HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$1,281+ 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
dic. 18 — dic. 251
jue. 12/18
jue. 12/25
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.

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 noviembre 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/18. 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.
jue. 12/45:59 pmBOI - SYD
2 stops43h 26mMultiple Airlines
jue. 12/185:45 pmSYD - BOI
1 stop23h 17mMultiple Airlines
Deal found 11/18$1,331
This Alaska Airlines deal was found by Cheapflights users on 11/18. 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.
jue. 12/48:20 pmBOI - SYD
2 stops29h 25mAlaska Airlines
jue. 12/189:40 pmSYD - BOI
2 stops34h 09mAlaska Airlines
Deal found 11/18$1,354
This Alaska Airlines deal was found by Cheapflights users on 11/17. 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.
mar. 11/185:54 amBOI - SYD
2 stops43h 51mAlaska Airlines
mar. 11/259:40 pmSYD - BOI
2 stops37h 25mAlaska Airlines
Deal found 11/17$1,388
This Jetabroad deal was found by Cheapflights users on 11/17. 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.
vie. 11/215:41 amBOI - SYD
2 stops20h 04mHawaiian Airlines
mar. 11/259:40 pmSYD - BOI
2 stops29h 39mHawaiian Airlines
Deal found 11/17$1,461
This United Airlines deal was found by Cheapflights users on 11/18. 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. 12/302:10 pmBOI - SYD
1 stop22h 10mUnited Airlines
dom. 2/1512:10 pmSYD - BOI
1 stop27h 01mUnited Airlines
Deal found 11/18$1,511
This Orbitz deal was found by Cheapflights users on 11/16. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/178:41 amBOI - SYD
2 stops30h 54mMultiple Airlines
lun. 11/2410:20 pmSYD - BOI
2 stops42h 28mMultiple Airlines
Deal found 11/16$1,554

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 noviembre 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,246
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$1,362
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 ($144 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 noviembre 18, 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

dom. 2/22

8:30 am-7:25 am

2 stops28h 55m

Sydney Kingsford Smith

sáb. 3/7

5:45 pm-11:00 pm

1 stop23h 15m

$1,281

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

dom. 2/1

7:59 pm-7:45 pm

2 stops29h 46m

Sydney Kingsford Smith

sáb. 2/28

9:40 pm-9:30 am

2 stops29h 50m

$1,311

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 3/24

7:00 pm-9:00 am

1 stop21h 00m

Sydney Kingsford Smith

mié. 4/1

10:10 am-12:08 pm

1 stop18h 58m

$1,326

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

jue. 12/4

5:59 pm-7:25 am

2 stops43h 26m

Sydney Kingsford Smith

jue. 12/18

5:45 pm-11:02 pm

1 stop23h 17m

$1,331

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

dom. 2/22

7:00 am-6:55 am

1 stop29h 55m

Sydney Kingsford Smith

sáb. 3/7

2:05 pm-10:36 pm

1 stop26h 31m

$1,346

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mié. 3/4

8:41 am-6:20 am

1 stop27h 39m

Sydney Kingsford Smith

mié. 3/18

12:10 pm-7:16 pm

1 stop24h 06m

$1,348

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mié. 5/6

1:00 pm-6:35 am

1 stop25h 35m

Sydney Kingsford Smith

dom. 5/10

9:25 am-3:01 pm

1 stop21h 36m

$1,348

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 3/24

1:10 pm-6:05 am

2 stops23h 55m

Sydney Kingsford Smith

lun. 3/30

10:25 am-6:25 pm

2 stops25h 00m

$1,352

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

sáb. 3/21

1:10 pm-6:05 am

2 stops23h 55m

Sydney Kingsford Smith

vie. 3/27

9:40 am-8:13 pm

2 stops27h 33m

$1,352

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

sáb. 2/28

7:15 am-6:50 am

1 stop29h 35m

Sydney Kingsford Smith

mié. 3/4

10:40 am-12:10 pm

2 stops19h 30m

$1,352

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

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

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 noviembre 18, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 38% on flights from Boise to Australia by exploring options for tickets at noon.

What is the cheapest day to fly from Boise to Australia?

Use this chart to determine the cheapest time to fly round-trip from Boise to Australia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Boise to Australia flight should consider departing on Sunday afternoons when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 noviembre 18, 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
9,020 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,020 reviews
United Airlines
7.4
Good
9,020 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,047 reviews
United Airlines
7.4
Good
9,020 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 Alaska Airlines and Air New Zealand fly from Boise to Australia in about 29h 46m. The time it takes to get you to your destination can typically vary by up to 1h 24m. 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 noviembre 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$864Average$1,082FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$872Average$1,294FlexibilityNo 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.