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Cheap flights from Idaho to Sydney from $683

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
11 Apr — 18 Apr1
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 12 March 2026.

Thu 23/418:14
GEG
-
SYD
1 stop19h 51m
Qantas Airways
Thu 30/412:00
SYD
-
GEG
1 stop25h 33m
Qantas Airways
Deal found 9/3$1,330
Wed 22/418:14
GEG
-
SYD
1 stop20h 16m
Multiple Airlines
Wed 29/409:10
SYD
-
GEG
1 stop25h 22m
Multiple Airlines
Deal found 8/3$1,339
Sun 1/1117:47
GEG
-
SYD
1 stop20h 13m
Multiple Airlines
Sat 21/1111:15
SYD
-
GEG
1 stop30h 10m
Multiple Airlines
Deal found 9/3$1,348
Thu 23/418:14
GEG
-
SYD
1 stop19h 51m
Qantas Airways
Tue 5/512:00
SYD
-
GEG
1 stop21h 55m
Qantas Airways
Deal found 7/3$1,357
Sat 2/518:14
GEG
-
SYD
1 stop19h 51m
Qantas Airways
Wed 6/509:10
SYD
-
GEG
1 stop25h 22m
Qantas Airways
Deal found 9/3$1,431
Wed 22/413:46
GEG
-
SYD
2 stops24h 14m
United Airlines
Wed 29/410:20
SYD
-
GEG
1 stop25h 31m
United Airlines
Deal found 7/3$1,436
Sun 1/1115:05
GEG
-
SYD
2 stops22h 55m
American Airlines
Sat 21/1111:15
SYD
-
GEG
2 stops21h 40m
American Airlines
Deal found 9/3$1,438
Sat 2/505:00
GEG
-
SYD
2 stops33h 00m
United Airlines
Wed 6/510:20
SYD
-
GEG
1 stop17h 56m
United Airlines
Deal found 8/3$1,442
Wed 11/306:00
GEG
-
SYD
2 stops32h 15m
Qantas Airways
Thu 23/412:00
SYD
-
GEG
1 stop25h 33m
Qantas Airways
Deal found 9/3$1,488
Wed 11/307:02
GEG
-
SYD
1 stop29h 18m
United Airlines
Thu 23/410:20
SYD
-
GEG
1 stop18h 23m
United Airlines
Deal found 9/3$1,506
Tue 21/419:03
BOI
-
SYD
2 stops21h 42m
Air New Zealand
Tue 28/407:50
SYD
-
BOI
2 stops31h 11m
Air New Zealand
Deal found 7/3$1,524
Mon 4/512:30
BOI
-
SYD
2 stops28h 15m
Air New Zealand
Wed 20/509:55
SYD
-
BOI
2 stops23h 48m
Air New Zealand
Deal found 8/3$1,571

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 12 March 2026.

Round-trip from

$1,330

One-way from

$683

Popular in

March

Cheapest in

October

Average price

$2,128
Qantas Airways
  • Qantas Airways
  • 23/4-30/4
  • 2 total stops
  • 45h 24m total
  • Idaho to Sydney
Search Deals
22/4
  • 22/4
  • 2 total stops
  • 29h 30m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($113 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($40 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 12 March 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

Sat 2/5

18:14-07:05

1 stop19h 51m

Sydney Kingsford Smith

Wed 6/5

09:10-17:32

1 stop25h 22m

$1,431

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 22/4

13:46-07:00

2 stops24h 14m

Sydney Kingsford Smith

Wed 29/4

10:20-18:51

1 stop25h 31m

$1,436

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 23/4

13:46-06:55

2 stops24h 09m

Sydney Kingsford Smith

Tue 5/5

10:20-11:16

1 stop17h 56m

$1,436

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 2/5

05:00-06:55

2 stops32h 55m

Sydney Kingsford Smith

Wed 6/5

10:20-11:16

1 stop17h 56m

$1,442

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 8/4

06:25-06:50

1 stop31h 25m

Sydney Kingsford Smith

Wed 15/4

09:15-23:15

2 stops31h 00m

$1,520

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 4/5

12:30-08:45

2 stops28h 15m

Sydney Kingsford Smith

Wed 20/5

10:20-19:11

1 stop24h 51m

$1,727

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 24/5

15:40-06:50

1 stop23h 10m

Sydney Kingsford Smith

Sun 7/6

09:15-15:01

1 stop21h 46m

$1,828

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 25/5

15:23-06:50

1 stop23h 27m

Sydney Kingsford Smith

Mon 8/6

09:15-23:04

1 stop29h 49m

$1,835

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 23/5

15:23-06:50

1 stop23h 27m

Sydney Kingsford Smith

Sun 7/6

09:15-15:01

1 stop21h 46m

$1,842

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 22/5

12:51-06:50

2 stops25h 59m

Sydney Kingsford Smith

Tue 9/6

09:15-15:01

1 stop21h 46m

$1,849

Flights are sorted by cheapest return flights first.

Deals found on 7/3

Showing 1-10 of 19 resultsSorted by cheapest first
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

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 19h 51m. 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
Bondi Beach
Coogee
Cronulla
Leura
Randwick

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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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