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Cheap flights from Ottawa (YOW) to St. Louis (STL) from $503

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/25. 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.
YOW — STL
jun. 4 — jun. 111
From?
To?
mar. 6/4
mar. 6/11
1 adult, Economy
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Cheap flight deals from Ottawa to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated mayo 30, 2024.

Popular in

January

Cheapest in

October

Average price

$682

Round-trip from

$319
High demand for flights, 28% potential price rise
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Best time to find cheap flights, 16% potential price drop
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Average for round-trip flights in May 2024
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From Ottawa to Lambert-St Louis
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What is the cheapest day to fly round-trip from Ottawa to St. Louis?

It’s generally more expensive to depart on a Friday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Due to multiple factors, expect to potentially pay more when booking in January. For low rates, October can be a great choice for travel to St. Louis. Flights to St. Louis from Ottawa in October are about $626 on average during October, but can be found for as low as $474.

What is the cheapest time of day to fly from YOW to STL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to St. Louis as you normally would.

Cheap Air Canada flights from Ottawa to St. Louis

Explore cheap flight options specifically provided by Air Canada for the route between Ottawa and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
Take a peek at the cheapest Air Canada flights we've detected traveling from Ottawa to St. Louis. It's recommended that users confirm their flight details before booking.
jue. 7/112:00 pmYOW - STL
1 stop7h 01mAir Canada
lun. 7/153:10 pmSTL - YOW
1 stop5h 42mAir Canada
Deal found 5/29$606
jue. 6/279:20 amYOW - STL
1 stop7h 01mAir Canada
jue. 7/46:30 amSTL - YOW
1 stop9h 34mAir Canada
Deal found 5/28$615

Cheap United Airlines flights from Ottawa to St. Louis

Explore cheap flight options specifically provided by United Airlines for the route between Ottawa and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
Take a gander at the lowest prices we've found on United Airlines flights from Ottawa to St. Louis. Deals are refreshing constantly so come back soon for more options.
jue. 7/116:03 pmYOW - STL
1 stop5h 34mUnited Airlines
lun. 7/153:10 pmSTL - YOW
1 stop5h 42mUnited Airlines
Deal found 5/28$609
jue. 6/276:30 amYOW - STL
1 stop10h 10mUnited Airlines
jue. 7/46:30 amSTL - YOW
2 stops16h 29mUnited Airlines
Deal found 5/28$639
jue. 7/116:03 pmYOW - STL
1 stop5h 34mUnited Airlines
lun. 7/1510:19 amSTL - YOW
2 stops12h 40mUnited Airlines
Deal found 5/30$671
mar. 6/256:38 amYOW - STL
1 stop10h 03mUnited Airlines
jue. 6/276:08 amSTL - YOW
1 stop5h 47mUnited Airlines
Deal found 5/29$687

Cheap Ottawa to St. Louis flights in May & June 2024

Find cheap flight options from Ottawa to St. Louis specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Prices were last updated on mayo 30, 2024.
Listed are some of the best fares we've found on flights departing from Ottawa to St. Louis in 2024. For more flight deals, be sure to check back very soon.
mar. 6/258:55 amYOW - STL
2 stops29h 10mMultiple Airlines
jue. 6/276:22 pmSTL - YOW
2 stops24h 45mMultiple Airlines
Deal found 5/29$503
mar. 6/258:55 amYOW - STL
2 stops29h 10mMultiple Airlines
jue. 6/278:12 pmSTL - YOW
3 stops27h 16mMultiple Airlines
Deal found 5/29$538
mar. 6/257:20 amYOW - STL
3 stops30h 45mMultiple Airlines
jue. 6/278:12 pmSTL - YOW
3 stops27h 16mMultiple Airlines
Deal found 5/29$577
jue. 6/279:20 amYOW - STL
1 stop7h 01mAir Canada
jue. 7/46:30 amSTL - YOW
1 stop9h 34mAir Canada
Deal found 5/28$615
jue. 6/273:25 pmYOW - STL
2 stops44h 10mWestJet
jue. 7/44:02 pmSTL - YOW
2 stops27h 40mWestJet
Deal found 5/28$633
jue. 6/276:30 amYOW - STL
1 stop10h 10mUnited Airlines
jue. 7/46:30 amSTL - YOW
2 stops16h 29mUnited Airlines
Deal found 5/28$639
jue. 6/279:05 amYOW - STL
3 stops30h 11mMultiple Airlines
jue. 7/412:15 pmSTL - YOW
3 stops21h 59mMultiple Airlines
Deal found 5/28$640
jue. 6/278:55 amYOW - STL
2 stops11h 27mMultiple Airlines
jue. 7/412:15 pmSTL - YOW
3 stops21h 59mMultiple Airlines
Deal found 5/28$649
mar. 6/256:38 amYOW - STL
1 stop10h 03mUnited Airlines
jue. 6/276:08 amSTL - YOW
1 stop5h 47mUnited Airlines
Deal found 5/29$687

