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Cheap flights from Idaho to Sydney from $798

BOI — SYD
3 Oct — 10 Oct1
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

Sun 25/1013:57 -
1 stop22h 28m
Tue 10/1111:15 -
1 stop20h 20m
Deal found 30/8$1,515
Sun 1/1107:00 -
2 stops31h 35m
Sat 21/1111:20 -
2 stops26h 21m
Deal found 31/8$1,522
Wed 2/1212:30 -
1 stop25h 50m
Tue 15/1211:50 -
1 stop18h 34m
Deal found 2/9$1,527
Thu 3/905:12 -
2 stops33h 08m
Thu 10/909:20 -
2 stops30h 05m
Deal found 30/8$1,529
Wed 2/1205:05 -
2 stops30h 55m
Wed 16/1211:50 -
1 stop18h 34m
Deal found 2/9$1,534
Tue 13/1007:20 -
1 stop31h 10m
Wed 21/1014:15 -
2 stops25h 42m
Deal found 2/9$1,555
Mon 12/1007:20 -
1 stop31h 10m
Wed 21/1014:15 -
2 stops25h 42m
Deal found 2/9$1,563
Tue 13/1007:20 -
1 stop31h 10m
Fri 23/1014:15 -
2 stops25h 42m
Deal found 2/9$1,570
Mon 12/1007:20 -
1 stop31h 10m
Fri 23/1014:15 -
2 stops25h 42m
Deal found 2/9$1,577
Tue 13/1007:20 -
1 stop31h 10m
Thu 22/1014:15 -
2 stops25h 42m
Deal found 2/9$1,581
Mon 12/1007:20 -
1 stop31h 10m
Tue 20/1014:15 -
2 stops25h 42m
Deal found 2/9$1,590
Sun 1/1116:24 -
1 stop21h 06m
Sat 21/1110:40 -
1 stop24h 05m
Deal found 2/9$1,597

Find flight deals from Idaho to Sydney

Round-trip from

$1,508

One-way from

$798

Popular in

November

Cheapest in

March

Average price

$1,710
13/10-22/10
  • 13/10-22/10
  • 3 total stops
  • 56h 52m total
  • Idaho to Sydney
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15/11
  • 15/11
  • 2 total stops
  • 26h 12m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($325 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($61 potential savings vs. average return price).
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Average for round-trip flights in September 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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Route

Depart

Return

Price

Cheapest return flight

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

09:00-09:20

2 stops29h 20m

Sydney Kingsford Smith

Tue 15/12

11:50-11:24

1 stop18h 34m

$1,534

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

07:00-08:30

2 stops30h 30m

Sydney Kingsford Smith

Tue 15/12

10:40-21:05

2 stops29h 25m

$1,534

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

09:00-07:00

2 stops27h 00m

Sydney Kingsford Smith

Wed 16/12

09:15-17:57

2 stops27h 42m

$1,534

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Fri 19/2

12:30-06:20

1 stop22h 50m

Sydney Kingsford Smith

Mon 8/3

11:50-11:24

1 stop18h 34m

$1,597

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Fri 19/2

13:23-06:25

2 stops22h 02m

Sydney Kingsford Smith

Mon 8/3

14:05-20:42

1 stop25h 37m

$1,598

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Fri 19/2

13:30-08:30

2 stops24h 00m

Sydney Kingsford Smith

Mon 8/3

10:40-18:22

2 stops26h 42m

$1,604

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Sun 8/11

13:10-09:20

1 stop25h 10m

Sydney Kingsford Smith

Wed 11/11

11:50-18:41

1 stop25h 51m

$1,720

BoiseSydney

BOI Boise Air Term. Gowen Fld - SYD Sydney Kingsford Smith

BOISYD

Boise Air Term. Gowen Fld

Sun 31/1

13:01-06:35

1 stop23h 34m

Sydney Kingsford Smith

Sun 7/2

17:55-14:31

2 stops38h 36m

$1,836

BoiseSydney

BOI Boise Air Term. Gowen Fld - SYD Sydney Kingsford Smith

BOISYD

Boise Air Term. Gowen Fld

Mon 12/10

18:50-07:55

1 stop20h 05m

Sydney Kingsford Smith

Fri 23/10

11:20-19:29

1 stop25h 09m

$1,978
Fastest return journey

BoiseSydney

BOI Boise Air Term. Gowen Fld - SYD Sydney Kingsford Smith

BOISYD

Boise Air Term. Gowen Fld

Mon 12/10

18:57-07:30

1 stop19h 33m

Sydney Kingsford Smith

Mon 26/10

11:15-12:28

1 stop18h 13m

$2,036

Flights are sorted by cheapest return flights first.

Deals found on 29/8

Showing 1-10 of 24 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 23h 34m. 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
Manly
Katoomba
Lithgow
Cronulla
Terrigal
Leura
Randwick
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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