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Cheap flights from Idaho to Sydney from $802

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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
15 Aug — 22 Aug1
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 16 July 2026.

Mon 2/1115:16
GEG
-
SYD
2 stops22h 44m
Multiple Airlines
Wed 11/1121:25
SYD
-
GEG
2 stops20h 26m
Multiple Airlines
Deal found 14/7$1,511
Wed 28/1012:44
GEG
-
SYD
2 stops23h 41m
Multiple Airlines
Wed 4/1121:25
SYD
-
GEG
2 stops20h 26m
Multiple Airlines
Deal found 13/7$1,514
Tue 3/1117:05
GEG
-
SYD
1 stop20h 55m
Multiple Airlines
Wed 11/1121:25
SYD
-
GEG
2 stops20h 26m
Multiple Airlines
Deal found 13/7$1,521
Mon 14/914:33
GEG
-
SYD
2 stops23h 57m
Multiple Airlines
Mon 21/917:50
SYD
-
GEG
1 stop36h 33m
Multiple Airlines
Deal found 12/7$1,524
Sun 9/806:20
GEG
-
SYD
1 stop32h 10m
Multiple Airlines
Sun 16/821:25
SYD
-
GEG
2 stops28h 01m
Multiple Airlines
Deal found 12/7$1,534
Wed 28/1014:51
GEG
-
SYD
1 stop24h 09m
Qantas Airways
Wed 4/1114:05
SYD
-
GEG
1 stop25h 50m
Qantas Airways
Deal found 13/7$1,544
Wed 2/1213:30
GEG
-
SYD
2 stops24h 00m
Delta
Tue 15/1210:40
SYD
-
GEG
2 stops27h 08m
Delta
Deal found 13/7$1,563
Sun 1/1107:05
GEG
-
SYD
2 stops28h 20m
Multiple Airlines
Sat 21/1111:15
SYD
-
GEG
1 stop30h 10m
Multiple Airlines
Deal found 11/7$1,596
Tue 18/816:35
BOI
-
SYD
2 stops34h 15m
Multiple Airlines
Sun 23/820:45
SYD
-
BOI
2 stops29h 07m
Multiple Airlines
Deal found 14/7$1,829
Fri 28/811:52
BOI
-
SYD
1 stop27h 03m
United Airlines
Fri 4/910:20
SYD
-
BOI
1 stop16h 46m
United Airlines
Deal found 14/7$1,840
Wed 30/906:25
BOI
-
SYD
2 stops32h 55m
Air Canada
Mon 5/1010:20
SYD
-
BOI
2 stops40h 14m
Air Canada
Deal found 13/7$1,877
Thu 30/708:03
BOI
-
SYD
1 stop31h 27m
Multiple Airlines
Mon 31/806:25
SYD
-
BOI
2 stops22h 08m
Multiple Airlines
Deal found 14/7$1,917

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 16 July 2026.

Round-trip from

$1,511

One-way from

$802

Popular in

November

Cheapest in

March

Average price

$1,946
3/11-11/11
  • 3/11-11/11
  • 4 total stops
  • 48h 32m total
  • Idaho to Sydney
Search Deals
26/8
  • 26/8
  • 2 total stops
  • 43h 06m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($267 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($64 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 16 July 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 - SYD

GEGSYD

Spokane

Mon 2/11

17:05-09:00

1 stop20h 55m

Sydney Kingsford Smith

Wed 11/11

14:05-20:55

1 stop25h 50m

$1,550

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 3/11

09:54-06:25

3 stops25h 31m

Sydney Kingsford Smith

Wed 11/11

21:25-22:56

2 stops20h 31m

$1,558

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 14/9

15:34-07:30

2 stops22h 56m

Sydney Kingsford Smith

Mon 21/9

17:50-22:25

2 stops21h 35m

$1,558

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 1/11

12:57-06:25

1 stop22h 28m

Sydney Kingsford Smith

Sat 21/11

11:15-22:25

1 stop30h 10m

$1,606

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 9/11

12:50-09:20

1 stop25h 30m

Sydney Kingsford Smith

Thu 12/11

11:50-10:41

1 stop17h 51m

$1,753

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

12:30-09:20

1 stop25h 50m

Sydney Kingsford Smith

Wed 16/12

11:20-15:19

2 stops22h 59m

$1,760

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 27/8

05:00-07:00

2 stops33h 00m

Sydney Kingsford Smith

Thu 3/9

10:20-10:30

1 stop17h 10m

$1,760

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 18/8

10:52-06:25

1 stop27h 33m

Sydney Kingsford Smith

Sun 23/8

21:25-22:27

1 stop17h 02m

$1,960

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 30/7

10:35-06:55

1 stop28h 20m

Sydney Kingsford Smith

Mon 31/8

10:20-09:35

2 stops39h 15m

$2,032

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 30/9

18:47-07:05

1 stop20h 18m

Sydney Kingsford Smith

Mon 5/10

21:50-22:57

2 stops42h 07m

$2,079

Flights are sorted by cheapest return flights first.

Deals found on 13/7

Showing 1-10 of 22 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
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 27h 33m. 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
Katoomba
Manly
Lithgow
Cronulla
Terrigal
Randwick
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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