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Cheap flights from Boise to Sydney from $868

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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
9 Nov — 16 Nov1
1 adult
1 adult, Economy

Cheap 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 10 October 2025.

Round-trip from

$1,719

One-way from

$868

Popular in

January

Cheapest in

September

Average price

$1,732
Alaska Airlines
  • Alaska Airlines
  • 2/2-10/2
  • 4 total stops
  • 51h 17m total
  • Boise to Sydney
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American Airlines
  • American Airlines
  • 7/11
  • 1 total stop
  • 29h 55m total
  • Boise to Sydney
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($319 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($65 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Find flight deals from Boise to Sydney

Enter your travel dates to find the best prices.

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 10 October 2025.

Tue 9/1213:50BOI - SYD
2 stops24h 55mMultiple Airlines
Tue 16/1207:45SYD - BOI
2 stops33h 20mMultiple Airlines
Deal found 9/10$1,802
Tue 30/1213:00BOI - SYD
2 stops25h 30mDelta
Sun 15/210:40SYD - BOI
2 stops27h 33mDelta
Deal found 10/10$1,833
Sun 23/1106:20BOI - SYD
2 stops32h 25mMultiple Airlines
Sun 30/1119:15SYD - BOI
2 stops45h 33mMultiple Airlines
Deal found 8/10$1,998
Mon 24/1107:00BOI - SYD
1 stop29h 55mAmerican Airlines
Mon 1/1214:05SYD - BOI
1 stop26h 02mAmerican Airlines
Deal found 10/10$2,018
Tue 30/1208:30BOI - SYD
1 stop27h 50mUnited Airlines
Sun 15/212:10SYD - BOI
1 stop22h 21mUnited Airlines
Deal found 10/10$2,042
Thu 25/1214:10BOI - SYD
1 stop22h 10mUnited Airlines
Thu 8/112:10SYD - BOI
1 stop17h 15mUnited Airlines
Deal found 8/10$2,231
Mon 24/1114:11BOI - SYD
2 stops24h 34mAir New Zealand
Mon 1/1213:55SYD - BOI
2 stops41h 40mAir New Zealand
Deal found 10/10$2,252

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 10 October 2025.
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 26/2

19:20-19:45

2 stops30h 25m

Sydney Kingsford Smith

Thu 5/3

21:40-12:04

2 stops32h 24m

$1,747

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 9/12

13:50-08:45

2 stops24h 55m

Sydney Kingsford Smith

Tue 16/12

07:45-23:05

2 stops33h 20m

$1,802

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 2/2

19:02-17:40

2 stops28h 38m

Sydney Kingsford Smith

Tue 10/2

11:20-23:02

1 stop29h 42m

$1,810

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/12

13:00-08:30

2 stops25h 30m

Sydney Kingsford Smith

Sun 15/2

10:40-20:13

2 stops27h 33m

$1,833

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 26/2

13:48-06:55

1 stop23h 07m

Sydney Kingsford Smith

Thu 5/3

14:05-21:09

1 stop25h 04m

$1,921

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 23/11

06:20-08:45

2 stops32h 25m

Sydney Kingsford Smith

Sun 30/11

19:15-22:48

2 stops45h 33m

$1,998

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 9/12

10:35-09:15

1 stop28h 40m

Sydney Kingsford Smith

Tue 16/12

14:00-19:14

1 stop23h 14m

$2,042

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/12

18:55-09:15

1 stop20h 20m

Sydney Kingsford Smith

Sun 15/2

14:00-23:37

1 stop27h 37m

$2,042

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 7/11

07:00-06:55

1 stop29h 55m

$868

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 7/11

06:15-09:15

2 stops33h 00m

$879

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 11 results
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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 return 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 Sydney

What is the cheapest month to book a flight from Boise to Sydney?

Currently, September is the cheapest month in which you can book a flight from Boise to Sydney (average of $1,356). Flying from Boise to Sydney in July is currently the most expensive (average of $2,229). 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.

How much does it cost for a return flight from Boise to Sydney?

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.

  • How long is the flight from Boise to Sydney?

    Departing from Boise to Sydney will take you 25h 30m. Airlines will cover a distance of 12704 km. This flight may include one or multiple stops.

  • 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 holiday 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.

  • What is the cheapest month to book a flight from Boise to Sydney?

    Currently, September is the cheapest month in which you can book a flight from Boise to Sydney (average of $1,356). Flying from Boise to Sydney in July is currently the most expensive (average of $2,229). 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

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Katoomba
Penrith
Manly
Terrigal
Randwick
Bondi Beach
Coogee
Cronulla
Leura
Lithgow

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Alternative routes for Boise to Sydney

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Fly with Cheapflights

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How does Cheapflights help users find flights from Boise to Sydney?

Cheapflights helps you search for flights from Boise to Sydney via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Boise to Sydney?

Millions of users choose and trust Cheapflights to book the best flight deals from Boise to Sydney for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Boise to Sydney with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Boise to Sydney, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Boise to Sydney become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Boise today and book when prices fit your budget.

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