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Cheap flights from Idaho to Sydney from $686

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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
27 Jan — 3 Feb1
1 adult

Cheap flight deals from Idaho to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Idaho (USID) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 January 2025.

Round-trip from

$1,554

One-way from

$686
United Airlines
  • United Airlines
  • 6/3-20/3
  • 2 total stops
  • 41h 28m total
  • Idaho to Sydney
Search Deals
American Airlines
  • American Airlines
  • 6/2
  • 2 total stops
  • 24h 53m total
  • Idaho to Sydney
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 22 January 2025.

Thu 13/318:56BOI - SYD
1 stop21h 19mUnited Airlines
Mon 24/312:10SYD - BOI
1 stop21h 09mUnited Airlines
Deal found 22/1$1,622
Wed 14/513:45GEG - SYD
1 stop23h 50mDelta
Thu 12/609:25SYD - GEG
1 stop19h 46mDelta
Deal found 22/1$1,706
Thu 6/305:45BOI - SYD
2 stops32h 50mDelta
Thu 20/313:15SYD - BOI
2 stops27h 58mDelta
Deal found 21/1$1,744
Fri 7/313:40GEG - SYD
2 stops24h 35mUnited Airlines
Fri 14/312:10SYD - GEG
1 stop20h 20mUnited Airlines
Deal found 21/1$2,408
Fri 10/1019:00BOI - SYD
2 stops24h 45mMultiple Airlines
Sun 19/1010:10SYD - BOI
3 stops42h 54mMultiple Airlines
Deal found 20/1$2,813
Wed 14/513:25GEG - SYD
3 stops24h 10mMultiple Airlines
Thu 12/606:30SYD - GEG
3 stops25h 19mMultiple Airlines
Deal found 22/1$2,891
Fri 10/1019:00BOI - SYD
3 stops29h 50mAir Tahiti Nui
Sun 19/1010:10SYD - BOI
3 stops42h 54mAir Tahiti Nui
Deal found 20/1$3,610
Thu 13/306:00BOI - SYD
3 stops42h 55mSingapore Airlines
Mon 24/312:15SYD - BOI
2 stops41h 22mSingapore Airlines
Deal found 22/1$4,478
Mon 17/208:29BOI - SYD
3 stops31h 06mAir Canada
Fri 21/211:20SYD - BOI
2 stops28h 39mAir Canada
Deal found 20/1$4,680
Mon 17/213:23BOI - SYD
1 stop23h 12mAmerican Airlines
Fri 21/211:50SYD - BOI
1 stop28h 00mAmerican Airlines
Deal found 20/1$5,746
Thu 20/207:00GEG - SYD
1 stop29h 25mQantas Airways
Thu 27/212:40SYD - GEG
2 stops51h 58mQantas Airways
Deal found 21/1$6,296
Sat 31/513:43BOI - SYD
2 stops49h 02mLATAM Airlines
Mon 9/611:50SYD - BOI
3 stops40h 00mLATAM Airlines
Deal found 20/1$14,520

Find flights from Idaho to Sydney within your budget

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 22 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 6/3

05:45-08:35

2 stops32h 50m

Sydney Kingsford Smith

Thu 20/3

13:15-00:13

2 stops27h 58m

$1,744

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 17/2

14:36-09:05

2 stops24h 29m

Sydney Kingsford Smith

Fri 21/2

16:15-23:13

2 stops24h 58m

$1,845

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 1/3

11:25-08:35

2 stops26h 10m

Sydney Kingsford Smith

Sat 15/3

10:05-16:21

2 stops24h 16m

$1,859

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 7/3

13:40-09:15

2 stops24h 35m

Sydney Kingsford Smith

Fri 14/3

12:10-14:30

1 stop20h 20m

$2,408

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 7/3

07:00-07:35

3 stops53h 35m

Sydney Kingsford Smith

Fri 14/3

06:05-21:13

2 stops33h 08m

$3,669

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 17/2

08:29-09:35

3 stops31h 06m

Sydney Kingsford Smith

Fri 21/2

11:20-21:59

2 stops28h 39m

$4,680

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 6/3

13:31-13:00

3 stops29h 29m

Sydney Kingsford Smith

Thu 20/3

13:55-21:59

2 stops25h 04m

$4,842

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 17/2

13:23-06:35

1 stop23h 12m

Sydney Kingsford Smith

Fri 21/2

11:50-21:50

1 stop28h 00m

$5,746

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 17/2

08:00-07:40

3 stops53h 40m

Sydney Kingsford Smith

Fri 21/2

16:10-12:40

3 stops62h 30m

$6,190

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 20/2

07:00-07:25

1 stop29h 25m

Sydney Kingsford Smith

Thu 27/2

12:40-21:38

2 stops51h 58m

$6,296

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 18 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.

Travel insights for flights from Idaho to Sydney

Get recent, data-driven insights about flights from Idaho to Sydney including ideal travel times, pricing trends, and more.

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 22 January 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 22 January 2025.
See what other customers who have flown with United Airlines, Delta and LATAM Airlines from Idaho to Sydney have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very Good
1,328 reviews
Check prices

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Entertainment

8.0

Boarding

8.2

Reviews

1 / 10

Sin to amd was not good flight. Food was bad. It was like few days old.

Singapore Airlines
8.1
Very Good
1,328 reviews
Singapore Airlines
8.1
Very Good
1,328 reviews
Check prices

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Entertainment

8.0

Boarding

8.2

Reviews

1 / 10

Sin to amd was not good flight. Food was bad. It was like few days old.

Alaska Airlines
8.0
Very Good
9,706 reviews
Singapore Airlines
8.1
Very Good
1,328 reviews
Check prices

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Entertainment

8.0

Boarding

8.2

Reviews

1 / 10

Sin to amd was not good flight. Food was bad. It was like few days old.

Delta
8.0
Very Good
8,521 reviews
Singapore Airlines
8.1
Very Good
1,328 reviews
Check prices

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Entertainment

8.0

Boarding

8.2

Reviews

1 / 10

Sin to amd was not good flight. Food was bad. It was like few days old.

Air New Zealand
7.9
Good
483 reviews
Singapore Airlines
8.1
Very Good
1,328 reviews
Check prices

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Entertainment

8.0

Boarding

8.2

Reviews

1 / 10

Sin to amd was not good flight. Food was bad. It was like few days old.

Qantas Airways
7.5
Good
824 reviews
Singapore Airlines
8.1
Very Good
1,328 reviews
Check prices

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Entertainment

8.0

Boarding

8.2

Reviews

1 / 10

Sin to amd was not good flight. Food was bad. It was like few days old.

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?

    $686 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Alaska Airlines and United Airlines, with prices starting from $1,085 and $1,646, 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
Penrith
Katoomba
Randwick
Coogee
Manly
Cronulla
Bondi Beach
Terrigal
Lithgow
Leura
Swansea

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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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