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Cheap flights from Boise to Sydney from $1,800

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
11 Dec — 18 Dec1
1 adult
1 adult, Economy, 0 bags

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 11 November 2025.

Round-trip from

$1,800

Popular in

December

Cheapest in

September

Average price

$2,086
Alaska Airlines
  • Alaska Airlines
  • 2/4-27/4
  • 2 total stops
  • 39h 03m total
  • Boise to Sydney
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Highest demand for flights based on searches. 10% potential increase in price ($337 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease ($51 potential savings vs. average return price).
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Average for round-trip flights in November 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 11 November 2025.

Tue 9/1207:58BOI - SYD
2 stops32h 32mMultiple Airlines
Tue 16/1209:55SYD - BOI
2 stops31h 10mMultiple Airlines
Deal found 9/11$1,976
Tue 30/1208:30BOI - SYD
1 stop27h 50mUnited Airlines
Sun 15/212:10SYD - BOI
1 stop17h 07mUnited Airlines
Deal found 10/11$2,085
Thu 13/1113:25BOI - SYD
2 stops27h 30mQantas Airways
Sat 15/1121:55SYD - BOI
2 stops42h 14mQantas Airways
Deal found 9/11$2,267
Thu 13/1118:58BOI - SYD
1 stop20h 02mMultiple Airlines
Sat 15/1121:55SYD - BOI
2 stops43h 07mMultiple Airlines
Deal found 9/11$2,284
Sun 7/1220:16BOI - SYD
2 stops29h 29mAlaska Airlines
Fri 19/1221:40SYD - BOI
2 stops29h 35mAlaska Airlines
Deal found 10/11$2,314
Tue 9/1213:50BOI - SYD
1 stop25h 15mUnited Airlines
Tue 16/1212:10SYD - BOI
2 stops23h 57mUnited Airlines
Deal found 9/11$2,320
Thu 13/1105:54BOI - SYD
2 stops19h 51mHawaiian Airlines
Sat 15/1121:40SYD - BOI
3 stops33h 05mHawaiian Airlines
Deal found 9/11$2,428
Tue 9/1213:50BOI - SYD
2 stops24h 55mAir New Zealand
Tue 16/1212:10SYD - BOI
1 stop21h 53mAir New Zealand
Deal found 9/11$2,472
Sun 7/1214:20BOI - SYD
2 stops26h 10mMultiple Airlines
Fri 19/1211:20SYD - BOI
1 stop20h 08mMultiple Airlines
Deal found 10/11$2,590
Sun 7/1213:25BOI - SYD
1 stop23h 30mAmerican Airlines
Fri 19/1214:05SYD - BOI
1 stop25h 57mAmerican Airlines
Deal found 10/11$2,756

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 11 November 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

Fri 3/4

19:00-08:05

1 stop20h 05m

Sydney Kingsford Smith

Wed 29/4

09:10-12:08

1 stop18h 58m

$1,800

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 6/4

19:00-07:05

1 stop20h 05m

Sydney Kingsford Smith

Tue 28/4

09:10-12:08

1 stop18h 58m

$1,800

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 7/4

19:00-07:05

1 stop20h 05m

Sydney Kingsford Smith

Wed 29/4

09:10-12:08

1 stop18h 58m

$1,800

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 3/4

19:00-08:05

1 stop20h 05m

Sydney Kingsford Smith

Mon 27/4

09:10-12:08

1 stop18h 58m

$1,800

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 4/4

19:00-07:05

1 stop20h 05m

Sydney Kingsford Smith

Wed 29/4

09:10-12:08

1 stop18h 58m

$1,800

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 6/5

19:00-07:05

1 stop20h 05m

Sydney Kingsford Smith

Sun 10/5

09:10-12:08

1 stop18h 58m

$1,812

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 7/4

19:00-07:05

1 stop20h 05m

Sydney Kingsford Smith

Thu 30/4

09:10-23:07

1 stop29h 57m

$1,814

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 14/3

11:36-07:25

2 stops26h 49m

Sydney Kingsford Smith

Sat 21/3

13:05-21:15

1 stop25h 10m

$1,915

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 5/4

19:00-07:05

1 stop20h 05m

Sydney Kingsford Smith

Mon 27/4

09:10-12:08

1 stop18h 58m

$2,029

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 8/4

19:00-07:05

1 stop20h 05m

Sydney Kingsford Smith

Mon 27/4

09:10-12:08

1 stop18h 58m

$2,029

Flights are sorted by cheapest return flights first.

Deals found on 9/11

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 $1,357). Flying from Boise to Sydney in July is currently the most expensive (average of $2,230). 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.

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 20h 05m. Airlines will cover a distance of 12704 km.

  • 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 $1,357). Flying from Boise to Sydney in July is currently the most expensive (average of $2,230). 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
Terrigal
Manly
Randwick
Lithgow
Coogee
Leura
Bondi Beach
Cronulla

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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.
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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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