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Cheap flights from Idaho to Sydney from $763

BOI — SYD
9 Oct — 16 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

Tue 20/1007:20 -
1 stop31h 10m
Tue 27/1014:00 -
2 stops25h 57m
Deal found 5/9$1,428
Fri 30/1007:00 -
2 stops31h 35m
Mon 16/1111:20 -
2 stops28h 37m
Deal found 4/9$1,507
Sun 1/1107:00 -
2 stops31h 35m
Sat 21/1111:20 -
2 stops26h 21m
Deal found 5/9$1,509
Wed 2/1212:30 -
1 stop22h 50m
Wed 16/1211:50 -
1 stop18h 34m
Deal found 7/9$1,513
Wed 2/1209:00 -
2 stops29h 20m
Tue 15/1211:50 -
1 stop18h 34m
Deal found 4/9$1,519
Thu 22/1014:51 -
2 stops24h 19m
Thu 29/1013:05 -
1 stop25h 38m
Deal found 7/9$1,578
Sun 1/1105:00 -
2 stops33h 05m
Sat 21/1111:50 -
1 stop25h 51m
Deal found 4/9$1,588
Thu 22/1018:57 -
2 stops44h 38m
Thu 29/1009:55 -
2 stops28h 25m
Deal found 7/9$1,725
Tue 27/1018:57 -
2 stops44h 38m
Thu 12/1109:55 -
2 stops29h 38m
Deal found 8/9$1,757
Tue 20/1018:57 -
1 stop20h 08m
Tue 27/1011:10 -
1 stop18h 18m
Deal found 5/9$1,780
Wed 28/1008:57 -
1 stop28h 28m
Thu 12/1106:55 -
2 stops34h 03m
Deal found 8/9$1,840
Mon 12/1018:50 -
1 stop20h 05m
Fri 23/1011:20 -
1 stop25h 09m
Deal found 6/9$1,884

Find flight deals from Idaho to Sydney

Round-trip from

$1,428

One-way from

$763

Popular in

November

Cheapest in

March

Average price

$1,695
20/10-27/10
  • 20/10-27/10
  • 3 total stops
  • 57h 07m total
  • Idaho to Sydney
Search Deals
14/2-31/12
  • 14/2-31/12
  • 1 total stop
  • 20h 13m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($320 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($60 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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Route

Depart

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Price

Cheapest return flight

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Sat 13/2

17:00-08:30

2 stops44h 30m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$817

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Thu 18/2

12:30-09:20

1 stop25h 50m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$873

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

$944

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Tue 3/11

07:00-06:25

1 stop29h 25m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$948
Fastest return journey

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 7/10

16:24-07:50

1 stop21h 26m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,106

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 7/10

13:57-18:50

2 stops34h 53m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,154

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 7/10

14:51-08:05

1 stop23h 14m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,165

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Tue 15/9

16:21-07:45

3 stops46h 24m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,235

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 7/10

05:00-07:55

2 stops32h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,259

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

12:30-06:20

1 stop22h 50m

Sydney Kingsford Smith

Wed 16/12

11:50-11:24

1 stop18h 34m

$1,513

Flights are sorted by cheapest return flights first.

Deals found on 5/9

Showing 1-10 of 19 resultsSorted by cheapest first
1
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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 29h 05m. Airlines will cover a distance of 12796 km.

  • 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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