$150+ Cheap flights from Boise

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
BOI — SYD
20 Jan — 27 Jan1
1 adult
1 adult, Economy, 0 bags

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Enter your travel dates to find the best prices.

Cheapest flights from Boise
Explore the most affordable flight options available from Boise. Find the lowest fares based on data from user searches, with prices last updated on 21 December 2025.

Wed 21/109:02BOI - AUS
1 stop7h 57mAlaska Airlines
Sat 24/107:15AUS - BOI
1 stop8h 55mAlaska Airlines
Deal found 18/12$327
Sun 18/113:41BOI - AUS
1 stop9h 39mDelta
Sun 25/105:30AUS - BOI
1 stop8h 00mDelta
Deal found 19/12$328
Thu 22/106:10BOI - AUS
1 stop5h 46mUnited Airlines
Mon 26/113:58AUS - BOI
2 stops8h 25mUnited Airlines
Deal found 20/12$336
Sat 17/117:55BOI - AUS
1 stop29h 04mAlaska Airlines
Tue 3/212:30AUS - BOI
1 stop23h 22mAlaska Airlines
Deal found 20/12$342
Thu 26/207:30BOI - AUS
1 stop7h 30mDelta
Mon 2/316:55AUS - BOI
1 stop7h 50mDelta
Deal found 20/12$343
Sat 17/105:40BOI - AUS
1 stop9h 20mDelta
Tue 3/207:20AUS - BOI
2 stops12h 08mDelta
Deal found 19/12$351
Thu 22/105:40BOI - AUS
2 stops10h 55mDelta
Mon 26/112:00AUS - BOI
2 stops10h 58mDelta
Deal found 20/12$360
Sat 31/106:23BOI - AUS
1 stop8h 31mAlaska Airlines
Thu 5/215:39AUS - BOI
1 stop9h 03mAlaska Airlines
Deal found 19/12$382
Sat 31/109:48BOI - AUS
2 stops10h 42mUnited Airlines
Thu 5/213:58AUS - BOI
1 stop6h 53mUnited Airlines
Deal found 19/12$392
Sat 10/106:23BOI - GRK
2 stops11h 30mAlaska Airlines
Tue 13/112:31GRK - BOI
1 stop7h 54mAlaska Airlines
Deal found 19/12$1,022
Sat 31/107:05BOI - SYD
1 stop30h 20mMultiple Airlines
Sat 14/217:45SYD - BOI
2 stops22h 55mMultiple Airlines
Deal found 20/12$1,890
Mon 1/617:51BOI - SYD
1 stop21h 14mMultiple Airlines
Sat 6/606:25SYD - BOI
2 stops24h 19mMultiple Airlines
Deal found 19/12$1,891

Find flights from Boise within your budget

 
Find flights departing from Boise that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 21 December 2025. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Sydney

Route

Depart

Return

Price

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Wed 21/1

09:02-17:59

1 stop7h 57m

Austin Bergstrom

Sat 24/1

07:15-15:10

1 stop8h 55m

$327

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Sat 24/1

09:02-17:59

1 stop7h 57m

Austin Bergstrom

Wed 28/1

07:15-15:10

1 stop8h 55m

$327

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Thu 22/1

10:48-18:27

1 stop6h 39m

Austin Bergstrom

Mon 26/1

17:58-23:48

1 stop6h 50m

$328

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Fri 23/1

14:37-22:59

2 stops7h 22m

Austin Bergstrom

Sun 25/1

13:58-19:51

1 stop6h 53m

$336

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Sat 24/1

10:48-18:27

1 stop6h 39m

Austin Bergstrom

Wed 28/1

13:00-21:23

2 stops9h 23m

$336

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Sat 17/1

17:55-23:59

1 stop29h 04m

Austin Bergstrom

Tue 3/2

12:30-10:52

1 stop23h 22m

$342

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Sat 17/1

05:40-16:00

1 stop9h 20m

Austin Bergstrom

Tue 3/2

07:20-18:28

2 stops12h 08m

$351

BoiseKilleen

BOI - GRK

BOIGRK

Boise Air Term. Gowen Fld

Sat 10/1

06:23-18:53

2 stops11h 30m

Killeen Fort Hood Regional

Tue 13/1

12:31-19:25

1 stop7h 54m

$1,022

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 1/6

17:51-07:05

1 stop21h 14m

Sydney Kingsford Smith

Sat 6/6

06:25-14:44

2 stops24h 19m

$1,891

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 17/2

07:11-10:30

2 stops33h 19m

Sydney Kingsford Smith

Tue 24/2

11:20-20:55

1 stop27h 35m

$1,906

Flights are sorted by cheapest return flights first.

Deals found on 20/12

Showing 1-10 of 30 results
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Best time to book a flight from Boise

Have a flexible travel schedule? Discover the best time to fly from Boise with our price prediction graph.
Estimated return 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.

Travel insights for flights from Boise

Get recent, data-driven insights about flights from Boise including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Boise?

Currently, September is the cheapest month in which you can book a flight from Boise (average of $1,339). Flying from Boise in July will prove the most costly (average of $2,201). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

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Related info for your journey

Access useful and relevant information related to your journey from Boise. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 21 December 2025.

  • What are the most popular destinations to fly to from Boise?

    For the current month, the most popular flights from Boise are Guadalajara, Honolulu, Denver. Denver, Honolulu, Dallas/Fort Worth Airport are the most popular locations from Boise year round.

  • What is the cheapest month to fly from Boise?

    Currently, the cheapest month for flights from Boise is September. The most expensive month for flights is July. The cheapest prices are shown above but prices will vary according to departure times, airlines, class and how early you book.

  • How does Cheapflights help users find flights from Boise?

    900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight from Boise today with Cheapflights!

  • Why should you use Cheapflights to find cheap flight tickets from Boise?

    Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Boise for you. Better yet — we are completely free to use.

  • Can Cheapflights find flights from Boise with no change fees?

    Certainly. Search results for flights from Boise shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

  • Can Cheapflights notify me if prices for flights from Boise become cheaper?

    Yes, Cheapflights offers price alerts on flights from Boise so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

See more FAQs

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Boise?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight from Boise today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Boise?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Boise for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Boise with no change fees?

Certainly. Search results for flights from Boise shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Boise become cheaper?

Yes, Cheapflights offers price alerts on flights from Boise so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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