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$515+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
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 January 28, 2026.

This oojo deal was found by Cheapflights users on 1/26. 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 9/105:47 pm
GEG
-
SYD
1 stop20h 18m
Multiple Airlines
Thu 9/175:50 pm
SYD
-
GEG
1 stop21h 35m
Multiple Airlines
Deal found 1/26$965
This oojo deal was found by Cheapflights users on 1/27. 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.
Sun 11/17:00 am
GEG
-
SYD
1 stop29h 25m
Multiple Airlines
Sat 11/215:45 pm
SYD
-
GEG
1 stop23h 40m
Multiple Airlines
Deal found 1/27$968
This FlightHub deal was found by Cheapflights users on 1/25. 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.
Tue 3/33:45 pm
GEG
-
SYD
1 stop19h 25m
Qantas Airways
Tue 3/101:05 pm
SYD
-
GEG
1 stop21h 49m
Qantas Airways
Deal found 1/25$969
This FlightHub deal was found by Cheapflights users on 1/27. 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.
Fri 7/31:07 pm
GEG
-
SYD
1 stop24h 48m
Qantas Airways
Tue 7/712:00 pm
SYD
-
GEG
1 stop25h 47m
Qantas Airways
Deal found 1/27$970
This American Airlines deal was found by Cheapflights users on 1/26. 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.
Sun 11/15:25 am
GEG
-
SYD
1 stop30h 30m
American Airlines
Sat 11/212:05 pm
SYD
-
GEG
1 stop25h 50m
American Airlines
Deal found 1/26$971
This Qantas Airways deal was found by Cheapflights users on 1/28. 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 2/104:59 pm
GEG
-
SYD
1 stop18h 11m
Multiple Airlines
Fri 2/132:05 pm
SYD
-
GEG
1 stop26h 07m
Multiple Airlines
Deal found 1/28$972
This American Airlines deal was found by Cheapflights users on 1/27. 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.
Tue 6/161:07 pm
GEG
-
SYD
1 stop24h 48m
American Airlines
Wed 6/2412:00 pm
SYD
-
GEG
1 stop25h 47m
American Airlines
Deal found 1/27$973
This American Airlines deal was found by Cheapflights users on 1/26. 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.
Tue 3/36:00 am
GEG
-
SYD
1 stop29h 55m
American Airlines
Tue 3/105:45 pm
SYD
-
GEG
2 stops23h 29m
American Airlines
Deal found 1/26$976
This American Airlines deal was found by Cheapflights users on 1/27. 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.
Fri 7/33:00 pm
GEG
-
SYD
2 stops23h 30m
American Airlines
Tue 7/75:50 pm
SYD
-
GEG
2 stops22h 16m
American Airlines
Deal found 1/27$977
This Delta deal was found by Cheapflights users on 1/27. 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.
Fri 2/201:20 pm
GEG
-
SYD
2 stops24h 10m
Delta
Fri 3/610:40 am
SYD
-
GEG
1 stop29h 38m
Delta
Deal found 1/27$983
This Delta deal was found by Cheapflights users on 1/27. 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 3/36:25 am
GEG
-
SYD
1 stop29h 25m
Delta
Tue 3/101:15 pm
SYD
-
GEG
1 stop26h 05m
Delta
Deal found 1/27$988
This American Airlines deal was found by Cheapflights users on 1/25. 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 3/127:00 am
BOI
-
SYD
1 stop30h 55m
American Airlines
Thu 3/1910:00 pm
SYD
-
BOI
2 stops41h 23m
American Airlines
Deal found 1/25$1,164

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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$969
(FlightHub)

One-way from

$515
(SmartFares)

Popular in

December

Cheapest in

September
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. 11% potential increase in price ($157 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($22 potential savings vs. average RT price).
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 January 28, 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

3:45 pm-6:10 am

1 stop19h 25m

Sydney Kingsford Smith

Tue 3/10

1:05 pm-4:54 pm

1 stop21h 49m

$969

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 2/10

4:59 pm-6:10 am

1 stop18h 11m

Sydney Kingsford Smith

Fri 2/13

2:05 pm-9:12 pm

1 stop26h 07m

$972

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 3/21

3:10 pm-9:00 am

2 stops23h 50m

Sydney Kingsford Smith

Tue 3/31

6:50 pm-11:14 pm

2 stops22h 24m

$975

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 2/20

3:45 pm-6:10 am

1 stop19h 25m

Sydney Kingsford Smith

Fri 3/6

5:45 pm-10:46 pm

1 stop24h 01m

$975

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 2/10

6:00 am-6:55 am

1 stop29h 55m

Sydney Kingsford Smith

Fri 2/13

5:45 pm-11:14 pm

2 stops24h 29m

$977

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 6/16

3:00 pm-7:30 am

2 stops23h 30m

Sydney Kingsford Smith

Wed 6/24

12:00 pm-8:47 pm

1 stop25h 47m

$977

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 7/3

3:00 pm-7:30 am

2 stops23h 30m

Sydney Kingsford Smith

Tue 7/7

12:00 pm-8:47 pm

1 stop25h 47m

$977

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 2/20

1:20 pm-8:30 am

2 stops24h 10m

Sydney Kingsford Smith

Fri 3/6

10:40 am-9:18 pm

1 stop29h 38m

$983

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 3/3

6:25 am-6:50 am

1 stop29h 25m

Sydney Kingsford Smith

Tue 3/10

1:15 pm-9:20 pm

1 stop26h 05m

$988

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 3/12

7:00 am-6:55 am

1 stop30h 55m

Sydney Kingsford Smith

Thu 3/19

10:00 pm-10:23 pm

2 stops41h 23m

$1,164

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 18 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 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
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?

    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 19h 25m. Qantas Airways provides one of the quickest options available for as low as $969. Idaho and Sydney are separated by a distance of 7951 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
Manly

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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 January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$888Average$1,376FlexibilityNo cancel feeOn-time69%

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