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Cheap flights from Idaho to Sydney from $815

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
30 Jun — 7 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Idaho to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Idaho to Sydney
Explore the most affordable flight options available from Idaho to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 May 2026.

Wed 3/606:30
BOI
-
SYD
2 stops32h 50m
Air Canada
Tue 4/809:20
SYD
-
BOI
2 stops30h 35m
Air Canada
Deal found 30/5$1,578
Mon 1/616:09
GEG
-
SYD
1 stop21h 56m
Multiple Airlines
Wed 3/617:50
SYD
-
GEG
1 stop22h 02m
Multiple Airlines
Deal found 28/5$1,582
Wed 2/1216:47
GEG
-
SYD
1 stop18h 23m
Qantas Airways
Wed 16/1218:30
SYD
-
GEG
2 stops41h 51m
Qantas Airways
Deal found 30/5$1,599
Thu 11/606:20
GEG
-
SYD
1 stop31h 45m
Multiple Airlines
Wed 17/609:10
SYD
-
GEG
1 stop30h 05m
Multiple Airlines
Deal found 28/5$1,606
Wed 22/706:00
GEG
-
SYD
1 stop31h 55m
United Airlines
Wed 29/710:20
SYD
-
GEG
1 stop17h 07m
United Airlines
Deal found 27/5$1,624
Thu 30/706:30
BOI
-
SYD
2 stops32h 50m
Air Canada
Mon 31/809:20
SYD
-
BOI
2 stops40h 15m
Air Canada
Deal found 30/5$1,639
Wed 2/1216:47
GEG
-
SYD
1 stop18h 23m
Qantas Airways
Tue 15/1207:00
SYD
-
GEG
2 stops32h 57m
Qantas Airways
Deal found 30/5$1,679
Wed 30/906:25
BOI
-
SYD
2 stops32h 55m
Air Canada
Mon 5/1010:20
SYD
-
BOI
2 stops40h 15m
Air Canada
Deal found 30/5$1,685
Thu 29/1014:51
GEG
-
SYD
1 stop23h 09m
Qantas Airways
Sat 7/1114:05
SYD
-
GEG
1 stop25h 50m
Qantas Airways
Deal found 27/5$1,688
Sun 1/1107:02
GEG
-
SYD
2 stops31h 33m
Air Canada
Sat 21/1111:20
SYD
-
GEG
2 stops44h 20m
Air Canada
Deal found 29/5$1,697
Sun 18/1006:25
BOI
-
SYD
2 stops32h 55m
Air Canada
Sun 1/1111:20
SYD
-
BOI
2 stops23h 29m
Air Canada
Deal found 30/5$1,718
Tue 20/1014:31
BOI
-
SYD
2 stops24h 49m
Air Canada
Fri 30/1010:20
SYD
-
BOI
2 stops30h 39m
Air Canada
Deal found 30/5$1,771

Find flight deals from Idaho to Sydney

Keep the following information in mind while searching for Idaho to Sydney flight deals. Data was last updated 31 May 2026.

Round-trip from

$1,606

One-way from

$815

Popular in

December

Cheapest in

March

Average price

$1,832
Qantas Airways
  • Qantas Airways
  • 11/6-17/6
  • 2 total stops
  • 61h 50m total
  • Idaho to Sydney
Search Deals
7/10
  • 7/10
  • 2 total stops
  • 24h 43m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($252 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 May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Idaho 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 31 May 2026.
Use the filters below to find and compare flights from Idaho to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 11/6

06:20-07:05

1 stop31h 45m

Sydney Kingsford Smith

Wed 17/6

09:10-22:15

1 stop30h 05m

$1,606

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 22/7

06:00-06:55

1 stop31h 55m

Sydney Kingsford Smith

Wed 29/7

09:30-15:11

2 stops22h 41m

$1,631

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 1/11

07:02-09:35

2 stops31h 33m

Sydney Kingsford Smith

Sat 21/11

11:20-12:40

2 stops44h 20m

$1,697

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 4/11

12:30-09:15

1 stop25h 45m

Sydney Kingsford Smith

Sun 8/11

12:10-11:24

1 stop18h 14m

$1,710

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 1/11

12:30-09:15

1 stop25h 45m

Sydney Kingsford Smith

Sat 21/11

12:10-11:24

1 stop18h 14m

$1,710

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 17/10

12:50-07:55

1 stop25h 05m

Sydney Kingsford Smith

Wed 21/10

11:20-10:30

1 stop17h 10m

$1,710

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 11/6

13:41-06:55

2 stops24h 14m

Sydney Kingsford Smith

Wed 17/6

10:20-10:27

1 stop17h 07m

$1,711

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 1/11

13:45-09:05

2 stops24h 20m

Sydney Kingsford Smith

Sat 21/11

11:20-21:09

2 stops28h 49m

$1,715

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

19:07-07:30

1 stop20h 23m

Sydney Kingsford Smith

Sun 16/8

17:50-22:45

1 stop20h 55m

$1,864

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

17:20-07:05

2 stops21h 45m

Sydney Kingsford Smith

Sun 16/8

17:50-22:58

2 stops21h 08m

$1,871

Flights are sorted by cheapest return flights first.

Deals found on 29/5

Showing 1-10 of 26 resultsSorted by cheapest first
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Best time to book a flight from Idaho to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Idaho 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 Idaho to Sydney

How much does it cost for a return flight from Idaho to Sydney?

Related info for your journey

Find useful and relevant information for your journey from Idaho to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sydney from Idaho?

    Sydney Kingsford Smith (SYD), located 7.5 km from the city centre, is the airport you fly into when you book flights from Idaho to Sydney.

  • How long is the flight from Idaho to Sydney?

    Departing from Idaho to Sydney will take you 21h 45m. Airlines will cover a distance of 12704 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Idaho to Sydney that include hotel bookings?

    Yes. In addition to deals on Idaho to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Sydney.

  • Can I find deals for business class flights from Idaho to Sydney?

    Yes. Cheapflights offers flight deals from Idaho 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
Cronulla
Manly
Terrigal
Lithgow
Bondi Beach
Leura
Randwick
Coogee

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How does Cheapflights help users find flights from Idaho to Sydney?

Cheapflights makes it easy to find Idaho to Sydney flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Idaho to Sydney?

Cheapflights helps you find that perfect flight to Sydney from Idaho by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Idaho to Sydney with no change fees?

Certainly. Search results for flights to Sydney from Idaho shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Idaho 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 Idaho today and book when prices fit your budget.

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