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Flights from Ottawa to St. Louis
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Flights from Ottawa to St. Louis Starting at MYR 727

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip
      • YOW16:05
        16h 36m
        1 stop
        STL07:41
        Sun, Nov 24|Ottawa - St. Louis|Porter Airlines
        MYR 727MYR 1,771
        59% OFF
        59% OFF
        MYR 1,771MYR 727

        Choose Porter Airlines flights from Ottawa to St. Louis. The one-way connecting flight with Porter Airlines departs from Ottawa Macdonald-Cartier International Airport on Sun, Nov 24, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 727 including taxes and charges.

      • YOW09:20
        15h 8m
        1 stop
        STL23:28
        Tue, Dec 17|Ottawa - St. Louis|Porter Airlines
        MYR 735MYR 1,771
        57% OFF
        57% OFF
        MYR 1,771MYR 735

        Choose Porter Airlines flights from Ottawa to St. Louis. The one-way connecting flight with Porter Airlines departs from Ottawa Macdonald-Cartier International Airport on Tue, Dec 17, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 735 including taxes and charges.

      • YOW16:05
        16h 36m
        1 stop
        STL07:41
        Fri, Nov 22|Ottawa - St. Louis|Porter Airlines
        MYR 784MYR 1,771
        56% OFF
        56% OFF
        MYR 1,771MYR 784

        Choose Porter Airlines flights from Ottawa to St. Louis. The one-way connecting flight with Porter Airlines departs from Ottawa Macdonald-Cartier International Airport on Fri, Nov 22, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 784 including taxes and charges.

      • YOW14:05
        7h
        1 stop
        STL20:05
        Sat, Nov 23|Ottawa - St. Louis|United Airlines
        MYR 1,424
        MYR 1,424

        Choose United Airlines flights from Ottawa to St. Louis. The one-way connecting flight with United Airlines departs from Ottawa Macdonald-Cartier International Airport on Sat, Nov 23, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 1,424 including taxes and charges.

      • YOW06:00
        10h 19m
        1 stop
        STL15:19
        Fri, Nov 22|Ottawa - St. Louis|United Airlines
        MYR 1,432
        MYR 1,432

        Choose United Airlines flights from Ottawa to St. Louis. The one-way connecting flight with United Airlines departs from Ottawa Macdonald-Cartier International Airport on Fri, Nov 22, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 1,432 including taxes and charges.

      • YOW14:05
        7h
        1 stop
        STL20:05
        Tue, Nov 26|Ottawa - St. Louis|United Airlines
        MYR 1,438
        MYR 1,438

        Choose United Airlines flights from Ottawa to St. Louis. The one-way connecting flight with United Airlines departs from Ottawa Macdonald-Cartier International Airport on Tue, Nov 26, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 1,438 including taxes and charges.

      • YOW10:05
        6h 1m
        1 stop
        STL15:06
        Wed, Dec 25|Ottawa - St. Louis|Air Canada
        MYR 1,446
        MYR 1,446

        Choose Air Canada flights from Ottawa to St. Louis. The one-way connecting flight with Air Canada departs from Ottawa Macdonald-Cartier International Airport on Wed, Dec 25, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 1,446 including taxes and charges.

      • YOW06:20
        9h 4m
        1 stop
        STL14:24
        Mon, Dec 23|Ottawa - St. Louis|United Airlines
        MYR 1,465
        MYR 1,465

        Choose United Airlines flights from Ottawa to St. Louis. The one-way connecting flight with United Airlines departs from Ottawa Macdonald-Cartier International Airport on Mon, Dec 23, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 1,465 including taxes and charges.

      • YOW10:00
        10h 26m
        1 stop
        STL19:26
        Fri, Dec 13|Ottawa - St. Louis|Air Transat
        MYR 1,467
        MYR 1,467

        Choose Air Transat flights from Ottawa to St. Louis. The one-way connecting flight with Air Transat departs from Ottawa Macdonald-Cartier International Airport on Fri, Dec 13, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 1,467 including taxes and charges.

      • YOW10:05
        6h 1m
        1 stop
        STL15:06
        Mon, Dec 23|Ottawa - St. Louis|Air Canada
        MYR 1,489
        MYR 1,489

        Choose Air Canada flights from Ottawa to St. Louis. The one-way connecting flight with Air Canada departs from Ottawa Macdonald-Cartier International Airport on Mon, Dec 23, arriving at St. Louis Lambert International Airport. One-way Prices start from MYR 1,489 including taxes and charges.

      • YOW13:00
        3h 5m
        Nonstop
        STL14:00
        Fri, Nov 29|Ottawa - St. Louis|Porter Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

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Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Airlines Flying from Ottawa to St. Louis

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Porter Airlines
From MYR 727
WestJet
From MYR 1,396
United Airlines
From MYR 1,424
Air Canada
From MYR 1,446
Air Transat
From MYR 1,467
Delta Air Lines
From MYR 1,647

Find more flights and airlines

Alternative Routes from Ottawa to St. Louis

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Ottawa to St. Louis.

  • Cheapest
    Porter Airlines
    YOW
    16:05
    16h 36m
    1 transfer
    STL
    07:41
    Ottawa Macdonald-Cartier International Airport - St. Louis Lambert International Airport
    Sun, Nov 24Porter Airlines
    MYR 727
  • Porter Airlines
    YOW
    16:05
    16h 36m
    1 transfer
    STL
    07:41
    Ottawa Macdonald-Cartier International Airport - St. Louis Lambert International Airport
    Sun, Nov 24Porter Airlines
    MYR 727
    Find More Flights

FAQ

  • When are flight tickets from Ottawa (YOW) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Ottawa to St. Louis based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Ottawa (YOW) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around MYR 1,965.

  • What is the transportation method from the main airport to downtown in St. Louis?

    • The distance from St. Louis Lambert International Airport to downtown is about 20 km. It takes about 40 minutes by taxi.

How to find a cheap flight from Ottawa to St. Louis

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Ottawa to St. Louis. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Information from Ottawa to St. Louis

Cheapest nonstop flight priceMYR 726
Off-season for travelNovember
Peak season for travelJanuary
Flight distance1,409.41 km
Popular airlineUnited Airlines

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