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Sydney

$627+ 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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Apr 18 — Apr 251
Sat 4/18
Sat 4/25
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 March 19, 2026.

This oojo deal was found by Cheapflights users on 3/14. 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.
Mon 4/136:12 pm
GEG
-
SYD
1 stop20h 18m
Multiple Airlines
Mon 4/205:50 pm
SYD
-
GEG
1 stop22h 02m
Multiple Airlines
Deal found 3/14$937
This oojo deal was found by Cheapflights users on 3/15. 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.
Mon 8/36:20 am
GEG
-
SYD
1 stop31h 45m
Multiple Airlines
Mon 8/105:50 pm
SYD
-
GEG
1 stop21h 28m
Multiple Airlines
Deal found 3/15$942
This Qantas Airways deal was found by Cheapflights users on 3/15. 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.
Tue 4/146:12 pm
GEG
-
SYD
1 stop20h 18m
Multiple Airlines
Tue 4/215:50 pm
SYD
-
GEG
1 stop22h 02m
Multiple Airlines
Deal found 3/15$952
This American Airlines deal was found by Cheapflights users on 3/15. 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.
Mon 8/33:00 pm
GEG
-
SYD
2 stops23h 05m
American Airlines
Mon 8/1012:00 pm
SYD
-
GEG
1 stop25h 47m
American Airlines
Deal found 3/15$956
This United Airlines deal was found by Cheapflights users on 3/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1312:35 pm
GEG
-
SYD
1 stop25h 20m
United Airlines
Mon 4/209:30 am
SYD
-
GEG
2 stops28h 41m
United Airlines
Deal found 3/14$960
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:20 am
GEG
-
SYD
1 stop31h 30m
Delta
Tue 4/219:15 am
SYD
-
GEG
2 stops31h 19m
Delta
Deal found 3/15$967
This oojo deal was found by Cheapflights users on 3/16. 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.
Thu 4/306:14 pm
GEG
-
SYD
1 stop19h 51m
Multiple Airlines
Thu 5/75:50 pm
SYD
-
GEG
1 stop21h 59m
Multiple Airlines
Deal found 3/16$1,034
This United Airlines deal was found by Cheapflights users on 3/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/51:41 pm
GEG
-
SYD
2 stops24h 19m
United Airlines
Fri 6/1210:20 am
SYD
-
GEG
1 stop25h 19m
United Airlines
Deal found 3/15$1,055
This American Airlines deal was found by Cheapflights users on 3/16. 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 4/301:20 pm
GEG
-
SYD
2 stops24h 45m
American Airlines
Thu 5/712:00 pm
SYD
-
GEG
1 stop25h 33m
American Airlines
Deal found 3/16$1,056
This oojo deal was found by Cheapflights users on 3/15. 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.
Mon 3/166:23 pm
GEG
-
SYD
1 stop20h 37m
Multiple Airlines
Wed 3/185:45 pm
SYD
-
GEG
1 stop23h 07m
Multiple Airlines
Deal found 3/15$1,057
This oojo deal was found by Cheapflights users on 3/15. 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.
Wed 7/16:20 am
GEG
-
SYD
1 stop31h 45m
Multiple Airlines
Wed 7/295:50 pm
SYD
-
GEG
1 stop21h 28m
Multiple Airlines
Deal found 3/15$1,065
This American Airlines deal was found by Cheapflights users on 3/16. 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 4/152:14 pm
BOI
-
SYD
2 stops25h 16m
American Airlines
Wed 4/229:10 am
SYD
-
BOI
2 stops24h 43m
American Airlines
Deal found 3/16$1,180

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 March 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$937
(oojo)

One-way from

$627
(American Airlines)

Popular in

March

Cheapest in

October

Average price

$1,523
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. 4% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 19, 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

Mon 4/13

12:35 pm-6:55 am

1 stop25h 20m

Sydney Kingsford Smith

Mon 4/20

9:30 am-9:11 pm

2 stops28h 41m

$960

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 4/14

5:05 am-7:00 am

2 stops32h 55m

Sydney Kingsford Smith

Tue 4/21

9:30 am-3:15 pm

2 stops22h 45m

$960

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 6/5

1:41 pm-7:00 am

2 stops24h 19m

Sydney Kingsford Smith

Fri 6/12

10:20 am-6:39 pm

1 stop25h 19m

$1,055

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 5/2

8:55 am-6:55 am

1 stop29h 00m

Sydney Kingsford Smith

Wed 5/6

10:20 am-11:16 am

1 stop17h 56m

$1,079

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 5/2

6:14 pm-7:05 am

1 stop19h 51m

Sydney Kingsford Smith

Wed 5/6

9:10 am-5:32 pm

1 stop25h 22m

$1,094

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 5/3

6:58 pm-6:55 am

1 stop19h 57m

Sydney Kingsford Smith

Sat 5/16

10:20 am-3:26 pm

1 stop21h 06m

$1,229

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 5/1

12:30 pm-6:55 am

1 stop26h 25m

Sydney Kingsford Smith

Fri 5/8

10:20 am-7:11 pm

1 stop24h 51m

$1,327
Quickest round-trip

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 7/30

6:51 pm-7:05 am

1 stop20h 14m

Sydney Kingsford Smith

Mon 8/31

9:10 am-1:44 pm

1 stop20h 34m

$1,334

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 4/25

7:03 pm-6:55 am

1 stop19h 52m

Sydney Kingsford Smith

Wed 4/29

10:20 am-4:48 pm

1 stop22h 28m

$1,379
Cheapest one-way
Quickest one-way

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 4/9

2:14 pm-7:30 am

2 stops25h 16m

$627

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/15

Showing 1-10 of 11 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 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 20h 14m. United Airlines provides one of the quickest options available for as low as $1,334. 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 2 airlines flying from Idaho to Sydney

Discover the top 2 airlines 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 March 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$987Average$1,296FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,094Average$1,454FlexibilityNo cancel feeOn-time69%

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