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$1,064+ Cheap flights from Sydney (SYD) to Idaho

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — BOI
Apr 19 — Apr 261
Sun 4/19
Sun 4/26
1 adult, Economy
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Cheap flight deals from Sydney to Idaho

Cheapest flights from Sydney to Idaho
Explore the most affordable flight options available from Sydney to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 20, 2026.

This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:00 am
SYD
-
BOI
2 stops33h 01m
Multiple Airlines
Thu 5/78:11 am
BOI
-
SYD
2 stops45h 59m
Multiple Airlines
Deal found 3/16$1,064
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 4/3012:00 pm
SYD
-
BOI
1 stop40h 51m
American Airlines
Thu 5/76:26 pm
BOI
-
SYD
2 stops20h 39m
American Airlines
Deal found 3/16$1,077
This oojo deal was found by Cheapflights users on 3/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/175:50 pm
SYD
-
BOI
1 stop34h 35m
Multiple Airlines
Fri 4/247:14 pm
BOI
-
SYD
1 stop19h 51m
Multiple Airlines
Deal found 3/19$1,207
This Delta deal was found by Cheapflights users on 3/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/179:15 am
SYD
-
BOI
2 stops24h 07m
Delta
Fri 4/246:00 am
BOI
-
SYD
2 stops32h 50m
Delta
Deal found 3/19$1,210
This American Airlines deal was found by Cheapflights users on 3/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/175:50 pm
SYD
-
BOI
2 stops21h 51m
American Airlines
Fri 4/242:14 pm
BOI
-
SYD
2 stops24h 51m
American Airlines
Deal found 3/19$1,214
This Air Canada deal was found by Cheapflights users on 3/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/239:20 am
SYD
-
BOI
2 stops23h 28m
Air Canada
Sun 4/265:29 pm
BOI
-
SYD
2 stops45h 51m
Air Canada
Deal found 3/19$1,435
This KAYAK deal was found by Cheapflights users on 3/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/138:15 pm
SYD
-
BOI
2 stops32h 36m
Qantas Airways
Thu 4/306:26 pm
BOI
-
SYD
2 stops20h 39m
Qantas Airways
Deal found 3/18$1,553

Find flight deals from Sydney to Idaho

Keep the following information in mind while searching for Sydney to Idaho flight deals. Data was last updated March 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,064
(Trip.com)
Provider with most accurate pricing for Sydney Kingsford Smith-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Boise Air Term. Gowen Fld flights.
Search Deals
From Sydney Kingsford Smith to Idaho
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sydney to Idaho 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 20, 2026.
Use the filters below to find and compare flights from Sydney to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Thu 4/30

6:00 am-11:01 pm

2 stops33h 01m

Boise Air Term. Gowen Fld

Thu 5/7

8:11 am-10:10 pm

2 stops45h 59m

$1,064

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Fri 4/17

9:15 am-5:22 pm

2 stops24h 07m

Boise Air Term. Gowen Fld

Fri 4/24

6:00 am-6:50 am

2 stops32h 50m

$1,210

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Thu 4/23

9:20 am-4:48 pm

2 stops23h 28m

Boise Air Term. Gowen Fld

Sun 4/26

5:29 pm-7:20 am

2 stops45h 51m

$1,435

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Mon 4/13

8:15 pm-12:51 pm

2 stops32h 36m

Boise Air Term. Gowen Fld

Thu 4/30

6:26 pm-7:05 am

2 stops20h 39m

$1,553

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Fri 4/17

9:20 am-10:35 pm

2 stops29h 15m

Boise Air Term. Gowen Fld

Fri 4/24

6:15 am-7:20 am

3 stops57h 05m

$1,629

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Mon 4/13

8:45 pm-11:02 pm

2 stops42h 17m

Boise Air Term. Gowen Fld

Thu 4/30

7:14 pm-7:30 am

1 stop20h 16m

$1,704
Quickest round-trip

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Mon 4/13

5:30 pm-11:02 pm

2 stops21h 32m

Boise Air Term. Gowen Fld

Sun 4/26

7:14 pm-7:05 am

1 stop19h 51m

$1,792

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Thu 4/23

9:30 am-6:05 pm

2 stops24h 35m

Boise Air Term. Gowen Fld

Sun 4/26

2:37 pm-7:00 am

2 stops24h 23m

$1,798

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/16

Sorted by cheapest first

Best time to book a flight from Sydney to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Sydney 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 Sydney to Idaho
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 Sydney to Idaho. 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 from for flights from Sydney to Idaho?

    Located just 4.6 mi from the city center, Sydney Kingsford Smith (SYD) is the airport most travelers will use when flying to Idaho from Sydney.

  • How long is the flight from Sydney to Idaho?

    For as low as $1,435, American Airlines can have you in Idaho from Sydney in 23h 28m. The distance between Sydney and Idaho is about 7894 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Sydney to Idaho that include hotel bookings?

    Yes. In addition to deals on Sydney to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sydney to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sydney to Idaho.

  • Can I find deals for business class flights from Sydney to Idaho?

    Yes. Cheapflights offers flight deals from Sydney to Idaho 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

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