Earn point on your loyalty program!arrow arc left

Cheap flights from Boise (BOI) to Sydney (SYD)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Boise (BOI) to Sydney (SYD)

How to find the cheapest flight from Boise (BOI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Boise (BOI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Boise (BOI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Boise to Sydney in September , October 2026

29 Sep - 06 Oct $ 1,695.00
BOI
Boise
Alaska Airlines
1 STOPS
SYD
Sydney
SYD
Sydney
Alaska Airlines
1 STOPS
BOI
Boise
Pick dates
29 Sep - 07 Oct $ 2,102.00
BOI
Boise
Alaska Airlines
1 STOPS
SYD
Sydney
SYD
Sydney
Alaska Airlines
2 STOPS
BOI
Boise
Pick dates
27 Sep - 06 Oct $ 3,266.00
BOI
Boise
Alaska Airlines
1 STOPS
SYD
Sydney
SYD
Sydney
Alaska Airlines
1 STOPS
BOI
Boise
Pick dates

Last minute flights from Boise to Sydney

28 Sep - 01 Oct $ 2,003.00
BOI
Boise
Alaska Airlines
2 STOPS
SYD
Sydney
SYD
Sydney
Alaska Airlines
3 STOPS
BOI
Boise
Pick dates
27 Sep - 30 Sep $ 2,185.00
BOI
Boise
Alaska Airlines
2 STOPS
SYD
Sydney
SYD
Sydney
Alaska Airlines
2 STOPS
BOI
Boise
Pick dates
27 Sep - 30 Sep $ 2,821.00
BOI
Boise
Alaska Airlines
1 STOPS
SYD
Sydney
SYD
Sydney
Alaska Airlines
2 STOPS
BOI
Boise
Pick dates

One-way flights to Sydney from Boise

2:50 PM - 11:30 PM
Qantas
2 Stops
24h 40m
BOI - SYD
$ 826
Kiwi
Pick dates
7:05 AM - 11:30 PM
Qantas
1 Stops
32h 25m
BOI - SYD
$ 1,173
Kiwi
Pick dates
6:50 PM - 11:05 PM
United Airlines
1 Stops
20h 5m
BOI - SYD
$ 1,323
Kiwi
Pick dates

How to find the cheapest flight from Boise (BOI) to Sydney (SYD)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Boise (BOI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Boise (BOI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.