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Cheap flights from Idaho to Sydney from $799

BOI — SYD
23 Sep — 30 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

Mon 28/916:21 -
1 stop21h 44m
Wed 14/1013:00 -
1 stop25h 43m
Deal found 20/8$1,499
Tue 6/1012:42 -
2 stops23h 43m
Tue 13/1010:10 -
1 stop21h 07m
Deal found 22/8$1,506
Mon 28/913:53 -
2 stops24h 02m
Wed 14/1010:10 -
2 stops28h 33m
Deal found 20/8$1,510
Wed 2/1207:02 -
1 stop28h 18m
Wed 16/1211:50 -
1 stop18h 34m
Deal found 19/8$1,521
Wed 2/1212:30 -
1 stop25h 50m
Tue 15/1211:20 -
2 stops25h 37m
Deal found 21/8$1,527
Sun 1/1107:23 -
2 stops28h 02m
Sat 21/1111:15 -
2 stops26h 25m
Deal found 22/8$1,569
Tue 13/1020:22 -
2 stops29h 28m
Tue 20/1020:45 -
2 stops32h 43m
Deal found 21/8$1,806
Wed 14/1014:14 -
1 stop24h 41m
Mon 26/1011:50 -
1 stop21h 52m
Deal found 21/8$1,825
Wed 14/1018:50 -
1 stop20h 05m
Sun 25/1010:30 -
2 stops28h 02m
Deal found 21/8$1,831
Tue 13/1008:59 -
2 stops29h 51m
Tue 20/1010:15 -
1 stop21h 32m
Deal found 21/8$1,832
Mon 12/1008:49 -
2 stops54h 01m
Wed 21/1010:15 -
2 stops25h 18m
Deal found 20/8$1,850
Mon 19/1018:50 -
1 stop20h 05m
Sat 31/1019:25 -
2 stops46h 08m
Deal found 19/8$1,852

Find flight deals from Idaho to Sydney

Round-trip from

$1,499

One-way from

$799

Popular in

November

Cheapest in

March

Average price

$1,642
Qantas Airways
  • Qantas Airways
  • 28/9-14/10
  • 2 total stops
  • 47h 27m total
  • Idaho to Sydney
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19/10
  • 19/10
  • 2 total stops
  • 23h 52m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($324 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($60 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Idaho to Sydney that are best for you.

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Route

Depart

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Price

Cheapest return flight

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 27/1

12:30-09:20

1 stop25h 50m

Sydney Kingsford Smith

Wed 10/2

11:50-11:24

1 stop18h 34m

$1,521

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

$1,527

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

16:32-08:30

1 stop20h 58m

Sydney Kingsford Smith

Wed 16/12

10:40-21:08

2 stops29h 28m

$1,528

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 2/12

05:00-09:20

2 stops33h 20m

Sydney Kingsford Smith

Wed 16/12

11:50-21:09

2 stops28h 19m

$1,528

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Fri 19/2

16:47-06:25

1 stop18h 38m

Sydney Kingsford Smith

Mon 8/3

14:05-20:42

1 stop25h 37m

$1,587

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Wed 10/2

13:45-09:05

2 stops24h 20m

Sydney Kingsford Smith

Thu 18/2

11:50-15:19

2 stops22h 29m

$1,596

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Fri 19/2

12:30-06:20

1 stop22h 50m

Sydney Kingsford Smith

Mon 8/3

11:20-21:09

2 stops28h 49m

$1,598
Fastest return journey

SpokaneSydney

GEG Spokane - SYD Sydney Kingsford Smith

GEGSYD

Spokane

Thu 15/10

14:51-07:30

1 stop22h 39m

Sydney Kingsford Smith

Sat 31/10

11:10-13:17

1 stop20h 07m

$1,654

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Wed 14/10

14:44-08:00

2 stops24h 16m

Sydney Kingsford Smith

Sun 25/10

10:30-18:03

2 stops24h 33m

$1,831

BoiseSydney

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

BOISYD

Boise Air Term. Gowen Fld

Mon 19/10

14:44-07:55

2 stops24h 11m

Sydney Kingsford Smith

Mon 2/11

11:50-16:42

1 stop22h 52m

$1,832

Flights are sorted by cheapest return flights first.

Deals found on 24/8

Showing 1-10 of 24 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

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

  • 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 20h 58m. 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
Lithgow
Cronulla
Terrigal
Randwick
Leura
Bondi Beach
Coogee

Browse thousands of different options on Cheapflights for your next trip

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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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