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Cheap flights from Idaho to Sydney from $750

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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
15 juil. — 22 juil.1
1 adult

Cheap flight deals from Idaho to Sydney

Keep the following information in mind while searching for Idaho to Sydney flight deals. Data was last updated 10 juillet 2025.

Round-trip from

$1,318

One-way from

$750

Popular in

December

Cheapest in

May

Average price

$2,120
Qantas Airways
  • Qantas Airways
  • 31/7-16/8
  • 2 total stops
  • 45h 18m total
  • Idaho to Sydney
Search Deals
30/10
  • 30/10
  • 1 total stop
  • 22h 48m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($686 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($151 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find 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 10 juillet 2025.

jeu. 31/718:49GEG - SYD
1 stop19h 41mQantas Airways
sam. 16/809:10SYD - GEG
1 stop25h 37mQantas Airways
Deal found 9/7$1,318
sam. 23/806:25GEG - SYD
1 stop32h 05mMultiple Airlines
sam. 30/809:10SYD - GEG
1 stop30h 15mMultiple Airlines
Deal found 9/7$1,346
sam. 16/805:15GEG - SYD
2 stops32h 40mUnited Airlines
mer. 27/810:20SYD - GEG
1 stop17h 18mUnited Airlines
Deal found 8/7$1,373
mar. 4/1115:35GEG - SYD
2 stops22h 25mAmerican Airlines
lun. 17/1111:15SYD - GEG
2 stops20h 38mAmerican Airlines
Deal found 10/7$1,384
sam. 23/813:50BOI - SYD
2 stops25h 40mAmerican Airlines
sam. 30/809:10SYD - BOI
2 stops27h 00mAmerican Airlines
Deal found 9/7$1,465
ven. 22/805:00GEG - SYD
2 stops32h 35mDelta
ven. 29/809:25SYD - GEG
2 stops30h 05mDelta
Deal found 9/7$1,600
mer. 3/1209:00BOI - SYD
2 stops41h 15mMultiple Airlines
dim. 1/312:25SYD - BOI
2 stops27h 10mMultiple Airlines
Deal found 9/7$1,725
sam. 23/820:27BOI - SYD
1 stop18h 38mAlaska Airlines
sam. 30/809:10SYD - BOI
2 stops30h 49mAlaska Airlines
Deal found 9/7$1,771
jeu. 31/709:45GEG - SYD
2 stops28h 20mAlaska Airlines
sam. 16/809:10SYD - GEG
1 stop25h 37mAlaska Airlines
Deal found 9/7$1,860
mar. 18/1114:11BOI - SYD
2 stops24h 34mAir New Zealand
mer. 24/1213:55SYD - BOI
2 stops26h 27mAir New Zealand
Deal found 9/7$1,904
mar. 30/914:44BOI - SYD
1 stop24h 11mUnited Airlines
sam. 4/1010:20SYD - BOI
1 stop19h 28mUnited Airlines
Deal found 8/7$2,031
mar. 30/913:00BOI - SYD
2 stops25h 35mDelta
sam. 4/1009:25SYD - BOI
1 stop21h 39mDelta
Deal found 9/7$2,037

Cheapflights Fare Finder

Customise 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 647,157 searches. Data last updated 10 juillet 2025.
Use the filters below to find and compare flights from Idaho to Sydney that are best for you.

Fly from

Idaho

Fly to

Sydney

Route

Depart

Return

Price

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

jeu. 31/7

18:49-07:30

1 stop19h 41m

Sydney Kingsford Smith

sam. 16/8

09:10-17:47

1 stop25h 37m

$1,318

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

sam. 23/8

06:25-07:30

1 stop32h 05m

Sydney Kingsford Smith

sam. 30/8

09:10-22:25

1 stop30h 15m

$1,346

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

sam. 16/8

05:15-06:55

2 stops32h 40m

Sydney Kingsford Smith

mer. 27/8

10:20-10:38

1 stop17h 18m

$1,373

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mar. 4/11

15:35-09:00

2 stops22h 25m

Sydney Kingsford Smith

lun. 17/11

11:15-12:53

2 stops20h 38m

$1,384

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

sam. 23/8

13:50-07:30

2 stops25h 40m

Sydney Kingsford Smith

sam. 30/8

09:10-20:10

2 stops27h 00m

$1,465

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

ven. 22/8

05:00-06:35

2 stops32h 35m

Sydney Kingsford Smith

ven. 29/8

09:25-22:30

2 stops30h 05m

$1,600

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mer. 3/12

09:00-20:15

2 stops41h 15m

Sydney Kingsford Smith

dim. 1/3

12:25-21:35

2 stops27h 10m

$1,725

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

sam. 23/8

20:27-07:05

1 stop18h 38m

Sydney Kingsford Smith

sam. 30/8

09:10-23:59

2 stops30h 49m

$1,771

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

jeu. 31/7

09:45-07:05

2 stops28h 20m

Sydney Kingsford Smith

sam. 16/8

09:10-17:47

1 stop25h 37m

$1,860

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 18/11

14:11-08:45

2 stops24h 34m

Sydney Kingsford Smith

mer. 24/12

13:55-22:22

2 stops26h 27m

$1,904

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 22 results
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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 return 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

What is the cheapest month to book a flight from Idaho to Sydney?

Currently, May is the cheapest month in which you can book a flight from Idaho to Sydney (average of $129). Flying from Idaho to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to SYD?

Find hourly flight availability from Idaho to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 10 juillet 2025.

When flying from Idaho to Sydney, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated 10 juillet 2025.
Read reviews from past customers who have flown with Air Tahiti Nui, Alaska Airlines, andDelta from Idaho to Sydney. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Boarding

8.7

Entertainment

7.3

Crew

9.0

Comfort

8.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.7
Very Good
64 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Boarding

8.7

Entertainment

7.3

Crew

9.0

Comfort

8.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Alaska Airlines
8.0
Very Good
10,000 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Boarding

8.7

Entertainment

7.3

Crew

9.0

Comfort

8.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very Good
7,954 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Boarding

8.7

Entertainment

7.3

Crew

9.0

Comfort

8.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air New Zealand
8.0
Very Good
494 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Boarding

8.7

Entertainment

7.3

Crew

9.0

Comfort

8.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Qantas Airways
7.5
Good
873 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Boarding

8.7

Entertainment

7.3

Crew

9.0

Comfort

8.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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?

    Sydney Kingsford Smith (SYD), located 7.5 km from the city centre, is the airport you fly into when you book flights from Idaho to Sydney.

  • What are the cheapest airlines to fly from Idaho to Sydney one-way?

    $752 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $880 and $970, respectively.

  • 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 holiday 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.

  • What is the cheapest month to book a flight from Idaho to Sydney?

    Currently, May is the cheapest month in which you can book a flight from Idaho to Sydney (average of $129). Flying from Idaho to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Idaho?

Book flights to Idaho if you plan to visit one of these locations
Parramatta
Wollongong
Katoomba
Manly
Penrith
Coogee
Cronulla
Terrigal
Lithgow
Randwick
Bondi Beach
Leura

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Fly with Cheapflights

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How does Cheapflights help users find flights from Idaho to Sydney?

Cheapflights makes it easy to find Idaho to Sydney flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Idaho to Sydney?

Cheapflights helps you find that perfect flight to Sydney from Idaho by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Idaho to Sydney with no change fees?

Certainly. Search results for flights to Sydney from Idaho shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Idaho to Sydney become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Idaho today and book when prices fit your budget.

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