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Cheap flights from Idaho to Sydney from $807

BOI — SYD
10 Oct — 17 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 1/1107:23 -
2 stops28h 02m
Tue 1/1211:15 -
2 stops23h 25m
Deal found 9/9$1,465
Sun 15/1108:22 -
2 stops30h 13m
Thu 19/1111:20 -
2 stops28h 37m
Deal found 10/9$1,469
Sun 1/1107:00 -
2 stops31h 35m
Sat 21/1111:20 -
2 stops26h 21m
Deal found 5/9$1,515
Wed 2/1212:30 -
1 stop22h 50m
Wed 16/1211:50 -
1 stop18h 34m
Deal found 7/9$1,519
Thu 22/1014:51 -
2 stops24h 19m
Thu 29/1013:05 -
1 stop25h 38m
Deal found 7/9$1,584
Sat 7/1119:10 -
2 stops43h 25m
Fri 13/1111:50 -
2 stops22h 52m
Deal found 10/9$1,666
Sun 8/1106:20 -
2 stops32h 15m
Sun 15/1111:50 -
2 stops22h 52m
Deal found 10/9$1,682
Thu 22/1018:57 -
2 stops44h 38m
Thu 29/1009:55 -
2 stops28h 25m
Deal found 7/9$1,732
Sat 7/1112:00 -
2 stops28h 35m
Sun 15/1111:50 -
2 stops27h 25m
Deal found 10/9$1,737
Sun 8/1106:20 -
2 stops32h 15m
Fri 13/1111:50 -
2 stops22h 52m
Deal found 10/9$1,748
Tue 27/1018:57 -
2 stops44h 38m
Thu 12/1109:55 -
2 stops29h 38m
Deal found 8/9$1,764
Tue 27/1018:57 -
2 stops44h 38m
Thu 12/1111:50 -
2 stops27h 43m
Deal found 9/9$1,778

Find flight deals from Idaho to Sydney

Round-trip from

$1,465

One-way from

$807

Popular in

November

Cheapest in

March

Average price

$1,701
1/11-1/12
  • 1/11-1/12
  • 4 total stops
  • 51h 27m total
  • Idaho to Sydney
Search Deals
19/2-31/12
  • 19/2-31/12
  • 2 total stops
  • 44h 25m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($323 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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Depart

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Price

Cheapest return flight

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Fri 19/2

16:00-06:25

2 stops44h 25m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$807
Fastest return journey

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

$947

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

$951

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

$1,138

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 7/10

07:05-07:50

2 stops30h 45m

Sydney Kingsford Smith

Wed 31/12

00:00-06:00

Nonstop0h 00m

$1,173

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

$1,264

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Sun 1/11

07:00-09:35

2 stops31h 35m

Sydney Kingsford Smith

Sat 21/11

11:20-18:41

2 stops26h 21m

$1,515

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

05:05-09:20

2 stops33h 15m

Sydney Kingsford Smith

Wed 16/12

11:50-17:57

2 stops25h 07m

$1,526

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

12:30-06:20

1 stop22h 50m

Sydney Kingsford Smith

Tue 15/12

13:20-21:09

2 stops26h 49m

$1,526

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

$1,547

Flights are sorted by cheapest return flights first.

Deals found on 9/9

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 29m. 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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