Southwest® flights from Boston to Phoenix from $156

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Low fares from Boston to Phoenix

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Boston (BOS)to

Phoenix (PHX)
Depart: 08/25/2026

One-way

Basic

From
$156
Seen: 18 hrs ago

Boston (BOS)to

Phoenix (PHX)
Depart: 09/11/2026

One-way

Basic

From
$156
Seen: 23 hrs ago

Boston (BOS)to

Phoenix (PHX)
Depart: 08/20/2026

One-way

Basic

From
$156
Seen: 14 hrs ago

Boston (BOS)to

Phoenix (PHX)
Depart: 10/30/2026

One-way

Basic

From
$156
Seen: 13 hrs ago

Boston (BOS)to

Phoenix (PHX)
Depart: 10/24/2026

One-way

Basic

From
$169
Seen: 2 hrs ago

Boston (BOS)to

Phoenix (PHX)
Depart: 09/17/2026

One-way

Basic

From
$174
Seen: 23 hrs ago

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Explore flights from Boston to Phoenix

Aug 2026
From$156*
Seen: 18 hrs ago
One Way/Basic
Sep 2026
From$156*
Seen: 23 hrs ago
One Way/Basic
Oct 2026
From$156*
Seen: 13 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $156
cmp-daily-histogram-bars-legend-max-price-aria-label $445
Displaying fares for August-2026
  • BOS–PHX, 08/01/2026: From $310
    01

    Sat

    AUG

  • BOS–PHX, 08/02/2026: From $364
    02

    Sun

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    03

    Mon

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    04

    Tue

  • BOS–PHX, 08/05/2026: From $315
    05

    Wed

  • BOS–PHX, 08/06/2026: From $339
    06

    Thu

  • BOS–PHX, 08/07/2026: From $349
    07

    Fri

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    08

    Sat

  • BOS–PHX, 08/09/2026: From $445
    09

    Sun

  • BOS–PHX, 08/10/2026: From $339
    10

    Mon

  • BOS–PHX, 08/11/2026: From $315
    11

    Tue

  • BOS–PHX, 08/12/2026: From $315
    12

    Wed

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    13

    Thu

  • BOS–PHX, 08/14/2026: From $234
    14

    Fri

  • BOS–PHX, 08/15/2026: From $234
    15

    Sat

  • BOS–PHX, 08/16/2026: From $234
    16

    Sun

  • BOS–PHX, 08/17/2026: From $244
    17

    Mon

  • BOS–PHX, 08/18/2026: From $234
    18

    Tue

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    19

    Wed

  • BOS–PHX, 08/20/2026: From $156
    20

    Thu

  • BOS–PHX, 08/21/2026: From $214
    21

    Fri

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    22

    Sat

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    23

    Sun

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    24

    Mon

  • BOS–PHX, 08/25/2026: From $156
    25

    Tue

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    26

    Wed

  • BOS–PHX, 08/27/2026: From $174
    27

    Thu

  • BOS–PHX, 08/28/2026: From $217
    28

    Fri

  • BOS–PHX: cmp-view-offers-disclaimer. Find Offers
    29

    Sat

  • BOS–PHX, 08/30/2026: From $221
    30

    Sun

  • BOS–PHX, 08/31/2026: From $174
    31

    Mon

    • Range$156-$445

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Logan International Airport
    Arriving at:
    Sky Harbor International Airport
    Distance:
    2300 miles

    Route Information

    155† Weekly flights

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    There are 155 weekly flights from Boston to Phoenix on Southwest Airlines.
    To find the lowest fares by day and time to fly Boston to Phoenix with Southwest, check out our Low Fare Calendar.
    You can rent a car at Sky Harbor International Airport book yours with your flight.
    Yes! Flights from Boston to Phoenix—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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