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$1,500+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — BOI
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
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 December 15, 2025.

This Delta deal was found by Cheapflights users on 12/14. 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.
Sat 12/272:15 pmSYD - BOI
2 stops25h 41mDelta
Sun 1/42:08 pmBOI - SYD
1 stop24h 22mDelta
Deal found 12/14$1,655
This Delta deal was found by Cheapflights users on 12/13. 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 12/2110:40 amSYD - BOI
2 stops24h 59mDelta
Mon 1/57:25 amBOI - SYD
2 stops31h 05mDelta
Deal found 12/13$2,080
This Air Tahiti Nui deal was found by Cheapflights users on 12/14. 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 Tahiti Nui is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:15 pmSYD - BOI
3 stops45h 47mAir Tahiti Nui
Sun 1/47:00 amBOI - SYD
3 stops40h 40mAir Tahiti Nui
Deal found 12/14$2,985
This Cathay Pacific deal was found by Cheapflights users on 12/13. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2110:20 pmSYD - BOI
2 stops42h 42mMultiple Airlines
Mon 1/58:07 amBOI - SYD
3 stops39h 08mMultiple Airlines
Deal found 12/13$3,406
This KAYAK deal was found by Cheapflights users on 12/14. 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.
Sat 12/275:50 pmSYD - BOI
3 stops47h 12mMultiple Airlines
Sun 1/42:39 pmBOI - SYD
2 stops22h 46mMultiple Airlines
Deal found 12/14$3,909
This Singapore Airlines deal was found by Cheapflights users on 12/13. 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.
Sun 12/217:10 pmSYD - BOI
3 stops45h 20mSingapore Airlines
Mon 1/57:00 amBOI - SYD
3 stops40h 55mSingapore Airlines
Deal found 12/13$9,117

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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,500
(Air Canada)

Popular in

July

Cheapest in

October

Average price

$1,208
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 ($56 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 December 2025
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 December 15, 2025.
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

Wed 2/25

11:20 am-9:32 pm

2 stops28h 12m

Boise Air Term. Gowen Fld

Sun 3/1

5:24 pm-9:35 am

2 stops46h 11m

$1,500

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Wed 2/25

11:50 am-9:32 pm

2 stops27h 42m

Boise Air Term. Gowen Fld

Sun 3/1

6:55 pm-9:15 am

1 stop20h 20m

$1,612

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Sat 12/27

2:15 pm-9:56 pm

2 stops25h 41m

Boise Air Term. Gowen Fld

Sun 1/4

2:08 pm-8:30 am

1 stop24h 22m

$1,655

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Sun 12/21

10:40 am-1:27 pm

1 stop20h 47m

Boise Air Term. Gowen Fld

Mon 1/5

7:25 am-8:30 am

1 stop31h 05m

$2,080

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

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 December 15, 2025.
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
9,092 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

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 $1,612, Air Canada can have you in Idaho from Sydney in 27h 42m. 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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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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,019Average$1,308FlexibilityNo cancel feeOn-time69%

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