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$1,173+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Aug 4 — Aug 111
Tue 8/4
Tue 8/11
1 adult, Economy
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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 July 5, 2026.

This oojo deal was found by Cheapflights users on 7/2. 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.
Sun 8/1610:52 am
BOI
-
SYD
1 stop27h 33m
Multiple Airlines
Sun 8/239:25 pm
SYD
-
BOI
1 stop17h 02m
Multiple Airlines
Deal found 7/2$1,173
This United Airlines deal was found by Cheapflights users on 7/2. 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 8/162:44 pm
BOI
-
SYD
2 stops24h 16m
United Airlines
Sun 8/2310:20 am
SYD
-
BOI
1 stop21h 11m
United Airlines
Deal found 7/2$1,186
This American Airlines deal was found by Cheapflights users on 7/2. 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 8/161:55 pm
BOI
-
SYD
2 stops25h 35m
American Airlines
Sun 8/235:50 pm
SYD
-
BOI
2 stops21h 08m
American Airlines
Deal found 7/2$1,187
This BusinessClass deal was found by Cheapflights users on 6/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:51 pm
BOI
-
SYD
2 stops34h 59m
Multiple Airlines
Thu 10/228:45 pm
SYD
-
BOI
2 stops32h 43m
Multiple Airlines
Deal found 6/30$1,283
This oojo deal was found by Cheapflights users on 6/30. 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.
Tue 10/136:57 pm
BOI
-
SYD
1 stop20h 08m
Qantas Airways
Thu 10/226:50 pm
SYD
-
BOI
1 stop21h 07m
Qantas Airways
Deal found 6/30$1,289
This FlightHub deal was found by Cheapflights users on 7/1. 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.
Wed 9/302:44 pm
BOI
-
SYD
2 stops24h 36m
Air Canada
Mon 10/510:20 am
SYD
-
BOI
2 stops40h 14m
Air Canada
Deal found 7/1$1,312
This FlightHub deal was found by Cheapflights users on 7/2. 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 9/262:35 pm
BOI
-
SYD
2 stops24h 45m
Air Canada
Sat 10/39:20 am
SYD
-
BOI
2 stops28h 15m
Air Canada
Deal found 7/2$1,336
This FlightHub deal was found by Cheapflights users on 7/2. 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.
Thu 7/306:30 am
BOI
-
SYD
2 stops32h 50m
Air Canada
Mon 8/319:20 am
SYD
-
BOI
2 stops29h 20m
Air Canada
Deal found 7/2$1,359
This Expedia deal was found by Cheapflights users on 6/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:14 am
BOI
-
SYD
1 stop27h 11m
Multiple Airlines
Tue 10/610:20 am
SYD
-
BOI
2 stops40h 14m
Multiple Airlines
Deal found 6/30$1,361
This Expedia deal was found by Cheapflights users on 6/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:05 am
BOI
-
SYD
1 stop31h 25m
Alaska Airlines
Tue 10/66:50 pm
SYD
-
BOI
1 stop21h 07m
Alaska Airlines
Deal found 6/30$1,363

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 July 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,173
(oojo)

Popular in

November

Cheapest in

March

Average price

$1,361
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. 9% potential increase in price ($131 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 5, 2026.
Use the filters below to find and compare flights from Boise to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 8/18

2:44 pm-6:55 am

2 stops24h 11m

Sydney Kingsford Smith

Tue 8/25

10:20 am-3:31 pm

1 stop21h 11m

$1,186

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 8/16

2:44 pm-7:00 am

2 stops24h 16m

Sydney Kingsford Smith

Sun 8/23

10:20 am-3:31 pm

1 stop21h 11m

$1,186

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 10/2

7:05 am-6:30 am

1 stop31h 25m

Sydney Kingsford Smith

Tue 10/6

6:50 pm-10:57 pm

1 stop21h 07m

$1,363

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/30

1:57 pm-7:30 am

2 stops25h 33m

Sydney Kingsford Smith

Mon 8/31

12:00 pm-10:11 pm

1 stop26h 11m

$1,407

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/30

10:35 am-6:55 am

1 stop28h 20m

Sydney Kingsford Smith

Mon 8/31

10:20 am-9:35 am

2 stops39h 15m

$1,420

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 9/30

2:14 pm-6:55 am

1 stop24h 41m

Sydney Kingsford Smith

Mon 10/5

11:20 am-2:10 pm

1 stop19h 50m

$1,496
Quickest round-trip

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 10/17

2:35 pm-7:55 am

1 stop24h 20m

Sydney Kingsford Smith

Wed 10/21

11:20 am-1:03 pm

1 stop18h 43m

$1,496

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/4

Sorted by cheapest first

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, March is the cheapest month in which you can book a flight from Boise to Australia (average of $543). Flying from Boise to Australia in July is currently the most expensive (average of $1,361). 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.

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 July 5, 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
9,933 reviews

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
9,933 reviews
United Airlines
7.4
Good
9,933 reviews

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
American Airlines
7.1
Good
11,777 reviews
United Airlines
7.4
Good
9,933 reviews

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

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 United Airlines, Alaska Airlines, and American Airlines fly from Boise to Australia in about 24h 11m. The time it takes to get you to your destination can typically vary by up to 7h 14m. 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, March is the cheapest month in which you can book a flight from Boise to Australia (average of $543). Flying from Boise to Australia in July is currently the most expensive (average of $1,361). 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.

Alternative routes for Boise to Australia

See prices for flight routes from nearby airports that may be better suited for you.
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Boise to Adelaide flights

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 July 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$966Average$1,362FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$967Average$1,161FlexibilityNo cancel feeOn-time71%

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