HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$1,065+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Mar 26 — Apr 21
Thu 3/26
Thu 4/2
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 February 24, 2026.

This American Airlines deal was found by Cheapflights users on 2/24. 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.
Wed 2/251:39 pm
BOI
-
SYD
2 stops25h 21m
American Airlines
Wed 3/411:20 am
SYD
-
BOI
2 stops24h 46m
American Airlines
Deal found 2/24$1,065
This Gurufare deal was found by Cheapflights users on 2/24. 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.
Tue 6/306:51 pm
BOI
-
SYD
1 stop20h 14m
Multiple Airlines
Wed 8/269:10 am
SYD
-
BOI
1 stop20h 34m
Multiple Airlines
Deal found 2/24$1,067
This American Airlines deal was found by Cheapflights users on 2/21. 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.
Tue 5/262:07 pm
BOI
-
SYD
2 stops24h 58m
American Airlines
Sun 6/75:50 pm
SYD
-
BOI
2 stops21h 16m
American Airlines
Deal found 2/21$1,072
This United Airlines deal was found by Cheapflights users on 2/23. 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.
Sun 5/247:05 pm
BOI
-
SYD
1 stop19h 50m
United Airlines
Sun 6/710:20 am
SYD
-
BOI
1 stop27h 20m
United Airlines
Deal found 2/23$1,078
This United Airlines deal was found by Cheapflights users on 2/24. 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.
Wed 2/258:41 am
BOI
-
SYD
1 stop27h 39m
United Airlines
Wed 3/412:10 pm
SYD
-
BOI
1 stop17h 07m
United Airlines
Deal found 2/24$1,079
This United Airlines deal was found by Cheapflights users on 2/23. 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.
Sun 5/242:40 pm
BOI
-
SYD
2 stops24h 20m
United Airlines
Wed 6/109:30 am
SYD
-
BOI
2 stops24h 26m
United Airlines
Deal found 2/23$1,083
This oojo deal was found by Cheapflights users on 2/24. 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.
Mon 10/126:51 pm
BOI
-
SYD
1 stop20h 14m
Multiple Airlines
Fri 10/3011:15 am
SYD
-
BOI
1 stop19h 29m
Multiple Airlines
Deal found 2/24$1,084
This Delta deal was found by Cheapflights users on 2/23. 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 5/236:41 pm
BOI
-
SYD
2 stops44h 09m
Delta
Mon 6/89:15 am
SYD
-
BOI
2 stops25h 20m
Delta
Deal found 2/23$1,096
This United Airlines deal was found by Cheapflights users on 2/23. 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 5/235:46 pm
BOI
-
SYD
2 stops45h 14m
United Airlines
Mon 6/810:20 am
SYD
-
BOI
1 stop18h 48m
United Airlines
Deal found 2/23$1,097
This American Airlines deal was found by Cheapflights users on 2/23. 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 5/102:14 pm
BOI
-
SYD
2 stops24h 51m
American Airlines
Sat 5/169:10 am
SYD
-
BOI
2 stops24h 43m
American Airlines
Deal found 2/23$1,106
This United Airlines deal was found by Cheapflights users on 2/23. 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.
Thu 2/266:55 pm
BOI
-
ADL
1 stop21h 05m
United Airlines
Mon 3/22:55 pm
ADL
-
BOI
1 stop26h 13m
United Airlines
Deal found 2/23$1,509
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Sun 2/2210:53 am
BOI
-
ADL
2 stops33h 47m
United Airlines
Thu 2/266:10 am
ADL
-
BOI
2 stops22h 37m
United Airlines
Deal found 2/21$1,587

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 February 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,072
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$1,334
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. 7% potential increase in price ($112 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 24, 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

Tue 5/26

10:35 am-6:55 am

1 stop28h 20m

Sydney Kingsford Smith

Wed 6/10

10:20 am-4:44 pm

1 stop22h 24m

$1,078

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 4/8

12:45 pm-6:50 am

2 stops26h 05m

Sydney Kingsford Smith

Wed 4/15

9:15 am-3:03 pm

1 stop21h 48m

$1,083

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 5/28

10:35 am-6:55 am

1 stop28h 20m

Sydney Kingsford Smith

Mon 6/8

10:20 am-9:40 pm

1 stop27h 20m

$1,119

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 5/26

10:35 am-6:55 am

1 stop28h 20m

Sydney Kingsford Smith

Thu 6/11

10:20 am-1:08 pm

1 stop18h 48m

$1,119

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 5/26

10:35 am-6:55 am

1 stop28h 20m

Sydney Kingsford Smith

Sat 6/6

10:20 am-4:44 pm

1 stop22h 24m

$1,119

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 4/8

7:03 pm-6:55 am

1 stop19h 52m

Sydney Kingsford Smith

Wed 4/15

10:20 am-3:24 pm

1 stop21h 04m

$1,145

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/30

7:05 pm-6:55 am

1 stop19h 50m

Sydney Kingsford Smith

Mon 8/31

9:30 am-1:30 pm

1 stop20h 00m

$1,190

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 4/9

1:45 pm-6:50 am

2 stops25h 05m

Sydney Kingsford Smith

Thu 4/16

9:15 am-5:22 pm

2 stops24h 07m

$1,224

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 3/13

7:07 am-8:05 am

1 stop31h 58m

Sydney Kingsford Smith

Sat 3/21

11:50 am-10:43 pm

2 stops27h 53m

$1,247

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 5/27

6:54 pm-6:50 pm

2 stops31h 56m

Sydney Kingsford Smith

Fri 6/5

8:45 pm-10:20 am

2 stops29h 35m

$1,373

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/23

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 February 24, 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
9,345 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,345 reviews
United Airlines
7.4
Good
9,345 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,345 reviews
United Airlines
7.4
Good
9,345 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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, United Airlines, and Delta fly from Boise to Australia in about 19h 50m. The time it takes to get you to your destination can typically vary by up to 5h 08m. 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 February 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$966Average$1,383FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$967Average$1,084FlexibilityNo cancel feeOn-time71%

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.