$144 Cheap United flights Boston (BOS) to Phoenix (PHX)

View $144 flight on Sat, Jan 17, 2026Opens in a new window

$144 Cheap United flights Boston (BOS) to Phoenix (PHX)

Prices were available within the past 7 days and start at $144 for one-way flights and $217 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Jan 17 - Tue, Jan 20
BOS
Boston
PHX
Phoenix
$217 Roundtrip, found 13 hours ago
$217
Roundtrip
found 13 hours ago
Select United flight, departing Sat, Jan 17 from Boston to Phoenix, returning Tue, Jan 20, priced at $217 found 13 hours ago
United
Thu, Jan 15 - Sun, Jan 18
BOS
Boston
PHX
Phoenix
$250 Roundtrip, found 13 hours ago
$250
Roundtrip
found 13 hours ago
Select United flight, departing Thu, Jan 15 from Boston to Phoenix, returning Sun, Jan 18, priced at $250 found 13 hours ago

Find the cheapest month to fly from Boston (BOS) to Phoenix (PHX)

August is typically the cheapest month to fly

From $158 - $298 per traveler.
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, JetBlue Airways, Southwest Airlines, United
Popular airline
Delta
Distance
3670 km
Average flight time
4 hours 41 mins