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Cheap flights from Idaho to Sydney from $832

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
8 Jul — 15 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 8 June 2026.

Sat 31/1014:51
GEG
-
SYD
2 stops26h 04m
Multiple Airlines
Wed 11/1114:05
SYD
-
GEG
1 stop25h 50m
Multiple Airlines
Deal found 8/6$1,615
Fri 5/613:50
GEG
-
SYD
1 stop23h 35m
Qantas Airways
Fri 12/617:30
SYD
-
GEG
2 stops21h 45m
Qantas Airways
Deal found 3/6$1,631
Thu 30/706:30
BOI
-
SYD
2 stops32h 50m
Air Canada
Mon 31/809:20
SYD
-
BOI
2 stops40h 15m
Air Canada
Deal found 3/6$1,672
Wed 2/1216:47
GEG
-
SYD
1 stop18h 23m
Qantas Airways
Wed 16/1206:00
SYD
-
GEG
2 stops33h 57m
Qantas Airways
Deal found 7/6$1,678
Sat 1/812:37
GEG
-
SYD
1 stop25h 18m
Air New Zealand
Sun 16/810:20
SYD
-
GEG
1 stop17h 10m
Air New Zealand
Deal found 3/6$1,695
Sat 1/812:49
GEG
-
SYD
1 stop25h 06m
American Airlines
Sun 16/817:50
SYD
-
GEG
2 stops22h 17m
American Airlines
Deal found 3/6$1,697
Sun 1/1107:02
GEG
-
SYD
2 stops31h 33m
Air Canada
Sat 21/1111:20
SYD
-
GEG
2 stops44h 20m
Air Canada
Deal found 7/6$1,731
Sat 31/1014:51
GEG
-
SYD
1 stop23h 09m
Qantas Airways
Wed 11/1114:05
SYD
-
GEG
1 stop25h 50m
Qantas Airways
Deal found 8/6$1,734
Wed 22/719:05
BOI
-
SYD
1 stop19h 50m
United Airlines
Wed 29/710:20
SYD
-
BOI
1 stop18h 48m
United Airlines
Deal found 7/6$1,835
Wed 1/719:05
BOI
-
SYD
1 stop19h 50m
United Airlines
Wed 8/710:20
SYD
-
BOI
1 stop18h 48m
United Airlines
Deal found 5/6$1,836
Fri 9/1006:25
BOI
-
SYD
2 stops32h 55m
Air Canada
Fri 23/1010:20
SYD
-
BOI
2 stops40h 13m
Air Canada
Deal found 6/6$1,868
Wed 22/719:05
BOI
-
SYD
2 stops44h 15m
Air Canada
Wed 29/709:20
SYD
-
BOI
2 stops30h 35m
Air Canada
Deal found 7/6$1,876

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 8 June 2026.

Round-trip from

$1,615

One-way from

$832

Popular in

December

Cheapest in

March

Average price

$1,910
31/10-11/11
  • 31/10-11/11
  • 3 total stops
  • 51h 54m total
  • Idaho to Sydney
Search Deals
7/10
  • 7/10
  • 2 total stops
  • 24h 42m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($264 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 June 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 8 June 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

Sat 31/10

14:51-10:55

2 stops26h 04m

Sydney Kingsford Smith

Wed 11/11

14:05-20:55

1 stop25h 50m

$1,615

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

06:30-07:20

2 stops32h 50m

Sydney Kingsford Smith

Mon 31/8

09:20-09:35

2 stops40h 15m

$1,672

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

16:47-06:10

1 stop18h 23m

Sydney Kingsford Smith

Wed 16/12

06:00-20:57

2 stops33h 57m

$1,678

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 31/10

14:51-08:00

1 stop23h 09m

Sydney Kingsford Smith

Wed 11/11

14:05-20:55

1 stop25h 50m

$1,734

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

16:47-06:10

1 stop18h 23m

Sydney Kingsford Smith

Wed 16/12

14:05-20:57

1 stop25h 52m

$1,740

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

12:30-09:15

1 stop25h 45m

Sydney Kingsford Smith

Tue 15/12

12:10-11:24

1 stop18h 14m

$1,744

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 12/8

12:40-06:55

1 stop25h 15m

Sydney Kingsford Smith

Sun 16/8

10:20-10:30

1 stop17h 10m

$1,744

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

15:05-09:00

2 stops22h 55m

Sydney Kingsford Smith

Wed 16/12

11:15-13:49

2 stops21h 34m

$1,746
Fastest return journey

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 22/7

19:05-06:55

1 stop19h 50m

Sydney Kingsford Smith

Wed 29/7

10:20-13:08

1 stop18h 48m

$1,835

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 1/7

14:41-06:55

2 stops24h 14m

Sydney Kingsford Smith

Wed 8/7

10:20-17:56

2 stops23h 36m

$1,842

Flights are sorted by cheapest return flights first.

Deals found on 8/6

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 18h 23m. 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
Katoomba
Cronulla
Manly
Terrigal
Lithgow
Randwick
Bondi Beach
Leura
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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