Travel with Air Canada from Ottawa, ON to St. Louis, MO (YOW - STL) from CAD 424*

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*Fares displayed have been collected within the last 48 hours and may no longer be available at the time of booking. Learn more about this offer. Additional baggage fees and charges for optional products and services may apply.

Flights between Ottawa, ON and St. Louis, MO - our lowest fares in cash

Aug 2026
FromCAD 672*
One way/Economy
Sep 2026
FromCAD 424*
One way/Economy
Oct 2026
FromCAD 424*
One way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label CAD 424
cmp-daily-histogram-bars-legend-max-price-aria-label CAD 675
Displaying fares for August-2026
  • YOW–STL, Aug 26, 2026: From CAD 672
    26

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    AUG

  • YOW–STL, Aug 27, 2026: From CAD 675
    27

    Th

  • YOW–STL, Aug 28, 2026: From CAD 672
    28

    Fr

  • YOW–STL, Aug 29, 2026: From CAD 675
    29

    Sa

  • YOW–STL, Aug 30, 2026: From CAD 675
    30

    Su

  • YOW–STL, Aug 31, 2026: From CAD 672
    31

    Mo

  • YOW–STL, Sep 01, 2026: From CAD 672
    01

    Tu

    SEP

  • YOW–STL, Sep 02, 2026: From CAD 592
    02

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  • YOW–STL, Sep 03, 2026: From CAD 592
    03

    Th

  • YOW–STL, Sep 04, 2026: From CAD 592
    04

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  • YOW–STL, Sep 05, 2026: From CAD 592
    05

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  • YOW–STL, Sep 06, 2026: From CAD 592
    06

    Su

  • YOW–STL, Sep 07, 2026: From CAD 595
    07

    Mo

  • YOW–STL, Sep 08, 2026: From CAD 592
    08

    Tu

  • YOW–STL, Sep 09, 2026: From CAD 491
    09

    We

  • YOW–STL, Sep 10, 2026: From CAD 491
    10

    Th

  • YOW–STL, Sep 11, 2026: From CAD 491
    11

    Fr

  • YOW–STL, Sep 12, 2026: From CAD 498
    12

    Sa

  • YOW–STL, Sep 13, 2026: From CAD 536
    13

    Su

  • YOW–STL, Sep 14, 2026: From CAD 536
    14

    Mo

  • YOW–STL, Sep 15, 2026: From CAD 498
    15

    Tu

  • YOW–STL, Sep 16, 2026: From CAD 424
    16

    We

  • YOW–STL, Sep 17, 2026: From CAD 431
    17

    Th

  • YOW–STL, Sep 18, 2026: From CAD 431
    18

    Fr

  • YOW–STL, Sep 19, 2026: From CAD 424
    19

    Sa

  • YOW–STL, Sep 20, 2026: From CAD 431
    20

    Su

  • YOW–STL, Sep 21, 2026: From CAD 469
    21

    Mo

  • YOW–STL, Sep 22, 2026: From CAD 431
    22

    Tu

  • YOW–STL, Sep 23, 2026: From CAD 424
    23

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  • YOW–STL, Sep 24, 2026: From CAD 424
    24

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  • YOW–STL, Sep 25, 2026: From CAD 431
    25

    Fr

    • RangeCAD 424-CAD 675

    *Fares displayed have been collected within the last 48 hours and may no longer be available at the time of booking. Learn more about this offer. Additional baggage fees and charges for optional products and services may apply.

    Book flights from Ottawa, ON (YOW) to St. Louis, MO (STL) | Air Canada

    Flights between Ottawa, ON and St. Louis, MO - our lowest fares in points

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    Flights between Ottawa, ON and St. Louis, MO - our lowest fares in points
    From
    To
    Fare Type
    Departure
    Price
    Ottawa, ON (YOW)St. Louis, MO (STL)One-way
    /
    Economy    		 Nov 28, 2026

    From

    40,000 pts
    + CAD 682

    Viewed: 17 hours ago

    Ottawa, ON (YOW)St. Louis, MO (STL)One-way
    /
    Economy    		 Nov 29, 2026

    From

    125,200 pts
    + CAD 743

    Viewed: 17 hours ago

    *Points displayed do not reflect preferred pricing for Aeroplan Elite Status Members and/or Aeroplan Credit Cardholders. Prices have been collected within the past 48 hrs and may no longer be available at time of booking. Learn more about this offer. Additional baggage fees and charges for optional products and services may apply.

    Explore all routes from Ottawa, ON to St. Louis, MO