American Airlines flights from Saint Louis to London

Recent searches for flights from Saint Louis to London

Sep 2026
From$1,013*
Updated: 9 hours ago
Round tripIEconomy
Oct 2026
From$1,013*
Updated: 9 hours ago
Round tripIEconomy
Nov 2026
From$997*
Updated: 8 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $1.0K
cmp-daily-histogram-bars-legend-max-price-aria-label $1.5K
Displaying fares for September-2026
  • STL–LCY, 09/01/26 – 09/08/26: From $1,413
    01

    Tu

    SEP

  • STL–LHR, 09/02/26 – 09/09/26: From $1,229
    02

    We

  • STL–LON, 09/03/26 – 09/10/26: From $1,477
    03

    Th

  • STL–LHR, 09/04/26 – 09/11/26: From $1,376
    04

    Fr

  • STL–LON, 09/05/26 – 09/12/26: From $1,343
    05

    Sa

  • STL–LON, 09/06/26 – 09/13/26: From $1,477
    06

    Su

  • STL–LON, 09/07/26 – 09/15/26: From $1,127
    07

    Mo

  • STL–LON, 09/08/26 – 09/15/26: From $1,123
    08

    Tu

  • STL–LHR, 09/09/26 – 09/16/26: From $1,117
    09

    We

  • STL–LHR, 09/10/26 – 09/17/26: From $1,177
    10

    Th

  • STL–LON, 09/11/26 – 09/18/26: From $1,177
    11

    Fr

  • STL–LON, 09/12/26 – 09/19/26: From $1,227
    12

    Sa

  • STL–LHR, 09/13/26 – 09/20/26: From $1,372
    13

    Su

  • STL–LHR, 09/14/26 – 09/25/26: From $1,127
    14

    Mo

  • STL–LHR, 09/15/26 – 09/22/26: From $1,127
    15

    Tu

  • STL–LON, 09/16/26 – 09/23/26: From $1,127
    16

    We

  • STL–LON, 09/17/26 – 09/24/26: From $1,177
    17

    Th

  • STL–LHR, 09/18/26 – 09/25/26: From $1,177
    18

    Fr

  • STL–LON, 09/19/26 – 09/26/26: From $1,227
    19

    Sa

  • STL–LON, 09/20/26 – 09/27/26: From $1,173
    20

    Su

  • STL–LON, 09/21/26 – 09/28/26: From $1,177
    21

    Mo

  • STL–LON, 09/22/26 – 09/29/26: From $1,123
    22

    Tu

  • STL–LHR, 09/23/26 – 09/30/26: From $1,123
    23

    We

  • STL–LHR, 09/24/26 – 10/01/26: From $1,177
    24

    Th

  • STL–LHR, 09/25/26 – 10/02/26: From $1,173
    25

    Fr

  • STL–LON, 09/26/26 – 10/03/26: From $1,227
    26

    Sa

  • STL–LHR, 09/27/26 – 10/04/26: From $1,173
    27

    Su

  • STL–LON, 09/28/26 – 10/05/26: From $1,177
    28

    Mo

  • STL–LHR, 09/29/26 – 10/06/26: From $1,013
    29

    Tu

  • STL–LON, 09/30/26 – 10/07/26: From $1,017
    30

    We

    • range$1,013-$1,477

    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 Saint Louis to London flights

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    Saint Louis (STL)to

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

    Round trip

    Economy

    from
    $947Fare subject to changes
    Updated: 8 hours ago

    Saint Louis (STL)to

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

    Round trip

    Economy

    from
    $947Fare subject to changes
    Updated: 8 hours ago

    Saint Louis (STL)to

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

    Round trip

    Economy

    from
    $947Fare subject to changes
    Updated: 8 hours ago

    Saint Louis (STL)to

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

    Round trip

    Economy

    from
    $947Fare subject to changes
    Updated: 8 hours ago

    Saint Louis (STL)to

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

    Round trip

    Economy

    from
    $997Fare subject to changes
    Updated: 8 hours ago

    Saint Louis (STL)to

    London (LON)
    12/06/26 - 12/13/26

    Round trip

    Economy

    from
    $997Fare subject to changes
    Updated: 8 hours ago

    Saint Louis (STL)to

    London (LON)
    12/10/26 - 12/17/26

    Round trip

    Economy

    from
    $997Fare subject to changes
    Updated: 8 hours ago

    Saint Louis (STL)to

    London (LON)
    12/15/26 - 12/22/26

    Round trip

    Economy

    from
    $997Fare subject to changes
    Updated: 8 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 Saint Louis to London

    Looking for lower fares on your trip from Saint Louis 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 Saint Louis to London