$99 Cheap Delta flights Boise (BOI) to Phoenix (PHX)

Landing cheap one-way Delta Air Lines flights from BOI to PHX from $99 on Expedia is easy — just filter by “Price (lowest to highest).” Alternatively, check out our affordable return fares from $197 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

July is one of the least expensive months to jet off to Phoenix with Delta Air Lines. You could also find great deals on one-way and return fares in August.

Begin your search one to three months ahead of your travel date to score cheaper fares on Delta Air Lines flights from Boise Airport (BOI) to Sky Harbor Intl. Airport (PHX). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Fill in your dates, press search and check “Nonstop” on Expedia to find any direct flights from BOI to PHX with Delta Air Lines or another airline.

To find the earliest departures from BOI to PHX with Delta Air Lines, sort your results by “Early Morning” and “Morning.” Choosing an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Delta Air Lines flights from Boise Airport (BOI) to Phoenix come in to land at Sky Harbor Intl. Airport (PHX). This is the main gateway here.

Offering an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is the leading choice for many travelers heading from BOI to PHX. What’s more, if you’re a Delta SkyMiles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be used on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are generally free within 24 hours of making a booking, but your airline may charge you after that time. For more information about modifying your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to make changes without additional costs, tick the “Changes included” or “No cancel fee” filter when planning your next break.