Sydney

$644+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Jun 4 — Jun 111
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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 May 5, 2026.

This oojo deal was found by Cheapflights users on 5/1. 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 10/226:51 pm
BOI
-
SYD
1 stop20h 14m
Qantas Airways
Fri 10/307:05 am
SYD
-
BOI
2 stops23h 57m
Qantas Airways
Deal found 5/1$1,109
This Alaska Airlines deal was found by Cheapflights users on 5/4. 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.
Tue 9/87:00 am
GEG
-
SYD
1 stop31h 05m
Alaska Airlines
Thu 10/810:10 am
SYD
-
GEG
1 stop21h 07m
Alaska Airlines
Deal found 5/4$1,124
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 6/87:00 am
GEG
-
SYD
1 stop31h 05m
Alaska Airlines
Mon 6/229:10 am
SYD
-
GEG
1 stop30h 05m
Alaska Airlines
Deal found 4/30$1,134
This oojo deal was found by Cheapflights users on 5/4. 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 5/177:00 am
GEG
-
SYD
1 stop31h 30m
Multiple Airlines
Fri 6/129:10 am
SYD
-
GEG
1 stop19h 01m
Multiple Airlines
Deal found 5/4$1,199
This oojo deal was found by Cheapflights users on 5/1. 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 5/51:54 pm
GEG
-
SYD
1 stop24h 11m
Multiple Airlines
Thu 5/75:50 pm
SYD
-
GEG
1 stop21h 59m
Multiple Airlines
Deal found 5/1$1,214
This oojo deal was found by Cheapflights users on 5/1. 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 11/212:05 pm
SYD
-
GEG
1 stop25h 50m
Multiple Airlines
Deal found 5/1$1,215
This Delta deal was found by Cheapflights users on 5/4. 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.
Sun 5/175:35 am
GEG
-
SYD
2 stops32h 15m
Delta
Fri 6/129:15 am
SYD
-
GEG
1 stop23h 33m
Delta
Deal found 5/4$1,220
This oojo deal was found by Cheapflights users on 4/30. 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 6/1512:51 pm
GEG
-
SYD
1 stop25h 04m
Qantas Airways
Mon 6/2212:00 pm
SYD
-
GEG
1 stop25h 43m
Qantas Airways
Deal found 4/30$1,224
This United Airlines deal was found by Cheapflights users on 5/1. 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 8/812:37 pm
GEG
-
SYD
1 stop25h 18m
United Airlines
Wed 8/1210:20 am
SYD
-
GEG
1 stop17h 15m
United Airlines
Deal found 5/1$1,229
This United Airlines deal was found by Cheapflights users on 4/30. 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 4/30$1,230
This American Airlines deal was found by Cheapflights users on 5/4. 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 12/23:05 pm
GEG
-
SYD
2 stops22h 55m
American Airlines
Wed 12/1611:15 am
SYD
-
GEG
2 stops21h 34m
American Airlines
Deal found 5/4$1,231
This Qantas Airways deal was found by Cheapflights users on 4/30. 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 5/57:14 pm
BOI
-
SYD
1 stop20h 16m
Multiple Airlines
Thu 5/145:50 pm
SYD
-
BOI
1 stop21h 08m
Multiple Airlines
Deal found 4/30$1,248

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 May 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,109
(oojo)

One-way from

$644
(oojo)

Popular in

December

Cheapest in

March

Average price

$1,317
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flight deals.
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flights.
From Idaho to Sydney Kingsford Smith
One-way flight from Idaho to Sydney Kingsford Smith
Highest demand for flights based on searches. 9% potential increase in price ($131 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($19 potential savings vs. average RT price).
Average for round-trip flights in May 2026

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 May 5, 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

Tue 9/8

7:00 am-7:05 am

1 stop31h 05m

Sydney Kingsford Smith

Thu 10/8

10:10 am-1:17 pm

1 stop21h 07m

$1,124

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 6/8

7:00 am-7:05 am

1 stop31h 05m

Sydney Kingsford Smith

Mon 6/22

9:10 am-10:15 pm

1 stop30h 05m

$1,134

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 5/17

6:10 am-6:50 am

2 stops31h 40m

Sydney Kingsford Smith

Fri 6/12

9:15 am-11:55 pm

2 stops31h 40m

$1,220

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 6/15

12:51 pm-6:55 am

1 stop25h 04m

Sydney Kingsford Smith

Mon 6/22

12:00 pm-8:43 pm

1 stop25h 43m

$1,224

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 11/1

4:47 pm-6:10 am

1 stop18h 23m

Sydney Kingsford Smith

Sat 11/21

2:05 pm-8:55 pm

1 stop25h 50m

$1,226

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 11/1

5:00 am-7:00 am

2 stops31h 00m

Sydney Kingsford Smith

Sat 11/21

12:10 pm-11:24 am

1 stop18h 14m

$1,229

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 8/8

12:37 pm-6:55 am

1 stop25h 18m

Sydney Kingsford Smith

Wed 8/12

10:20 am-10:35 am

1 stop17h 15m

$1,229

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 11/1

3:05 pm-9:00 am

2 stops22h 55m

Sydney Kingsford Smith

Sat 11/21

11:15 am-1:55 pm

2 stops21h 40m

$1,230

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 5/27

3:14 pm-6:50 am

2 stops23h 36m

Sydney Kingsford Smith

Thu 6/4

9:15 am-10:11 pm

2 stops28h 56m

$1,258

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 5/27

3:23 pm-6:50 am

1 stop23h 27m

Sydney Kingsford Smith

Fri 6/5

9:15 am-5:50 pm

2 stops24h 35m

$1,258

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 18 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 25h 04m. Alaska Airlines provides one of the quickest options available for as low as $1,224. 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

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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 May 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,094Average$1,452FlexibilityNo cancel feeOn-time69%

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