$1,296+ Cheap flights from Boise (BOI) to Australia
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
May 10 — May 171
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Boise to Australia 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 Boise to Australia
Cheapest
Best
Last-minute
Cheapest flights from Boise to AustraliaExplore the most affordable flight options available from Boise to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 10, 2026.
Explore the most affordable flight options available from Boise to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 10, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 9/302:30 pm
BOI
- SYD
2 stops25h 00m
Alaska Airlines
Mon 10/56:50 pm
SYD
- BOI
2 stops22h 21m
Alaska Airlines
Deal found 4/9![Alaska Airlines logo]()
$1,296
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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.
Sat 11/76:51 pm
BOI
- SYD
1 stop20h 09m
Alaska Airlines
Sat 11/1411:15 am
SYD
- BOI
1 stop29h 40m
Alaska Airlines
Deal found 4/9![Alaska Airlines logo]()
$1,301
This Alaska Airlines deal was found by Cheapflights users on 4/5. 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.
Thu 6/258:03 am
BOI
- SYD
1 stop31h 02m
Alaska Airlines
Thu 7/99:10 am
SYD
- BOI
1 stop29h 35m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$1,309
This Justfly.com deal was found by Cheapflights users on 4/8. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:14 pm
BOI
- SYD
1 stop19h 51m
Qantas Airways
Tue 5/125:50 pm
SYD
- BOI
1 stop21h 11m
Qantas Airways
Deal found 4/8![Qantas Airways logo]()
$1,319
This American Airlines deal was found by Cheapflights users on 4/6. 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.
Tue 5/2611:19 am
BOI
- SYD
1 stop27h 36m
American Airlines
Sun 6/712:00 pm
SYD
- BOI
1 stop26h 29m
American Airlines
Deal found 4/6![American Airlines logo]()
$1,323
This United Airlines deal was found by Cheapflights users on 4/5. 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 5/267:05 pm
BOI
- SYD
1 stop19h 50m
United Airlines
Sun 6/710:20 am
SYD
- BOI
1 stop18h 48m
United Airlines
Deal found 4/5![United Airlines logo]()
$1,326
This United Airlines deal was found by Cheapflights users on 4/5. 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.
Thu 5/212:05 pm
BOI
- SYD
1 stop24h 50m
United Airlines
Sun 6/710:20 am
SYD
- BOI
1 stop18h 48m
United Airlines
Deal found 4/5![United Airlines logo]()
$1,376
This Alaska Airlines deal was found by Cheapflights users on 4/6. 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.
Sun 11/16:51 pm
BOI
- SYD
1 stop20h 09m
Alaska Airlines
Thu 11/511:15 am
SYD
- BOI
1 stop20h 29m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$1,382
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Thu 5/712:30 pm
BOI
- ADL
2 stops31h 05m
United Airlines
Mon 5/117:15 am
ADL
- BOI
2 stops29h 32m
United Airlines
Deal found 4/9![United Airlines logo]()
$1,705
This Singapore Airlines deal was found by Cheapflights users on 4/6. 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.
Thu 5/78:02 am
BOI
- ADL
3 stops40h 48m
Singapore Airlines
Mon 5/115:35 pm
ADL
- BOI
3 stops44h 11m
Singapore Airlines
Deal found 4/6![Singapore Airlines logo]()
$7,313
Best flights from Boise to AustraliaDiscover carefully curated flight deals from Boise to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 10, 2026.
Discover carefully curated flight deals from Boise to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 10, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 9/301:29 pm
BOI
- SYD
2 stops26h 01m
Alaska Airlines
Mon 10/56:50 pm
SYD
- BOI
1 stop21h 05m
Alaska Airlines
Deal found 4/9![Alaska Airlines logo]()
$1,296
This American Airlines deal was found by Cheapflights users on 4/6. 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.
Tue 5/2611:19 am
BOI
- SYD
1 stop27h 36m
American Airlines
Sun 6/712:00 pm
SYD
- BOI
1 stop26h 29m
American Airlines
Deal found 4/6![American Airlines logo]()
$1,323
This United Airlines deal was found by Cheapflights users on 4/5. 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 5/262:40 pm
BOI
- SYD
2 stops24h 20m
United Airlines
Sun 6/79:30 am
SYD
- BOI
2 stops28h 05m
United Airlines
Deal found 4/5![United Airlines logo]()
$1,330
This Alaska Airlines deal was found by Cheapflights users on 4/5. 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.
