What is the cheapest airline that flies from Idaho to Australia?

Alaska Airlines and United Airlines are the most popular carriers operating from Idaho to Australia

When did momondo last update prices for flights from Idaho to Australia?

Prices for flights from Idaho to Australia are updated daily.

How many operators does momondo search for flights from Idaho to Australia?

The number of operators available for flights from Idaho to Australia is 3 as of August 2025.

How old do you have to be to fly from Idaho to Australia?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to Australia.

What documentation or ID do you need to fly to Australia?

The travel and health documents you'll need for your trip to Australia may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Australia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$548 Cheap Flights from Idaho to Australia in 2025

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Find the cheapest flights from Idaho to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

1:38 pm - 7:00 amGEG-SYD

24h 22m2 stops

9:30 am - 9:03 pmSYD-GEG

28h 33m2 stops

$881United Airlines

Find Deal

Sat, Aug 30 - Sat, Sep 6

4:05 pm - 7:00 amGEG-SYD

67h 55m2 stops

12:10 pm - 10:42 amSYD-GEG

17h 32m1 stop

$913United Airlines

Find Deal

Tue, Nov 4 - Mon, Nov 17

1:57 pm - 7:05 amBOI-SYD

25h 08m2 stops

9:10 am - 8:02 pmSYD-BOI

26h 52m2 stops

$956American Airlines

Find Deal

Fri, Sep 5 - Fri, Sep 12

2:06 pm - 7:25 amBOI-SYD

23h 19m2 stops

11:15 am - 4:51 pmSYD-BOI

23h 36m2 stops

$1,016American Airlines

Find Deal

Wed, Nov 19 - Wed, Feb 18

2:32 pm - 6:35 amGEG-SYD

23h 03m1 stop

9:25 am - 1:48 pmSYD-GEG

21h 23m1 stop

$1,040Delta

Find Deal

Sat, Aug 30 - Sat, Sep 6

3:25 pm - 6:35 amGEG-SYD

22h 10m2 stops

9:25 am - 1:48 pmSYD-GEG

21h 23m1 stop

$1,044Delta

Find Deal

Fri, Aug 22 - Fri, Aug 29

3:30 pm - 7:05 amGEG-SYD

22h 35m2 stops

9:10 am - 2:46 pmSYD-GEG

22h 36m2 stops

$1,064Alaska Airlines

Find Deal

Sat, Sep 20 - Sat, Sep 27

1:25 pm - 11:35 amGEG-BNE

29h 10m2 stops

2:15 pm - 10:25 pmBNE-GEG

25h 10m2 stops

$1,076Qantas Airways

Find Deal

Fri, Sep 19 - Fri, Sep 26

8:27 pm - 7:05 amBOI-SYD

18h 38m1 stop

9:10 am - 1:39 pmSYD-BOI

20h 29m1 stop

$1,152Alaska Airlines

Find Deal

Sat, Sep 20 - Sat, Sep 27

12:29 pm - 6:55 amGEG-SYD

25h 26m1 stop

12:10 pm - 10:32 pmSYD-GEG

27h 22m1 stop

$1,255Qantas Airways

Find Deal

Fri, Aug 22 - Fri, Aug 29

American Airlines flights from Idaho to Australia

Our best American Airlines deals on Idaho to Australia flight tickets

American Airlines

Sep 5

BOI1:57 pmBoise Air Term. Gowen Fld

25h 08m

2 stops

SYD7:05 amSydney Kingsford Smith

Sep 12

SYD9:10 amSydney Kingsford Smith

26h 52m

2 stops

BOI8:02 pmBoise Air Term. Gowen Fld

$956

Find similar

American Airlines

Nov 19

BOI2:06 pmBoise Air Term. Gowen Fld

23h 19m

2 stops

SYD7:25 amSydney Kingsford Smith

Feb 18

SYD11:15 amSydney Kingsford Smith

23h 36m

2 stops

BOI4:51 pmBoise Air Term. Gowen Fld

$1,016

Find similar

American Airlines

Nov 16

BOI2:06 pmBoise Air Term. Gowen Fld

24h 54m

2 stops

SYD9:00 amSydney Kingsford Smith

Feb 15

SYD7:20 amSydney Kingsford Smith

23h 02m

2 stops

BOI12:22 pmBoise Air Term. Gowen Fld

$1,040

Find similar

Delta flights from Idaho to Australia

Our best Delta deals on Idaho to Australia flight tickets

Delta

Aug 30

GEG2:32 pmSpokane

23h 03m

1 stop

SYD6:35 amSydney Kingsford Smith

Sep 6

SYD9:25 amSydney Kingsford Smith

21h 23m

1 stop

GEG1:48 pmSpokane

$1,040

Find similar

Delta

Aug 22

GEG3:25 pmSpokane

22h 10m

2 stops

SYD6:35 amSydney Kingsford Smith

Aug 29

SYD9:25 amSydney Kingsford Smith

21h 23m

1 stop

GEG1:48 pmSpokane

$1,044

Find similar

Delta

Aug 30

GEG2:32 pmSpokane

23h 03m

1 stop

SYD6:35 amSydney Kingsford Smith

Sep 6

SYD9:25 amSydney Kingsford Smith

30h 43m

2 stops

GEG11:08 pmSpokane

$1,045

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 8/30

1:38 pm-7:00 am

2 stops24h 22m

Sydney Kingsford Smith

Sat 9/6

9:30 am-9:03 pm

2 stops28h 33m

$881

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 11/4

4:05 pm-7:00 am

2 stops67h 55m

Sydney Kingsford Smith

Mon 11/17

12:10 pm-10:42 am

1 stop17h 32m

$913

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Fri 9/5

1:57 pm-7:05 am

2 stops25h 08m

Sydney Kingsford Smith

Fri 9/12

9:10 am-8:02 pm

2 stops26h 52m

