YOW - STL

$228 Find Cheap Flights from Ottawa to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ottawa to St. Louis departing on 7/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to St. Louis, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Ottawa to St. Louis (YOW-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ottawa to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ottawa to St. Louis

Wed, Jul 9 - Wed, Jul 16
United Airlines Logo
5:25 pm - 9:35 pmYOW-STL
5h 10m1 stop
United Airlines Logo
5:00 am - 9:35 pmSTL-YOW
15h 35m1 stop
$584United Airlines
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Fri, Aug 1 - Tue, Aug 5
Air Canada Logo
10:00 am - 3:21 pmYOW-STL
6h 21m1 stop
Air Canada Logo
1:30 pm - 7:05 pmSTL-YOW
4h 35m1 stop
$585Air Canada
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Sat, Jul 26 - Sat, Aug 2
United Airlines Logo
6:33 am - 12:46 pmYOW-STL
7h 13m1 stop
United Airlines Logo
5:00 am - 5:06 pmSTL-YOW
11h 06m1 stop
$610United Airlines
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Fri, Aug 1 - Tue, Aug 5
United Airlines Logo
5:15 am - 3:47 pmYOW-STL
11h 32m2 stops
United Airlines Logo
5:00 am - 9:35 pmSTL-YOW
15h 35m1 stop
$613United Airlines
Find Deal
Fri, Aug 1 - Tue, Aug 5
United Airlines Logo
6:30 am - 12:27 pmYOW-STL
6h 57m2 stops
United Airlines Logo
5:00 am - 5:05 pmSTL-YOW
11h 05m2 stops
$620United Airlines
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Sat, Jul 26 - Sat, Aug 2
United Airlines Logo
10:25 am - 7:31 pmYOW-STL
10h 06m2 stops
United Airlines Logo
5:00 am - 2:27 pmSTL-YOW
8h 27m2 stops
$737United Airlines
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Useful Info

KAYAK's insights & trends for Ottawa to St. Louis flights

Get data-powered insights and trends into flights from Ottawa to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ottawa to St. Louis?

The average price of all round-trip flights from Ottawa to St. Louis clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to St. Louis on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Ottawa to St. Louis. For your return ticket, we recommend flying on a Saturday and avoiding Mondays for the best deals.

What is the cheapest month to fly from Ottawa to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ottawa to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ottawa to St. Louis is September, where tickets cost $569 (return) on average. On the other hand, the most expensive months are August and December, where the average cost of round-trip tickets is $740 and $740 respectively.

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Good to know

Low seasonJune
High seasonMay
Cheapest flight$228
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Ottawa to St. Louis

When to book flights from Ottawa to St. Louis

Are your dates flexible? Find out the best times to travel from Ottawa to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ottawa to St. Louis

  • What is the cheapest flight from Ottawa to St. Louis?

    In the last 3 days, the lowest price for a flight from Ottawa to St. Louis was $228 for a one-way ticket and $584 for a round-trip.

  • Do I need a passport to fly between Ottawa and St. Louis?

    Yes

  • Which airports will I be using when flying from Ottawa to St. Louis?

    Ottawa airport is called Ottawa and the only airport in St. Louis is Lambert-St Louis.

  • Which aircraft models fly most regularly from Ottawa to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ottawa to St. Louis?

    Star Alliance is the only airline alliance operating flights between Ottawa and St. Louis.

  • How does KAYAK find such low prices on flights from Ottawa to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ottawa to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ottawa to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Ottawa is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ottawa to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Ottawa with another airline. Booking your flights between Ottawa and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ottawa to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Ottawa up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Ottawa to St. Louis

Information on your arrival and departure airports

Ottawa (YOW)
St. Louis (STL)

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