Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Ottawa to St. Louis from $368

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to St. Louis departing on 12/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Deals available from 900+ travel sites.

"This year, momondo is the #1 place for airfares on the internet."
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

Find the cheapest flights from Ottawa to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from Ottawa to St. Louis that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Ottawa to St. Louis.

Cheap last minute flights

Planning a quick getaway from Ottawa to St. Louis? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to St. Louis, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Ottawa to St. Louis

Find recent round-trip train or bus tickets from Ottawa to St. Louis.

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
4:05 pm - 4:26 pmYOW-STL
25h 21m1 stop
5:02 pm - 5:24 pmSTL-YOW
23h 22m1 stop
Mon, Dec 2 - Mon, Dec 9
4:05 pm - 4:26 pmYOW-STL
25h 21m1 stop
5:02 pm - 5:24 pmSTL-YOW
23h 22m1 stop
Mon, Dec 2 - Mon, Dec 9
5:55 am - 4:26 pmYOW-STL
35h 31m2 stops
5:02 pm - 5:24 pmSTL-YOW
23h 22m1 stop
Mon, Dec 2 - Mon, Dec 9
4:05 pm - 4:26 pmYOW-STL
25h 21m2 stops
12:15 pm - 9:20 amSTL-YOW
20h 05m3 stops
Mon, Dec 2 - Mon, Dec 9
4:20 pm - 4:25 pmYOW-STL
25h 05m3 stops
12:15 pm - 9:20 amSTL-YOW
20h 05m3 stops
Mon, Dec 2 - Mon, Dec 9
4:05 pm - 11:28 pmYOW-STL
8h 23m1 stop
3:53 pm - 8:12 pmSTL-YOW
27h 19m1 stop
Thu, Jan 2 - Sun, Jan 5
8:10 pm - 12:04 pmYOW-STL
16h 54m2 stops
4:11 pm - 8:50 pmSTL-YOW
27h 39m2 stops
$643WestJet
Find Deal
Mon, Dec 2 - Mon, Dec 9
8:10 pm - 12:04 pmYOW-STL
16h 54m2 stops
4:11 pm - 7:23 pmSTL-YOW
26h 12m2 stops
$676WestJet
Find Deal
Mon, Dec 2 - Mon, Dec 9
7:30 pm - 12:19 pmYOW-STL
17h 49m2 stops
11:20 am - 9:24 pmSTL-YOW
9h 04m1 stop
$699United Airlines
Find Deal
Mon, Dec 2 - Mon, Dec 9
6:20 am - 12:26 pmYOW-STL
7h 06m1 stop
3:50 pm - 7:37 amSTL-YOW
14h 47m1 stop
$871Air Canada
Find Deal
Sun, Jan 5 - Sun, Jan 5
YOW-STL
878 mimulti-stop
Multiple Airlines
Find Deal

WestJet flights from Ottawa to St. Louis

Our best WestJet deals on Ottawa to St. Louis flight tickets
WestJet
Dec 2
YOW8:10 pmOttawa
16h 54m
2 stops
STL12:04 pmLambert-St Louis
Dec 9
STL4:11 pmLambert-St Louis
27h 39m
2 stops
YOW8:50 pmOttawa
WestJet
Dec 2
YOW8:10 pmOttawa
16h 54m
2 stops
STL12:04 pmLambert-St Louis
Dec 9
STL4:11 pmLambert-St Louis
26h 12m
2 stops
YOW7:23 pmOttawa
WestJet
Jan 2
YOW5:55 amOttawa
31h 05m
2 stops
STL12:00 pmLambert-St Louis
Jan 5
STL6:40 pmLambert-St Louis
25h 10m
2 stops
YOW8:50 pmOttawa

How to get the cheapest flight ticket from Ottawa to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

December. The cheapest time of year to fly to St. Louis from Ottawa is December. Most expensive is January

What is the cheapest day to depart Ottawa for St. Louis?

Wednesday. The cheapest day of the week is typically Wednesday. The most expensive is typically Monday

When is the cheapest time to fly from Ottawa to St. Louis?

Ottawa to St. Louis flights are currently only available in the morning

What is the cheapest airline that flies to St. Louis from Ottawa?

Air Canada. Air Canada and United Airlines are the most popular carriers operating from Ottawa to St. Louis

What is the cheapest Ottawa to St. Louis flight route?

Ottawa - Lambert-St Louis. Fly from Ottawa to Lambert-St Louis for the best Ottawa - St. Louis flight prices

When to book flights from Ottawa to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Ottawa to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ottawa to St. Louis (YOW to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to St. Louis

Best Price Found

$368

Fastest flight time

7h 06m

Direct flights

None

Airports in St. Louis

1 airport
The best flight deal from Ottawa to St. Louis found on momondo in the last 72 hours is $368
The fastest flight from Ottawa to St. Louis takes 7h 06m
There are no direct flights from Ottawa to St. Louis. Popular non-direct route for this connection is Ottawa Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

  • How far is Ottawa to Lambert-St Louis by plane?

    The straight-line distance from Ottawa to Lambert-St Louis is 877.2 mi. By plane, this route typically takes 7h 06m.

  • When did momondo last update prices for flights from Ottawa Airport to Lambert-St Louis Airport?

    Prices for flights from Ottawa Airport to Lambert-St Louis Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ottawa Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Ottawa Airport to Lambert-St Louis Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ottawa Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ottawa to St. Louis?


Best airlines flying from Ottawa to St. Louis

Compare and see reviews for airlines that fly from Ottawa to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $550Free CancellationRating
7.0
8,123 reviews
Search Air Canada flights
United AirlinesPriceFrom $575Free CancellationRating
7.4
9,226 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to St. Louis?

Finding the right flight to St. Louis from Ottawa is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

Can I find flights from Ottawa to St. Louis with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to St. Louis from Ottawa with this policy.

How can momondo help me find flights from Ottawa to St. Louis?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ottawa to St. Louis.

I’m not ready to book a flight from Ottawa to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Ottawa and alert you when they change.


An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Sat 11/9
Sat 11/16
Email me momondo's favorite deals

Find better results for your trip to the United States