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 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.

$296 Cheap Flights from Ottawa to St. Louis in 2025/26

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2:15 pm - 7:27 pmYOW-STL

6h 12m1 stop

6:30 am - 2:27 pmSTL-YOW

6h 57m2 stops

$300United Airlines

Find Deal

Fri, Jan 23 - Sun, Jan 25

2:50 pm - 10:58 pmYOW-STL

9h 08m2 stops

6:30 am - 5:42 pmSTL-YOW

10h 12m2 stops

$353Air Canada

Find Deal

Fri, Jan 23 - Sun, Jan 25

6:00 am - 4:27 pmYOW-STL

11h 27m2 stops

6:35 pm - 2:30 pmSTL-YOW

18h 55m2 stops

$395United Airlines

Find Deal

Sun, Dec 21 - Mon, Jan 5

10:20 am - 3:29 pmYOW-STL

6h 09m1 stop

4:05 pm - 11:08 pmSTL-YOW

6h 03m1 stop

$469Air Canada

Find Deal

Sun, Dec 21 - Mon, Jan 5

9:45 am - 10:43 pmYOW-STL

13h 58m2 stops

8:15 am - 11:54 pmSTL-YOW

14h 39m1 stop

$499United Airlines

Find Deal

Sat, Dec 20 - Mon, Jan 5

6:55 pm - 9:45 amYOW-STL

39h 50m2 stops

10:40 am - 5:13 pmSTL-YOW

29h 33m1 stop

$505Multiple Airlines

Find Deal

Sat, Dec 20 - Mon, Jan 5

7:15 am - 3:29 pmYOW-STL

9h 14m1 stop

4:05 pm - 11:08 pmSTL-YOW

6h 03m1 stop

$542Air Canada

Find Deal

Sat, Dec 20 - Mon, Jan 5

7:15 am - 3:29 pmYOW-STL

9h 14m1 stop

4:05 pm - 11:08 pmSTL-YOW

6h 03m1 stop

$544Air Canada

Find Deal

Sat, Dec 20 - Mon, Jan 5

6:45 am - 7:30 pmYOW-STL

13h 45m3 stops

8:01 pm - 4:51 pmSTL-YOW

19h 50m2 stops

$852American Airlines

Find Deal

Sat, Dec 20 - Mon, Jan 5

12:10 pm - 10:56 amYOW-STL

23h 46m3 stops

9:45 am - 3:04 pmSTL-YOW

28h 19m3 stops

$1,565Multiple Airlines

Find Deal

Sat, Dec 20 - Mon, Jan 5

United Airlines flights from Ottawa to St. Louis

Our best United Airlines deals on Ottawa to St. Louis flight tickets

United Airlines

Jan 23

YOW2:15 pmOttawa

6h 12m

1 stop

STL7:27 pmLambert-St Louis

Jan 25

STL6:30 amLambert-St Louis

6h 57m

2 stops

YOW2:27 pmOttawa

$300

Find similar

United Airlines

Dec 21

YOW6:00 amOttawa

11h 27m

2 stops

STL4:27 pmLambert-St Louis

Jan 5

STL6:35 pmLambert-St Louis

18h 55m

2 stops

YOW2:30 pmOttawa

$395

Find similar

United Airlines

Dec 20

YOW9:45 amOttawa

13h 58m

2 stops

STL10:43 pmLambert-St Louis

Jan 5

STL8:15 amLambert-St Louis

14h 39m

1 stop

YOW11:54 pmOttawa

$499

Find similar

Air Canada flights from Ottawa to St. Louis

Our best Air Canada deals on Ottawa to St. Louis flight tickets

Air Canada

Jan 23

YOW2:50 pmOttawa

9h 08m

2 stops

STL10:58 pmLambert-St Louis

Jan 25

STL6:30 amLambert-St Louis

10h 12m

2 stops

YOW5:42 pmOttawa

$353

Find similar

Air Canada

Dec 21

YOW10:20 amOttawa

6h 09m

1 stop

STL3:29 pmLambert-St Louis

Jan 5

STL4:05 pmLambert-St Louis

6h 03m

1 stop

YOW11:08 pmOttawa

$469

Find similar

Air Canada

Dec 20

YOW7:15 amOttawa

9h 14m

1 stop

STL3:29 pmLambert-St Louis

Jan 5

STL4:05 pmLambert-St Louis

6h 03m

1 stop

YOW11:08 pmOttawa

$542

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/23

2:15 pm-7:27 pm

1 stop6h 12m

Lambert-St Louis

Sun 1/25

6:30 am-2:27 pm

2 stops6h 57m

$300

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/23

2:50 pm-10:58 pm

2 stops9h 08m

Lambert-St Louis

Sun 1/25

6:30 am-5:42 pm

2 stops10h 12m

$353

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sun 12/21

6:00 am-4:27 pm

2 stops11h 27m

Lambert-St Louis

Mon 1/5

6:35 pm-2:30 pm

2 stops18h 55m

$395

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sun 12/21

10:20 am-3:29 pm

1 stop6h 09m

Lambert-St Louis

Mon 1/5

4:05 pm-11:08 pm

1 stop6h 03m

$469

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 12/20

9:45 am-10:43 pm

2 stops13h 58m

Lambert-St Louis

Mon 1/5

8:15 am-11:54 pm

1 stop14h 39m

$499

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 12/20

6:55 pm-9:45 am

2 stops39h 50m

Lambert-St Louis

Mon 1/5

10:40 am-5:13 pm

1 stop29h 33m

$505

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 12/20

7:15 am-3:29 pm

1 stop9h 14m

Lambert-St Louis

Mon 1/5

4:05 pm-11:08 pm

1 stop6h 03m

$542

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 12/20

7:15 am-3:29 pm

1 stop9h 14m

Lambert-St Louis

Mon 1/5

4:05 pm-11:08 pm

1 stop6h 03m

$544

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 12/20

6:45 am-7:30 pm

3 stops13h 45m

Lambert-St Louis

Mon 1/5

8:01 pm-4:51 pm

2 stops19h 50m

$852

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 12/20

12:10 pm-10:56 am

3 stops23h 46m

Lambert-St Louis

Mon 1/5

9:45 am-3:04 pm

3 stops28h 19m

$1,565

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 to St. Louis?

In general, September is the cheapest month to fly from Ottawa to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $514. The month of November is another great option to travel to St. Louis, with average flight prices from Ottawa averaging around $516.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $614. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $667. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

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

Direct flights	None

There are no direct flights from Ottawa to St. Louis. There are no popular flight routes from Ottawa to St. Louis.

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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 6h 09m.
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 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.

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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.