Ottawa to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Ottawa and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
Listed are some of the best fares we've found on flights departing from Ottawa to St. Louis in 2024. For more flight deals, be sure to check back very soon.
mar. 6/258:55 amYOW - STL
2 stops29h 10mMultiple Airlines
jue. 6/276:22 pmSTL - YOW
2 stops24h 45mMultiple Airlines
Deal found 5/29$503
mar. 6/258:55 amYOW - STL
2 stops29h 10mMultiple Airlines
jue. 6/278:12 pmSTL - YOW
3 stops27h 16mMultiple Airlines
Deal found 5/29$538
jue. 7/114:35 pmYOW - STL
3 stops28h 20mMultiple Airlines
lun. 7/157:45 amSTL - YOW
3 stops26h 57mMultiple Airlines
Deal found 5/29$559
mar. 6/257:20 amYOW - STL
3 stops30h 45mMultiple Airlines
jue. 6/278:12 pmSTL - YOW
3 stops27h 16mMultiple Airlines
Deal found 5/29$577
jue. 7/117:40 amYOW - STL
2 stops13h 19mMultiple Airlines
lun. 7/154:02 pmSTL - YOW
2 stops21h 29mMultiple Airlines
Deal found 5/29$600
jue. 7/119:20 amYOW - STL
1 stop7h 01mMultiple Airlines
lun. 7/153:10 pmSTL - YOW
1 stop5h 42mMultiple Airlines
Deal found 5/28$605
jue. 7/112:00 pmYOW - STL
1 stop7h 01mAir Canada
lun. 7/153:10 pmSTL - YOW
1 stop5h 42mAir Canada
Deal found 5/29$606
jue. 7/116:03 pmYOW - STL
1 stop5h 34mUnited Airlines
lun. 7/153:10 pmSTL - YOW
1 stop5h 42mUnited Airlines
Deal found 5/28$609
jue. 6/279:20 amYOW - STL
1 stop7h 01mAir Canada
jue. 7/46:30 amSTL - YOW
1 stop9h 34mAir Canada
Deal found 5/28$615

Find flights from Ottawa to St. Louis within your budget

Customize your flight search to find flights from Ottawa to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$503 - $639

Route

Depart

Return

Price

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

mar. 6/25

2 stops29h 10m

Lambert-St Louis

jue. 6/27

2 stops24h 45m

$503

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

mar. 6/25

2 stops29h 10m

Lambert-St Louis

jue. 6/27

3 stops27h 16m

$538

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

jue. 7/11

3 stops28h 20m

Lambert-St Louis

lun. 7/15

3 stops26h 57m

$559

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

mar. 6/25

3 stops30h 45m

Lambert-St Louis

jue. 6/27

3 stops27h 16m

$577

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

jue. 7/11

1 stop7h 01m

Lambert-St Louis

lun. 7/15

1 stop5h 42m

$606

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

jue. 7/11

1 stop5h 34m

Lambert-St Louis

lun. 7/15

1 stop5h 42m

$609

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

jue. 6/27

1 stop7h 01m

Lambert-St Louis

jue. 7/4

1 stop9h 34m

$615

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

jue. 6/27

2 stops44h 10m

Lambert-St Louis

jue. 7/4

2 stops27h 40m

$633

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

jue. 6/27

1 stop10h 10m

Lambert-St Louis

jue. 7/4

2 stops16h 29m

$639

Flights are sorted by cheapest first

Deals found on 5/29

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

Use this chart to determine the cheapest time to fly round-trip from Ottawa to St. Louis. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ottawa to St. Louis flight should consider departing on Saturday mornings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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Best time to book a flight from Ottawa to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Ottawa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature and rainfall totals by month.

