$69 Cheap Flights from Phoenix (PHX) to Boise (BOI)

View $69 flight on Fri, Sep 5, 2025Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI)

Cheap Flights from Phoenix to Boise (PHX-BOI)

Prices were available within the past 7 days and start at $69 for one-way flights and $137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Tue, Oct 21 - Tue, Oct 28
PHX
Phoenix
BOI
Boise
$137 Roundtrip, found 1 day ago
$137
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, Oct 21 from Phoenix to Boise, returning Tue, Oct 28, priced at $137 found 1 day ago
Southwest Airlines
Fri, Sep 5 - Sun, Sep 7
PHX
Phoenix
BOI
Boise
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Southwest Airlines flight, departing Fri, Sep 5 from Phoenix to Boise, returning Sun, Sep 7, priced at $137 just found
American Airlines
Fri, Aug 22 - Mon, Aug 25
PHX
Phoenix
BOI
Boise
$137 Roundtrip, found 2 hours ago
$137
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Fri, Aug 22 from Phoenix to Boise, returning Mon, Aug 25, priced at $137 found 2 hours ago
Southwest Airlines
Fri, Aug 22 - Mon, Aug 25
PHX
Phoenix
BOI
Boise
$138 Roundtrip, found 2 hours ago
$138
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Fri, Aug 22 from Phoenix to Boise, returning Mon, Aug 25, priced at $138 found 2 hours ago
Southwest Airlines
Fri, Aug 22 - Mon, Aug 25
PHX
Phoenix
BOI
Boise
$147 Roundtrip, found 2 hours ago
$147
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Fri, Aug 22 from Phoenix to Boise, returning Mon, Aug 25, priced at $147 found 2 hours ago
American Airlines
Sun, Aug 17 - Wed, Aug 20
PHX
Phoenix
BOI
Boise
$148 Roundtrip, found 2 days ago
$148
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sun, Aug 17 from Phoenix to Boise, returning Wed, Aug 20, priced at $148 found 2 days ago
Southwest Airlines
Fri, Aug 22 - Mon, Aug 25
PHX
Phoenix
BOI
Boise
$152 Roundtrip, found 2 hours ago
$152
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Fri, Aug 22 from Phoenix to Boise, returning Mon, Aug 25, priced at $152 found 2 hours ago
Southwest Airlines
Tue, Aug 12 - Tue, Aug 19
PHX
Phoenix
BOI
Boise
$153 Roundtrip, found 2 days ago
$153
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Tue, Aug 12 from Phoenix to Boise, returning Tue, Aug 19, priced at $153 found 2 days ago
Alaska Airlines
Fri, Aug 22 - Sun, Aug 24
PHX
Phoenix
BOI
Boise
$157 Roundtrip, found 1 hour ago
$157
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Fri, Aug 22 from Phoenix to Boise, returning Sun, Aug 24, priced at $157 found 1 hour ago
Spirit Airlines
Thu, Oct 23 - Mon, Oct 27
PHX
Phoenix
BOI
Boise
$165 Roundtrip, found 4 hours ago
$165
Roundtrip
found 4 hours ago
Select Spirit Airlines flight, departing Thu, Oct 23 from Phoenix to Boise, returning Mon, Oct 27, priced at $165 found 4 hours ago

Find the cheapest month to fly from Phoenix (PHX) to Boise (BOI)

September is typically the cheapest month to fly

From $100 - $224 per traveler.

Graph displaying average flight prices per month

Flights from Phoenix (PHX) to Boise (BOI)
Origin airport
Sky Harbor Intl.
Destination airport
Boise
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$135
Distance
735 mi
Average flight time
3 hours 27 mins

Phoenix to Boise Flights

The cheapest times to fly from Phoenix to Boise

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phoenix to Boise are during the month of October. You can find some of the cheapest flights from Phoenix to Boise with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Boise

Sunday is one of the best days to book for cheap flights from Phoenix to Boise: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Phoenix to Boise

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phoenix to Boise in 2025. You can also book with separate airlines for your outbound and return journeys, from $69 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phoenix to Boise flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phoenix to Boise airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI) cost?
Cheap return flights from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI) start from $136. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving PHX on July 29 2025 and touching down at BOI. The price was last updated on July 2 2025 and has not changed since.
What is the cheapest month to fly from PHX to BOI?
The cheapest flights from PHX to BOI are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI)?
Choose from 3 airlines that fly nonstop from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI). Including:

  • American Airlines
  • Southwest Airlines
  • Alaska Airlines

What is the cheapest airline that flies from PHX to BOI?
With tickets starting at $69 for a one-way flight from PHX to BOI, Southwest Airlines is currently the cheapest carrier flying this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from PHX on September 26 2025. Prices were last updated on July 2 2025 and have not changed since.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI)?
With an average of 5 nonstop flights departing from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI) daily, you'll be up in the air in no time.
What are the most popular departure times for flights from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI)?
The 2 PM departures from PHX to BOI see the highest demand. Prices can be higher for these popular slots. If you want to save on your fare, book during off-peak hours.
What day of the week has the most flights from PHX to BOI?
Sunday has the most flights from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI). Consider leaving on this day and you'll have a greater chance of finding a departure that fits your plans.
What is the earliest flight from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI)?
Take the earliest flight at around 9:30AM UTC-7, leaving from Sky Harbor Intl. Airport (PHX). You'll be in the air for roughly 2h 10m, touching down at Boise Airport (BOI) at approximately 11:40AM UTC-7.
How long does it take to fly from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI)?
It takes approximately 2 hours and 17 minutes to cover the 740 mi from PHX to BOI.
What airline has the least delays from PHX to BOI?
Alaska Airlines has the strongest track record for on-time direct flights from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI), with an on-time rating of 85%. Use the Expedia App to look up your flight schedule before you leave and get immediate updates about any changes.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI)?
To avoid possible delays on the Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI) route, aim to travel before 3 PM. Departures after this hour are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Boise from Sky Harbor Intl. Airport (PHX)?
Browse your flight options from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI). This is the only airport in Boise you can arrive at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI) last-minute?
Last-minute bookings from PHX to BOI are typically more expensive. For the best prices, start looking for flights ahead of time. That said, if you're flexible with your travel plans, you may find a cheap ticket right before your journey.
Is it cheaper to book a PHX to BOI flight and hotel package?
You'll generally save money by booking a PHX to BOI flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After choosing your ideal flights and accommodations, consider adding extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Boise Airport (BOI)?
It's generally possible to reschedule or cancel your PHX to BOI flight. However, if it's been more than 24 hours since booking, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.