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Idaho

$1,077+ 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 3/13. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — BOI
Mar 2 — Mar 91
Mon 3/2
Mon 3/9
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 January 31, 2026.

This American Airlines deal was found by Cheapflights users on 1/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1311:20 am
SYD
-
BOI
2 stops29h 18m
American Airlines
Tue 3/1712:31 pm
BOI
-
SYD
2 stops27h 29m
American Airlines
Deal found 1/30$1,077
This United Airlines deal was found by Cheapflights users on 1/30. 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.
Fri 3/132:00 pm
SYD
-
BOI
1 stop19h 49m
United Airlines
Tue 3/1710:49 am
BOI
-
SYD
1 stop29h 26m
United Airlines
Deal found 1/30$1,095
This Singapore Airlines deal was found by Cheapflights users on 1/30. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:10 pm
SYD
-
BOI
3 stops43h 49m
Singapore Airlines
Tue 3/177:07 am
BOI
-
SYD
3 stops41h 48m
Singapore Airlines
Deal found 1/30$4,309

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 January 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,001
(Trip.com)

Popular in

July

Cheapest in

October

Average price

$1,279
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
Highest demand for flights based on searches. 4% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 31, 2026.
Use the filters below to find and compare flights from Sydney to Idaho that are best for you.

Fly from

Sydney

Fly to

Idaho

Route

Depart

Return

Price

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Fri 3/13

11:20 am-11:38 pm

2 stops29h 18m

Boise Air Term. Gowen Fld

Tue 3/17

12:31 pm-9:00 am

2 stops27h 29m

$1,077

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Fri 3/13

2:00 pm-4:49 pm

1 stop19h 49m

Boise Air Term. Gowen Fld

Tue 3/17

10:49 am-9:15 am

1 stop29h 26m

$1,095

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Fri 3/13

7:10 pm-9:59 pm

3 stops43h 49m

Boise Air Term. Gowen Fld

Tue 3/17

7:07 am-5:55 pm

3 stops41h 48m

$4,309

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Mon 3/30

5:25 pm-11:56 pm

3 stops47h 31m

$2,855

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Sat 3/28

5:35 pm-11:56 pm

3 stops47h 21m

$2,871

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Wed 4/1

7:15 am-11:56 pm

3 stops33h 41m

$3,000

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Fri 4/3

5:25 pm-12:19 pm

3 stops59h 54m

$3,145

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Thu 4/2

12:45 pm-11:56 pm

3 stops52h 11m

$3,258

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Wed 4/1

12:50 pm-3:28 pm

2 stops43h 38m

$3,816

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Sun 3/29

12:15 pm-9:40 pm

2 stops50h 25m

$3,913

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 12 results
1
2

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.

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated January 31, 2026.
Read through reviews of airlines operating flights from Sydney to Idaho, such as United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,219 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,219 reviews
United Airlines
7.4
Good
9,219 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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 $1,077, American Airlines can have you in Idaho from Sydney in 29h 18m. The distance between Sydney and Idaho is about 7894 mi.

  • 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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Top airline flying from Sydney to Idaho

Discover the top airline that operate flights from Sydney to Idaho. 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 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,019Average$1,360FlexibilityNo cancel feeOn-time69%

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