Find flights
When to book
FAQs

Cheap flights from Idaho to Sydney from $865

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 19/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags

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 16 January 2026.

Round-trip from

$1,441

One-way from

$865

Popular in

December

Cheapest in

September
3/3-10/3
  • 3/3-10/3
  • 2 total stops
  • 43h 48m total
  • Idaho to Sydney
Search Deals
19/2
  • 19/2
  • 3 total stops
  • 47h 04m total
  • Idaho to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($393 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($52 potential savings vs. average return price).
Search Deals

Find flight deals from Idaho to Sydney

Enter your travel dates to find the best prices.

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 16 January 2026.

Tue 3/315:45
GEG
-
SYD
1 stop19h 25m
Multiple Airlines
Tue 10/311:20
SYD
-
GEG
1 stop24h 23m
Multiple Airlines
Deal found 12/1$1,441
Tue 3/315:45
GEG
-
SYD
1 stop19h 25m
Qantas Airways
Wed 11/313:05
SYD
-
GEG
1 stop26h 07m
Qantas Airways
Deal found 13/1$1,445
Tue 20/116:59
GEG
-
SYD
1 stop18h 11m
Multiple Airlines
Sat 7/214:05
SYD
-
GEG
1 stop23h 44m
Multiple Airlines
Deal found 13/1$1,448
Sun 1/1105:25
GEG
-
SYD
1 stop30h 30m
American Airlines
Sat 21/1114:05
SYD
-
GEG
1 stop25h 50m
American Airlines
Deal found 12/1$1,450
Sun 26/413:20
GEG
-
SYD
2 stops24h 45m
American Airlines
Sat 2/509:10
SYD
-
GEG
2 stops30h 59m
American Airlines
Deal found 14/1$1,453
Tue 3/306:00
GEG
-
SYD
1 stop29h 55m
American Airlines
Tue 10/317:45
SYD
-
GEG
2 stops23h 29m
American Airlines
Deal found 12/1$1,456
Sat 25/418:14
GEG
-
SYD
1 stop19h 51m
Multiple Airlines
Sun 3/517:50
SYD
-
GEG
1 stop21h 59m
Multiple Airlines
Deal found 14/1$1,459
Sun 26/413:20
GEG
-
SYD
1 stop24h 05m
Multiple Airlines
Sun 3/517:50
SYD
-
GEG
1 stop21h 59m
Multiple Airlines
Deal found 14/1$1,460
Tue 20/106:29
GEG
-
SYD
1 stop29h 21m
Delta
Sat 7/314:15
SYD
-
GEG
1 stop26h 03m
Delta
Deal found 15/1$1,472
Wed 18/207:27
GEG
-
SYD
2 stops30h 03m
Delta
Thu 26/214:15
SYD
-
GEG
1 stop26h 03m
Delta
Deal found 13/1$1,478
Tue 20/106:05
GEG
-
SYD
2 stops31h 25m
Delta
Sat 7/214:15
SYD
-
GEG
1 stop26h 15m
Delta
Deal found 13/1$1,480
Mon 4/518:55
BOI
-
SYD
2 stops23h 45m
Multiple Airlines
Sun 17/511:55
SYD
-
BOI
2 stops21h 46m
Multiple Airlines
Deal found 14/1$1,722

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 16 January 2026.
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

Tue 3/3

15:45-06:10

1 stop19h 25m

Sydney Kingsford Smith

Tue 10/3

13:05-16:54

1 stop21h 49m

$1,445

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 3/3

15:45-06:10

1 stop19h 25m

Sydney Kingsford Smith

Wed 11/3

13:05-21:12

1 stop26h 07m

$1,445

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 23/2

18:23-09:00

1 stop19h 37m

Sydney Kingsford Smith

Wed 25/2

14:05-21:12

1 stop26h 07m

$1,454

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 3/3

06:00-06:55

1 stop29h 55m

Sydney Kingsford Smith

Wed 11/3

17:45-23:14

2 stops23h 29m

$1,456

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 27/4

18:14-07:05

1 stop19h 51m

Sydney Kingsford Smith

Sun 3/5

17:50-22:49

1 stop21h 59m

$1,459

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 3/3

05:00-06:50

2 stops30h 50m

Sydney Kingsford Smith

Wed 11/3

09:40-16:08

2 stops24h 28m

$1,478

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 27/2

05:00-08:30

2 stops32h 30m

Sydney Kingsford Smith

Fri 6/3

10:40-14:58

2 stops23h 18m

$1,478

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 18/2

07:27-08:30

2 stops30h 03m

Sydney Kingsford Smith

Thu 26/2

14:15-21:18

1 stop26h 03m

$1,478

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 3/3

13:20-06:50

2 stops22h 30m

Sydney Kingsford Smith

Tue 10/3

13:15-23:50

2 stops28h 35m

$1,478

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 25/4

15:29-06:35

2 stops22h 06m

Sydney Kingsford Smith

Sat 2/5

09:15-16:30

2 stops24h 15m

$1,480

Flights are sorted by cheapest return flights first.

Deals found on 15/1

Showing 1-10 of 29 results
1
2
3

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
No data available for this route at this time. Please check back soon.

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.

  • How long is the flight from Idaho to Sydney?

    Departing from Idaho to Sydney will take you 19h 25m. Airlines will cover a distance of 12796 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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.

See more FAQs

Travelling to a place near Sydney?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Sydney flights
Dallas/Fort Worth to Sydney flights
John F Kennedy Intl to Sydney flights
San Francisco to Sydney flights
Newark to Sydney flights
Honolulu to Sydney flights
O'Hare Intl to Sydney flights
Hobby to Sydney flights
Seattle to Sydney flights
Dulles Intl to Sydney flights
George Bush Intcntl to Sydney flights
Boston to Sydney flights
Baltimore to Sydney flights
Atlanta to Sydney flights
Reagan-National to Sydney flights
Midway to Sydney flights
Miami to Sydney flights
Detroit to Sydney flights
Philadelphia to Sydney flights
Sky Harbor Intl to Sydney flights
Orlando to Sydney flights
Denver to Sydney flights
Fort Lauderdale to Sydney flights
San Jose to Sydney flights
Charlotte to Sydney flights
San Diego to Sydney flights
Salt Lake City to Sydney flights
Oakland to Sydney flights
Minneapolis to Sydney flights
Love Field to Sydney flights
Indianapolis to Sydney flights
Austin to Sydney flights
Sacramento to Sydney flights
Memphis to Sydney flights
Portland to Sydney flights
Raleigh to Sydney flights
Las Vegas to Sydney flights
Omaha to Sydney flights
Pittsburgh to Sydney flights
Nashville to Sydney flights
St. Louis to Sydney flights
Cincinnati to Sydney flights
Tampa to Sydney flights
Kansas City to Sydney flights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.