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Cheap flights from Boise to Sydney from $966

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 13/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
16 Jun — 23 Jun1
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 May 2026.

Mon 1/619:05
BOI
-
SYD
1 stop19h 50m
Air New Zealand
Mon 8/610:20
SYD
-
BOI
1 stop27h 20m
Air New Zealand
Deal found 13/5$1,622
Tue 2/614:40
BOI
-
SYD
2 stops24h 15m
United Airlines
Tue 9/610:20
SYD
-
BOI
1 stop22h 24m
United Airlines
Deal found 13/5$1,623
Mon 1/617:40
BOI
-
SYD
2 stops21h 25m
American Airlines
Mon 8/617:50
SYD
-
BOI
2 stops21h 21m
American Airlines
Deal found 13/5$1,625
Mon 1/619:05
BOI
-
SYD
1 stop19h 50m
United Airlines
Tue 30/609:30
SYD
-
BOI
1 stop28h 35m
United Airlines
Deal found 12/5$1,633
Sun 2/814:05
BOI
-
SYD
1 stop24h 50m
Air New Zealand
Thu 13/810:20
SYD
-
BOI
1 stop27h 04m
Air New Zealand
Deal found 12/5$1,692
Fri 22/514:40
BOI
-
SYD
2 stops24h 20m
United Airlines
Wed 19/810:20
SYD
-
BOI
1 stop21h 11m
United Airlines
Deal found 12/5$1,693
Thu 30/717:20
BOI
-
SYD
2 stops21h 45m
American Airlines
Mon 31/812:00
SYD
-
BOI
1 stop26h 20m
American Airlines
Deal found 13/5$1,695
Sun 14/610:35
BOI
-
SYD
1 stop28h 20m
Air New Zealand
Sat 27/609:30
SYD
-
BOI
1 stop28h 35m
Air New Zealand
Deal found 12/5$1,703
Fri 22/507:00
BOI
-
SYD
1 stop32h 00m
Air New Zealand
Wed 19/810:20
SYD
-
BOI
1 stop27h 04m
Air New Zealand
Deal found 12/5$1,705

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 May 2026.

Round-trip from

$1,622

One-way from

$966

Popular in

December

Cheapest in

March

Average price

$1,842
Air New Zealand
  • Air New Zealand
  • 1/6-8/6
  • 2 total stops
  • 47h 10m total
  • Boise to Sydney
Search Deals
13/6
  • 13/6
  • 2 total stops
  • 22h 54m total
  • Boise to Sydney
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($257 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($36 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 May 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

Tue 2/6

14:40-06:55

2 stops24h 15m

Sydney Kingsford Smith

Tue 9/6

10:20-16:44

1 stop22h 24m

$1,623

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 2/8

13:57-07:05

2 stops25h 08m

Sydney Kingsford Smith

Sun 9/8

17:50-22:58

2 stops21h 08m

$1,625

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 2/8

14:41-07:00

2 stops24h 19m

Sydney Kingsford Smith

Thu 13/8

10:20-11:04

1 stop16h 44m

$1,693
Fastest return journey

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 30/6

19:05-06:55

1 stop19h 50m

Sydney Kingsford Smith

Tue 7/7

10:20-13:08

1 stop18h 48m

$1,811

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 1/7

14:41-07:00

2 stops24h 19m

Sydney Kingsford Smith

Sun 2/8

10:20-13:08

1 stop18h 48m

$1,816

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 3/7

16:00-06:50

1 stop22h 50m

Sydney Kingsford Smith

Tue 21/7

09:15-14:46

1 stop21h 31m

$1,881

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 12/10

18:57-08:05

1 stop20h 08m

Sydney Kingsford Smith

Sat 24/10

18:50-22:57

1 stop21h 07m

$1,896

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 30/9

18:47-07:30

1 stop20h 43m

Sydney Kingsford Smith

Mon 5/10

18:50-22:57

1 stop21h 07m

$1,900
Cheapest one-way

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 13/6

18:51-09:45

2 stops22h 54m

$966

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 25/5

15:23-06:50

1 stop23h 27m

$975

Flights are sorted by cheapest return flights first.

Deals found on 15/5

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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

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 24h 15m. 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
Terrigal
Lithgow
Manly
Cronulla
Bondi Beach
Leura
Randwick
Coogee

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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