$644+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Jun 4 — Jun 111
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Idaho to Sydney 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 Idaho to Sydney
Cheapest
Best
Last-minute
One-way
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 May 5, 2026.
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 May 5, 2026.
This oojo deal was found by Cheapflights users on 5/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:51 pm
BOI
- SYD
1 stop20h 14m
Qantas Airways
Fri 10/307:05 am
SYD
- BOI
2 stops23h 57m
Qantas Airways
Deal found 5/1![Qantas Airways logo]()
$1,109
This Alaska Airlines deal was found by Cheapflights users on 5/4. 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.
Tue 9/87:00 am
GEG
- SYD
1 stop31h 05m
Alaska Airlines
Thu 10/810:10 am
SYD
- GEG
1 stop21h 07m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$1,124
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 6/87:00 am
GEG
- SYD
1 stop31h 05m
Alaska Airlines
Mon 6/229:10 am
SYD
- GEG
1 stop30h 05m
Alaska Airlines
Deal found 4/30![Alaska Airlines logo]()
$1,134
This oojo deal was found by Cheapflights users on 5/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/177:00 am
GEG
- SYD
1 stop31h 30m
Multiple Airlines
Fri 6/129:10 am
SYD
- GEG
1 stop19h 01m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$1,199
This oojo deal was found by Cheapflights users on 5/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/51:54 pm
GEG
- SYD
1 stop24h 11m
Multiple Airlines
Thu 5/75:50 pm
SYD
- GEG
1 stop21h 59m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$1,214
This oojo deal was found by Cheapflights users on 5/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/14:47 pm
GEG
- SYD
1 stop18h 23m
Multiple Airlines
Sat 11/212:05 pm
SYD
- GEG
1 stop25h 50m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$1,215
This Delta deal was found by Cheapflights users on 5/4. 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.
Sun 5/175:35 am
GEG
- SYD
2 stops32h 15m
Delta
Fri 6/129:15 am
SYD
- GEG
1 stop23h 33m
Delta
Deal found 5/4![Delta logo]()
$1,220
This oojo deal was found by Cheapflights users on 4/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1512:51 pm
GEG
- SYD
1 stop25h 04m
Qantas Airways
Mon 6/2212:00 pm
SYD
- GEG
1 stop25h 43m
Qantas Airways
Deal found 4/30![Qantas Airways logo]()
$1,224
This United Airlines deal was found by Cheapflights users on 5/1. 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 8/812:37 pm
GEG
- SYD
1 stop25h 18m
United Airlines
Wed 8/1210:20 am
SYD
- GEG
1 stop17h 15m
United Airlines
Deal found 5/1![United Airlines logo]()
$1,229
This United Airlines deal was found by Cheapflights users on 4/30. 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 11/15:00 am
GEG
- SYD
2 stops31h 00m
United Airlines
Sat 11/2112:10 pm
SYD
- GEG
1 stop18h 14m
United Airlines
Deal found 4/30![United Airlines logo]()
$1,230
This American Airlines deal was found by Cheapflights users on 5/4. 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.
Wed 12/23:05 pm
GEG
- SYD
2 stops22h 55m
American Airlines
Wed 12/1611:15 am
SYD
- GEG
2 stops21h 34m
American Airlines
Deal found 5/4![American Airlines logo]()
$1,231
This Qantas Airways deal was found by Cheapflights users on 4/30. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:14 pm
BOI
- SYD
1 stop20h 16m
Multiple Airlines
Thu 5/145:50 pm
SYD
- BOI
1 stop21h 08m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$1,248
Best flights from Idaho to SydneyDiscover carefully curated flight deals from Idaho to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 5, 2026.
Discover carefully curated flight deals from Idaho to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 5, 2026.
This Alaska Airlines deal was found by Cheapflights users on 5/4. 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.
Tue 9/87:00 am
GEG
- SYD
1 stop31h 05m
Alaska Airlines
Thu 10/810:10 am
SYD
- GEG
1 stop21h 07m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$1,124
This Delta deal was found by Cheapflights users on 5/4. 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.
