Find flights
When to book
FAQs

Cheap flights from Boise to Sydney from $834

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 15/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
24 May — 31 May1
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 24 April 2026.

Wed 30/918:47
BOI
-
SYD
1 stop20h 43m
Multiple Airlines
Mon 5/1010:10
SYD
-
BOI
1 stop20h 34m
Multiple Airlines
Deal found 20/4$1,808
Wed 19/818:47
BOI
-
SYD
1 stop20h 18m
Alaska Airlines
Sat 29/809:10
SYD
-
BOI
1 stop29h 50m
Alaska Airlines
Deal found 24/4$1,825
Wed 20/513:53
BOI
-
SYD
1 stop25h 02m
American Airlines
Wed 27/512:00
SYD
-
BOI
1 stop26h 29m
American Airlines
Deal found 20/4$1,840
Wed 30/913:42
BOI
-
SYD
2 stops25h 48m
American Airlines
Mon 5/1010:10
SYD
-
BOI
2 stops23h 40m
American Airlines
Deal found 22/4$1,844
Thu 25/608:03
BOI
-
SYD
1 stop31h 02m
Multiple Airlines
Sun 5/717:50
SYD
-
BOI
1 stop32h 22m
Multiple Airlines
Deal found 22/4$1,893
Thu 30/713:57
BOI
-
SYD
2 stops25h 08m
American Airlines
Mon 31/817:50
SYD
-
BOI
2 stops20h 50m
American Airlines
Deal found 22/4$1,909
Mon 4/513:53
BOI
-
SYD
1 stop25h 02m
American Airlines
Sat 9/509:10
SYD
-
BOI
2 stops24h 43m
American Airlines
Deal found 23/4$1,914
Mon 22/614:05
BOI
-
SYD
1 stop24h 50m
United Airlines
Thu 2/709:30
SYD
-
BOI
2 stops28h 05m
United Airlines
Deal found 21/4$1,916
Fri 8/508:02
BOI
-
SYD
1 stop30h 58m
United Airlines
Sun 17/510:20
SYD
-
BOI
1 stop21h 06m
United Airlines
Deal found 22/4$1,926
Sat 26/918:47
BOI
-
SYD
1 stop20h 18m
Multiple Airlines
Sat 3/1017:50
SYD
-
BOI
1 stop21h 05m
Multiple Airlines
Deal found 22/4$1,935

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 24 April 2026.

Round-trip from

$1,808

One-way from

$834

Popular in

December

Cheapest in

March

Average price

$1,777
30/9-5/10
  • 30/9-5/10
  • 2 total stops
  • 41h 17m total
  • Boise to Sydney
Search Deals
15/8
  • 15/8
  • 3 total stops
  • 32h 58m 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 ($37 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 24 April 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

Wed 19/8

18:47-07:05

1 stop20h 18m

Sydney Kingsford Smith

Sat 29/8

09:10-23:00

1 stop29h 50m

$1,825

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 30/9

13:42-07:05

2 stops25h 23m

Sydney Kingsford Smith

Mon 5/10

13:00-22:17

1 stop26h 17m

$1,844

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 20/5

14:14-06:55

2 stops24h 41m

Sydney Kingsford Smith

Wed 27/5

09:10-17:09

2 stops23h 59m

$1,846
Fastest return journey

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 22/6

19:05-06:55

1 stop19h 50m

Sydney Kingsford Smith

Fri 3/7

09:30-19:18

1 stop25h 48m

$1,909

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

13:57-07:05

2 stops25h 08m

Sydney Kingsford Smith

Mon 31/8

17:50-22:40

2 stops20h 50m

$1,909

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 22/6

17:40-07:05

2 stops21h 25m

Sydney Kingsford Smith

Fri 3/7

12:00-23:05

1 stop27h 05m

$1,910

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 25/6

10:20-07:00

2 stops28h 40m

Sydney Kingsford Smith

Sun 5/7

09:30-21:35

2 stops28h 05m

$1,914

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 8/5

18:26-07:05

2 stops20h 39m

Sydney Kingsford Smith

Sun 17/5

12:00-22:54

1 stop26h 54m

$1,914
Cheapest one-way

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 15/8

10:52-11:50

3 stops32h 58m

$834
Fastest single journey

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 15/8

18:51-07:30

1 stop20h 39m

$949

Flights are sorted by cheapest return flights first.

Deals found on 21/4

Showing 1-10 of 11 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 20h 18m. 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
Cronulla
Manly
Bondi Beach
Leura
Randwick
Coogee

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.