Thu 6/258:03 am
BOI
- SYD
1 stop31h 02m
Alaska Airlines
Thu 7/99:10 am
SYD
- BOI
1 stop29h 35m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$1,309
This United Airlines deal was found by Cheapflights users on 4/8. 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.
Mon 6/222:05 pm
BOI
- SYD
1 stop24h 50m
United Airlines
Tue 6/3010:20 am
SYD
- BOI
1 stop18h 48m
United Airlines
Deal found 4/8![United Airlines logo]()
$1,406
This Alaska Airlines deal was found by Cheapflights users on 4/5. 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.
Fri 9/257:05 am
BOI
- SYD
1 stop32h 00m
Alaska Airlines
Mon 9/289:10 am
SYD
- BOI
1 stop19h 23m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$1,391
This United Airlines deal was found by Cheapflights users on 4/7. 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 6/167:05 pm
BOI
- SYD
1 stop19h 50m
United Airlines
Tue 6/3010:20 am
SYD
- BOI
1 stop25h 05m
United Airlines
Deal found 4/7![United Airlines logo]()
$1,406
This Alaska Airlines deal was found by Cheapflights users on 4/7. 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.
Thu 7/308:03 am
BOI
- SYD
1 stop31h 02m
Alaska Airlines
Mon 8/319:10 am
SYD
- BOI
1 stop19h 23m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$1,410
This United Airlines deal was found by Cheapflights users on 4/8. 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.
Mon 6/222:40 pm
BOI
- SYD
2 stops24h 20m
United Airlines
Thu 7/29:30 am
SYD
- BOI
2 stops24h 26m
United Airlines
Deal found 4/8![United Airlines logo]()
$1,411
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Thu 5/712:30 pm
BOI
- ADL
2 stops31h 05m
United Airlines
Mon 5/117:15 am
ADL
- BOI
2 stops29h 32m
United Airlines
Deal found 4/9![United Airlines logo]()
$1,705
This Singapore Airlines deal was found by Cheapflights users on 4/5. 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.
Thu 5/78:02 am
BOI
- ADL
3 stops55h 53m
Singapore Airlines
Mon 5/115:35 pm
ADL
- BOI
3 stops44h 11m
Singapore Airlines
Deal found 4/5![Singapore Airlines logo]()
$7,313
Last-minute flights from Boise to AustraliaDiscover last-minute flight deals from Boise to Australia. Data last updated April 10, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Australia. Data last updated April 10, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 4/8. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:14 pm
BOI
- SYD
1 stop19h 51m
Qantas Airways
Tue 5/125:50 pm
SYD
- BOI
1 stop21h 11m
Qantas Airways
Deal found 4/8![Qantas Airways logo]()
$1,319
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Thu 5/712:30 pm
BOI
- ADL
2 stops31h 05m
United Airlines
Mon 5/117:15 am
ADL
- BOI
2 stops29h 32m
United Airlines
Deal found 4/9![United Airlines logo]()
$1,705
This Singapore Airlines deal was found by Cheapflights users on 4/6. 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.
Thu 5/78:02 am
BOI
- ADL
3 stops40h 48m
Singapore Airlines
Mon 5/115:35 pm
ADL
- BOI
3 stops44h 11m
Singapore Airlines
Deal found 4/6![Singapore Airlines logo]()
$7,313
This United Airlines deal was found by Cheapflights users on 4/5. 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.
Thu 5/212:05 pm
BOI
- SYD
1 stop24h 50m
United Airlines
Sun 6/710:20 am
SYD
- BOI
1 stop18h 48m
United Airlines
Deal found 4/5![United Airlines logo]()
$1,376
This United Airlines deal was found by Cheapflights users on 4/6. 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.
Thu 5/212:05 pm
BOI
- SYD
1 stop24h 50m
United Airlines
Thu 5/2810:20 am
SYD
- BOI
1 stop18h 48m
United Airlines
Deal found 4/6![United Airlines logo]()
$1,426
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 5/226:54 pm
BOI
- SYD
2 stops24h 56m
Multiple Airlines
Fri 5/295:50 pm
SYD
- BOI
1 stop32h 30m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$1,419
This American Airlines deal was found by Cheapflights users on 4/8. 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 5/2312:12 pm
BOI
- SYD
1 stop26h 43m
American Airlines
Sat 5/3012:00 pm
SYD
- BOI
1 stop26h 29m
American Airlines
Deal found 4/8![American Airlines logo]()
$1,423
This American Airlines deal was found by Cheapflights users on 4/6. 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.