Sun 5/176:10 am
GEG
- SYD
2 stops31h 40m
Delta
Fri 6/129:15 am
SYD
- GEG
2 stops31h 40m
Delta
Deal found 5/4![Delta logo]()
$1,220
This oojo deal was found by Cheapflights users on 4/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1512:51 pm
GEG
- SYD
1 stop25h 04m
Qantas Airways
Mon 6/2212:00 pm
SYD
- GEG
1 stop25h 43m
Qantas Airways
Deal found 4/30![Qantas Airways logo]()
$1,224
This Qantas Airways deal was found by Cheapflights users on 5/4. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/14:47 pm
GEG
- SYD
1 stop18h 23m
Multiple Airlines
Sat 11/212:05 pm
SYD
- GEG
1 stop25h 50m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$1,226
This United Airlines deal was found by Cheapflights users on 5/1. 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 11/15:00 am
GEG
- SYD
2 stops31h 00m
United Airlines
Sat 11/2112:10 pm
SYD
- GEG
1 stop18h 14m
United Airlines
Deal found 5/1![United Airlines logo]()
$1,229
This American Airlines deal was found by Cheapflights users on 5/3. 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.
Sun 11/13:05 pm
GEG
- SYD
2 stops22h 55m
American Airlines
Sat 11/2111:15 am
SYD
- GEG
2 stops21h 40m
American Airlines
Deal found 5/3![American Airlines logo]()
$1,230
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 6/87:00 am
GEG
- SYD
1 stop31h 05m
Alaska Airlines
Mon 6/229:10 am
SYD
- GEG
1 stop30h 05m
Alaska Airlines
Deal found 4/30![Alaska Airlines logo]()
$1,134
This United Airlines deal was found by Cheapflights users on 5/1. 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 8/812:37 pm
GEG
- SYD
1 stop25h 18m
United Airlines
Wed 8/1210:20 am
SYD
- GEG
1 stop17h 15m
United Airlines
Deal found 5/1![United Airlines logo]()
$1,229
This Delta deal was found by Cheapflights users on 5/4. 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.
Wed 5/273:14 pm
BOI
- SYD
2 stops23h 36m
Delta
Thu 6/49:15 am
SYD
- BOI
2 stops28h 56m
Delta
Deal found 5/4![Delta logo]()
$1,258
This Delta deal was found by Cheapflights users on 5/4. 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.
Wed 5/273:23 pm
BOI
- SYD
1 stop23h 27m
Delta
Fri 6/59:15 am
SYD
- BOI
2 stops24h 35m
Delta
Deal found 5/4![Delta logo]()
$1,258
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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 10/226:51 pm
BOI
- SYD
1 stop20h 14m
Alaska Airlines
Fri 10/3011:15 am
SYD
- BOI
1 stop28h 40m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$1,304
This United Airlines deal was found by Cheapflights users on 5/2. 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 6/72:40 pm
BOI
- SYD
2 stops24h 20m
United Airlines
Sat 6/2010:20 am
SYD
- BOI
1 stop29h 35m
United Airlines
Deal found 5/2![United Airlines logo]()
$1,305
This Alaska Airlines deal was found by Cheapflights users on 5/3. 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 10/286:57 pm
BOI
- SYD
1 stop20h 03m
Alaska Airlines
Sun 11/111:15 am
SYD
- BOI
1 stop20h 29m
Alaska Airlines
Deal found 5/3![Alaska Airlines logo]()
$1,385
This Delta deal was found by Cheapflights users on 5/4. 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 5/183:23 pm
BOI
- SYD
1 stop23h 27m
Delta
Thu 5/219:15 am
SYD
- BOI
1 stop21h 19m
Delta
Deal found 5/4![Delta logo]()
$1,467
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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 9/307:05 am
BOI
- SYD
1 stop32h 00m
Alaska Airlines
Mon 10/510:10 am
SYD
- BOI
1 stop20h 34m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$1,394
This Delta deal was found by Cheapflights users on 5/1. 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.
