com deal was found by Cheapflights users on 12/8. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/121:17 pmBOI - SYD
2 stops31h 33mQantas Airways
Sun 12/145:45 pmSYD - BOI
2 stops47h 20mQantas Airways
Deal found 12/8$2,918
This Air Tahiti Nui deal was found by Cheapflights users on 12/9. 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 Air Tahiti Nui is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:15 amBOI - SYD
3 stops43h 35mMultiple Airlines
Sun 2/158:55 amSYD - BOI
3 stops45h 49mMultiple Airlines
Deal found 12/9$3,381

Find flight deals from Boise to Australia

Keep the following information in mind while searching for Boise to Australia flight deals. Data was last updated December 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,147
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$1,459
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 Boise Air Term. Gowen Fld to Australia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($139 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 December 2025
Search Deals

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 December 9, 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

Mon 2/9

7:20 am-6:55 am

1 stop29h 35m

Sydney Kingsford Smith

Wed 2/18

2:05 pm-10:36 pm

1 stop26h 31m

$1,147

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 1/22

2:48 pm-9:00 am

2 stops24h 12m

Sydney Kingsford Smith

Thu 1/29

11:20 am-5:15 pm

2 stops23h 55m

$1,250

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 2/5

7:02 pm-9:00 am

1 stop19h 58m

Sydney Kingsford Smith

Mon 2/9

11:20 am-1:35 pm

1 stop20h 15m

$1,267

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 12/30

5:50 am-6:50 am

2 stops31h 00m

Sydney Kingsford Smith

Sun 2/15

10:40 am-4:15 pm

2 stops23h 35m

$1,275

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

Sat 2/28

8:16 am-3:25 pm

2 stops37h 39m

Adelaide

Wed 3/4

2:25 pm-11:00 pm

2 stops50h 05m

$1,425

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

Sat 2/28

10:53 am-9:30 am

1 stop29h 07m

Adelaide

Wed 3/4

2:55 pm-4:07 pm

1 stop18h 42m

$1,793

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

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, September is the cheapest month in which you can book a flight from Boise to Australia (average of $886). Flying from Boise to Australia in July is currently the most expensive (average of $1,456). 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 December 9, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 44% on flights from Boise to Australia by exploring options for tickets in the afternoon.

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 December 9, 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
9,092 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
American Airlines
7.2
Good
11,048 reviews
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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.

  • How long is the flight from Boise to Australia?

    Airlines like American Airlines, Alaska Airlines, and Qantas Airways fly from Boise to Australia in about 19h 58m. The time it takes to get you to your destination can typically vary by up to 17h 41m. The distance from Boise to Australia is about 7894 mi. This flight may include one or multiple stops.

  • 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, September is the cheapest month in which you can book a flight from Boise to Australia (average of $886). Flying from Boise to Australia in July is currently the most expensive (average of $1,456). 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 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 December 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$864Average$1,082FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$898Average$1,321FlexibilityNo 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.