American Airlines flights from Portland, ME to San Diego

Recent searches for flights from Portland, ME to San Diego

Aug 2026
From$351*
Updated: 11 hours ago
Round tripIEconomy
Sep 2026
From$338*
Updated: 11 hours ago
Round tripIEconomy
Oct 2026
From$369*
Updated: 11 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $351
cmp-daily-histogram-bars-legend-max-price-aria-label $1.5K
Displaying fares for August-2026
  • PWM–SAN: cmp-view-offers-disclaimer. Find Offers
    05

    We

    AUG

  • PWM–SAN, 08/06/26 – 08/13/26: From $1,078
    06

    Th

  • PWM–SAN, 08/07/26 – 08/14/26: From $1,082
    07

    Fr

  • PWM–SAN, 08/08/26 – 08/15/26: From $1,023
    08

    Sa

  • PWM–SAN, 08/09/26 – 08/16/26: From $1,513
    09

    Su

  • PWM–SAN, 08/10/26 – 08/17/26: From $1,082
    10

    Mo

  • PWM–SAN, 08/11/26 – 08/18/26: From $987
    11

    Tu

  • PWM–SAN, 08/12/26 – 08/19/26: From $851
    12

    We

  • PWM–SAN, 08/13/26 – 08/20/26: From $867
    13

    Th

  • PWM–SAN, 08/14/26 – 08/21/26: From $867
    14

    Fr

  • PWM–SAN, 08/15/26 – 08/22/26: From $745
    15

    Sa

  • PWM–SAN, 08/16/26 – 08/23/26: From $867
    16

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  • PWM–SAN, 08/17/26 – 08/24/26: From $867
    17

    Mo

  • PWM–SAN, 08/18/26 – 08/25/26: From $841
    18

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  • PWM–SAN, 08/19/26 – 08/26/26: From $493
    19

    We

  • PWM–SAN, 08/20/26 – 08/27/26: From $493
    20

    Th

  • PWM–SAN, 08/21/26 – 08/28/26: From $525
    21

    Fr

  • PWM–SAN, 08/22/26 – 08/29/26: From $493
    22

    Sa

  • PWM–SAN, 08/23/26 – 08/30/26: From $593
    23

    Su

  • PWM–SAN, 08/24/26 – 08/31/26: From $493
    24

    Mo

  • PWM–SAN, 08/25/26 – 09/01/26: From $493
    25

    Tu

  • PWM–SAN, 08/26/26 – 09/02/26: From $369
    26

    We

  • PWM–SAN, 08/27/26 – 09/03/26: From $554
    27

    Th

  • PWM–SAN, 08/28/26 – 09/04/26: From $496
    28

    Fr

  • PWM–SAN, 08/29/26 – 09/05/26: From $351
    29

    Sa

  • PWM–SAN, 08/30/26 – 09/06/26: From $451
    30

    Su

  • PWM–SAN, 08/31/26 – 09/07/26: From $424
    31

    Mo

  • PWM–SAN, 09/01/26 – 09/08/26: From $369
    01

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    SEP

  • PWM–SAN: cmp-view-offers-disclaimer. Find Offers
    02

    We

  • PWM–SAN, 09/03/26 – 09/09/26: From $356
    03

    Th

  • PWM–SAN: cmp-view-offers-disclaimer. Find Offers
    04

    Fr

    • range$351-$1,513

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

    Find deals on Portland, ME to San Diego flights

    $
    keyboard_arrow_down

    Portland, ME (PWM)to

    San Diego (SAN)
    09/05/26 - 09/12/26

    Round trip

    Economy

    from
    $338Fare subject to changes
    Updated: 11 hours ago

    Portland, ME (PWM)to

    San Diego (SAN)
    08/29/26 - 09/05/26

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 11 hours ago

    Portland, ME (PWM)to

    San Diego (SAN)
    09/08/26 - 09/11/26

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 14 hours ago

    Portland, ME (PWM)to

    San Diego (SAN)
    09/12/26 - 09/19/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 11 hours ago

    Portland, ME (PWM)to

    San Diego (SAN)
    09/09/26 - 09/16/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 11 hours ago

    Portland, ME (PWM)to

    San Diego (SAN)
    09/03/26 - 09/09/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 14 hours ago

    Portland, ME (PWM)to

    San Diego (SAN)
    10/15/26 - 10/22/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 11 hours ago

    Portland, ME (PWM)to

    San Diego (SAN)
    10/21/26 - 10/28/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 11 hours ago

    *Fares displayed have been collected within the last 24hrs and may no longer be available at time of booking. Some fares listed may include one or more connections that are Basic Economy, which class is subject to additional terms and conditions. Modifying this information may result in a different fare. To find the most updated fare, please visit aa.com. Additional baggage fees and charges for optional products and services may apply.

    Finding cheap flights from Portland, ME to San Diego

    Looking for lower fares on your trip from Portland, ME to San Diego? Here are a few ways to save.

    • Book early: Booking 1 to 3 months ahead can help you find lower fares
    • Be flexible with dates: Midweek travel, like Tuesdays and Wednesdays, can be more affordable
    • Travel during less busy periods: Flying outside peak travel times can help find lower fares and avoid crowds

    Earn up to $500 back on your next American Airlines flight plus, 30,000 bonus miles. Offers vary elsewhere. Opens another site in a new window that may not meet accessibility guidelines.

    Upgrade your flight with Main Cabin Extra

    Make your trip more comfortable with Main Cabin Extra. Enjoy benefits like:

    • Extra legroom: More space with seats at the front of the Main Cabin or in exit rows.
    • Early boarding: Preferred Group 5 boarding allows easier access to overhead bins.
    • Complimentary drinks: Enjoy beer, wine and spirits on flights with full beverage service.

    Discover how Main Cabin Extra can enhance your trip.

    American Airlines flights from Portland, ME to San Diego