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Cheap flights from Ottawa to St. Louis from C$ 688

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 25/6. 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
4 Jun — 11 Jun1
1 adult
Tue 4/6
Tue 11/6

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 30 May 2024.

Popular in

January

Cheapest in

October

Average price

C$ 933

Round-trip from

C$ 500
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?

Departing on a Sunday is a good option for securing a great price. You can expect to save up to 33% when planning your travel around this day of the week.

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

October is one of the best times of the year to fly to St. Louis from Ottawa. Prices for October average C$ 857 per person but you can even find prices for as low as C$ 649. The most expensive prices can be found in the month of January. Opting for a October flight can save you 38% on your journey compared to booking in January

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

When flying from Ottawa to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 426,053 searches. Data last updated 30 May 2024.
Find some of the cheapest Air Canada flights travelling from Ottawa to St. Louis. Make sure to check back often as deals are often changing.
Thu 11/72:00 p.m.YOW - STL
1 stop7h 01mAir Canada
Mon 15/73:10 p.m.STL - YOW
1 stop5h 42mAir Canada
Deal found 29/5C$ 829
Thu 27/69:20 a.m.YOW - STL
1 stop7h 01mAir Canada
Thu 4/76:30 a.m.STL - YOW
1 stop9h 34mAir Canada
Deal found 28/5C$ 841

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 426,053 searches. Data last updated 30 May 2024.
To aid your search, here are some of the cheapest United Airlines flights we've found from Ottawa to St. Louis. Deals frequently update to provide users with more options.
Thu 11/76:03 p.m.YOW - STL
1 stop5h 34mUnited Airlines
Mon 15/73:10 p.m.STL - YOW
1 stop5h 42mUnited Airlines
Deal found 28/5C$ 833
Thu 27/66:30 a.m.YOW - STL
1 stop10h 10mUnited Airlines
Thu 4/76:30 a.m.STL - YOW
2 stops16h 29mUnited Airlines
Deal found 28/5C$ 874
Thu 11/76:03 p.m.YOW - STL
1 stop5h 34mUnited Airlines
Mon 15/710:19 a.m.STL - YOW
2 stops12h 40mUnited Airlines
Deal found 30/5C$ 918
Tue 25/66:38 a.m.YOW - STL
1 stop10h 03mUnited Airlines
Thu 27/66:08 a.m.STL - YOW
1 stop5h 47mUnited Airlines
Deal found 29/5C$ 940

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 426,053 searches. Prices were last updated on 30 May 2024.
These are some of the most attractive deals on flights from Ottawa to St. Louis in 2024. Check back regularly for other flight deals.
Tue 25/68:55 a.m.YOW - STL
2 stops29h 10mMultiple Airlines
Thu 27/66:22 p.m.STL - YOW
2 stops24h 45mMultiple Airlines
Deal found 29/5C$ 688
Tue 25/68:55 a.m.YOW - STL
2 stops29h 10mMultiple Airlines
Thu 27/68:12 p.m.STL - YOW
3 stops27h 16mMultiple Airlines
Deal found 29/5C$ 736
Tue 25/67:20 a.m.YOW - STL
3 stops30h 45mMultiple Airlines
Thu 27/68:12 p.m.STL - YOW
3 stops27h 16mMultiple Airlines
Deal found 29/5C$ 789
Thu 27/69:20 a.m.YOW - STL
1 stop7h 01mAir Canada
Thu 4/76:30 a.m.STL - YOW
1 stop9h 34mAir Canada
Deal found 28/5C$ 841
Thu 27/63:25 p.m.YOW - STL
2 stops44h 10mWestJet
Thu 4/74:02 p.m.STL - YOW
2 stops27h 40mWestJet
Deal found 28/5C$ 866
Thu 27/66:30 a.m.YOW - STL
1 stop10h 10mUnited Airlines
Thu 4/76:30 a.m.STL - YOW
2 stops16h 29mUnited Airlines
Deal found 28/5C$ 874
Thu 27/69:05 a.m.YOW - STL
3 stops30h 11mMultiple Airlines
Thu 4/712:15 p.m.STL - YOW
3 stops21h 59mMultiple Airlines
Deal found 28/5C$ 876
Thu 27/68:55 a.m.YOW - STL
2 stops11h 27mMultiple Airlines
Thu 4/712:15 p.m.STL - YOW
3 stops21h 59mMultiple Airlines
Deal found 28/5C$ 888
Tue 25/66:38 a.m.YOW - STL
1 stop10h 03mUnited Airlines
Thu 27/66:08 a.m.STL - YOW
1 stop5h 47mUnited Airlines
Deal found 29/5C$ 940