$956

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 11/19

2:06 pm-7:25 am

2 stops23h 19m

Sydney Kingsford Smith

Wed 2/18

11:15 am-4:51 pm

2 stops23h 36m

$1,016

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 8/30

2:32 pm-6:35 am

1 stop23h 03m

Sydney Kingsford Smith

Sat 9/6

9:25 am-1:48 pm

1 stop21h 23m

$1,040

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 8/22

3:25 pm-6:35 am

2 stops22h 10m

Sydney Kingsford Smith

Fri 8/29

9:25 am-1:48 pm

1 stop21h 23m

$1,044

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 9/20

3:30 pm-7:05 am

2 stops22h 35m

Sydney Kingsford Smith

Sat 9/27

9:10 am-2:46 pm

2 stops22h 36m

$1,064

SpokaneBrisbane

GEG - BNE

GEGBNE

Spokane

Fri 9/19

1:25 pm-11:35 am

2 stops29h 10m

Brisbane

Fri 9/26

2:15 pm-10:25 pm

2 stops25h 10m

$1,076

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sat 9/20

8:27 pm-7:05 am

1 stop18h 38m

Sydney Kingsford Smith

Sat 9/27

9:10 am-1:39 pm

1 stop20h 29m

$1,152

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Fri 8/22

12:29 pm-6:55 am

1 stop25h 26m

Sydney Kingsford Smith

Fri 8/29

12:10 pm-10:32 pm

1 stop27h 22m

$1,255

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 Australia

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 Australia?

The month of May is, on average, the cheapest month to fly to Australia from Idaho, with most prices found around $1,031. If you aren’t able to travel during the month of May, then book flights to Australia from Idaho during April instead. Flights to Australia in April, while not as cheap as those in May, still average around $1,164.

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

The cheapest day to depart from Idaho to Australia is on a Sunday. Travelers who choose to depart for Australia on a Sunday will often find tickets for as low as $1,164. On the other hand, Tuesday is the most expensive day to depart from Idaho because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,529.

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

Flying to Australia from Idaho in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,311 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $1,539 on average. Flights to Australia from Idaho in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

Cheap Idaho to Australia flight deals and tips

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

Best Price Found	$548
Fastest flight time	18h 38m
Direct flights	None
Airports in Australia	2 airports

The best one-way flight to Australia from Idaho in the past 72 hours is $548. The best round-trip flight deal from Idaho to Australia found on momondo in the last 72 hours is $881.

The fastest flight from Idaho to Australia takes 18h 38m

There are no direct flights from Idaho to Australia. Popular non-direct routes for this connection are Spokane Airport - Sydney Kingsford Smith Airport, Boise Air Term. Gowen Fld Airport - Sydney Kingsford Smith Airport and Spokane Airport - Brisbane Airport.

There are 2 airports near Australia: Brisbane (BNE), Sydney Kingsford Smith (SYD)

Search flight deals

When did momondo last update prices for flights from Idaho to Australia?
Prices for flights from Idaho to Australia are updated daily.
How many operators does momondo search for flights from Idaho to Australia?
The number of operators available for flights from Idaho to Australia is 3 as of August 2025.
How old do you have to be to fly from Idaho to Australia?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to Australia.
What documentation or ID do you need to fly to Australia?
The travel and health documents you'll need for your trip to Australia may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Australia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Idaho to Australia

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $926	Free Cancellation	Rating 7.4 8,917 reviews		Search United Airlines flights
American Airlines	PriceFrom $987	Free Cancellation	Rating 7.2 10,000 reviews		Search American Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Idaho to Australia. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Idaho to Australia flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Australia from Idaho.

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

Of course. momondo tracks the price of Idaho to Australia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.