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Cheap flights from Idaho to Sydney from $800

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
10 Sep — 17 Sep1
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
Explore the most affordable flight options available from Idaho to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 August 2026.

Wed 16/913:36 -
2 stops24h 54m
Wed 23/909:10 -
1 stop21h 13m
Deal found 7/8$1,505
Sat 24/1015:37 -
2 stops44h 48m
Tue 17/1111:15 -
1 stop20h 20m
Deal found 9/8$1,507
Sun 18/1014:51 -
1 stop23h 14m
Wed 28/1021:25 -
1 stop35h 57m
Deal found 7/8$1,515
Wed 2/1207:02 -
1 stop28h 18m
Wed 16/1211:50 -
1 stop18h 34m
Deal found 10/8$1,543
Wed 16/913:36 -
2 stops24h 54m
Wed 23/912:00 -
2 stops24h 39m
Deal found 7/8$1,545
Sun 18/1014:45 -
2 stops23h 20m
Wed 28/1011:10 -
2 stops27h 33m
Deal found 7/8$1,546
Wed 2/1213:45 -
2 stops24h 20m
Tue 15/1211:20 -
2 stops22h 59m
Deal found 10/8$1,549
Sun 6/916:20 -
2 stops21h 30m
Sun 20/909:15 -
2 stops24h 38m
Deal found 7/8$1,551
Sat 17/1019:20 -
2 stops42h 30m
Mon 26/1009:40 -
2 stops23h 10m
Deal found 7/8$1,569
Sat 15/815:16 -
2 stops22h 49m
Sat 22/809:10 -
1 stop30h 28m
Deal found 6/8$1,575
Sun 6/911:45 -
2 stops25h 40m
Thu 17/917:50 -
1 stop21h 48m
Deal found 7/8$1,577
Sun 18/1007:20 -
1 stop31h 10m
Sun 1/1114:00 -
2 stops41h 08m
Deal found 10/8$1,682

Find flight deals from Idaho to Sydney

Keep the following information in mind while searching for Idaho to Sydney flight deals. Data was last updated 11 August 2026.

Round-trip from

$1,505

One-way from

$800

Popular in

November

Cheapest in

March

Average price

$1,668
16/9-23/9
  • 16/9-23/9
  • 3 total stops
  • 46h 07m total
  • Idaho to Sydney
Search Deals
19/11
  • 19/11
  • 2 total stops
  • 29h 23m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($298 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($77 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Idaho to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 11 August 2026.
Use the filters below to find and compare flights from Idaho to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

07:02-06:20

1 stop28h 18m

Sydney Kingsford Smith

Wed 16/12

11:50-11:24

1 stop18h 34m

$1,543

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Tue 27/10

13:10-09:20

1 stop26h 10m

Sydney Kingsford Smith

Tue 17/11

11:50-18:41

1 stop25h 51m

$1,543

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

13:45-09:20

2 stops24h 35m

Sydney Kingsford Smith

Tue 15/12

11:50-11:24

1 stop18h 34m

$1,549

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Sat 24/10

19:20-07:30

2 stops42h 10m

Sydney Kingsford Smith

Mon 16/11

10:40-12:15

2 stops20h 35m

$1,569

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

$1,609

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Thu 10/9

16:21-10:20

2 stops24h 59m

Sydney Kingsford Smith

Thu 17/9

12:00-20:21

1 stop25h 21m

$1,610

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Thu 22/10

13:05-07:55

1 stop24h 50m

Sydney Kingsford Smith

Tue 17/11

11:50-10:38

1 stop17h 48m

$1,614
Fastest return journey

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Thu 1/10

13:38-06:55

2 stops24h 17m

Sydney Kingsford Smith

Sun 1/11

11:50-11:38

1 stop17h 48m

$1,614

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Sun 18/10

07:20-07:30

1 stop31h 10m

Sydney Kingsford Smith

Sun 1/11

14:00-14:08

2 stops41h 08m

$1,682

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Sun 18/10

18:50-07:55

1 stop20h 05m

Sydney Kingsford Smith

Mon 28/12

11:50-16:49

1 stop22h 59m

$1,852

Flights are sorted by cheapest return flights first.

Deals found on 7/8

Showing 1-10 of 21 resultsSorted by cheapest first
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3

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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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

Find useful and relevant information for your journey from Idaho to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 26h 23m. 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
Randwick
Terrigal
Leura
Bondi Beach
Coogee

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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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