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Cheap flights from Idaho to Sydney from $887

BOI — SYD
28 Sep — 5 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 1/1107:00 -
2 stops31h 35m
Sat 21/1111:20 -
2 stops26h 21m
Deal found 24/8$1,513
Wed 2/1207:02 -
1 stop28h 18m
Tue 15/1211:50 -
1 stop18h 34m
Deal found 24/8$1,519
Sun 30/805:52 -
2 stops32h 28m
Sun 6/909:20 -
2 stops30h 51m
Deal found 25/8$1,523
Wed 2/1216:27 -
1 stop21h 03m
Wed 16/1210:40 -
2 stops29h 25m
Deal found 25/8$1,527
Wed 2/1212:30 -
1 stop25h 50m
Wed 16/1211:50 -
1 stop30h 48m
Deal found 25/8$1,530
Sun 30/805:20 -
2 stops32h 45m
Sun 6/912:00 -
1 stop25h 42m
Deal found 25/8$1,583
Sun 1/1116:24 -
1 stop21h 06m
Sat 21/1110:40 -
1 stop24h 05m
Deal found 24/8$1,588
Wed 28/1012:00 -
2 stops37h 15m
Wed 4/1109:55 -
2 stops31h 38m
Deal found 24/8$1,734
Wed 11/1112:00 -
2 stops30h 50m
Sun 22/1107:30 -
2 stops34h 03m
Deal found 25/8$1,754
Wed 23/918:47 -
1 stop20h 18m
Wed 30/917:50 -
1 stop21h 10m
Deal found 24/8$1,790
Wed 28/1014:02 -
2 stops25h 58m
Wed 4/1121:25 -
1 stop18h 08m
Deal found 24/8$1,808
Wed 14/1018:50 -
1 stop20h 05m
Mon 26/1011:50 -
1 stop26h 25m
Deal found 24/8$1,822

Find flight deals from Idaho to Sydney

Round-trip from

$1,468

One-way from

$887

Popular in

November

Cheapest in

March

Average price

$1,640
10/2-18/2
  • 10/2-18/2
  • 4 total stops
  • 49h 51m total
  • Idaho to Sydney
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13/10
  • 13/10
  • 2 total stops
  • 30h 53m 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).
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Cheapest flight prices on average. 2% potential price decrease ($60 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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Route

Depart

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Price

Cheapest return flight

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

$1,514

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 27/1

12:30-09:20

1 stop25h 50m

Sydney Kingsford Smith

Wed 10/2

11:50-11:24

1 stop18h 34m

$1,520

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Fri 19/2

16:47-06:25

1 stop18h 38m

Sydney Kingsford Smith

Mon 8/3

14:05-20:42

1 stop25h 37m

$1,584

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Sun 1/11

16:24-08:30

1 stop21h 06m

Sydney Kingsford Smith

Sat 21/11

10:40-15:45

1 stop24h 05m

$1,590

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

$1,590

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Thu 1/10

11:10-07:00

2 stops26h 50m

Sydney Kingsford Smith

Sun 1/11

11:50-22:11

2 stops28h 21m

$1,595

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Wed 23/9

18:47-07:05

1 stop20h 18m

Sydney Kingsford Smith

Wed 30/9

17:50-22:03

2 stops20h 13m

$1,822
Fastest return journey

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Wed 11/11

19:10-09:20

1 stop20h 10m

Sydney Kingsford Smith

Sun 22/11

11:50-11:19

1 stop17h 29m

$1,823

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Wed 14/10

18:50-07:55

1 stop20h 05m

Sydney Kingsford Smith

Fri 23/10

11:20-21:35

2 stops27h 15m

$1,898

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Sun 11/10

15:36-07:50

2 stops47h 14m

Sydney Kingsford Smith

Wed 21/10

10:15-17:59

2 stops24h 44m

$1,919

Flights are sorted by cheapest return flights first.

Deals found on 24/8

Showing 1-10 of 21 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 25h 50m. 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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