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Cheap flights from Idaho to Sydney from $737

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
24 Jul — 31 Jul1
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 24 June 2026.

Sun 1/1107:05
GEG
-
SYD
2 stops28h 20m
Multiple Airlines
Sat 21/1111:15
SYD
-
GEG
1 stop30h 10m
Multiple Airlines
Deal found 23/6$1,544
Wed 2/1217:47
GEG
-
SYD
1 stop20h 13m
Multiple Airlines
Wed 16/1221:25
SYD
-
GEG
1 stop37h 43m
Multiple Airlines
Deal found 23/6$1,584
Sat 8/806:20
GEG
-
SYD
1 stop32h 10m
Multiple Airlines
Sat 15/817:50
SYD
-
GEG
1 stop21h 25m
Multiple Airlines
Deal found 24/6$1,613
Sun 1/1107:00
GEG
-
SYD
2 stops31h 35m
Air Canada
Sat 21/1111:20
SYD
-
GEG
2 stops28h 41m
Air Canada
Deal found 23/6$1,636
Wed 5/818:51
BOI
-
SYD
1 stop20h 39m
Multiple Airlines
Wed 12/817:50
SYD
-
BOI
1 stop20h 55m
Multiple Airlines
Deal found 23/6$1,705
Wed 5/813:55
BOI
-
SYD
2 stops25h 35m
American Airlines
Wed 12/809:10
SYD
-
BOI
2 stops23h 39m
American Airlines
Deal found 23/6$1,711
Thu 30/713:57
BOI
-
SYD
2 stops25h 33m
American Airlines
Mon 31/812:00
SYD
-
BOI
1 stop26h 11m
American Airlines
Deal found 23/6$1,784
Tue 18/818:51
BOI
-
SYD
2 stops24h 59m
Multiple Airlines
Sun 23/817:50
SYD
-
BOI
1 stop34h 43m
Multiple Airlines
Deal found 23/6$1,841
Wed 30/914:44
BOI
-
SYD
2 stops24h 36m
Air Canada
Mon 5/1010:20
SYD
-
BOI
2 stops40h 14m
Air Canada
Deal found 24/6$1,892
Thu 30/706:30
BOI
-
SYD
2 stops32h 50m
Air Canada
Mon 31/809:20
SYD
-
BOI
2 stops28h 17m
Air Canada
Deal found 21/6$1,960
Thu 2/718:51
BOI
-
SYD
1 stop20h 39m
Multiple Airlines
Wed 8/721:50
SYD
-
BOI
2 stops40h 55m
Multiple Airlines
Deal found 23/6$1,967
Mon 24/807:05
BOI
-
SYD
2 stops34h 10m
Multiple Airlines
Tue 1/915:45
SYD
-
BOI
2 stops23h 15m
Multiple Airlines
Deal found 19/6$1,980

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 24 June 2026.

Round-trip from

$1,544

One-way from

$737

Popular in

November

Cheapest in

March

Average price

$1,894
1/11-21/11
  • 1/11-21/11
  • 3 total stops
  • 58h 30m total
  • Idaho to Sydney
Search Deals
2/9
  • 2/9
  • 3 total stops
  • 29h 33m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($270 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($65 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 24 June 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

Sun 1/11

12:57-06:25

2 stops22h 28m

Sydney Kingsford Smith

Sat 21/11

11:15-17:14

3 stops24h 59m

$1,578

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 1/11

07:00-09:35

2 stops31h 35m

Sydney Kingsford Smith

Sat 21/11

11:20-21:01

2 stops28h 41m

$1,636

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

16:47-06:25

1 stop18h 38m

Sydney Kingsford Smith

Wed 16/12

06:00-20:57

2 stops33h 57m

$1,694

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 5/8

18:51-07:30

1 stop20h 39m

Sydney Kingsford Smith

Wed 12/8

17:50-22:45

1 stop20h 55m

$1,705

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

16:47-06:25

1 stop18h 38m

Sydney Kingsford Smith

Tue 15/12

11:15-17:21

1 stop25h 06m

$1,754

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 14/9

16:21-07:30

1 stop22h 09m

Sydney Kingsford Smith

Wed 23/9

17:50-22:38

1 stop21h 48m

$1,763

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

07:00-08:45

2 stops30h 45m

Sydney Kingsford Smith

Wed 16/12

09:55-16:08

2 stops25h 13m

$1,769

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 8/8

12:37-06:55

1 stop25h 18m

Sydney Kingsford Smith

Sat 15/8

10:20-18:51

1 stop25h 31m

$1,769

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

07:02-06:20

1 stop28h 18m

Sydney Kingsford Smith

Tue 15/12

11:50-11:24

1 stop18h 34m

$1,769

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 2/12

05:00-09:05

2 stops33h 05m

Sydney Kingsford Smith

Wed 16/12

11:20-21:09

2 stops28h 49m

$1,774

Flights are sorted by cheapest return flights first.

Deals found on 19/6

Showing 1-10 of 23 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

How much does it cost for a return flight from Idaho to Sydney?

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 18h 38m. 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
Cronulla
Terrigal
Lithgow
Randwick
Bondi Beach
Leura
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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