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Cheap flights from Idaho to Sydney from $908

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
21 Jun — 28 Jun1
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 22 May 2026.

Mon 25/507:00
GEG
-
SYD
1 stop31h 05m
Multiple Airlines
Wed 27/517:50
SYD
-
GEG
1 stop22h 02m
Multiple Airlines
Deal found 21/5$1,589
Sun 24/506:30
GEG
-
SYD
2 stops30h 55m
American Airlines
Sun 7/612:00
SYD
-
GEG
1 stop41h 01m
American Airlines
Deal found 20/5$1,606
Sun 24/512:37
GEG
-
SYD
1 stop25h 18m
United Airlines
Sun 7/610:20
SYD
-
GEG
1 stop25h 19m
United Airlines
Deal found 20/5$1,612
Wed 2/1216:47
GEG
-
SYD
1 stop18h 23m
Qantas Airways
Tue 15/1217:50
SYD
-
GEG
2 stops46h 07m
Qantas Airways
Deal found 18/5$1,623
Wed 2/1216:47
GEG
-
SYD
1 stop18h 23m
Qantas Airways
Wed 16/1219:15
SYD
-
GEG
2 stops41h 06m
Qantas Airways
Deal found 18/5$1,672
Wed 22/712:49
GEG
-
SYD
1 stop25h 06m
Multiple Airlines
Wed 29/709:10
SYD
-
GEG
1 stop19h 01m
Multiple Airlines
Deal found 22/5$1,694
Sun 1/1112:57
GEG
-
SYD
1 stop22h 13m
Multiple Airlines
Sat 21/1114:05
SYD
-
GEG
1 stop25h 50m
Multiple Airlines
Deal found 20/5$1,718
Sat 4/705:16
GEG
-
SYD
1 stop32h 39m
American Airlines
Sat 11/712:00
SYD
-
GEG
1 stop25h 42m
American Airlines
Deal found 20/5$1,720
Sun 1/1112:57
GEG
-
SYD
1 stop22h 13m
Multiple Airlines
Sat 7/1114:05
SYD
-
GEG
1 stop25h 50m
Multiple Airlines
Deal found 17/5$1,721
Wed 20/518:58
BOI
-
SYD
1 stop19h 57m
Air New Zealand
Wed 27/510:20
SYD
-
BOI
1 stop22h 24m
Air New Zealand
Deal found 19/5$1,812
Sun 1/1116:05
BOI
-
SYD
1 stop23h 10m
Air New Zealand
Sun 22/1112:10
SYD
-
BOI
1 stop20h 46m
Air New Zealand
Deal found 20/5$1,834
Sun 18/1014:45
BOI
-
SYD
1 stop24h 10m
United Airlines
Tue 3/1112:10
SYD
-
BOI
1 stop22h 39m
United Airlines
Deal found 19/5$1,836

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 22 May 2026.

Round-trip from

$1,718

One-way from

$908

Popular in

December

Cheapest in

March

Average price

$1,846
Qantas Airways
  • Qantas Airways
  • 1/11-21/11
  • 2 total stops
  • 48h 03m total
  • Idaho to Sydney
Search Deals
Delta
  • Delta
  • 7/10
  • 2 total stops
  • 28h 40m total
  • Idaho 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 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 22 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

Sun 1/11

12:57-06:10

1 stop22h 13m

Sydney Kingsford Smith

Sat 21/11

14:05-20:55

1 stop25h 50m

$1,718

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 4/7

05:16-06:55

1 stop32h 39m

Sydney Kingsford Smith

Sat 11/7

12:00-20:42

1 stop25h 42m

$1,720

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 1/11

12:57-06:10

1 stop22h 13m

Sydney Kingsford Smith

Sat 7/11

14:05-20:55

1 stop25h 50m

$1,721

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 2/6

16:09-07:30

1 stop22h 21m

Sydney Kingsford Smith

Mon 8/6

17:50-22:52

1 stop22h 02m

$1,721

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 14/8

13:04-06:55

1 stop24h 51m

Sydney Kingsford Smith

Tue 18/8

10:20-18:51

1 stop25h 31m

$1,722

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 4/6

12:37-06:55

1 stop25h 18m

Sydney Kingsford Smith

Wed 10/6

10:20-10:27

1 stop17h 07m

$1,722
Fastest return journey

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 15/6

19:25-06:55

1 stop18h 30m

Sydney Kingsford Smith

Sun 21/6

10:20-10:27

1 stop17h 07m

$1,725

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 1/11

12:30-09:15

1 stop25h 45m

Sydney Kingsford Smith

Sat 21/11

11:20-21:09

2 stops28h 49m

$1,728

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 1/11

14:43-09:15

2 stops24h 32m

Sydney Kingsford Smith

Sun 22/11

12:10-14:56

1 stop20h 46m

$1,836

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 18/10

19:05-07:55

1 stop19h 50m

Sydney Kingsford Smith

Tue 3/11

12:10-17:55

2 stops23h 45m

$1,841

Flights are sorted by cheapest return flights first.

Deals found on 21/5

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

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 24h 51m. 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
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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