HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$557+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
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

Keep the following information in mind while searching for Boise to Australia flight deals. Data was last updated January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,201
(Kiwi.com)

One-way from

$557
(Kiwi.com)

Popular in

December

Cheapest in

September
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
One-way flight from Boise Air Term. Gowen Fld to Australia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($176 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($23 potential savings vs. average RT price).
Search Deals

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 January 8, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/411:35 amBOI - SYD
2 stops25h 50mMultiple Airlines
Wed 2/115:45 pmSYD - BOI
1 stop23h 17mMultiple Airlines
Deal found 1/7$1,201
This FlightHub deal was found by Cheapflights users on 1/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/268:05 amBOI - SYD
2 stops31h 40mAir New Zealand
Mon 10/59:55 amSYD - BOI
2 stops44h 35mAir New Zealand
Deal found 1/8$1,219
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:49 amBOI - SYD
2 stops30h 41mAir New Zealand
Tue 3/3110:30 amSYD - BOI
1 stop26h 43mAir New Zealand
Deal found 1/6$1,235
This Delta deal was found by Cheapflights users on 1/8. 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.
Mon 1/2611:20 amBOI - SYD
2 stops27h 10mDelta
Sat 2/72:15 pmSYD - BOI
2 stops25h 43mDelta
Deal found 1/8$1,249
This Alaska Airlines deal was found by Cheapflights users on 1/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:51 pmBOI - SYD
1 stop20h 14mAlaska Airlines
Mon 10/510:10 amSYD - BOI
1 stop20h 34mAlaska Airlines
Deal found 1/6$1,269
This Delta deal was found by Cheapflights users on 1/5. 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.
Sat 9/264:50 pmBOI - SYD
1 stop21h 45mDelta
Mon 10/510:15 amSYD - BOI
1 stop21h 46mDelta
Deal found 1/5$1,273
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/209:52 amBOI - SYD
2 stops27h 33mMultiple Airlines
Fri 2/275:45 pmSYD - BOI
1 stop23h 15mMultiple Airlines
Deal found 1/6$1,326
This FlightHub deal was found by Cheapflights users on 1/7. 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.
Mon 10/192:11 pmBOI - ADL
2 stops28h 14mAir New Zealand
Sat 11/75:10 pmADL - BOI
2 stops41h 09mAir New Zealand
Deal found 1/7$1,335
This KAYAK deal was found by Cheapflights users on 1/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/256:49 pmBOI - SYD
1 stop20h 06mMultiple Airlines
Thu 6/411:55 amSYD - BOI
2 stops26h 27mMultiple Airlines
Deal found 1/7$1,337
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/188:05 amBOI - ADL
2 stops34h 20mAir New Zealand
Sat 11/75:10 pmADL - BOI
2 stops41h 09mAir New Zealand
Deal found 1/6$1,346
This Jetabroad deal was found by Cheapflights users on 1/7. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:05 amBOI - ADL
3 stops39h 50mMultiple Airlines
Sat 11/78:55 pmADL - BOI
2 stops43h 30mMultiple Airlines
Deal found 1/7$1,473
This Jetabroad deal was found by Cheapflights users on 1/6. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:10 pmBOI - ADL
3 stops38h 55mMultiple Airlines
Sat 11/75:10 pmADL - BOI
3 stops24h 31mMultiple Airlines
Deal found 1/6$1,505

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 January 8, 2026.
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 1/26

11:20 am-8:30 am

2 stops27h 10m

Sydney Kingsford Smith

Sat 2/7

2:15 pm-9:58 pm

2 stops25h 43m

$1,249

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 2/4

8:05 pm-2:25 pm

2 stops24h 20m

Sydney Kingsford Smith

Wed 2/11

7:15 pm-12:48 pm

2 stops35h 33m

$1,282

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 2/20

9:52 am-7:25 am

2 stops27h 33m

Sydney Kingsford Smith

Fri 2/27

5:45 pm-11:00 pm

1 stop23h 15m

$1,326

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 5/25

6:49 pm-6:55 am

1 stop20h 06m

Sydney Kingsford Smith

Thu 6/4

11:55 am-10:22 pm

2 stops26h 27m

$1,337

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 3/24

7:30 am-6:05 am

2 stops29h 35m

Sydney Kingsford Smith

Tue 3/31

10:15 am-6:43 pm

2 stops25h 28m

$1,360

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 2/4

8:05 pm-9:00 am

1 stop18h 55m

Sydney Kingsford Smith

Wed 2/11

11:20 am-1:35 pm

1 stop20h 15m

$1,379

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 3/24

7:05 pm-9:00 am

1 stop20h 55m

Sydney Kingsford Smith

Tue 3/31

10:10 am-12:25 pm

1 stop19h 15m

$1,419

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 1/26

7:20 am-6:55 am

1 stop29h 35m

Sydney Kingsford Smith

Sat 2/7

2:05 pm-7:25 pm

1 stop23h 20m

$1,500

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 2/18

1:44 pm-9:15 am

1 stop25h 31m

Sydney Kingsford Smith

Sun 2/22

12:10 pm-9:11 pm

1 stop27h 01m

$1,505

BoiseAdelaide

BOI - ADL

BOIADL

Boise Air Term. Gowen Fld

Sat 2/14

10:53 am-9:30 am

1 stop29h 07m

Adelaide

Wed 2/18

2:55 pm-11:38 pm

1 stop26h 13m

$1,944

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 12 results
1
2

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
No data available for this route at this time. Please check back soon.

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 January 8, 2026.
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
9,139 reviews

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,139 reviews
United Airlines
7.4
Good
9,139 reviews

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
American Airlines
7.2
Good
11,095 reviews
United Airlines
7.4
Good
9,139 reviews

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

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 Delta and United Airlines fly from Boise to Australia in about 27h 10m. The time it takes to get you to your destination can typically vary by up to 1h 57m. 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.

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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$864Average$1,082FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$947Average$1,347FlexibilityNo 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.