American Airlines flights from Ontario to London

Recent searches for flights from Ontario to London

Aug 2026
From$1,093*
Updated: 48 minutes ago
Round tripIEconomy
Sep 2026
From$938*
Updated: 48 minutes ago
Round tripIEconomy
Oct 2026
From$938*
Updated: 6 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $938
cmp-daily-histogram-bars-legend-max-price-aria-label $1.5K
Displaying fares for August-2026
  • ONT–LON, 08/26/26 – 09/02/26: From $1,093
    26

    We

    AUG

  • ONT–LON, 08/27/26 – 09/03/26: From $1,143
    27

    Th

  • ONT–LON, 08/28/26 – 09/04/26: From $1,176
    28

    Fr

  • ONT–LHR, 08/29/26 – 09/05/26: From $1,226
    29

    Sa

  • ONT–LHR, 08/30/26 – 09/06/26: From $1,166
    30

    Su

  • ONT–LON, 08/31/26 – 09/07/26: From $1,166
    31

    Mo

  • ONT–LHR, 09/01/26 – 09/08/26: From $1,093
    01

    Tu

    SEP

  • ONT–LHR, 09/02/26 – 09/09/26: From $1,224
    02

    We

  • ONT–LON, 09/03/26 – 09/10/26: From $1,488
    03

    Th

  • ONT–LHR, 09/04/26 – 09/11/26: From $1,370
    04

    Fr

  • ONT–LHR, 09/05/26 – 09/12/26: From $1,420
    05

    Sa

  • ONT–LHR, 09/06/26 – 09/13/26: From $1,488
    06

    Su

  • ONT–LHR, 09/07/26 – 09/14/26: From $1,143
    07

    Mo

  • ONT–LHR, 09/08/26 – 09/15/26: From $1,093
    08

    Tu

  • ONT–LON, 09/09/26 – 09/16/26: From $1,093
    09

    We

  • ONT–LON, 09/10/26 – 09/17/26: From $1,143
    10

    Th

  • ONT–LHR, 09/11/26 – 09/18/26: From $1,143
    11

    Fr

  • ONT–LHR, 09/12/26 – 09/19/26: From $1,193
    12

    Sa

  • ONT–LCY, 09/13/26 – 09/20/26: From $1,476
    13

    Su

  • ONT–LON, 09/14/26 – 09/21/26: From $1,143
    14

    Mo

  • ONT–LON, 09/15/26 – 09/22/26: From $1,093
    15

    Tu

  • ONT–LON, 09/16/26 – 09/23/26: From $1,093
    16

    We

  • ONT–LHR, 09/17/26 – 09/24/26: From $1,143
    17

    Th

  • ONT–LON, 09/18/26 – 09/25/26: From $1,143
    18

    Fr

  • ONT–LHR, 09/19/26 – 09/26/26: From $1,250
    19

    Sa

  • ONT–LHR, 09/20/26 – 09/27/26: From $1,143
    20

    Su

  • ONT–LHR, 09/21/26 – 09/28/26: From $1,143
    21

    Mo

  • ONT–LON, 09/22/26 – 09/29/26: From $938
    22

    Tu

  • ONT–LON, 09/23/26 – 09/30/26: From $938
    23

    We

  • ONT–LHR, 09/24/26 – 10/01/26: From $988
    24

    Th

  • ONT–LON, 09/25/26 – 10/02/26: From $988
    25

    Fr

    • range$938-$1,488

    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 Ontario to London flights

    $
    keyboard_arrow_down

    Ontario (ONT)to

    London (LON)
    02/27/27 - 03/09/27

    Round trip

    Economy

    from
    $873Fare subject to changes
    Updated: 23 hours ago

    Ontario (ONT)to

    London (LON)
    03/03/27 - 03/10/27

    Round trip

    Economy

    from
    $874Fare subject to changes
    Updated: 1 hour ago

    Ontario (ONT)to

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

    Round trip

    Economy

    from
    $899Fare subject to changes
    Updated: 48 minutes ago

    Ontario (ONT)to

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

    Round trip

    Economy

    from
    $899Fare subject to changes
    Updated: 48 minutes ago

    Ontario (ONT)to

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

    Round trip

    Economy

    from
    $899Fare subject to changes
    Updated: 48 minutes ago

    Ontario (ONT)to

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

    Round trip

    Economy

    from
    $899Fare subject to changes
    Updated: 48 minutes ago

    Ontario (ONT)to

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

    Round trip

    Economy

    from
    $929Fare subject to changes
    Updated: 48 minutes ago

    Ontario (ONT)to

    London (LON)
    11/24/26 - 12/01/26

    Round trip

    Economy

    from
    $929Fare subject to changes
    Updated: 48 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 Ontario to London

    Looking for lower fares on your trip from Ontario 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 Ontario to London