Fri 7/244:00 pm
BOI
- SYD
1 stop22h 50m
Delta
Thu 7/309:15 am
SYD
- BOI
2 stops24h 09m
Delta
Deal found 5/1![Delta logo]()
$1,482
Last-minute flights from Idaho to SydneyDiscover last-minute flight deals from Idaho to Sydney. Data last updated May 5, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Sydney. Data last updated May 5, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 5/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/51:54 pm
GEG
- SYD
1 stop24h 11m
Multiple Airlines
Thu 5/75:50 pm
SYD
- GEG
1 stop21h 59m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$1,214
This Qantas Airways deal was found by Cheapflights users on 4/30. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:14 pm
BOI
- SYD
1 stop20h 16m
Multiple Airlines
Thu 5/145:50 pm
SYD
- BOI
1 stop21h 08m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$1,248
This Delta deal was found by Cheapflights users on 4/30. 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.
Tue 5/55:40 am
BOI
- SYD
2 stops33h 10m
Delta
Thu 5/149:15 am
SYD
- BOI
1 stop21h 19m
Delta
Deal found 4/30![Delta logo]()
$1,258
This KAYAK deal was found by Cheapflights users on 5/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:00 am
GEG
- SYD
1 stop31h 55m
Multiple Airlines
Fri 5/85:50 pm
SYD
- GEG
1 stop21h 59m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$1,252
This oojo deal was found by Cheapflights users on 5/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/177:00 am
GEG
- SYD
1 stop31h 30m
Multiple Airlines
Fri 6/129:10 am
SYD
- GEG
1 stop19h 01m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$1,199
This Delta deal was found by Cheapflights users on 5/4. 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.
Sun 5/175:35 am
GEG
- SYD
2 stops32h 15m
Delta
Fri 6/129:15 am
SYD
- GEG
1 stop23h 33m
Delta
Deal found 5/4![Delta logo]()
$1,220
This Delta deal was found by Cheapflights users on 5/4. 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.
Wed 5/273:23 pm
BOI
- SYD
1 stop23h 27m
Delta
Fri 6/59:15 am
SYD
- BOI
1 stop21h 19m
Delta
Deal found 5/4![Delta logo]()
$1,253
This United Airlines deal was found by Cheapflights users on 5/2. 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 6/77:05 pm
BOI
- SYD
1 stop19h 50m
United Airlines
Sat 6/2010:20 am
SYD
- BOI
1 stop29h 35m
United Airlines
Deal found 5/2![United Airlines logo]()
$1,300
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 6/87:00 am
GEG
- SYD
1 stop31h 05m
Alaska Airlines
Mon 6/229:10 am
SYD
- GEG
1 stop30h 05m
Alaska Airlines
Deal found 4/30![Alaska Airlines logo]()
$1,134
This oojo deal was found by Cheapflights users on 4/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/812:51 pm
GEG
- SYD
2 stops26h 59m
Qantas Airways
Mon 6/2212:00 pm
SYD
- GEG
1 stop25h 43m
Qantas Airways
Deal found 4/30![Qantas Airways logo]()
$1,245
This oojo deal was found by Cheapflights users on 4/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1512:51 pm
GEG
- SYD
1 stop25h 04m
Qantas Airways
Mon 6/2212:00 pm
SYD
- GEG
1 stop25h 43m
Qantas Airways
Deal found 4/30![Qantas Airways logo]()
$1,224
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 6/1512:51 pm
GEG
- SYD
2 stops25h 14m
American Airlines
Mon 6/2212:00 pm
SYD
- GEG
1 stop25h 43m
American Airlines
Deal found 4/30![American Airlines logo]()
$1,231
One-way flights from Idaho to SydneySearch for one-way flight options from Idaho to Sydney. Find affordable one-way fares based on user searches. Data last updated May 5, 2026.
Search for one-way flight options from Idaho to Sydney. Find affordable one-way fares based on user searches. Data last updated May 5, 2026.