Tue 5/2611:19 am
BOI
- SYD
1 stop27h 36m
American Airlines
Sun 6/712:00 pm
SYD
- BOI
1 stop26h 29m
American Airlines
Deal found 4/6![American Airlines logo]()
$1,323
This United Airlines deal was found by Cheapflights users on 4/5. 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 5/267:05 pm
BOI
- SYD
1 stop19h 50m
United Airlines
Sun 6/710:20 am
SYD
- BOI
1 stop18h 48m
United Airlines
Deal found 4/5![United Airlines logo]()
$1,326
Find flight deals from Boise to Australia
Keep the following information in mind while searching for Boise to Australia flight deals. Data was last updated April 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,296 (Alaska Airlines) |
Popular in | December |
Cheapest in | March |
Average price | $1,270 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boise to Australia 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 10, 2026.
Use the filters below to find and compare flights from Boise to Australia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Wed 9/30
1:29 pm-7:30 am
2 stops26h 01m
Sydney Kingsford Smith
Mon 10/5
6:50 pm-10:55 pm
1 stop21h 05m
$1,296
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Thu 6/25
8:03 am-7:05 am
1 stop31h 02m
Sydney Kingsford Smith
Thu 7/9
9:10 am-10:45 pm
1 stop29h 35m
$1,309
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Tue 5/26
11:19 am-6:55 am
1 stop27h 36m
Sydney Kingsford Smith
Sun 6/7
12:00 pm-10:29 pm
1 stop26h 29m
$1,323
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Tue 5/26
2:40 pm-7:00 am
2 stops24h 20m
Sydney Kingsford Smith
Sun 6/7
9:30 am-9:35 pm
2 stops28h 05m
$1,330
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Fri 9/25
7:05 am-7:05 am
1 stop32h 00m
Sydney Kingsford Smith
Mon 9/28
9:10 am-12:33 pm
1 stop19h 23m
$1,391
Quickest round-trip
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Mon 6/22
2:05 pm-6:55 am
1 stop24h 50m
Sydney Kingsford Smith
Tue 6/30
10:20 am-1:08 pm
1 stop18h 48m
$1,406
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Tue 6/16
7:05 pm-6:55 am
1 stop19h 50m
Sydney Kingsford Smith
Tue 6/30
10:20 am-7:25 pm
1 stop25h 05m
$1,406
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Thu 7/30
8:03 am-7:05 am
1 stop31h 02m
Sydney Kingsford Smith
Mon 8/31
9:10 am-12:33 pm
1 stop19h 23m
$1,410
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Mon 6/22
2:40 pm-7:00 am
2 stops24h 20m
Sydney Kingsford Smith
Thu 7/2
9:30 am-5:56 pm
2 stops24h 26m
$1,411
BoiseAdelaide
BOI - ADL
BOIADL
Boise Air Term. Gowen Fld
Thu 5/7
12:30 pm-11:05 am
2 stops31h 05m
Adelaide
Mon 5/11
7:15 am-9:17 pm
2 stops29h 32m
$1,705
Showing 1-10 of 11 resultsSorted by cheapest first
Best time to book a flight from Boise to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from Boise with our price prediction graph.
BOI-SYD
BOI-ADL
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 Boise to Australia
BOI-AU0
BOI-SYD
BOI-ADL
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Australia
Get insights into the airlines that provide service to Australia. 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 Australia. Reviews last updated April 10, 2026.
Peruse reviews from past customers who have flown with United Airlines and American Airlines from Boise to Australia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.7
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Related info for your journey
Find useful and relevant information for your journey from Boise to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top regions
Alternative routes for Boise to Australia
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Australia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boise to Australia by cabin class
Find flights from Boise to Australia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boise and Australia flights
Browse other Boise and Australia flight options. Last updated on April 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Fly to Australia regions
Consider these flights traveling to Australia regions.
Top 2 airlines flying from Boise to Australia
Discover the top 2 airlines that operate flights from Boise to Australia. 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 April 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$966 | Average$1,382 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$967 | Average$1,229 | FlexibilityNo cancel fee | On-time71% |