Southwest® flights from Boston to Philadelphia from $128

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Low fares from Boston to Philadelphia

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Boston (BOS)to

Philadelphia (PHL)
Depart: 10/23/2026

One-way

Basic

From
$128
Seen: 8 hrs ago

Boston (BOS)to

Philadelphia (PHL)
Depart: 11/05/2026

One-way

Basic

From
$128
Seen: 16 hrs ago

Boston (BOS)to

Philadelphia (PHL)
Depart: 09/12/2026

One-way

Basic

From
$128
Seen: 10 hrs ago

Boston (BOS)to

Philadelphia (PHL)
Depart: 09/11/2026

One-way

Basic

From
$133
Seen: 7 hrs ago

Boston (BOS)to

Philadelphia (PHL)
Depart: 10/24/2026

One-way

Basic

From
$154
Seen: 19 hrs ago

Boston (BOS)to

Philadelphia (PHL)
Depart: 11/05/2026

One-way

Choice

From
$163
Seen: 16 hrs ago

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Explore flights from Boston to Philadelphia

Aug 2026
From$254*
Seen: 6 hrs ago
One Way/Basic
Sep 2026
From$128*
Seen: 10 hrs ago
One Way/Basic
Oct 2026
From$128*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $128
cmp-daily-histogram-bars-legend-max-price-aria-label $408
Displaying fares for August-2026
  • BOS–PHL, 08/18/2026: From $408
    18

    Tue

    AUG

  • BOS–PHL, 08/19/2026: From $364
    19

    Wed

  • BOS–PHL, 08/20/2026: From $393
    20

    Thu

  • BOS–PHL, 08/21/2026: From $408
    21

    Fri

  • BOS–PHL, 08/22/2026: From $349
    22

    Sat

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

    Sun

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

    Mon

  • BOS–PHL, 08/25/2026: From $254
    25

    Tue

  • BOS–PHL, 08/26/2026: From $254
    26

    Wed

  • BOS–PHL, 08/27/2026: From $254
    27

    Thu

  • BOS–PHL, 08/28/2026: From $254
    28

    Fri

  • BOS–PHL, 08/29/2026: From $254
    29

    Sat

  • BOS–PHL, 08/30/2026: From $321
    30

    Sun

  • BOS–PHL, 08/31/2026: From $254
    31

    Mon

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    01

    Tue

    SEP

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    02

    Wed

  • BOS–PHL, 09/03/2026: From $228
    03

    Thu

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

    Fri

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    05

    Sat

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    06

    Sun

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    07

    Mon

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

    Tue

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    09

    Wed

  • BOS–PHL, 09/10/2026: From $164
    10

    Thu

  • BOS–PHL, 09/11/2026: From $133
    11

    Fri

  • BOS–PHL, 09/12/2026: From $128
    12

    Sat

  • BOS–PHL, 09/13/2026: From $376
    13

    Sun

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    14

    Mon

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    16

    Wed

  • BOS–PHL: cmp-view-offers-disclaimer. Find Offers
    17

    Thu

    • Range$128-$408

    *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:
    Philadelphia International Airport
    Distance:
    280 miles

    Route Information

    33† 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 33 weekly flights from Boston to Philadelphia on Southwest Airlines.
    To find the lowest fares by day and time to fly Boston to Philadelphia with Southwest, check out our Low Fare Calendar.
    You can rent a car at Philadelphia International Airport book yours with your flight.
    Yes! Flights from Boston to Philadelphia—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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