$121 Cheap United flights Boston (BOS) to Phoenix (PHX)

View $121 flight on Wed, Sep 24, 2025Opens in a new window

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$121 Cheap United flights Boston (BOS) to Phoenix (PHX)

Prices were available within the past 7 days and start at $121 for one-way flights and $207 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Aug 27 - Thu, Sep 4
BOS
Boston
PHX
Phoenix
$207 Roundtrip, found 11 hours ago
$207
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Aug 27 from Boston to Phoenix, returning Thu, Sep 4, priced at $207 found 11 hours ago
United
Tue, Sep 9 - Thu, Sep 11
BOS
Boston
PHX
Phoenix
$228 Roundtrip, just found
$228
Roundtrip
just found
Select United flight, departing Tue, Sep 9 from Boston to Phoenix, returning Thu, Sep 11, priced at $228 just found
United
Tue, Sep 16 - Thu, Sep 18
BOS
Boston
PHX
Phoenix
$232 Roundtrip, just found
$232
Roundtrip
just found
Select United flight, departing Tue, Sep 16 from Boston to Phoenix, returning Thu, Sep 18, priced at $232 just found
United
Wed, Sep 24 - Fri, Sep 26
BOS
Boston
PHX
Phoenix
$233 Roundtrip, just found
$233
Roundtrip
just found
Select United flight, departing Wed, Sep 24 from Boston to Phoenix, returning Fri, Sep 26, priced at $233 just found
United
Sat, Sep 6 - Mon, Sep 8
BOS
Boston
PHX
Phoenix
$235 Roundtrip, just found
$235
Roundtrip
just found
Select United flight, departing Sat, Sep 6 from Boston to Phoenix, returning Mon, Sep 8, priced at $235 just found
United
Mon, Aug 25 - Thu, Sep 4
BOS
Boston
PHX
Phoenix
$241 Roundtrip, found 7 hours ago
$241
Roundtrip
found 7 hours ago
Select United flight, departing Mon, Aug 25 from Boston to Phoenix, returning Thu, Sep 4, priced at $241 found 7 hours ago
Flights from Boston (BOS) to Phoenix (PHX)
Origin airport
Logan Intl.
Destination airport
Sky Harbor Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines, Sun Country Airlines, United
Popular airline
JetBlue Airways
Distance
2294 mi
Average flight time
2 hours 37 mins

Frequently asked questions

How much is a United Airlines flight from Logan Intl. Airport (BOS) to Sky Harbor Intl. Airport (PHX)?
Apply the "Price (lowest to highest)" filter on Expedia to search for cheap United Airlines round-trip flights from $207 from BOS to PHX. Affordable one-way options from $121 are available as well.**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.
What is the cheapest month to fly from BOS to PHX with United Airlines?
United Airlines flights to Phoenix are generally more affordable in the low-season months of July and August. Whether you're after a one-way or a return ticket, you could score a better deal then.
What is the cheapest time to book flights from Logan Intl. Airport (BOS) to Sky Harbor Intl. Airport (PHX) with United Airlines?
Look for affordable United Airlines flights from Logan Intl. Airport (BOS) to Sky Harbor Intl. Airport (PHX) one to three months prior to your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the best day of the week to book a domestic flight is usually Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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.
Does United Airlines fly nonstop from Logan Intl. Airport (BOS) to Sky Harbor Intl. Airport (PHX)?
To figure out if there's a direct journey from BOS to PHX with United Airlines or other airlines, check the "Nonstop" box when looking for tickets.
What is the earliest United Airlines flight from BOS to PHX?
Find United Airlines's earliest flights from BOS to PHX by using our "Morning" and "Early Morning" filters. Not only will you get to your destination sooner, early departures also have a 20% less chance of being canceled.**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.
What airports does United Airlines fly into in Phoenix?
Take a United Airlines flight from Logan Intl. Airport (BOS) to Phoenix, and you'll probably touch down at Sky Harbor Intl. Airport (PHX). This is the airline's primary hub in this city.
Why fly with United Airlines from BOS to PHX?
Journey from BOS to PHX with United Airlines and you can look forward to a host of benefits starting with a rewarding loyalty program. When you book through Expedia as a United Mileage Plus and One Key™ member, you could also earn OneKeyCash™* to spend on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Logan Intl. Airport (BOS) to Sky Harbor Intl. Airport (PHX)?
Depending on the type of fare you purchased, a fee may apply if you change or cancel your booking more than 24 hours after it's confirmed. To secure flexible fares, select our "Changes included" and "No cancel fee" boxes while looking for flights. To learn more about canceling or changing your reservation, visit "Trips," select your flight and tick "Manage Booking."

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