Find flights
When to book
FAQs

Cheap flights from Boise to Sydney from $831

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
8 Feb — 15 Feb1
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 9 January 2026.

Round-trip from

$1,792

One-way from

$831

Popular in

December

Cheapest in

September
4/2-11/2
  • 4/2-11/2
  • 3 total stops
  • 49h 07m total
  • Boise to Sydney
Search Deals
4/2
  • 4/2
  • 2 total stops
  • 45h 42m total
  • Boise to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($392 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($51 potential savings vs. average return price).
Search Deals

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 9 January 2026.

Sun 18/107:05BOI - SYD
2 stops45h 00mMultiple Airlines
Tue 3/214:00SYD - BOI
2 stops26h 57mMultiple Airlines
Deal found 9/1$1,771
Wed 4/211:35BOI - SYD
2 stops25h 50mMultiple Airlines
Wed 11/217:45SYD - BOI
1 stop23h 17mMultiple Airlines
Deal found 7/1$1,792
Sun 18/114:37BOI - SYD
2 stops24h 38mUnited Airlines
Tue 3/212:10SYD - BOI
1 stop22h 00mUnited Airlines
Deal found 9/1$1,798
Mon 23/214:40BOI - SYD
2 stops24h 35mUnited Airlines
Mon 2/311:20SYD - BOI
1 stop27h 35mUnited Airlines
Deal found 8/1$1,815
Sat 26/908:05BOI - SYD
2 stops31h 40mAir New Zealand
Mon 5/1009:55SYD - BOI
2 stops44h 35mAir New Zealand
Deal found 8/1$1,819
Tue 24/310:49BOI - SYD
2 stops30h 41mAir New Zealand
Tue 31/310:30SYD - BOI
1 stop26h 43mAir New Zealand
Deal found 6/1$1,843
Mon 26/113:00BOI - SYD
2 stops25h 30mDelta
Sat 7/214:15SYD - BOI
1 stop26h 03mDelta
Deal found 8/1$1,864
Sat 2/508:11BOI - SYD
2 stops32h 34mMultiple Airlines
Sat 6/619:20SYD - BOI
2 stops38h 21mMultiple Airlines
Deal found 8/1$1,874
Sat 26/908:18BOI - SYD
1 stop30h 47mAlaska Airlines
Mon 5/1010:10SYD - BOI
1 stop29h 45mAlaska Airlines
Deal found 8/1$1,921

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 9 January 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

Wed 18/2

13:44-06:20

1 stop22h 36m

Sydney Kingsford Smith

Sun 22/2

11:20-20:55

1 stop27h 35m

$1,815

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 23/2

10:53-09:15

1 stop28h 22m

Sydney Kingsford Smith

Mon 2/3

12:10-16:07

1 stop21h 57m

$1,815

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 23/2

08:50-08:30

2 stops29h 40m

Sydney Kingsford Smith

Mon 2/3

10:40-18:22

2 stops25h 42m

$1,821

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 26/1

11:20-08:30

2 stops27h 10m

Sydney Kingsford Smith

Sat 7/2

14:15-21:58

2 stops25h 43m

$1,864

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 2/5

08:11-08:45

2 stops32h 34m

Sydney Kingsford Smith

Sat 6/6

19:20-17:41

2 stops38h 21m

$1,874

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 4/2

20:05-14:25

2 stops24h 20m

Sydney Kingsford Smith

Wed 11/2

19:15-12:48

2 stops35h 33m

$1,913

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 2/5

12:30-06:55

1 stop26h 25m

Sydney Kingsford Smith

Sat 6/6

19:20-17:41

2 stops38h 21m

$1,955

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 2/5

12:30-06:55

1 stop26h 25m

Sydney Kingsford Smith

Sat 6/6

10:20-16:49

1 stop22h 29m

$1,964

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 4/2

15:43-07:25

2 stops45h 42m

$831

Flights are sorted by cheapest return flights first.

Deals found on 7/1

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.

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 22h 36m. 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.

See more FAQs

Travelling to a place near Sydney?

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

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 Sydney

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

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

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.