This oojo deal was found by Cheapflights users on 4/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:47 pm
GEG
- SYD
1 stop20h 18m
Qantas Airways
Deal found 4/30![Qantas Airways logo]()
$644
This Delta deal was found by Cheapflights users on 4/30. 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.
Wed 10/75:20 am
GEG
- SYD
2 stops32h 30m
Delta
Deal found 4/30![Delta logo]()
$648
This Delta deal was found by Cheapflights users on 4/30. 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 10/159:10 am
GEG
- SYD
2 stops28h 40m
Delta
Deal found 4/30![Delta logo]()
$654
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Thu 10/156:07 pm
GEG
- SYD
3 stops56h 33m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$792
Find flight deals from Idaho to Sydney
Keep the following information in mind while searching for Idaho to Sydney flight deals. Data was last updated May 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,109 (oojo) |
One-way from | $644 (oojo) |
Popular in | December |
Cheapest in | March |
Average price | $1,317 |
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 May 5, 2026.
Use the filters below to find and compare flights from Idaho to Sydney that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Tue 9/8
7:00 am-7:05 am
1 stop31h 05m
Sydney Kingsford Smith
Thu 10/8
10:10 am-1:17 pm
1 stop21h 07m
$1,124
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Mon 6/8
7:00 am-7:05 am
1 stop31h 05m
Sydney Kingsford Smith
Mon 6/22
9:10 am-10:15 pm
1 stop30h 05m
$1,134
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Sun 5/17
6:10 am-6:50 am
2 stops31h 40m
Sydney Kingsford Smith
Fri 6/12
9:15 am-11:55 pm
2 stops31h 40m
$1,220
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Mon 6/15
12:51 pm-6:55 am
1 stop25h 04m
Sydney Kingsford Smith
Mon 6/22
12:00 pm-8:43 pm
1 stop25h 43m
$1,224
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Sun 11/1
4:47 pm-6:10 am
1 stop18h 23m
Sydney Kingsford Smith
Sat 11/21
2:05 pm-8:55 pm
1 stop25h 50m
$1,226
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Sun 11/1
5:00 am-7:00 am
2 stops31h 00m
Sydney Kingsford Smith
Sat 11/21
12:10 pm-11:24 am
1 stop18h 14m
$1,229
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Sat 8/8
12:37 pm-6:55 am
1 stop25h 18m
Sydney Kingsford Smith
Wed 8/12
10:20 am-10:35 am
1 stop17h 15m
$1,229
SpokaneSydney
GEG - SYD
GEGSYD
Spokane
Sun 11/1
3:05 pm-9:00 am
2 stops22h 55m
Sydney Kingsford Smith
Sat 11/21
11:15 am-1:55 pm
2 stops21h 40m
$1,230
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Wed 5/27
3:14 pm-6:50 am
2 stops23h 36m
Sydney Kingsford Smith
Thu 6/4
9:15 am-10:11 pm
2 stops28h 56m
$1,258
BoiseSydney
BOI - SYD
BOISYD
Boise Air Term. Gowen Fld
Wed 5/27
3:23 pm-6:50 am
1 stop23h 27m
Sydney Kingsford Smith
Fri 6/5
9:15 am-5:50 pm
2 stops24h 35m
$1,258
Showing 1-10 of 18 resultsSorted by cheapest first
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.
BOI-SYD
GEG-SYD
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
USID-SYD
BOI-SYD
GEG-SYD
How much does it cost to fly round-trip from Idaho to Sydney?
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 locationsParramatta
Wollongong
Coogee
Manly
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
Sydney flight routes
Top destinations
Alternative routes for Idaho to Sydney
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Sydney by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Idaho to Sydney by cabin class
Find flights from Idaho to Sydney, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Idaho and Sydney flights
Browse other Idaho and Sydney flight options. Last updated on May 5, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Sydney
Explore flights to Sydney departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on May 5, 2026.
Idaho to Sydney flights
Consider these flights traveling from Idaho to Sydney.
Top airline flying from Idaho to Sydney
Discover the top airline 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 May 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$1,094 | Average$1,452 | FlexibilityNo cancel fee | On-time69% |