HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$510+ Cheap flights from Sydney (SYD) to Idaho

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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — BOI
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Sydney to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Sydney to Idaho

Keep the following information in mind while searching for Sydney to Idaho flight deals. Data was last updated April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,507
(United Airlines)

One-way from

$510
(Trip.com)

Popular in

December

Cheapest in

July

Average price

$1,297
Provider with most accurate pricing for Sydney Kingsford Smith-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Boise Air Term. Gowen Fld flights.
Search Deals
From Sydney Kingsford Smith to Idaho
Search Deals
One-way flight from Sydney Kingsford Smith to Idaho
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($249 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Sydney to Idaho

Cheapest flights from Sydney to Idaho
Explore the most affordable flight options available from Sydney to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This United Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/19:30 amSYD - BOI
2 stops27h 56mUnited Airlines
Sun 6/812:39 pmBOI - SYD
2 stops26h 21mUnited Airlines
Deal found 4/17$1,507
This Aunt Betty deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/19:20 amSYD - BOI
2 stops23h 21mAir Canada
Sun 6/87:07 pmBOI - SYD
3 stops44h 13mAir Canada
Deal found 4/17$2,318
This Singapore Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/13:00 pmSYD - BOI
3 stops47h 52mMultiple Airlines
Sun 6/88:05 amBOI - SYD
3 stops40h 40mMultiple Airlines
Deal found 4/17$2,665

Cheapflights Fare Finder

Customize your flight search to find flights from Sydney to Idaho 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 2,558,603 searches. Data last updated April 17, 2025.
Use the filters below to find and compare flights from Sydney to Idaho that are best for you.

Fly from

Sydney

Fly to

Idaho

Route

Depart

Return

Price

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Sun 6/1

10:20 am-1:49 pm

1 stop19h 29m

Boise Air Term. Gowen Fld

Sun 6/8

7:50 am-6:55 am

1 stop31h 05m

$1,507

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Sun 6/1

9:20 am-4:41 pm

2 stops23h 21m

Boise Air Term. Gowen Fld

Sun 6/8

7:07 pm-7:20 am

3 stops44h 13m

$2,318

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Sun 6/1

3:00 pm-10:52 pm

3 stops47h 52m

Boise Air Term. Gowen Fld

Sun 6/8

8:05 am-4:45 pm

3 stops40h 40m

$2,665

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Fri 8/22

6:00 am-7:50 pm

2 stops29h 50m

$510

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Thu 8/21

10:20 am-11:44 pm

1 stop29h 24m

$802

SydneyBoise

SYD - BOI

SYDBOI

Sydney Kingsford Smith

Thu 8/21

9:25 am-11:16 pm

1 stop29h 51m

$807

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Best time to book a flight from Sydney to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Sydney with our price prediction graph.
Estimated round-trip 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 Sydney to Idaho

What is the cheapest month to book a flight from Sydney to Idaho?

Currently, October is the cheapest month in which you can book a flight from Sydney to Idaho (average of $314). Flying from Sydney to Idaho in June is currently the most expensive (average of $419). 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.

Rainfall in Idaho by month

Plan your trip to Idaho by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

Plan your trip to Idaho by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Idaho, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated April 17, 2025.
Delta
8.0
Very good
7,917 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,917 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.0
Good
9,142 reviews
Delta
8.0
Very good
7,917 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Sydney to Idaho. 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 from for flights from Sydney to Idaho?

    Located just 4.6 mi from the city center, Sydney Kingsford Smith (SYD) is the airport most travelers will use when flying to Idaho from Sydney.

  • Can I find deals for flights from Sydney to Idaho that include hotel bookings?

    Yes. In addition to deals on Sydney to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sydney to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sydney to Idaho.

  • Can I find deals for business class flights from Sydney to Idaho?

    Yes. Cheapflights offers flight deals from Sydney to Idaho 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 Sydney to Idaho?

    Currently, October is the cheapest month in which you can book a flight from Sydney to Idaho (average of $314). Flying from Sydney to Idaho in June is currently the most expensive (average of $419). 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

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 Sydney to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Sydney to Los Angeles flights
Sydney to San Francisco flights
Sydney to John F Kennedy Intl flights
Sydney to Dallas/Fort Worth flights
Sydney to Ontario flights
Sydney to LaGuardia flights
Sydney to Newark flights
Sydney to Honolulu flights
Sydney to Santa Ana flights
Sydney to Atlanta flights
Sydney to San Jose flights
Sydney to Boston flights
Sydney to Hobby flights
Sydney to Seattle flights
Sydney to Oakland flights
Sydney to Orlando flights
Sydney to O'Hare Intl flights
Sydney to Las Vegas flights
Sydney to Baltimore flights
Sydney to George Bush Intcntl flights
Sydney to Miami flights
Sydney to Dulles Intl flights
Sydney to Midway flights
Sydney to Nashville flights
Sydney to Sky Harbor Intl flights
Sydney to Reagan-National flights
Sydney to Kansas City flights
Sydney to Denver flights
Sydney to Long Beach flights
Coolangatta to Los Angeles flights
Sydney to San Diego flights
Sydney to Philadelphia flights
Sydney to St. Louis flights
Sydney to Kahului flights
Sydney to Detroit flights
Sydney to Salt Lake City flights
Coolangatta to Dulles Intl flights
Sydney to Portland flights
Sydney to Fort Lauderdale flights
Sydney to Tampa flights
Sydney to Kailua-Kona flights
Sydney to Melbourne flights
Sydney to Jacksonville flights
Sydney to Minneapolis flights
Sydney to Lihue flights
Sydney to New Orleans flights
Sydney to Austin flights

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.