CA $380 Cheap Flights from Ottawa (YOW) to St. Louis (STL)

Popular airlines from Ottawa International Airport (YOW) to Lambert-St. Louis International Airport (STL)

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Cheap flights from Ottawa (YOW) to St. Louis (STL)

Prices were available within the past 7 days and start at CA $380 for one-way flights and CA $678 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Air Canada
Air Canada
United
Air Canada
United
United
Air Canada
Delta
WestJet

Find the cheapest month to fly from Ottawa (YOW) to St. Louis (STL)

August is typically the cheapest month to fly

From CA $669 - CA $1,227 per traveller.

Graph displaying average flight prices per month

Flight from Ottawa to St. Louis (YOW - STL) route information
Origin airport
Macdonald-Cartier Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada, United, WestJet
Roundtrip price
CA $677
Distance
1405 km

Ottawa to St. Louis Flights

The easy way to book your flights from Ottawa to St. Louis 

With Expedia, it’s simple to find and book flights to St. Louis from Ottawa whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Lambert-St. Louis Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Ottawa to St. Louis today, tomorrow, or this week.  

 

Save dollars with cheap flights from Macdonald-Cartier Intl., YOW to Lambert-St. Louis Intl., STL 

Sort your search results by price to find great deals on your flight from Ottawa to St. Louis—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to St. Louis from Ottawa currently is just CA $678 rising to CA $1,059.  

Here are more money-saving tips: 

  • Fly in September when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to St. Louis  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to St. Louis from Ottawa 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to St. Louis with Expedia today.

Frequently asked questions

How much is a flight from YOW to Lambert-St. Louis Intl. Airport (STL)?
The lowest price advertised for a round-trip flight from YOW to Lambert Field is CA $678. But you better get moving. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Macdonald-Cartier Intl. Airport (YOW) to Lambert Field?
This varies between air carriers, as each has its own terms and conditions. Visit the Customer Service Portal, where there are simple instructions on how to cancel online.
How do I find cheap flights from Macdonald-Cartier Intl. Airport (YOW) to Lambert Field that have flexible change policies?
Plenty of airlines will allow you to move your flight without a change fee. All you pay is any additional cost for the new flight. When looking for Ottawa Intl. Airport to Lambert Field flights, you'll see a "No change fees" box for you to tick.
How many hours is the flight from Macdonald-Cartier Intl. Airport (YOW) to STL?
The flight time from Ottawa International Airport to Lambert-St. Louis Intl. Airport (STL) is approximately 4 hours and 16 minutes. Put your earphones in, listen to your favourite tunes and the hours will whiz by.
How far is the flight from Macdonald-Cartier Intl. Airport (YOW) to STL?
It's just 1,400 kilometres from Ottawa International Airport to Lambert-St. Louis Intl. Airport (STL). Chances are you'll spend more time getting to and from the airport than actually flying!
Which airlines fly direct from Ottawa International Airport to STL?
If you want to travel straight from YOW to Lambert Field, you'll have to book a flight with one or more stops. Unfortunately, there aren't any airlines that fly directly between these airports.
Are Macdonald-Cartier Intl. Airport (YOW) to Lambert Field flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes score a bargain, with some super cheap airfares from Ottawa International Airport to Lambert Field emerging a few weeks prior to the departure date. If you'd rather book ahead, Expedia compares and updates the best flight deals continually --- as early as a year in advance in some cases. It does depend on the carrier though, as not all airlines release prices so far in advance.

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