What is the cheapest airline that flies from Idaho to Sydney Kingsford Smith?

United Airlines, Delta, and American Airlines are the most popular carriers operating from Idaho to Sydney Kingsford Smith

When did momondo last update prices for flights from Idaho to Sydney Kingsford Smith Airport?

Prices for flights from Idaho to Sydney Kingsford Smith Airport refresh daily.

How many operators does momondo search for flights from Idaho to Sydney Kingsford Smith Airport?

As of December 2025, there are 2 operators available to choose from for flights from Idaho to Sydney Kingsford Smith Airport.

How old do you have to be to fly from Idaho to Sydney Kingsford Smith Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Idaho to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$872 Cheap Flights from Idaho to Sydney in 2025/26

1 adult

0 bags

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Find the cheapest flights from Idaho to Sydney

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:15 pm - 7:05 am

GEG

SYD

20h 50m1 stop

9:10 am - 4:13 pm

SYD

GEG

24h 03m1 stop

$872Multiple Airlines

mié., abr. 29 - mar., may. 12

6:30 am - 6:50 am

GEG

SYD

29h 20m1 stop

1:15 pm - 9:20 pm

SYD

GEG

26h 05m1 stop

$879Delta

mar., mar. 3 - mar., mar. 10

9:55 am - 8:30 am

GEG

SYD

27h 35m2 stops

9:40 am - 1:00 pm

SYD

GEG

21h 20m2 stops

$884Delta

mar., mar. 3 - mar., mar. 10

6:00 am - 6:55 am

GEG

SYD

29h 55m1 stop

11:20 am - 2:58 pm

SYD

GEG

22h 38m2 stops

$919American Airlines

mié., ene. 28 - mié., feb. 4

5:00 am - 9:05 am

GEG

SYD

33h 05m2 stops

2:00 pm - 9:22 pm

SYD

GEG

26h 22m2 stops

$924United Airlines

mié., ene. 28 - mié., feb. 4

6:00 am - 6:55 am

GEG

SYD

29h 55m1 stop

11:20 am - 4:19 pm

SYD

GEG

23h 59m1 stop

$930Multiple Airlines

mié., ene. 28 - mié., feb. 4

6:53 am - 6:20 am

GEG

SYD

28h 27m1 stop

12:10 pm - 7:16 pm

SYD

GEG

26h 06m1 stop

$1,107United Airlines

jue., feb. 5 - lun., feb. 9

7:02 pm - 9:00 am

BOI

SYD

19h 58m1 stop

11:20 am - 1:35 pm

SYD

BOI

20h 15m1 stop

$1,267Alaska Airlines

jue., feb. 5 - lun., feb. 9

1:27 pm - 11:55 am

BOI

SYD

28h 28m2 stops

7:15 pm - 10:36 pm

SYD

BOI

45h 21m2 stops

$1,527Qantas Airways

mar., dic. 30 - dom., feb. 15

1:27 pm - 2:50 pm

BOI

SYD

31h 23m2 stops

7:15 pm - 10:36 pm

SYD

BOI

45h 21m2 stops

$1,529Qantas Airways

mar., dic. 30 - dom., feb. 15

United Airlines flights from Idaho to Sydney

Our best United Airlines deals on Idaho to Sydney flight tickets

United Airlines

Jan 28

GEG5:00 amSpokane

33h 05m

2 stops

SYD9:05 amSydney Kingsford Smith

Feb 4

SYD2:00 pmSydney Kingsford Smith

26h 22m

2 stops

GEG9:22 pmSpokane

$924

Find similar

United Airlines

Feb 5

GEG12:24 pmSpokane

22h 56m

1 stop

SYD6:20 amSydney Kingsford Smith

Feb 9

SYD12:10 pmSydney Kingsford Smith

26h 06m

1 stop

GEG7:16 pmSpokane

$1,107

Find similar

United Airlines

Feb 5

GEG1:48 pmSpokane

24h 27m

2 stops

SYD9:15 amSydney Kingsford Smith

Feb 9

SYD12:10 pmSydney Kingsford Smith

17h 34m

1 stop

GEG10:44 amSpokane

$1,112

Find similar

Delta flights from Idaho to Sydney

Our best Delta deals on Idaho to Sydney flight tickets

Delta

Mar 3

GEG6:30 amSpokane

29h 20m

1 stop

SYD6:50 amSydney Kingsford Smith

Mar 10

SYD1:15 pmSydney Kingsford Smith

26h 05m

1 stop

GEG9:20 pmSpokane

$879

Find similar

Delta

Mar 3

GEG3:40 pmSpokane

21h 50m

2 stops

SYD8:30 amSydney Kingsford Smith

Mar 10

SYD1:15 pmSydney Kingsford Smith

26h 05m

1 stop

GEG9:20 pmSpokane

$884

Find similar

Delta

Dec 30

BOI2:08 pmBoise Air Term. Gowen Fld

22h 42m

1 stop

SYD6:50 amSydney Kingsford Smith

Feb 15

SYD10:40 amSydney Kingsford Smith

27h 30m

2 stops

BOI8:10 pmBoise Air Term. Gowen Fld

$1,578

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mié. 4/29

5:15 pm-7:05 am

1 stop20h 50m

Sydney Kingsford Smith

mar. 5/12

9:10 am-4:13 pm

1 stop24h 03m

$872

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mar. 3/3

6:30 am-6:50 am

1 stop29h 20m

Sydney Kingsford Smith

mar. 3/10

1:15 pm-9:20 pm

1 stop26h 05m

$879

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mar. 3/3

9:55 am-8:30 am

2 stops27h 35m

Sydney Kingsford Smith

mar. 3/10

9:40 am-1:00 pm

2 stops21h 20m

$884

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mié. 1/28

