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$512+ Cheap flights from Idaho to Sydney (SYD)

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
1 adult, Economy
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Cheap flight deals from Idaho to Sydney

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 June 21, 2026.

This Qantas Airways deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:05 pm
GEG
-
SYD
1 stop20h 55m
Multiple Airlines
Sat 11/2111:15 am
SYD
-
GEG
3 stops24h 59m
Multiple Airlines
Deal found 6/19$1,095
This Ovago deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/25:47 pm
GEG
-
SYD
1 stop20h 13m
Multiple Airlines
Wed 12/169:25 pm
SYD
-
GEG
1 stop37h 43m
Multiple Airlines
Deal found 6/20$1,101
This Qantas Airways deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/24:47 pm
GEG
-
SYD
1 stop18h 38m
Qantas Airways
Wed 12/162:05 pm
SYD
-
GEG
1 stop25h 52m
Qantas Airways
Deal found 6/17$1,115
This FlightHub deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am
GEG
-
SYD
2 stops31h 35m
Air Canada
Sat 11/2111:20 am
SYD
-
GEG
2 stops28h 41m
Air Canada
Deal found 6/20$1,136
This Qantas Airways deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:51 pm
BOI
-
SYD
1 stop20h 39m
Multiple Airlines
Wed 8/125:50 pm
SYD
-
BOI
1 stop20h 55m
Multiple Airlines
Deal found 6/21$1,184
This American Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/51:55 pm
BOI
-
SYD
2 stops25h 35m
American Airlines
Wed 8/129:10 am
SYD
-
BOI
2 stops23h 39m
American Airlines
Deal found 6/21$1,189
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:57 pm
BOI
-
SYD
2 stops24h 53m
Multiple Airlines
Tue 10/2711:15 am
SYD
-
BOI
1 stop18h 13m
Multiple Airlines
Deal found 6/18$1,213
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:57 pm
BOI
-
SYD
2 stops24h 53m
Multiple Airlines
Sun 10/2511:15 am
SYD
-
BOI
1 stop18h 13m
Multiple Airlines
Deal found 6/18$1,224
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:57 pm
BOI
-
SYD
2 stops24h 38m
Multiple Airlines
Mon 10/2611:15 am
SYD
-
BOI
1 stop18h 13m
Multiple Airlines
Deal found 6/18$1,235
This American Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/301:57 pm
BOI
-
SYD
2 stops25h 33m
American Airlines
Mon 8/3112:00 pm
SYD
-
BOI
1 stop26h 11m
American Airlines
Deal found 6/17$1,240
This oojo deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:57 pm
BOI
-
SYD
1 stop20h 08m
Qantas Airways
Tue 10/2711:15 am
SYD
-
BOI
1 stop18h 13m
Qantas Airways
Deal found 6/18$1,254
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:57 pm
BOI
-
SYD
2 stops24h 53m
Multiple Airlines
Sat 10/246:50 pm
SYD
-
BOI
1 stop21h 07m
Multiple Airlines
Deal found 6/18$1,278

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 June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,095
(Qantas Airways)

One-way from

$512
(Kiwi.com)

Popular in

November

Cheapest in

March

Average price

$1,315
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flights.
Search Deals
From Idaho to Sydney Kingsford Smith
Search Deals
One-way flight from Idaho to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($131 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated June 21, 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 round-trip

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 11/1

12:57 pm-6:25 am

2 stops22h 28m

Sydney Kingsford Smith

Sat 11/21

11:15 am-5:14 pm

3 stops24h 59m

$1,096

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 11/1

7:02 am-9:35 am

2 stops31h 33m

Sydney Kingsford Smith

Sat 11/21

11:20 am-12:40 pm

2 stops44h 20m

$1,219

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 12/2

4:47 pm-6:25 am

1 stop18h 38m

Sydney Kingsford Smith

Tue 12/15

2:05 pm-8:57 pm

1 stop25h 52m

$1,225
Quickest round-trip

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 8/8

12:30 pm-7:00 am

2 stops25h 30m

Sydney Kingsford Smith

Sat 8/15

10:20 am-10:30 am

1 stop17h 10m

$1,228

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 12/2

5:00 am-9:05 am

2 stops33h 05m

Sydney Kingsford Smith

Wed 12/16

11:20 am-9:09 pm

2 stops28h 49m

$1,232

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 12/2

5:00 am-7:00 am

2 stops31h 00m

Sydney Kingsford Smith

Tue 12/15

12:10 pm-11:24 am

1 stop18h 14m

$1,233

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 10/12

6:57 pm-12:50 pm

2 stops24h 53m

Sydney Kingsford Smith

Thu 10/22

6:50 pm-12:28 pm

1 stop34h 38m

$1,240

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 10/18

2:51 pm-7:55 am

1 stop24h 04m

Sydney Kingsford Smith

Tue 10/27

11:50 am-9:19 pm

1 stop26h 29m

$1,308

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 10/18

6:50 pm-7:55 am

1 stop20h 05m

Sydney Kingsford Smith

Sun 10/25

11:50 am-9:19 pm

1 stop26h 29m

$1,308

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 10/21

6:50 pm-7:55 am

1 stop20h 05m

Sydney Kingsford Smith

Wed 10/28

11:50 am-9:19 pm

1 stop26h 29m

$1,308

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

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 round-trip 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 to fly round-trip 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?

    If you book a flight to Sydney from Idaho, you will be flying to Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 4.6 mi from the center of Sydney.

  • How long is the flight from Idaho to Sydney?

    A quick flight from Idaho to Sydney can take about 24h 04m. Air Canada provides one of the quickest options available for as low as $1,308. Idaho and Sydney are separated by a distance of 7894 mi. This flight may include one or multiple 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 vacation 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

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Coogee
Manly

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Idaho to Sydney

Discover the top airline that operate flights from Idaho to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,247Average$1,454FlexibilityNo cancel feeOn-time69%

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