$571+ Cheap flights from Idaho to Sydney (SYD)
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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Aug 3 — Aug 101
1 adult, Economy
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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
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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 Idaho to Sydney
Keep the following information in mind while searching for Idaho to Sydney flight deals. Data was last updated July 29, 2025.
Round-trip from | $909 (Gurufare) |
|---|---|
One-way from | $571 (Kiwi.com) |
Popular in | December |
Cheapest in | May |
Average price | $1,456 |
Find flight deals from Idaho to Sydney
Cheapest flights from Idaho to SydneyExplore 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 July 29, 2025.
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 July 29, 2025.
This Gurufare deal was found by Cheapflights users on 7/26. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/316:49 pmGEG - SYD
1 stop19h 16mQantas Airways
Sat 8/169:10 amSYD - GEG
1 stop25h 37mQantas Airways
Deal found 7/26![Qantas Airways logo]()
$888
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Tue 11/44:05 pmGEG - SYD
2 stops67h 55mUnited Airlines
Mon 11/1712:10 pmSYD - GEG
1 stop17h 32mUnited Airlines
Deal found 7/28![United Airlines logo]()
$916
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/271:38 pmBOI - SYD
2 stops25h 27mAmerican Airlines
Sun 10/1910:10 amSYD - BOI
2 stops23h 40mAmerican Airlines
Deal found 7/27![American Airlines logo]()
$988
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/311:10 pmGEG - SYD
2 stops24h 25mDelta
Sat 8/169:25 amSYD - GEG
2 stops30h 43mDelta
Deal found 7/28![Delta logo]()
$1,047
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/228:02 amBOI - SYD
2 stops55h 03mAlaska Airlines
Thu 11/611:15 amSYD - BOI
2 stops30h 14mAlaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$1,172
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 9/272:12 pmBOI - SYD
1 stop24h 48mUnited Airlines
Sun 10/1911:20 amSYD - BOI
1 stop19h 23mUnited Airlines
Deal found 7/27![United Airlines logo]()
$1,182
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/276:25 amGEG - SYD
1 stop32h 05mMultiple Airlines
Wed 9/34:20 pmSYD - GEG
2 stops23h 32mMultiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$1,254
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/295:45 pmBOI - SYD
2 stops45h 45mMultiple Airlines
Fri 9/55:45 pmSYD - BOI
1 stop21h 09mMultiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$1,264
This FlightHub deal was found by Cheapflights users on 7/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/277:10 amGEG - SYD
2 stops32h 50mChina Eastern
Wed 9/38:30 pmSYD - GEG
2 stops41h 56mChina Eastern
Deal found 7/28![China Eastern logo]()
$1,312
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/43:43 pmBOI - SYD
1 stop22h 52mDelta
Tue 8/129:25 amSYD - BOI
1 stop21h 38mDelta
Deal found 7/29![Delta logo]()
$1,376
This Ovago deal was found by Cheapflights users on 7/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:15 amBOI - SYD
3 stops40h 25mAir Tahiti Nui
Sun 2/158:55 amSYD - BOI
2 stops32h 04mAir Tahiti Nui
Deal found 7/29![Air Tahiti Nui logo]()
$2,206
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/45:00 amBOI - SYD
3 stops34h 20mAir Canada
Tue 8/129:20 amSYD - BOI
2 stops28h 14mAir Canada
Deal found 7/29![Air Canada logo]()
$2,299
Cheapflights Fare Finder
Customize 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 2,558,603 searches. Data last updated July 29, 2025.
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 11/4
2:38 pm-9:00 am
1 stop23h 22m
Sydney Kingsford Smith
Mon 11/17
5:45 pm-1:58 pm
1 stop39h 13m
$909
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
$916
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Sat 9/27
1:38 pm-7:05 am
2 stops25h 27m
Sydney Kingsford Smith
Sun 10/19
10:10 am-4:50 pm
2 stops23h 40m
$988
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Wed 10/22
8:02 am-8:05 am
2 stops55h 03m
Sydney Kingsford Smith
Thu 11/6
11:15 am-11:29 pm
2 stops30h 14m
$1,172
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Sat 9/27
2:12 pm-7:00 am
1 stop24h 48m
Sydney Kingsford Smith
Sun 10/19
11:20 am-1:43 pm
1 stop19h 23m
$1,182
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Wed 8/27
6:25 am-7:30 am
1 stop32h 05m
Sydney Kingsford Smith
Wed 9/3
4:20 pm-10:52 pm
2 stops23h 32m
$1,254
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Fri 8/29
5:45 pm-7:30 am
2 stops45h 45m
Sydney Kingsford Smith
Fri 9/5
5:45 pm-10:54 pm
1 stop21h 09m
$1,264
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Wed 8/27
7:10 am-9:00 am
2 stops32h 50m
Sydney Kingsford Smith
Wed 9/3
8:30 pm-9:26 pm
2 stops41h 56m
$1,312
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Mon 8/4
3:43 pm-6:35 am
1 stop22h 52m
Sydney Kingsford Smith
Tue 8/12
9:25 am-3:03 pm
1 stop21h 38m
$1,376
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Mon 8/4
5:00 am-7:20 am
3 stops34h 20m
Sydney Kingsford Smith
Tue 8/12
9:20 am-9:34 pm
2 stops28h 14m
$2,299
Showing 1-10 of 19 results
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 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 Idaho to Sydney
What is the cheapest month to book a flight from Idaho to Sydney?
Currently, February is the cheapest month in which you can book a flight from Idaho to Sydney (average of $1,028). Flying from Idaho to Sydney in December is currently the most expensive (average of $1,619). 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.
What is the cheapest time of day to fly from ID to SYD?
Find hourly flight availability from Idaho to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Sydney as you normally would.
Reviews of airlines servicing Sydney
Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated July 29, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Air New Zealand from Idaho to Sydney to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Food
7.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Food
7.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Food
7.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Food
7.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Food
7.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Food
7.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
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.
Traveling to a place near Sydney?
Book flights to Sydney if you plan to visit one of these locationsWollongong
Parramatta
Manly
Coogee
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Idaho to Sydney
See prices for flight routes from nearby airports that may be better suited for you.
Top 2 airlines flying from Idaho to Sydney
Discover the top 2 airlines that operate flights from Idaho to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$926 | Average$1,338 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$987 | Average$1,296 | FlexibilityNo cancel fee | On-time71% |