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Cheap flights from Idaho to Sydney from $793

BOI — SYD
17 Sep — 24 Sep1
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

Wed 14/1015:37 -
2 stops22h 28m
Wed 28/1021:25 -
2 stops19h 28m
Deal found 15/8$1,518
Tue 10/1117:23 -
1 stop20h 37m
Wed 20/114:05 -
1 stop24h 37m
Deal found 16/8$1,522
Wed 16/916:21 -
1 stop21h 44m
Wed 23/917:50 -
1 stop21h 48m
Deal found 13/8$1,526
Wed 2/1207:02 -
1 stop28h 18m
Wed 16/1211:50 -
1 stop18h 34m
Deal found 17/8$1,533
Tue 10/1105:00 -
2 stops55h 00m
Wed 20/109:15 -
3 stops30h 54m
Deal found 16/8$1,560
Sun 1/1112:41 -
2 stops22h 44m
Sat 21/1111:15 -
2 stops26h 25m
Deal found 18/8$1,581
Tue 25/819:24 -
2 stops43h 06m
Tue 8/909:10 -
1 stop21h 13m
Deal found 14/8$1,589
Sat 17/1013:05 -
2 stops25h 15m
Sat 24/1010:20 -
2 stops28h 29m
Deal found 18/8$1,599
Tue 13/1020:22 -
2 stops29h 28m
Tue 20/1020:45 -
2 stops32h 43m
Deal found 16/8$1,820
Tue 13/1016:00 -
1 stop22h 50m
Wed 21/1010:15 -
1 stop21h 32m
Deal found 16/8$1,840
Mon 12/1008:59 -
2 stops29h 51m
Tue 20/1010:15 -
2 stops28h 53m
Deal found 16/8$1,847
Sun 11/1006:32 -
1 stop32h 23m
Wed 21/1011:20 -
1 stop25h 09m
Deal found 16/8$1,849

Find flight deals from Idaho to Sydney

Round-trip from

$1,518

One-way from

$793

Popular in

November

Cheapest in

March

Average price

$1,657
14/10-28/10
  • 14/10-28/10
  • 4 total stops
  • 41h 56m total
  • Idaho to Sydney
Search Deals
Qantas Airways
  • Qantas Airways
  • 18/10
  • 1 total stop
  • 22h 28m 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).
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Cheapest flight prices on average. 2% potential price decrease ($64 potential savings vs. average return price).
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Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Idaho to Sydney that are best for you.

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Cheapest return flight

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Sun 8/11

17:23-09:00

1 stop20h 37m

Sydney Kingsford Smith

Tue 17/11

14:05-20:40

1 stop25h 35m

$1,522

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

07:02-06:20

1 stop28h 18m

Sydney Kingsford Smith

Wed 16/12

11:50-11:24

1 stop18h 34m

$1,533

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 27/1

07:02-06:20

1 stop28h 18m

Sydney Kingsford Smith

Tue 9/2

11:50-11:24

1 stop18h 34m

$1,533

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 27/1

12:30-06:20

1 stop22h 50m

Sydney Kingsford Smith

Mon 8/2

11:50-11:24

1 stop18h 34m

$1,533

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

16:32-08:30

1 stop20h 58m

Sydney Kingsford Smith

Wed 16/12

10:40-21:08

2 stops29h 28m

$1,540

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

06:00-08:30

2 stops31h 30m

Sydney Kingsford Smith

Tue 15/12

10:40-12:29

2 stops20h 49m

$1,540

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 27/1

13:45-09:05

2 stops24h 20m

Sydney Kingsford Smith

Sun 7/2

09:15-21:09

2 stops30h 54m

$1,540

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

13:45-09:20

2 stops24h 35m

Sydney Kingsford Smith

Tue 15/12

11:50-11:24

1 stop18h 34m

$1,540

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 27/1

07:02-06:20

1 stop28h 18m

Sydney Kingsford Smith

Sat 13/2

11:50-11:24

1 stop18h 34m

$1,603

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Thu 1/10

13:05-06:55

1 stop24h 50m

Sydney Kingsford Smith

Sun 1/11

11:50-11:38

1 stop17h 48m

$1,603

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 29 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

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

  • 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 20h 37m. 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

Browse thousands of different options on Cheapflights for your next trip

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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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