6:00 am-6:55 am

1 stop29h 55m

Sydney Kingsford Smith

mié. 2/4

11:20 am-2:58 pm

2 stops22h 38m

$919

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mié. 1/28

5:00 am-9:05 am

2 stops33h 05m

Sydney Kingsford Smith

mié. 2/4

2:00 pm-9:22 pm

2 stops26h 22m

$924

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mié. 1/28

6:00 am-6:55 am

1 stop29h 55m

Sydney Kingsford Smith

mié. 2/4

11:20 am-4:19 pm

1 stop23h 59m

$930

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

jue. 2/5

6:53 am-6:20 am

1 stop28h 27m

Sydney Kingsford Smith

lun. 2/9

12:10 pm-7:16 pm

1 stop26h 06m

$1,107

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

jue. 2/5

7:02 pm-9:00 am

1 stop19h 58m

Sydney Kingsford Smith

lun. 2/9

11:20 am-1:35 pm

1 stop20h 15m

$1,267

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 12/30

1:27 pm-11:55 am

2 stops28h 28m

Sydney Kingsford Smith

dom. 2/15

7:15 pm-10:36 pm

2 stops45h 21m

$1,527

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 12/30

1:27 pm-2:50 pm

2 stops31h 23m

Sydney Kingsford Smith

dom. 2/15

7:15 pm-10:36 pm

2 stops45h 21m

$1,529

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Sydney?

In general, September is the cheapest month to fly from Idaho to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $963. If you are unable to visit Sydney during the month of September, then departing from Idaho during the month May is also very affordable. Most momondo users find prices during this month for around $989.

What is the cheapest day to depart on your flight to Sydney?

The cheapest day to depart from Idaho to Sydney is on a Sunday when prices can be found for as low as $1,164. The most expensive day to fly to Sydney is Tuesday, with ticket prices averaging around $1,529.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the afternoon. momondo users have found flights departing from Idaho to Sydney in the afternoon for as low as $1,311. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the evening, with an average ticket price of $1,539. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Idaho to Sydney flights?

You could potentially save up to 33% on your flight if you consider stops on a Idaho to Sydney flight.

Cheap Idaho to Sydney flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho to Sydney

Fastest flight time	19h 45m
Direct flights	None

The fastest flight from Idaho to Sydney takes 19h 45m

There are no direct flights from Idaho to Sydney. There are no popular flight routes from Idaho to Sydney.

Search flight deals

When did momondo last update prices for flights from Idaho to Sydney Kingsford Smith Airport?
Prices for flights from Idaho to Sydney Kingsford Smith Airport refresh daily.
How many operators does momondo search for flights from Idaho to Sydney Kingsford Smith Airport?
As of December 2025, there are 2 operators available to choose from for flights from Idaho to Sydney Kingsford Smith Airport.
How old do you have to be to fly from Idaho to Sydney Kingsford Smith Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Idaho to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Idaho to Sydney

Compare and see reviews for airlines that fly from Idaho to Sydney with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $898	Free Cancellation	Rating 7.4 9,092 reviews		Search United Airlines flights

Parramatta

Bondi Beach

Katoomba

Wollongong

Randwick

Coogee

Manly

Penrith

Cronulla

Lithgow

Leura

Charlestown

Terrigal

Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Idaho to Sydney?

Finding the right flight to Sydney from Idaho is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sydney quick and easy, saving you time and money.

Can I find flights from Idaho to Sydney with flexible booking policies on momondo?

momondo does allow users to show only those flights to Sydney from Idaho which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Idaho to Sydney?

momondo provides multiple filters to help you find the best flight to Sydney from Idaho. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Idaho to Sydney right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Idaho to Sydney now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sydney and let you know when they change.