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$806+ Cheap flights from Sydney (SYD) to Idaho

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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — BOI
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheap flight deals from Sydney to Idaho

Keep the following information in mind while searching for Sydney to Idaho flight deals. Data was last updated October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,823
(Alaska Airlines)

One-way from

$806
(Trip.com)

Popular in

July

Cheapest in

October

Average price

$794
Provider with most accurate pricing for Sydney Kingsford Smith-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Boise Air Term. Gowen Fld flights.
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From Sydney Kingsford Smith to Idaho
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One-way flight from Sydney Kingsford Smith to Idaho
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Highest demand for flights based on searches. 3% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 29, 2025.

This Delta deal was found by Cheapflights users on 10/26. 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.
Tue 10/289:40 amSYD - BOI
1 stop22h 25mDelta
Sat 11/15:55 pmBOI - SYD
2 stops45h 35mDelta
Deal found 10/26$1,462
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Tue 10/285:45 pmSYD - BOI
2 stops60h 00mAmerican Airlines
Sat 11/14:40 pmBOI - SYD
2 stops47h 20mAmerican Airlines
Deal found 10/27$1,577
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Tue 10/2812:10 pmSYD - BOI
1 stop20h 53mUnited Airlines
Sat 11/12:11 pmBOI - SYD
1 stop25h 54mUnited Airlines
Deal found 10/26$1,629
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 12/129:40 pmSYD - BOI
2 stops35h 46mAlaska Airlines
Fri 12/197:15 amBOI - SYD
2 stops42h 30mAlaska Airlines
Deal found 10/28$1,823
This Qantas Airways deal was found by Cheapflights users on 10/27. 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 10/285:45 pmSYD - BOI
1 stop22h 17mQantas Airways
Sat 11/16:58 pmBOI - SYD
1 stop19h 27mQantas Airways
Deal found 10/27$2,193
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:40 pmSYD - BOI
2 stops20h 15mMultiple Airlines
Fri 12/199:06 pmBOI - SYD
1 stop40h 19mMultiple Airlines
Deal found 10/28$2,626
This American Airlines deal was found by Cheapflights users on 10/28. 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 12/122:05 pmSYD - BOI
1 stop26h 18mAmerican Airlines
Fri 12/197:00 amBOI - SYD
1 stop29h 55mAmerican Airlines
Deal found 10/28$2,912

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 October 29, 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

Fri 12/12

9:40 pm-3:26 pm

2 stops35h 46m

Boise Air Term. Gowen Fld

Fri 12/19

7:15 am-7:45 pm

2 stops42h 30m

$1,823

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Fri 12/12

9:40 pm-11:55 pm

2 stops20h 15m

Boise Air Term. Gowen Fld

Fri 12/19

9:06 pm-7:25 am

1 stop40h 19m

$2,626

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Fri 12/12

2:05 pm-10:23 pm

1 stop26h 18m

Boise Air Term. Gowen Fld

Fri 12/19

7:00 am-6:55 am

1 stop29h 55m

$2,912

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Sat 11/15

11:45 am-10:08 pm

2 stops28h 23m

$806

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Sat 11/15

12:10 pm-6:54 pm

1 stop24h 44m

$831

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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

How much does it cost to fly round-trip from Sydney to Idaho?

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 October 29, 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
8,999 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,999 reviews
United Airlines
7.4
Good
8,999 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 $2,912, Alaska Airlines can have you in Idaho from Sydney in 26h 18m. 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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Alternative routes for Sydney to Idaho

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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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,019Average$1,308FlexibilityNo cancel feeOn-time69%

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