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated mayo 30, 2024.
Peruse reviews from past customers who have flown with Air Canada and United Airlines from Ottawa to St. Louis to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
WestJet
7.5
Good
2,866 reviews
Check prices

Entertainment

6.4

Comfort

7.3

Food

6.4

Boarding

7.7

Overall

7.5

Crew

8.1

Reviews

1 / 10

It’s a discount flight so you have to expect to be crammed in. Then there is the food strike at a supplier we were all warned of and they were good with snacks. The attendants were great. I’ll fly them a hand I recommend them, for what they are.

WestJet
7.5
Good
2,866 reviews
WestJet
7.5
Good
2,866 reviews
Check prices

Entertainment

6.4

Comfort

7.3

Food

6.4

Boarding

7.7

Overall

7.5

Crew

8.1

Reviews

1 / 10

It’s a discount flight so you have to expect to be crammed in. Then there is the food strike at a supplier we were all warned of and they were good with snacks. The attendants were great. I’ll fly them a hand I recommend them, for what they are.

United Airlines
7.4
Good
10,777 reviews
WestJet
7.5
Good
2,866 reviews
Check prices

Entertainment

6.4

Comfort

7.3

Food

6.4

Boarding

7.7

Overall

7.5

Crew

8.1

Reviews

1 / 10

It’s a discount flight so you have to expect to be crammed in. Then there is the food strike at a supplier we were all warned of and they were good with snacks. The attendants were great. I’ll fly them a hand I recommend them, for what they are.

Air Canada
7.0
Good
7,004 reviews
WestJet
7.5
Good
2,866 reviews
Check prices

Entertainment

6.4

Comfort

7.3

Food

6.4

Boarding

7.7

Overall

7.5

Crew

8.1

Reviews

1 / 10

It’s a discount flight so you have to expect to be crammed in. Then there is the food strike at a supplier we were all warned of and they were good with snacks. The attendants were great. I’ll fly them a hand I recommend them, for what they are.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Ottawa to St. Louis for under $600 on Cheapflights?

    Yes, there are multiple flights from Ottawa to St. Louis for under $600. The cheapest flight booked recently is on Multiple Airlines for just $503, but on average you can expect to pay $608.

  • What are the cheapest airlines flying from Ottawa to St. Louis round-trip?

    Our cheapest airline available from Ottawa to St. Louis is Air Canada. Our recent data shows that you can find tickets from as low as $606 on this airline. Additional options worth looking into are United Airlines and WestJet, starting at $609 and $633 round-trip. You may be able to fly from Ottawa to St. Louis for 3% less than the average price by searching for these airlines.

  • What does YOW to STL mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Ottawa Airport to Lambert-St Louis Airport flight would often be abbreviated as a YOW to STL flight.

  • Can I find deals for flights from Ottawa to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your Ottawa to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ottawa to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ottawa to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Ottawa to St. Louis that include hotel bookings?

    Yes. In addition to deals on Ottawa to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to St. Louis.

  • Can I find deals for business class flights from Ottawa to St. Louis?

    Yes. Cheapflights offers flight deals from Ottawa to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ottawa to St. Louis that allow pets onboard?

    Many airlines flying from Ottawa to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ottawa to St. Louis?

    Yes, you can often find last-minute deals on Ottawa to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ottawa to St. Louis flight deals updated?

    The Ottawa to St. Louis flight deals you see on this page were last updated on 5/29.

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

    Currently, September is the cheapest month in which you can book a flight from Ottawa to St. Louis (average of $319). Flying from Ottawa to St. Louis in July is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Ottawa to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.

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Top airline flying from Ottawa to St. Louis

Discover the top airline that operate flights from Ottawa to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$487Average$587FlexibilityNo cancel feeOn-time67%
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Search flights from Ottawa to St. Louis by cabin class

Find flights from Ottawa to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ottawa to St. Louis?

Cheapflights makes it easy to find Ottawa to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to St. Louis?

Millions of users choose and trust Cheapflights to book the best flight deals from Ottawa to St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ottawa to St. Louis with no change fees?

Certainly. Search results for flights to St. Louis from Ottawa shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Ottawa to St. Louis become cheaper?

Yes! Start tracking prices for Ottawa to St. Louis flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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