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Cheap Flights from Ottawa to St. Louis starting at S$ 206

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

  • One way
  • Round-trip

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

Cheapest time to fly from Ottawa to St. Louis

We monitor flight fares to help you find the best deals effortlessly

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

Westjet
From S$ 206
Porter Airlines
From S$ 268
Flair Airlines
From S$ 299
United Airlines
From S$ 334
Delta Air Lines
From S$ 462
ANA airlines

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
    Westjet
    YOW
    17:10
    15h 3m
    1 transfer
    STL
    07:13
    Ottawa Macdonald-Cartier International Airport - St. Louis Lambert International Airport
    Mon, Apr 15Westjet
    S$ 206
  • Westjet
    YOW
    17:10
    15h 3m
    1 transfer
    STL
    07:13
    Ottawa Macdonald-Cartier International Airport - St. Louis Lambert International Airport
    Mon, Apr 15Westjet
    S$ 206
    Find More Flights

Frequently Asked Questions

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

    Airlines adjust prices for flights from Ottawa to St. Louis based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much is a flight from Ottawa (YOW) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around S$ 617.
  • 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 20km, by taxi about 40 minutes.
  • How many airports in St. Louis?

Find cheapest flight ticket from Ottawa to St. Louis

Cheapest direct flight price

S$ 205

Cheapest month

November

Peak season for travel

October