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Cheap flights from Idaho to Sydney from $802

BOI — SYD
18 Oct — 25 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

Wed 28/1013:57 -
1 stop22h 28m
Wed 4/1114:05 -
1 stop25h 35m
Deal found 13/9$1,125
Tue 20/1013:57 -
1 stop22h 28m
Tue 27/1011:10 -
1 stop20h 07m
Deal found 16/9$1,482
Wed 28/1014:51 -
1 stop24h 09m
Wed 4/1121:25 -
2 stops20h 31m
Deal found 13/9$1,488
Fri 20/1107:00 -
2 stops31h 35m
Thu 26/1111:20 -
2 stops42h 18m
Deal found 17/9$1,496
Fri 16/1019:46 -
2 stops42h 34m
Wed 25/1111:20 -
2 stops28h 37m
Deal found 17/9$1,513
Wed 28/1012:49 -
2 stops26h 11m
Wed 4/1120:30 -
2 stops34h 31m
Deal found 13/9$1,515
Sun 1/1107:00 -
2 stops31h 35m
Sat 21/1111:20 -
2 stops26h 21m
Deal found 16/9$1,530
Sun 18/1013:05 -
1 stop24h 50m
Tue 24/1111:50 -
1 stop17h 48m
Deal found 17/9$1,534
Sun 1/1106:20 -
2 stops34h 15m
Wed 4/1111:50 -
2 stops22h 52m
Deal found 13/9$1,685
Mon 19/1018:57 -
1 stop20h 08m
Wed 4/1121:25 -
1 stop18h 08m
Deal found 14/9$1,747
Sun 1/1110:13 -
1 stop26h 12m
Wed 4/1110:25 -
2 stops30h 33m
Deal found 13/9$1,762
Mon 19/1014:02 -
2 stops24h 28m
Wed 4/1111:10 -
2 stops26h 14m
Deal found 14/9$1,814

Find flight deals from Idaho to Sydney

Round-trip from

$1,125

One-way from

$802

Popular in

November

Cheapest in

March

Average price

$1,720
Qantas Airways
  • Qantas Airways
  • 28/10-4/11
  • 2 total stops
  • 48h 03m total
  • Idaho to Sydney
Search Deals
Delta
  • Delta
  • 19/1-31/12
  • 2 total stops
  • 22h 25m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($329 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($61 potential savings vs. average return price).
Search Deals
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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Price

Cheapest return flight

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Tue 19/1

15:05-08:30

2 stops22h 25m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$802

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Sat 6/3

06:00-06:25

2 stops30h 25m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$854

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Tue 3/11

14:03-06:25

2 stops22h 22m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$958
Fastest return journey

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Tue 3/11

19:30-09:00

1 stop19h 30m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$959

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Tue 19/1

18:13-20:50

3 stops31h 37m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,044

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 7/10

12:42-08:05

2 stops25h 23m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,082

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 7/10

05:10-07:50

2 stops32h 40m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,191

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Tue 19/1

18:13-21:50

3 stops32h 37m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,288

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 3/2

10:00-06:25

3 stops25h 25m

Sydney Kingsford Smith

Wed 17/2

21:25-22:57

2 stops20h 32m

$1,491

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Tue 16/2

12:36-06:25

2 stops22h 49m

Sydney Kingsford Smith

Tue 8/6

10:20-17:21

1 stop24h 01m

$1,492

Flights are sorted by cheapest return flights first.

Deals found on 17/9

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 20h 05m. 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
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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