$151+ 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
31 Dec — 7 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 1 December 2025.

Fri 6/308:50BOI - AUS
2 stops12h 19mDelta
Tue 10/318:06AUS - BOI
1 stop6h 53mDelta
Deal found 29/11$429
Sun 18/113:55BOI - AUS
1 stop9h 04mAlaska Airlines
Thu 22/115:39AUS - BOI
1 stop9h 03mAlaska Airlines
Deal found 29/11$442
Sat 13/1208:45BOI - AUS
1 stop7h 20mDelta
Mon 19/105:30AUS - BOI
1 stop8h 00mDelta
Deal found 29/11$449
Fri 16/107:45BOI - AUS
1 stop9h 42mUnited Airlines
Mon 19/112:27AUS - BOI
2 stops10h 25mUnited Airlines
Deal found 29/11$452
Thu 15/105:40BOI - AUS
2 stops10h 55mDelta
Sun 18/112:00AUS - BOI
2 stops9h 12mDelta
Deal found 29/11$455
Thu 25/1212:05BOI - AUS
1 stop6h 10mSouthwest
Wed 31/1205:35AUS - BOI
1 stop6h 50mSouthwest
Deal found 29/11$456
Wed 31/1218:00BOI - AUS
1 stop11h 40mAlaska Airlines
Mon 5/117:46AUS - BOI
1 stop7h 11mAlaska Airlines
Deal found 29/11$487
Sun 18/105:45BOI - AUS
1 stop7h 00mDelta
Thu 22/107:20AUS - BOI
2 stops9h 57mDelta
Deal found 29/11$510
Fri 13/213:51BOI - AUS
2 stops9h 43mDelta
Sun 15/207:20AUS - BOI
2 stops12h 02mDelta
Deal found 30/11$529
Thu 25/1211:45BOI - AUS
1 stop7h 05mSouthwest
Tue 30/1219:55AUS - BOI
1 stop5h 45mSouthwest
Deal found 29/11$540
Sat 10/106:23BOI - GRK
2 stops11h 30mAlaska Airlines
Tue 13/112:31GRK - BOI
2 stops11h 30mAlaska Airlines
Deal found 29/11$766
Wed 17/1206:44BOI - GRK
1 stop7h 53mAlaska Airlines
Wed 24/1211:57GRK - BOI
2 stops13h 00mAlaska Airlines
Deal found 30/11$947

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 1 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

Sun 18/1

06:23-15:54

1 stop8h 31m

Austin Bergstrom

Thu 22/1

07:15-15:10

1 stop8h 55m

$442

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Sat 13/12

08:45-17:05

1 stop7h 20m

Austin Bergstrom

Mon 19/1

05:30-12:30

1 stop8h 00m

$449

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Thu 15/1

05:40-17:35

2 stops10h 55m

Austin Bergstrom

Sun 18/1

12:00-20:12

2 stops9h 12m

$455

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Fri 16/1

10:39-00:34

2 stops12h 55m

Austin Bergstrom

Mon 19/1

13:59-23:59

2 stops11h 00m

$455

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Thu 25/12

08:05-18:10

2 stops9h 05m

Austin Bergstrom

Wed 31/12

05:35-11:25

1 stop6h 50m

$464

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Wed 31/12

18:00-06:40

1 stop11h 40m

Austin Bergstrom

Mon 5/1

17:46-23:57

1 stop7h 11m

$487

BoiseAustin

BOI - AUS

BOIAUS

Boise Air Term. Gowen Fld

Sun 18/1

05:45-13:45

1 stop7h 00m

Austin Bergstrom

Thu 22/1

07:20-16:17

2 stops9h 57m

$510

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

12:31-23:01

2 stops11h 30m

$766

BoiseKilleen

BOI - GRK

BOIGRK

Boise Air Term. Gowen Fld

Wed 17/12

06:44-15:37

1 stop7h 53m

Killeen Fort Hood Regional

Wed 24/12

11:57-23:57

2 stops13h 00m

$947

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Tue 13/1

07:20-06:55

1 stop29h 35m

Sydney Kingsford Smith

Tue 20/1

14:05-19:25

1 stop23h 20m

$1,728

Flights are sorted by cheapest return flights first.

Deals found on 29/11

Showing 1-10 of 33 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 $1,352). Flying from Boise in July will prove the most costly (average of $2,221). 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 1 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, Denver, Cancún. Denver, Dallas/Fort Worth Airport, Cancún 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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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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