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$562+ 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
May 21 — May 281
Thu 5/21
Thu 5/28
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 April 21, 2026.

This oojo deal was found by Cheapflights users on 4/16. 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.
Mon 6/14:09 pm
GEG
-
SYD
1 stop22h 21m
Multiple Airlines
Mon 6/89:10 am
SYD
-
GEG
1 stop23h 19m
Multiple Airlines
Deal found 4/16$1,091
This American Airlines deal was found by Cheapflights users on 4/16. 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.
Mon 6/112:51 pm
GEG
-
SYD
2 stops25h 14m
American Airlines
Mon 6/812:00 pm
SYD
-
GEG
1 stop25h 43m
American Airlines
Deal found 4/16$1,106
This Alaska Airlines deal was found by Cheapflights users on 4/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/44:09 pm
GEG
-
SYD
1 stop21h 56m
Alaska Airlines
Thu 6/119:10 am
SYD
-
GEG
1 stop30h 05m
Alaska Airlines
Deal found 4/20$1,124
This oojo deal was found by Cheapflights users on 4/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/44:09 pm
GEG
-
SYD
1 stop22h 21m
Multiple Airlines
Thu 6/119:10 am
SYD
-
GEG
1 stop19h 01m
Multiple Airlines
Deal found 4/20$1,214
This oojo deal was found by Cheapflights users on 4/16. 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.
Sun 11/14:47 pm
GEG
-
SYD
1 stop18h 23m
Multiple Airlines
Sat 11/2111:15 am
SYD
-
GEG
1 stop30h 10m
Multiple Airlines
Deal found 4/16$1,215
This American Airlines deal was found by Cheapflights users on 4/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/206:34 am
GEG
-
SYD
2 stops31h 31m
American Airlines
Tue 5/59:10 am
SYD
-
GEG
2 stops24h 45m
American Airlines
Deal found 4/18$1,217
This oojo deal was found by Cheapflights users on 4/18. 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.
Sat 6/612:51 pm
GEG
-
SYD
1 stop25h 04m
Multiple Airlines
Sat 6/139:10 am
SYD
-
GEG
1 stop30h 05m
Multiple Airlines
Deal found 4/18$1,222
This Alaska Airlines deal was found by Cheapflights users on 4/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:33 pm
BOI
-
SYD
1 stop19h 32m
Alaska Airlines
Tue 6/29:10 am
SYD
-
BOI
1 stop29h 48m
Alaska Airlines
Deal found 4/16$1,223
This United Airlines deal was found by Cheapflights users on 4/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:30 pm
GEG
-
SYD
1 stop25h 45m
United Airlines
Wed 11/1112:10 pm
SYD
-
GEG
1 stop18h 14m
United Airlines
Deal found 4/16$1,229
This United Airlines deal was found by Cheapflights users on 4/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:00 am
GEG
-
SYD
2 stops31h 00m
United Airlines
Sat 11/2112:10 pm
SYD
-
GEG
1 stop18h 14m
United Airlines
Deal found 4/20$1,230
This American Airlines deal was found by Cheapflights users on 4/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/13:05 pm
GEG
-
SYD
2 stops22h 55m
American Airlines
Sat 11/2111:15 am
SYD
-
GEG
2 stops21h 40m
American Airlines
Deal found 4/20$1,231
This United Airlines deal was found by Cheapflights users on 4/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/71:41 pm
GEG
-
SYD
2 stops24h 19m
United Airlines
Tue 8/1110:20 am
SYD
-
GEG
1 stop17h 15m
United Airlines
Deal found 4/17$1,234

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 April 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,091
(oojo)

One-way from

$562
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,270
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. 1% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 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

Mon 6/1

12:51 pm-7:05 am

2 stops25h 14m

Sydney Kingsford Smith

Mon 6/8

12:00 pm-8:43 pm

1 stop25h 43m

$1,106

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 6/4

4:09 pm-7:05 am

1 stop21h 56m

Sydney Kingsford Smith

Thu 6/11

9:10 am-10:15 pm

1 stop30h 05m

$1,124

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 6/4

4:09 pm-7:30 am

1 stop22h 21m

Sydney Kingsford Smith

Thu 6/11

9:10 am-11:11 am

1 stop19h 01m

$1,214

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 8/3

1:41 pm-7:00 am

2 stops24h 19m

Sydney Kingsford Smith

Fri 8/7

10:20 am-10:27 am

1 stop17h 07m

$1,230

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 8/7

12:37 pm-6:55 am

1 stop25h 18m

Sydney Kingsford Smith

Tue 8/11

10:20 am-10:35 am

1 stop17h 15m

$1,230

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 6/6

1:41 pm-7:00 am

2 stops24h 19m

Sydney Kingsford Smith

Sat 6/13

10:20 am-10:27 am

1 stop17h 07m

$1,230

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 6/21

2:05 pm-6:55 am

1 stop24h 50m

Sydney Kingsford Smith

Tue 6/30

10:20 am-4:44 pm

1 stop22h 24m

$1,317
Quickest round-trip

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 6/3

7:05 pm-6:55 am

1 stop19h 50m

Sydney Kingsford Smith

Wed 6/10

10:20 am-1:08 pm

1 stop18h 48m

$1,318

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 9/30

1:42 pm-7:30 am

2 stops25h 48m

Sydney Kingsford Smith

Mon 10/5

6:50 pm-11:32 pm

2 stops21h 42m

$1,319

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 5/20

2:14 pm-6:55 am

2 stops24h 41m

Sydney Kingsford Smith

Wed 5/27

9:10 am-5:09 pm

2 stops23h 59m

$1,319

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

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 21h 56m. American Airlines provides one of the quickest options available for as low as $1,124. 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
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 April 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$987Average$1,296FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,094Average$1,452FlexibilityNo cancel feeOn-time69%

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