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Cheap flights from Idaho to Sydney from $832

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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
5 Apr — 12 Apr1
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 31 March 2025.

Round-trip from

$1,760

One-way from

$832

Popular in

December

Cheapest in

May

Average price

$1,900
6/9-20/9
  • 6/9-20/9
  • 4 total stops
  • 52h 35m total
  • Idaho to Sydney
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 26/9
  • 2 total stops
  • 32h 30m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($717 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($191 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 31 March 2025.

Sat 6/919:14BOI - SYD
2 stops27h 26mMultiple Airlines
Sat 20/913:45SYD - BOI
2 stops25h 09mMultiple Airlines
Deal found 31/3$1,760
Thu 10/707:12BOI - SYD
2 stops31h 53mAlaska Airlines
Thu 21/809:10SYD - BOI
2 stops26h 28mAlaska Airlines
Deal found 30/3$1,835
Thu 31/718:49GEG - SYD
1 stop19h 16mAlaska Airlines
Sat 16/809:10SYD - GEG
2 stops31h 49mAlaska Airlines
Deal found 30/3$1,835
Mon 21/714:32GEG - SYD
1 stop23h 03mDelta
Mon 28/709:25SYD - GEG
1 stop21h 25mDelta
Deal found 31/3$2,012
Sun 14/912:35GEG - SYD
1 stop25h 20mUnited Airlines
Thu 25/910:20SYD - GEG
1 stop19h 49mUnited Airlines
Deal found 30/3$2,077
Tue 1/718:49GEG - SYD
1 stop19h 16mQantas Airways
Sat 19/709:10SYD - GEG
1 stop25h 37mQantas Airways
Deal found 30/3$2,090
Tue 30/1214:17BOI - SYD
2 stops23h 08mAmerican Airlines
Sun 15/214:30SYD - BOI
1 stop24h 39mAmerican Airlines
Deal found 30/3$2,110
Sat 27/1206:40GEG - SYD
2 stops34h 50mMultiple Airlines
Tue 30/1214:10SYD - GEG
2 stops27h 23mMultiple Airlines
Deal found 30/3$2,222
Fri 21/1105:52GEG - SYD
1 stop30h 03mAmerican Airlines
Fri 28/1117:25SYD - GEG
2 stops24h 36mAmerican Airlines
Deal found 30/3$2,269
Sat 5/716:40BOI - SYD
1 stop22h 20mUnited Airlines
Sat 19/710:20SYD - BOI
1 stop22h 20mUnited Airlines
Deal found 30/3$2,315
Sun 27/413:10BOI - SYD
1 stop25h 25mDelta
Fri 9/509:25SYD - BOI
1 stop21h 34mDelta
Deal found 31/3$2,489
Thu 15/506:30BOI - SYD
3 stops32h 50mAir Canada
Thu 22/509:20SYD - BOI
2 stops23h 17mAir Canada
Deal found 31/3$3,316

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 31 March 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

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 6/9

19:14-14:40

2 stops27h 26m

Sydney Kingsford Smith

Sat 20/9

13:45-22:54

2 stops25h 09m

$1,760

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 10/7

07:12-07:05

2 stops31h 53m

Sydney Kingsford Smith

Thu 21/8

09:10-19:38

2 stops26h 28m

$1,835

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 31/7

18:49-07:05

1 stop19h 16m

Sydney Kingsford Smith

Sat 16/8

09:10-23:59

2 stops31h 49m

$1,835

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 21/7

14:32-06:35

1 stop23h 03m

Sydney Kingsford Smith

Mon 28/7

09:25-13:50

1 stop21h 25m

$2,012

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 14/9

12:35-06:55

1 stop25h 20m

Sydney Kingsford Smith

Thu 25/9

10:20-13:09

1 stop19h 49m

$2,077

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 1/7

18:49-07:05

1 stop19h 16m

Sydney Kingsford Smith

Sat 19/7

09:10-17:47

1 stop25h 37m

$2,090

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 6/9

07:30-06:55

1 stop31h 25m

Sydney Kingsford Smith

Sat 20/9

12:10-21:14

1 stop25h 04m

$2,261

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 5/7

16:40-07:00

1 stop22h 20m

Sydney Kingsford Smith

Sat 19/7

10:20-16:40

1 stop22h 20m

$2,315

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 27/4

13:10-06:35

1 stop25h 25m

Sydney Kingsford Smith

Fri 9/5

09:25-14:59

1 stop21h 34m

$2,489

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 21/7

20:48-07:05

2 stops41h 17m

Sydney Kingsford Smith

Mon 28/7

17:50-17:47

3 stops40h 57m

$2,549

Flights are sorted by cheapest return flights first.

Deals found on 30/3

Showing 1-10 of 19 results
1
2

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 31 March 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.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

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 31 March 2025.
See what other customers who have flown with Air Tahiti Nui, Alaska Airlines and Delta from Idaho to Sydney have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Boarding

8.7

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
61 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Boarding

8.7

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
9,818 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Boarding

8.7

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
7,899 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Boarding

8.7

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
459 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Boarding

8.7

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
813 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Overall

8.7

Comfort

8.0

Entertainment

7.2

Food

7.8

Boarding

8.7

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.

  • 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
Randwick
Terrigal
Lithgow
Bondi Beach
Leura
Swansea

Browse thousands of different options on Cheapflights for your next trip

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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