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$579+ Cheap flights from Boise (BOI) to Sydney (SYD)

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 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Mar 15 — Mar 221
Sun 3/15
Sun 3/22
1 adult, Economy
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Cheap flight deals from Boise to Sydney

Cheapest flights from Boise to Sydney
Explore the most affordable flight options available from Boise to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.

This KAYAK deal was found by Cheapflights users on 2/12. 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 2/151:25 pm
BOI
-
SYD
1 stop22h 45m
Multiple Airlines
Tue 2/177:15 pm
SYD
-
BOI
2 stops35h 33m
Multiple Airlines
Deal found 2/12$931
This oojo deal was found by Cheapflights users on 2/13. 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 9/12:11 pm
BOI
-
SYD
2 stops26h 34m
Air New Zealand
Sat 9/127:20 pm
SYD
-
BOI
2 stops43h 35m
Air New Zealand
Deal found 2/13$1,152
This oojo deal was found by Cheapflights users on 2/10. 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.
Thu 7/27:00 am
BOI
-
SYD
2 stops35h 40m
Air New Zealand
Sun 8/3011:55 am
SYD
-
BOI
2 stops26h 27m
Air New Zealand
Deal found 2/10$1,187
This oojo deal was found by Cheapflights users on 2/11. 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.
Thu 7/307:00 am
BOI
-
SYD
2 stops35h 40m
Air New Zealand
Mon 8/3111:55 am
SYD
-
BOI
2 stops23h 21m
Air New Zealand
Deal found 2/11$1,188
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 2/181:44 pm
BOI
-
SYD
1 stop22h 36m
United Airlines
Sun 2/2212:10 pm
SYD
-
BOI
1 stop17h 07m
United Airlines
Deal found 2/9$1,219
This United Airlines deal was found by Cheapflights users on 2/10. 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 2/112:37 pm
BOI
-
SYD
2 stops24h 38m
United Airlines
Wed 2/1811:20 am
SYD
-
BOI
1 stop27h 35m
United Airlines
Deal found 2/10$1,220
This KAYAK deal was found by Cheapflights users on 2/10. 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 10/51:00 pm
BOI
-
SYD
1 stop25h 55m
Multiple Airlines
Mon 10/199:55 am
SYD
-
BOI
2 stops44h 35m
Multiple Airlines
Deal found 2/10$1,248

Find flight deals from Boise to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,219
(United Airlines)

One-way from

$501
(Kiwi.com)

Popular in

April

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 Sydney Kingsford Smith
Search Deals
One-way flight from Boise Air Term. Gowen Fld to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($24 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
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boise to Sydney 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 13, 2026.
Use the filters below to find and compare flights from Boise to Sydney that are best for you.

Fly from

Boise

Fly to

Sydney

Route

Depart

Return

Price

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/2

7:00 am-10:40 am

2 stops35h 40m

Sydney Kingsford Smith

Sun 8/30

11:55 am-10:22 pm

2 stops26h 27m

$1,187

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/2

7:00 am-10:40 am

2 stops35h 40m

Sydney Kingsford Smith

Sun 8/23

11:55 am-7:16 pm

2 stops23h 21m

$1,187

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/30

7:00 am-10:40 am

2 stops35h 40m

Sydney Kingsford Smith

Sun 8/30

9:55 am-7:16 pm

2 stops25h 21m

$1,188

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 3/29

2:37 pm-8:00 am

2 stops24h 23m

Sydney Kingsford Smith

Sun 4/5

10:20 am-9:15 pm

1 stop26h 55m

$1,258

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 6/13

7:00 am-10:40 am

2 stops35h 40m

Sydney Kingsford Smith

Sat 6/27

7:20 pm-9:23 pm

2 stops42h 03m

$1,259

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/2

2:43 pm-7:00 am

2 stops24h 17m

Sydney Kingsford Smith

Sun 8/30

10:20 am-4:49 pm

1 stop22h 29m

$1,270

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/30

11:15 am-6:55 am

1 stop27h 40m

Sydney Kingsford Smith

Mon 8/31

10:20 am-9:15 pm

1 stop26h 55m

$1,270

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/2

2:43 pm-6:55 am

2 stops24h 12m

Sydney Kingsford Smith

Sun 8/23

10:20 am-9:15 pm

1 stop26h 55m

$1,270

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/30

2:43 pm-6:55 am

2 stops24h 12m

Sydney Kingsford Smith

Sun 8/30

10:20 am-4:49 pm

1 stop22h 29m

$1,271

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 3/15

2:40 pm-8:05 am

2 stops24h 25m

$579

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/10

Showing 1-10 of 11 results
1
2

Compare providers for flights from Boise to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boise to Sydney in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boise-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boise-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boise-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boise-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boise-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boise to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney 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.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated February 13, 2026.
Read reviews from past customers who have flown United Airlines from Boise to Sydney. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,283 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

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
9,283 reviews
United Airlines
7.4
Good
9,283 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

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 Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Boise to Sydney round-trip?

    Cheapflights users have booked flights from Boise to Sydney round-trip from $888. You may be able to fly from Boise to Sydney for 32% less than the average price by searching for this airline.

  • Can I find deals for flights from Boise to Sydney that include hotel bookings?

    Yes. In addition to deals on Boise to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boise to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to Sydney.

  • Can I find deals for business class flights from Boise to Sydney?

    Yes. Cheapflights offers flight deals from Boise to Sydney 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

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Manly

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Alternative routes for Boise to Sydney

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

Top airline flying from Boise to Sydney

Discover the top airline that operate flights from Boise to Sydney. 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 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$888Average$1,452FlexibilityNo cancel feeOn-time69%

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