$149+ 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
15 Jan — 22 Jan1
1 adult
1 adult, Economy, 0 bags

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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 16 December 2025.

Fri 23/112:19BOI - AUS
1 stop9h 28mUnited Airlines
Sat 24/108:50AUS - BOI
1 stop5h 45mUnited Airlines
Deal found 15/12$319
Fri 9/114:37BOI - AUS
1 stop6h 16mUnited Airlines
Tue 13/109:30AUS - BOI
1 stop7h 40mUnited Airlines
Deal found 14/12$327
Thu 22/114:37BOI - AUS
2 stops7h 22mUnited Airlines
Sun 25/113:58AUS - BOI
1 stop6h 53mUnited Airlines
Deal found 15/12$393
Tue 10/209:02BOI - AUS
1 stop7h 57mAlaska Airlines
Sat 14/215:35AUS - BOI
1 stop9h 24mAlaska Airlines
Deal found 15/12$397
Thu 1/114:30BOI - AUS
1 stop7h 45mSouthwest
Mon 5/120:05AUS - BOI
1 stop5h 40mSouthwest
Deal found 15/12$415
Fri 9/105:40BOI - AUS
2 stops10h 55mDelta
Tue 13/107:20AUS - BOI
2 stops9h 57mDelta
Deal found 14/12$448
Thu 15/110:15BOI - AUS
2 stops12h 41mUnited Airlines
Sun 18/105:10AUS - BOI
2 stops9h 25mUnited Airlines
Deal found 14/12$462
Fri 20/318:00BOI - AUS
1 stop10h 14mAlaska Airlines
Fri 27/318:50AUS - BOI
1 stop19h 57mAlaska Airlines
Deal found 14/12$521
Sat 17/106:23BOI - GRK
2 stops11h 30mAlaska Airlines
Wed 21/112:31GRK - BOI
1 stop7h 54mAlaska Airlines
Deal found 15/12$748
Mon 29/1206:08BOI - GRK
2 stops10h 48mAlaska Airlines
Fri 2/106:00GRK - BOI
1 stop7h 37mAlaska Airlines
Deal found 14/12$1,472
Wed 28/114:20BOI - SYD
1 stop22h 00mUnited Airlines
Wed 4/214:00SYD - BOI
1 stop25h 23mUnited Airlines
Deal found 14/12$1,750
Sat 17/114:20BOI - SYD
1 stop22h 00mUnited Airlines
Sat 24/111:20SYD - BOI
1 stop26h 31mUnited Airlines
Deal found 15/12$1,900

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 16 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

Fri 9/1

14:37-21:53

1 stop6h 16m

Austin Bergstrom

Tue 13/1

09:30-16:10

1 stop7h 40m

$327

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Thu 22/1

10:48-18:27

1 stop6h 39m

Austin Bergstrom

Sun 25/1

13:58-19:51

1 stop6h 53m

$327

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Fri 23/1

10:48-18:27

1 stop6h 39m

Austin Bergstrom

Sat 24/1

13:00-21:23

2 stops9h 23m

$334

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Tue 10/2

09:02-17:59

1 stop7h 57m

Austin Bergstrom

Sat 14/2

15:35-23:59

1 stop9h 24m

$397

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Sun 11/1

05:40-17:35

2 stops10h 55m

Austin Bergstrom

Sun 18/1

07:20-18:28

2 stops12h 08m

$448

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Fri 9/1

05:40-17:35

2 stops10h 55m

Austin Bergstrom

Tue 13/1

07:20-16:17

2 stops9h 57m

$448

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Thu 22/1

09:15-22:24

2 stops12h 09m

Austin Bergstrom

Sun 25/1

07:20-18:28

2 stops12h 08m

$448

BoiseKilleen

BOI - GRK

BOIGRK

Boise Air Term. Gowen Fld

Sat 17/1

06:23-18:53

2 stops11h 30m

Killeen Fort Hood Regional

Wed 21/1

07:00-13:08

1 stop7h 08m

$748

BoiseKilleen

BOI - GRK

BOIGRK

Boise Air Term. Gowen Fld

Mon 29/12

06:08-17:56

2 stops10h 48m

Killeen Fort Hood Regional

Fri 2/1

06:00-12:37

1 stop7h 37m

$1,472

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Wed 28/1

14:20-06:20

1 stop22h 00m

Sydney Kingsford Smith

Wed 4/2

14:00-21:23

1 stop25h 23m

$1,750

Flights are sorted by cheapest return flights first.

Deals found on 13/12

Showing 1-10 of 29 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 $1,333). Flying from Boise in July will prove the most costly (average of $2,191). 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 16 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.

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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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