American Airlines flights from Portland, OR to London

Recent searches for flights from Portland, OR to London

Sep 2026
From$993*
Updated: 8 hours ago
Round tripIEconomy
Oct 2026
From$983*
Updated: 8 hours ago
Round tripIEconomy
Nov 2026
From$953*
Updated: 8 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $993
cmp-daily-histogram-bars-legend-max-price-aria-label $1.5K
Displaying fares for September-2026
  • PDX–LON: cmp-view-offers-disclaimer. Find Offers
    01

    Tu

    SEP

  • PDX–LON, 09/02/26 – 09/09/26: From $1,418
    02

    We

  • PDX–LON, 09/03/26 – 09/10/26: From $1,478
    03

    Th

  • PDX–LON, 09/04/26 – 09/11/26: From $1,355
    04

    Fr

  • PDX–LHR, 09/05/26 – 09/12/26: From $1,308
    05

    Sa

  • PDX–LON, 09/06/26 – 09/13/26: From $1,351
    06

    Su

  • PDX–LHR, 09/07/26 – 09/14/26: From $1,193
    07

    Mo

  • PDX–LON, 09/08/26 – 09/15/26: From $1,143
    08

    Tu

  • PDX–LHR, 09/09/26 – 09/16/26: From $1,143
    09

    We

  • PDX–LHR, 09/10/26 – 09/17/26: From $1,193
    10

    Th

  • PDX–LHR, 09/11/26 – 09/18/26: From $1,189
    11

    Fr

  • PDX–LHR, 09/12/26 – 09/19/26: From $1,239
    12

    Sa

  • PDX–LHR, 09/13/26 – 09/20/26: From $1,474
    13

    Su

  • PDX–LHR, 09/14/26 – 09/21/26: From $1,189
    14

    Mo

  • PDX–LON, 09/15/26 – 09/22/26: From $1,143
    15

    Tu

  • PDX–LHR, 09/16/26 – 09/23/26: From $1,143
    16

    We

  • PDX–LON, 09/17/26 – 09/24/26: From $1,193
    17

    Th

  • PDX–LHR, 09/18/26 – 09/25/26: From $1,193
    18

    Fr

  • PDX–LON, 09/19/26 – 09/26/26: From $1,304
    19

    Sa

  • PDX–LHR, 09/20/26 – 09/27/26: From $1,189
    20

    Su

  • PDX–LHR, 09/21/26 – 09/28/26: From $1,189
    21

    Mo

  • PDX–LHR, 09/22/26 – 09/29/26: From $1,139
    22

    Tu

  • PDX–LHR, 09/23/26 – 09/30/26: From $1,143
    23

    We

  • PDX–LHR, 09/24/26 – 10/01/26: From $1,189
    24

    Th

  • PDX–LON, 09/25/26 – 10/02/26: From $1,189
    25

    Fr

  • PDX–LON, 09/26/26 – 10/03/26: From $1,239
    26

    Sa

  • PDX–LON, 09/27/26 – 10/04/26: From $1,189
    27

    Su

  • PDX–LHR, 09/28/26 – 10/16/26: From $993
    28

    Mo

  • PDX–LHR, 09/29/26 – 10/06/26: From $993
    29

    Tu

  • PDX–LHR, 09/30/26 – 10/07/26: From $993
    30

    We

    • range$993-$1,478

    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, OR to London flights

    $
    keyboard_arrow_down

    Portland, OR (PDX)to

    London (LON)
    12/02/26 - 12/09/26

    Round trip

    Economy

    from
    $903Fare subject to changes
    Updated: 34 minutes ago

    Portland, OR (PDX)to

    London (LON)
    12/09/26 - 12/16/26

    Round trip

    Economy

    from
    $917Fare subject to changes
    Updated: 34 minutes ago

    Portland, OR (PDX)to

    London (LON)
    12/01/26 - 12/08/26

    Round trip

    Economy

    from
    $917Fare subject to changes
    Updated: 34 minutes ago

    Portland, OR (PDX)to

    London (LON)
    12/08/26 - 12/15/26

    Round trip

    Economy

    from
    $917Fare subject to changes
    Updated: 34 minutes ago

    Portland, OR (PDX)to

    London (LON)
    04/04/27 - 04/09/27

    Round trip

    Economy

    from
    $926Fare subject to changes
    Updated: 4 hours ago

    Portland, OR (PDX)to

    London (LON)
    11/30/26 - 12/07/26

    Round trip

    Economy

    from
    $953Fare subject to changes
    Updated: 34 minutes ago

    Portland, OR (PDX)to

    London (LON)
    12/04/26 - 12/11/26

    Round trip

    Economy

    from
    $963Fare subject to changes
    Updated: 34 minutes ago

    Portland, OR (PDX)to

    London (LON)
    12/07/26 - 12/14/26

    Round trip

    Economy

    from
    $963Fare subject to changes
    Updated: 34 minutes 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, OR to London

    Looking for lower fares on your trip from Portland, OR to London? 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, OR to London