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 September 2025, there are 3 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.

$474 Cheap Flights from Idaho to Sydney in 2025/26

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Find the cheapest flights from Idaho to Sydney

Round-trip

One-way

Last minute

Cheap round-trip flights

12:45 pm - 9:15 amGEG-SYD

25h 30m1 stop

12:10 pm - 10:42 amSYD-GEG

17h 32m1 stop

$878United Airlines

Find Deal

jue., nov. 13 - jue., nov. 20

5:10 am - 9:05 amGEG-SYD

32h 55m2 stops

12:10 pm - 8:45 pmSYD-GEG

27h 35m2 stops

$882United Airlines

Find Deal

jue., nov. 13 - jue., nov. 20

7:00 am - 9:15 amGEG-SYD

32h 15m1 stop

12:10 pm - 9:24 pmSYD-GEG

27h 14m1 stop

$884United Airlines

Find Deal

vie., mar. 13 - vie., mar. 20

3:03 pm - 7:45 pmGEG-SYD

33h 42m2 stops

9:40 pm - 9:23 amSYD-GEG

30h 43m2 stops

$1,030Alaska Airlines

Find Deal

mié., dic. 10 - vie., dic. 26

1:52 pm - 8:50 pmGEG-SYD

36h 58m3 stops

9:40 pm - 1:58 pmSYD-GEG

34h 18m2 stops

$1,067Multiple Airlines

Find Deal

mar., oct. 21 - jue., oct. 30

6:10 am - 6:50 amGEG-SYD

29h 40m2 stops

9:40 am - 9:03 pmSYD-GEG

29h 23m2 stops

$1,143Delta

Find Deal

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

7:28 pm - 7:45 pmGEG-SYD

29h 17m2 stops

9:40 pm - 8:28 amSYD-GEG

29h 48m2 stops

$1,165Alaska Airlines

Find Deal

lun., ene. 12 - lun., ene. 26

2:11 pm - 10:30 amBOI-SYD

26h 19m2 stops

7:45 am - 11:02 pmSYD-BOI

33h 17m2 stops

$1,190Multiple Airlines

Find Deal

mar., nov. 11 - mar., nov. 18

6:30 am - 6:50 amGEG-SYD

29h 20m1 stop

1:15 pm - 9:30 pmSYD-GEG

26h 15m1 stop

$1,272Delta

Find Deal

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

1:50 pm - 9:05 amBOI-SYD

25h 15m1 stop

7:45 am - 1:35 pmSYD-BOI

47h 50m2 stops

$1,346Air New Zealand

Find Deal

mar., dic. 2 - mar., dic. 16

Alaska Airlines flights from Idaho to Sydney

Our best Alaska Airlines deals on Idaho to Sydney flight tickets

Alaska Airlines

Dec 10

GEG3:03 pmSpokane

33h 42m

2 stops

SYD7:45 pmSydney Kingsford Smith

Dec 26

SYD9:40 pmSydney Kingsford Smith

30h 43m

2 stops

GEG9:23 amSpokane

$1,030

Find similar

Alaska Airlines

Jan 12

GEG7:28 pmSpokane

29h 17m

2 stops

SYD7:45 pmSydney Kingsford Smith

Jan 26

SYD9:40 pmSydney Kingsford Smith

29h 48m

2 stops

GEG8:28 amSpokane

$1,165

Find similar

Alaska Airlines

Jan 4

GEG4:49 pmSpokane

55h 56m

2 stops

SYD7:45 pmSydney Kingsford Smith

Jan 13

SYD9:40 pmSydney Kingsford Smith

21h 43m

2 stops

GEG12:23 amSpokane

$1,188

Find similar

United Airlines flights from Idaho to Sydney

Our best United Airlines deals on Idaho to Sydney flight tickets

United Airlines

Nov 13

GEG12:45 pmSpokane

25h 30m

1 stop

SYD9:15 amSydney Kingsford Smith

Nov 20

SYD12:10 pmSydney Kingsford Smith

17h 32m

1 stop

GEG10:42 amSpokane

$878

Find similar

United Airlines

Nov 13

GEG5:10 amSpokane

32h 55m

2 stops

SYD9:05 amSydney Kingsford Smith

Nov 20

SYD12:10 pmSydney Kingsford Smith

27h 35m

2 stops

GEG8:45 pmSpokane

$882

Find similar

United Airlines

Mar 13

GEG7:00 amSpokane

32h 15m

1 stop

SYD9:15 amSydney Kingsford Smith

Mar 20

SYD12:10 pmSydney Kingsford Smith

27h 14m

1 stop

GEG9:24 pmSpokane

$884

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

jue. 11/13

12:45 pm-9:15 am

1 stop25h 30m

Sydney Kingsford Smith

jue. 11/20

12:10 pm-10:42 am

1 stop17h 32m

$878

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

jue. 11/13

5:10 am-9:05 am

2 stops32h 55m

Sydney Kingsford Smith

jue. 11/20

12:10 pm-8:45 pm

2 stops27h 35m

$882

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

vie. 3/13

7:00 am-9:15 am

1 stop32h 15m

Sydney Kingsford Smith

vie. 3/20

12:10 pm-9:24 pm

1 stop27h 14m

$884

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mié. 12/10

3:03 pm-7:45 pm

2 stops33h 42m

Sydney Kingsford Smith

vie. 12/26

9:40 pm-9:23 am

2 stops30h 43m

$1,030

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mar. 10/21

1:52 pm-8:50 pm

3 stops36h 58m

Sydney Kingsford Smith

jue. 10/30

9:40 pm-1:58 pm

2 stops34h 18m

$1,067

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mar. 3/3

6:10 am-6:50 am

2 stops29h 40m

Sydney Kingsford Smith

mar. 3/10

9:40 am-9:03 pm

2 stops29h 23m

$1,143

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

lun. 1/12

7:28 pm-7:45 pm

2 stops29h 17m

Sydney Kingsford Smith

lun. 1/26

9:40 pm-8:28 am

2 stops29h 48m

$1,165

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 11/11

2:11 pm-10:30 am

2 stops26h 19m

Sydney Kingsford Smith

mar. 11/18

7:45 am-11:02 pm

2 stops33h 17m

$1,190

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-9:30 pm

1 stop26h 15m

$1,272

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 12/2

1:50 pm-9:05 am

1 stop25h 15m

Sydney Kingsford Smith

mar. 12/16

7:45 am-1:35 pm

2 stops47h 50m

$1,346

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 $967. 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 $1,010.

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.

Cheap Idaho to Sydney flight deals and tips

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

Direct flights	None

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 September 2025, there are 3 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 $926	Free Cancellation	Rating 7.4 8,924 reviews		Search United Airlines flights
American Airlines	PriceFrom $987	Free Cancellation	Rating 7.2 10,000 reviews		Search American Airlines flights

Parramatta

Bondi Beach

Katoomba

Wollongong

Randwick

Cronulla

Coogee

Lithgow

Penrith

Manly

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.