CA $431 Cheap Flights from St. Louis (STL) to Ottawa (YOW)

You can find cheap one-way flights from CA $431 and cheap return flights CA $964 STL to YOW with Expedia. One-way flights typically cost between CA$207 and CA$1386, and return flights often range between CA$724 and CA$2512. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when STL to YOW ticket fares go up or down.

If you're looking for the cheapest time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.), February is typically your best bet. You can expect average return fares around CA$636 during this month. Other budget-friendly months to consider for this route include January and December.

Enter STL to YOW and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

Air Canada is one of the cheapest airlines offering connecting flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.), with return tickets starting from around CA$450 for flights that can be booked for departure within the next year, typically with a layover in Pearson Intl. (YYZ). These prices are for one adult in economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.

To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

There are approximately 43 connecting flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.). Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and LaGuardia (LGA).

The earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) typically departs around 5:00 AM local time. This flight is operated by United and Air Canada. This is a seasonal service active in October. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

You'll typically find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) on a Wednesday, with around 50 flights available. This gives you plenty of options for your travel plans. Wednesday offers notably more flight options compared to other days of the week. Major airlines on this route include Delta, United, and American Airlines.

The most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) are in the morning, from 6am to 9am. Many major carriers, including United, Air Canada and Delta, offer flights during this window. Many travellers prefer these early morning flights as they allow you to arrive at your destination with plenty of time to start your day.

There are no nonstop flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.). For flights with one stop, you can expect the journey to take around 5 hours. Flights with two or more stops typically take longer, averaging about 14 hours. The total distance covered on this route is approximately 1,415 kilometres. Keep in mind that actual flight times can vary due to factors like layover duration, weather, and wind patterns.

You can fly business class or first class between STL and YOW. You can fly business class with Air Canada and United.

First class cabins are available on United.

It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you're planning to travel to Ottawa from Lambert-St. Louis Intl. (STL), you can fly directly into Macdonald-Cartier Intl. (YOW) which offers international flights and connections. Some flights may connect through major hubs like O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), or LaGuardia (LGA) before reaching Ottawa. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.