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Cheap flights from Idaho to Sydney from $1,378

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
28 Feb — 7 Mar1
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 29 January 2026.

Thu 10/917:47
GEG
-
SYD
1 stop20h 18m
Multiple Airlines
Thu 17/917:50
SYD
-
GEG
1 stop21h 35m
Multiple Airlines
Deal found 26/1$1,378
Sun 1/1107:00
GEG
-
SYD
1 stop29h 25m
Multiple Airlines
Sat 21/1117:45
SYD
-
GEG
1 stop23h 40m
Multiple Airlines
Deal found 28/1$1,382
Tue 3/315:45
GEG
-
SYD
1 stop19h 25m
Qantas Airways
Tue 10/313:05
SYD
-
GEG
1 stop21h 49m
Qantas Airways
Deal found 26/1$1,384
Fri 3/713:07
GEG
-
SYD
1 stop24h 48m
Qantas Airways
Tue 7/712:00
SYD
-
GEG
1 stop25h 47m
Qantas Airways
Deal found 27/1$1,385
Fri 30/116:59
GEG
-
SYD
1 stop18h 11m
Multiple Airlines
Sun 1/214:05
SYD
-
GEG
1 stop23h 44m
Multiple Airlines
Deal found 26/1$1,386
Tue 10/216:59
GEG
-
SYD
1 stop18h 11m
Multiple Airlines
Fri 13/214:05
SYD
-
GEG
1 stop26h 07m
Multiple Airlines
Deal found 28/1$1,388
Tue 16/613:07
GEG
-
SYD
1 stop24h 48m
American Airlines
Wed 24/612:00
SYD
-
GEG
1 stop25h 47m
American Airlines
Deal found 27/1$1,389
Sun 1/1115:05
GEG
-
SYD
2 stops22h 55m
American Airlines
Sat 21/1114:05
SYD
-
GEG
1 stop25h 50m
American Airlines
Deal found 26/1$1,392
Tue 3/306:00
GEG
-
SYD
1 stop29h 55m
American Airlines
Tue 10/317:45
SYD
-
GEG
2 stops23h 29m
American Airlines
Deal found 26/1$1,394
Fri 3/715:00
GEG
-
SYD
2 stops23h 30m
American Airlines
Tue 7/717:50
SYD
-
GEG
2 stops22h 16m
American Airlines
Deal found 27/1$1,395
Fri 20/213:20
GEG
-
SYD
2 stops24h 10m
Delta
Fri 6/310:40
SYD
-
GEG
1 stop29h 38m
Delta
Deal found 27/1$1,404
Tue 3/306:25
GEG
-
SYD
1 stop29h 25m
Delta
Tue 10/313:15
SYD
-
GEG
1 stop26h 05m
Delta
Deal found 27/1$1,411

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 29 January 2026.

Round-trip from

$1,384

Popular in

December

Cheapest in

September
Qantas Airways
  • Qantas Airways
  • 3/3-10/3
  • 2 total stops
  • 41h 14m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($321 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($43 potential savings vs. average return price).
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 29 January 2026.
Use the filters below to find and compare flights from Idaho to Sydney that are best for you.

Fly from

Idaho

Fly to

Sydney

Route

Depart

Return

Price

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 3/3

15:45-06:10

1 stop19h 25m

Sydney Kingsford Smith

Tue 10/3

13:05-16:54

1 stop21h 49m

$1,384

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 10/2

16:59-06:10

1 stop18h 11m

Sydney Kingsford Smith

Fri 13/2

14:05-21:12

1 stop26h 07m

$1,388

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 20/2

15:45-06:10

1 stop19h 25m

Sydney Kingsford Smith

Fri 6/3

17:45-22:46

1 stop24h 01m

$1,392

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 10/2

06:00-06:55

1 stop29h 55m

Sydney Kingsford Smith

Fri 13/2

17:45-23:14

2 stops24h 29m

$1,395

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 16/6

15:00-07:30

2 stops23h 30m

Sydney Kingsford Smith

Wed 24/6

12:00-20:47

1 stop25h 47m

$1,395

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 3/7

15:00-07:30

2 stops23h 30m

Sydney Kingsford Smith

Tue 7/7

12:00-20:47

1 stop25h 47m

$1,395

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 20/2

13:20-08:30

2 stops24h 10m

Sydney Kingsford Smith

Fri 6/3

10:40-21:18

1 stop29h 38m

$1,404

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 3/3

06:25-06:50

1 stop29h 25m

Sydney Kingsford Smith

Tue 10/3

13:15-21:20

1 stop26h 05m

$1,411

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 16/6

14:45-06:50

1 stop23h 05m

Sydney Kingsford Smith

Mon 22/6

09:15-17:08

2 stops24h 53m

$1,418

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 18/2

12:42-09:00

2 stops26h 18m

Sydney Kingsford Smith

Sun 22/2

17:45-23:38

2 stops23h 53m

$1,722

Flights are sorted by cheapest return flights first.

Deals found on 26/1

Showing 1-10 of 12 results
1
2

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 19h 25m. 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
Terrigal
Lithgow
Leura
Coogee
Cronulla
Randwick
Bondi Beach

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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