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Cheap flights from Boise to Sydney from $890

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
16 Apr — 23 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap 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 17 March 2026.

Mon 27/419:14
BOI
-
SYD
1 stop20h 16m
Multiple Airlines
Mon 4/517:50
SYD
-
BOI
1 stop21h 11m
Multiple Airlines
Deal found 12/3$1,670
Mon 27/414:37
BOI
-
SYD
2 stops24h 23m
United Airlines
Mon 4/510:20
SYD
-
BOI
1 stop24h 51m
United Airlines
Deal found 12/3$1,674
Wed 15/414:14
BOI
-
SYD
2 stops25h 16m
American Airlines
Wed 22/409:10
SYD
-
BOI
2 stops24h 43m
American Airlines
Deal found 16/3$1,676
Thu 30/718:51
BOI
-
SYD
1 stop20h 14m
Alaska Airlines
Mon 31/809:10
SYD
-
BOI
1 stop20h 34m
Alaska Airlines
Deal found 14/3$1,681
Thu 30/718:51
BOI
-
SYD
1 stop20h 14m
Multiple Airlines
Mon 31/809:10
SYD
-
BOI
1 stop20h 34m
Multiple Airlines
Deal found 12/3$1,710
Sun 3/506:23
BOI
-
SYD
2 stops34h 22m
Air New Zealand
Sat 16/519:20
SYD
-
BOI
2 stops39h 51m
Air New Zealand
Deal found 16/3$1,713
Thu 30/717:40
BOI
-
SYD
2 stops21h 50m
American Airlines
Mon 31/812:00
SYD
-
BOI
1 stop26h 17m
American Airlines
Deal found 15/3$1,732
Wed 1/710:35
BOI
-
SYD
2 stops32h 05m
Air New Zealand
Wed 8/711:55
SYD
-
BOI
2 stops26h 12m
Air New Zealand
Deal found 15/3$1,734
Thu 30/707:00
BOI
-
SYD
2 stops33h 45m
Air New Zealand
Mon 31/809:55
SYD
-
BOI
2 stops27h 24m
Air New Zealand
Deal found 15/3$1,740
Sun 3/518:58
BOI
-
SYD
1 stop19h 57m
United Airlines
Sat 16/510:20
SYD
-
BOI
1 stop21h 06m
United Airlines
Deal found 16/3$1,745

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 17 March 2026.

Round-trip from

$1,670

One-way from

$890

Popular in

March

Cheapest in

October

Average price

$2,163
27/4-4/5
  • 27/4-4/5
  • 2 total stops
  • 41h 27m total
  • Boise to Sydney
Search Deals
American Airlines
  • American Airlines
  • 9/4
  • 2 total stops
  • 25h 16m total
  • Boise to Sydney
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($117 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($42 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 17 March 2026.
Use the filters below to find and compare flights from Boise to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 27/4

19:14-07:30

1 stop20h 16m

Sydney Kingsford Smith

Mon 4/5

17:50-23:01

1 stop21h 11m

$1,670

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 27/4

14:37-07:00

2 stops24h 23m

Sydney Kingsford Smith

Mon 4/5

10:20-19:11

1 stop24h 51m

$1,674

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 27/4

18:26-07:05

2 stops20h 39m

Sydney Kingsford Smith

Mon 4/5

09:10-17:53

2 stops24h 43m

$1,676

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 3/5

18:58-06:55

1 stop19h 57m

Sydney Kingsford Smith

Sat 16/5

10:20-15:26

1 stop21h 06m

$1,745

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

19:05-06:55

1 stop19h 50m

Sydney Kingsford Smith

Mon 31/8

11:55-19:27

2 stops23h 32m

$1,894

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

18:51-07:05

1 stop20h 14m

Sydney Kingsford Smith

Mon 31/8

09:10-13:44

1 stop20h 34m

$1,894
Fastest return journey

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 25/4

19:14-07:05

1 stop19h 51m

Sydney Kingsford Smith

Wed 29/4

09:10-12:34

1 stop19h 24m

$1,909

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 25/4

19:03-06:55

1 stop19h 52m

Sydney Kingsford Smith

Wed 29/4

10:20-16:48

1 stop22h 28m

$1,958
Cheapest one-way
Fastest single journey

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 9/4

14:14-07:30

2 stops25h 16m

$890

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 9/4

07:40-11:50

3 stops36h 10m

$1,180

Flights are sorted by cheapest return flights first.

Deals found on 15/3

Sorted by cheapest first

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 19h 50m. 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
Katoomba
Manly
Terrigal
Lithgow
Bondi Beach
Coogee
Cronulla
Leura
Randwick

Browse thousands of different options on Cheapflights for your next trip

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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

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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