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Cheap flights from Idaho to Sydney from $809

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
31 Jul — 7 Aug1
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 1 July 2026.

Wed 19/816:21
GEG
-
SYD
1 stop22h 09m
Qantas Airways
Wed 9/917:50
SYD
-
GEG
1 stop21h 48m
Qantas Airways
Deal found 27/6$1,518
Tue 22/916:21
GEG
-
SYD
1 stop22h 09m
Qantas Airways
Tue 6/1018:50
SYD
-
GEG
1 stop22h 45m
Qantas Airways
Deal found 28/6$1,545
Sun 9/806:20
GEG
-
SYD
1 stop32h 10m
Multiple Airlines
Sun 16/817:50
SYD
-
GEG
1 stop34h 21m
Multiple Airlines
Deal found 29/6$1,550
Wed 19/815:44
GEG
-
SYD
2 stops22h 46m
Multiple Airlines
Wed 9/917:50
SYD
-
GEG
2 stops21h 35m
Multiple Airlines
Deal found 27/6$1,553
Wed 29/713:26
GEG
-
SYD
3 stops25h 04m
Multiple Airlines
Wed 5/812:00
SYD
-
GEG
1 stop25h 42m
Multiple Airlines
Deal found 29/6$1,556
Thu 30/707:23
GEG
-
SYD
2 stops31h 07m
Multiple Airlines
Sat 15/817:50
SYD
-
GEG
1 stop34h 21m
Multiple Airlines
Deal found 28/6$1,566
Tue 22/916:21
GEG
-
SYD
1 stop21h 44m
Multiple Airlines
Tue 6/1018:50
SYD
-
GEG
2 stops21h 43m
Multiple Airlines
Deal found 28/6$1,578
Tue 11/818:51
BOI
-
SYD
1 stop20h 39m
Qantas Airways
Tue 18/817:50
SYD
-
BOI
1 stop20h 55m
Qantas Airways
Deal found 26/6$1,653
Mon 27/714:00
BOI
-
SYD
1 stop24h 55m
United Airlines
Mon 3/810:20
SYD
-
BOI
1 stop27h 20m
United Airlines
Deal found 28/6$1,720
Tue 11/813:55
BOI
-
SYD
2 stops25h 10m
American Airlines
Tue 18/817:50
SYD
-
BOI
2 stops20h 50m
American Airlines
Deal found 26/6$1,722
Wed 4/1110:13
BOI
-
SYD
1 stop26h 12m
Multiple Airlines
Wed 11/1107:00
SYD
-
BOI
2 stops24h 40m
Multiple Airlines
Deal found 28/6$1,735
Wed 1/707:00
BOI
-
SYD
1 stop32h 00m
United Airlines
Wed 15/709:30
SYD
-
BOI
1 stop28h 35m
United Airlines
Deal found 26/6$1,740

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 1 July 2026.

Round-trip from

$1,518

One-way from

$809

Popular in

November

Cheapest in

March

Average price

$1,974
Qantas Airways
  • Qantas Airways
  • 19/8-9/9
  • 2 total stops
  • 43h 57m total
  • Idaho to Sydney
Search Deals
7/10
  • 7/10
  • 2 total stops
  • 31h 30m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($275 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($65 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 1 July 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

Wed 19/8

16:21-07:30

1 stop22h 09m

Sydney Kingsford Smith

Wed 9/9

17:50-22:38

1 stop21h 48m

$1,518

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 19/8

15:44-07:30

2 stops22h 46m

Sydney Kingsford Smith

Wed 9/9

17:50-22:25

2 stops21h 35m

$1,553

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 29/7

13:26-07:30

3 stops25h 04m

Sydney Kingsford Smith

Wed 5/8

12:00-20:42

1 stop25h 42m

$1,556

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 21/9

16:21-07:30

1 stop22h 09m

Sydney Kingsford Smith

Mon 5/10

18:50-23:35

1 stop22h 45m

$1,572

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 22/9

16:21-07:05

1 stop21h 44m

Sydney Kingsford Smith

Tue 6/10

18:50-22:33

2 stops21h 43m

$1,578

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 30/7

16:21-07:30

2 stops22h 09m

Sydney Kingsford Smith

Sat 15/8

17:50-22:59

2 stops22h 09m

$1,579

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 27/7

14:00-06:55

1 stop24h 55m

Sydney Kingsford Smith

Mon 3/8

10:20-21:40

1 stop27h 20m

$1,720

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

07:02-06:20

1 stop28h 18m

Sydney Kingsford Smith

Tue 15/12

11:50-11:24

1 stop18h 34m

$1,778

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 17/8

12:33-06:55

1 stop25h 22m

Sydney Kingsford Smith

Fri 21/8

10:20-10:30

1 stop17h 10m

$1,778

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 13/8

18:51-07:05

1 stop20h 14m

Sydney Kingsford Smith

Thu 20/8

17:50-23:00

1 stop21h 10m

$1,858

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 21 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
No data available for this route at this time. Please check back soon.

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 22h 09m. Airlines will cover a distance of 12796 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
Manly
Katoomba
Lithgow
Cronulla
Terrigal
Randwick
Leura
Bondi Beach
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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