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 426,053 searches. Data last updated 30 May 2024.
These are some of the most attractive deals on flights from Ottawa to St. Louis in 2024. Check back regularly for other flight deals.
Tue 25/68:55 a.m.YOW - STL
2 stops29h 10mMultiple Airlines
Thu 27/66:22 p.m.STL - YOW
2 stops24h 45mMultiple Airlines
Deal found 29/5C$ 688
Tue 25/68:55 a.m.YOW - STL
2 stops29h 10mMultiple Airlines
Thu 27/68:12 p.m.STL - YOW
3 stops27h 16mMultiple Airlines
Deal found 29/5C$ 736
Thu 11/74:35 p.m.YOW - STL
3 stops28h 20mMultiple Airlines
Mon 15/77:45 a.m.STL - YOW
3 stops26h 57mMultiple Airlines
Deal found 29/5C$ 765
Tue 25/67:20 a.m.YOW - STL
3 stops30h 45mMultiple Airlines
Thu 27/68:12 p.m.STL - YOW
3 stops27h 16mMultiple Airlines
Deal found 29/5C$ 789
Thu 11/77:40 a.m.YOW - STL
2 stops13h 19mMultiple Airlines
Mon 15/74:02 p.m.STL - YOW
2 stops21h 29mMultiple Airlines
Deal found 29/5C$ 821
Thu 11/79:20 a.m.YOW - STL
1 stop7h 01mMultiple Airlines
Mon 15/73:10 p.m.STL - YOW
1 stop5h 42mMultiple Airlines
Deal found 28/5C$ 828
Thu 11/72:00 p.m.YOW - STL
1 stop7h 01mAir Canada
Mon 15/73:10 p.m.STL - YOW
1 stop5h 42mAir Canada
Deal found 29/5C$ 829
Thu 11/76:03 p.m.YOW - STL
1 stop5h 34mUnited Airlines
Mon 15/73:10 p.m.STL - YOW
1 stop5h 42mUnited Airlines
Deal found 28/5C$ 833
Thu 27/69:20 a.m.YOW - STL
1 stop7h 01mAir Canada
Thu 4/76:30 a.m.STL - YOW
1 stop9h 34mAir Canada
Deal found 28/5C$ 841

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 426,053 searches. Data last updated 30 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 688 - C$ 874

Route

Depart

Return

Price

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Tue 25/6

2 stops29h 10m

Lambert-St Louis

Thu 27/6

2 stops24h 45m

C$ 688

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Tue 25/6

2 stops29h 10m

Lambert-St Louis

Thu 27/6

3 stops27h 16m

C$ 736

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Thu 11/7

3 stops28h 20m

Lambert-St Louis

Mon 15/7

3 stops26h 57m

C$ 765

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Tue 25/6

3 stops30h 45m

Lambert-St Louis

Thu 27/6

3 stops27h 16m

C$ 789

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Thu 11/7

1 stop7h 01m

Lambert-St Louis

Mon 15/7

1 stop5h 42m

C$ 829

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Thu 11/7

1 stop5h 34m

Lambert-St Louis

Mon 15/7

1 stop5h 42m

C$ 833

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Thu 27/6

1 stop7h 01m

Lambert-St Louis

Thu 4/7

1 stop9h 34m

C$ 841

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Thu 27/6

2 stops44h 10m

Lambert-St Louis

Thu 4/7

2 stops27h 40m

C$ 866

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Thu 27/6

1 stop10h 10m

Lambert-St Louis

Thu 4/7

2 stops16h 29m

C$ 874

Flights are sorted by cheapest first

Deals found on 29/5

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 26 May 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ottawa to St. Louis flight should consider departing on Monday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

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

0 - 27 °C

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 30 May 2024.
Read reviews from past customers who have flown Air Canada and United Airlines from Ottawa to St. Louis. 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

Crew

8.1

Entertainment

6.4

Food

6.4

Comfort

7.3

Boarding

7.7

Overall

7.5

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

Crew

8.1

Entertainment

6.4

Food

6.4

Comfort

7.3

Boarding

7.7

Overall

7.5

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

Crew

8.1

Entertainment

6.4

Food

6.4

Comfort

7.3

Boarding

7.7

Overall

7.5

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

Crew

8.1

Entertainment

6.4

Food

6.4

Comfort

7.3

Boarding

7.7

Overall

7.5

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 C$ 700 on Cheapflights?

    Yes, there are multiple flights from Ottawa to St. Louis for under C$ 700. The cheapest flight booked recently is on Multiple Airlines for just C$ 688, but on average you can expect to pay C$ 832.

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

    Air Canada, at C$ 829, was found to be the cheapest airline from Ottawa to St. Louis.Alternate airlines to your destination round-trip include United Airlines and WestJet. Air Canada is currently priced 3% below the average price you’ll pay for this route.

  • 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 29/5.

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

    Currently, January is the cheapest month in which you can book a flight from Ottawa to St. Louis (average of C$ 365). Flying from Ottawa to St. Louis in July is currently the most expensive (average of C$ 558). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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 426,053 searches. Data last updated 30 May 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 628AverageC$ 734FlexibilityNo 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.
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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?

When you search for this flight from Ottawa to St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to St. Louis from Ottawa by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to St. Louis flexibly with Cheapflights today.

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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