Southwest® flights from Baltimore/Washington to Portland, ME from $129

Promo Code

Low fares from Baltimore/Washington to Portland, ME

$

Baltimore/Washington (BWI)to

Portland, ME (PWM)
Depart: 09/22/2026

One-way

Basic

From
$129
Seen: 1 hour ago

Baltimore/Washington (BWI)to

Portland, ME (PWM)
Depart: 11/23/2026

One-way

Basic

From
$129
Seen: 55 minutes ago

Baltimore/Washington (BWI)to

Portland, ME (PWM)
Depart: 09/12/2026

One-way

Basic

From
$129
Seen: 59 minutes ago

Baltimore/Washington (BWI)to

Portland, ME (PWM)
Depart: 10/20/2026

One-way

Basic

From
$139
Seen: 22 hrs ago

Baltimore/Washington (BWI)to

Portland, ME (PWM)
Depart: 10/13/2026

One-way

Basic

From
$139
Seen: 21 hrs ago

Baltimore/Washington (BWI)to

Portland, ME (PWM)
Depart: 11/11/2026

One-way

Basic

From
$139
Seen: 13 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Baltimore/Washington to Portland, ME

Aug 2026
From$342*
Seen: 9 hrs ago
One Way/Basic
Sep 2026
From$129*
Seen: 1 hour ago
One Way/Basic
Oct 2026
From$139*
Seen: 13 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $129
cmp-daily-histogram-bars-legend-max-price-aria-label $403
Displaying fares for August-2026
  • BWI–PWM, 08/22/2026: From $403
    22

    Sat

    AUG

  • BWI–PWM: cmp-view-offers-disclaimer. Find Offers
    23

    Sun

  • BWI–PWM: cmp-view-offers-disclaimer. Find Offers
    24

    Mon

  • BWI–PWM, 08/25/2026: From $403
    25

    Tue

  • BWI–PWM, 08/26/2026: From $403
    26

    Wed

  • BWI–PWM, 08/27/2026: From $342
    27

    Thu

  • BWI–PWM, 08/28/2026: From $342
    28

    Fri

  • BWI–PWM: cmp-view-offers-disclaimer. Find Offers
    29

    Sat

  • BWI–PWM, 08/30/2026: From $342
    30

    Sun

  • BWI–PWM: cmp-view-offers-disclaimer. Find Offers
    31

    Mon

  • BWI–PWM: cmp-view-offers-disclaimer. Find Offers
    01

    Tue

    SEP

  • BWI–PWM, 09/02/2026: From $342
    02

    Wed

  • BWI–PWM, 09/03/2026: From $273
    03

    Thu

  • BWI–PWM, 09/04/2026: From $262
    04

    Fri

  • BWI–PWM, 09/05/2026: From $250
    05

    Sat

  • BWI–PWM, 09/06/2026: From $250
    06

    Sun

  • BWI–PWM, 09/07/2026: From $250
    07

    Mon

  • BWI–PWM, 09/08/2026: From $250
    08

    Tue

  • BWI–PWM, 09/09/2026: From $250
    09

    Wed

  • BWI–PWM, 09/10/2026: From $243
    10

    Thu

  • BWI–PWM, 09/11/2026: From $147
    11

    Fri

  • BWI–PWM, 09/12/2026: From $129
    12

    Sat

  • BWI–PWM: cmp-view-offers-disclaimer. Find Offers
    13

    Sun

  • BWI–PWM, 09/14/2026: From $139
    14

    Mon

  • BWI–PWM, 09/15/2026: From $139
    15

    Tue

  • BWI–PWM: cmp-view-offers-disclaimer. Find Offers
    16

    Wed

  • BWI–PWM, 09/17/2026: From $139
    17

    Thu

  • BWI–PWM, 09/18/2026: From $262
    18

    Fri

  • BWI–PWM, 09/19/2026: From $167
    19

    Sat

  • BWI–PWM: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

  • BWI–PWM: cmp-view-offers-disclaimer. Find Offers
    21

    Mon

    • Range$129-$403

    *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:
    Balt./Wash. International Airport
    Arriving at:
    Portland International Jetport
    Average flight time:
    1 hour 30 minutes
    Distance:
    452 miles

    Route Information

    24† Weekly flights
    • 4‡ Nonstop flights per day Monday through Friday
    • 4‡ Nonstop flights on Saturday
    • 4‡ Nonstop flights on Sunday

    † 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

    The average flight time from Baltimore/Washington to Portland, ME is 1 hour 30 minutes.
    There are 24 weekly flights from Baltimore/Washington to Portland, ME on Southwest Airlines.
    Yes, Southwest flies nonstop from Baltimore/Washington to Portland, ME 4 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Baltimore/Washington to Portland, ME 4 times per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Baltimore/Washington to Portland, ME with Southwest, check out our Low Fare Calendar.
    You can rent a car at Portland International Jetport book yours with your flight.
    Yes! Flights from Baltimore/Washington to Portland, ME—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.

    Explore Flights from Other Popular Origins

    Popular Flights from Baltimore/Washington