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Cheap flights from Ottawa to St. Louis from C$ 787

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 7/9. 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
25 May — 1 Jun1
1 adult
Sat 25/5
Sat 1/6

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 20 May 2024.

Popular in

January

Cheapest in

October

Average price

C$ 928

Round-trip from

C$ 497
High demand for flights, 27% 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.

How far in advance should I book a flight from Ottawa to St. Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 38 days in advance, which can save you up to 45% on flights from Ottawa to St. Louis compared to booking the week you need them. Waiting 38 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 902. For sooner than that we have options available in the next 3 days from C$ 902.

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$ 856 per person but you can even find prices for as low as C$ 645. The most expensive prices can be found in the month of January. Opting for a October flight can save you 37% on your journey compared to booking in January

When is the cheapest time to fly from Ottawa to St. Louis (YOW - 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 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 406,380 searches. Data last updated 20 May 2024.
Find some of the cheapest United Airlines flights travelling from Ottawa to St. Louis. Make sure to check back often as deals are often changing.
Sat 7/95:25 p.m.YOW - STL
1 stop5h 27mUnited Airlines
Tue 10/911:10 a.m.STL - YOW
2 stops9h 53mUnited Airlines
Deal found 18/5C$ 787
Mon 20/59:45 a.m.YOW - STL
2 stops12h 24mUnited Airlines
Thu 23/56:30 a.m.STL - YOW
1 stop14h 18mUnited Airlines
Deal found 19/5C$ 1,206

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 406,380 searches. Data last updated 20 May 2024.
To aid your search, here are some of the cheapest Air Canada flights we've found from Ottawa to St. Louis. Deals frequently update to provide users with more options.
Sat 7/95:55 a.m.YOW - STL
2 stops10h 54mAir Canada
Tue 10/911:10 a.m.STL - YOW
1 stop9h 39mAir Canada
Deal found 19/5C$ 818
Sat 7/98:10 a.m.YOW - STL
2 stops8h 39mAir Canada
Tue 10/911:10 a.m.STL - YOW
2 stops10h 43mAir Canada
Deal found 18/5C$ 825
Mon 20/510:00 a.m.YOW - STL
1 stop6h 21mAir Canada
Thu 23/510:15 a.m.STL - YOW
1 stop10h 33mAir Canada
Deal found 19/5C$ 1,187

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 406,380 searches. Prices were last updated on 20 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.
Mon 20/510:00 a.m.YOW - STL
1 stop6h 21mAir Canada
Thu 23/510:15 a.m.STL - YOW
1 stop10h 33mAir Canada
Deal found 19/5C$ 1,187
Mon 20/59:45 a.m.YOW - STL
2 stops12h 24mUnited Airlines
Thu 23/56:30 a.m.STL - YOW
1 stop14h 18mUnited Airlines
Deal found 19/5C$ 1,206
Mon 20/53:25 p.m.YOW - STL
2 stops26h 21mWestJet
Thu 23/53:27 p.m.STL - YOW
2 stops28h 21mWestJet
Deal found 19/5C$ 1,398
Mon 20/54:15 p.m.YOW - STL
2 stops18h 24mMultiple Airlines
Thu 23/57:30 p.m.STL - YOW
3 stops23h 24mMultiple Airlines
Deal found 19/5C$ 1,598
Mon 20/59:20 a.m.YOW - STL
3 stops32h 56mMultiple Airlines
Thu 23/57:30 p.m.STL - YOW
3 stops19h 59mMultiple Airlines
Deal found 19/5C$ 1,846

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 406,380 searches. Data last updated 20 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.
Sat 7/95:25 p.m.YOW - STL
1 stop5h 27mUnited Airlines
Tue 10/911:10 a.m.STL - YOW
2 stops9h 53mUnited Airlines
Deal found 18/5C$ 787
Sat 7/95:55 a.m.YOW - STL
2 stops10h 54mAir Canada
Tue 10/911:10 a.m.STL - YOW
1 stop9h 39mAir Canada
Deal found 19/5C$ 818
Sat 7/98:10 a.m.YOW - STL
2 stops8h 39mAir Canada
Tue 10/911:10 a.m.STL - YOW
2 stops10h 43mAir Canada
Deal found 18/5C$ 825
Mon 20/510:00 a.m.YOW - STL
1 stop6h 21mAir Canada
Thu 23/510:15 a.m.STL - YOW
1 stop10h 33mAir Canada
Deal found 19/5C$ 1,187
Mon 20/59:45 a.m.YOW - STL
2 stops12h 24mUnited Airlines
Thu 23/56:30 a.m.STL - YOW
1 stop14h 18mUnited Airlines
Deal found 19/5C$ 1,206
Mon 20/53:25 p.m.YOW - STL
2 stops26h 21mWestJet
Thu 23/53:27 p.m.STL - YOW
2 stops28h 21mWestJet
Deal found 19/5C$ 1,398
Mon 20/54:15 p.m.YOW - STL
2 stops18h 24mMultiple Airlines
Thu 23/57:30 p.m.STL - YOW
3 stops23h 24mMultiple Airlines
Deal found 19/5C$ 1,598
Mon 20/59:20 a.m.YOW - STL
3 stops32h 56mMultiple Airlines
Thu 23/57:30 p.m.STL - YOW
3 stops19h 59mMultiple Airlines
Deal found 19/5C$ 1,846

Ottawa to St. Louis flights leaving soon

Find last-minute flight options from Ottawa to St. Louis for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 406,380 searches. Data last updated 20 May 2024.
Have a look at some of the last-minute flights available departing from Ottawa to St. Louis. It's wise to confirm all flight details are correct before booking.
Mon 20/510:00 a.m.YOW - STL
1 stop6h 21mAir Canada
Thu 23/510:15 a.m.STL - YOW
1 stop10h 33mAir Canada
Deal found 19/5C$ 1,187
Mon 20/59:45 a.m.YOW - STL
2 stops12h 24mUnited Airlines
Thu 23/56:30 a.m.STL - YOW
1 stop14h 18mUnited Airlines
Deal found 19/5C$ 1,206
Mon 20/53:25 p.m.YOW - STL
2 stops26h 21mWestJet
Thu 23/53:27 p.m.STL - YOW
2 stops28h 21mWestJet
Deal found 19/5C$ 1,398
Mon 20/54:15 p.m.YOW - STL
2 stops18h 24mMultiple Airlines
Thu 23/57:30 p.m.STL - YOW
3 stops23h 24mMultiple Airlines
Deal found 19/5C$ 1,598
Mon 20/59:20 a.m.YOW - STL
3 stops32h 56mMultiple Airlines
Thu 23/57:30 p.m.STL - YOW
3 stops19h 59mMultiple Airlines
Deal found 19/5C$ 1,846

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 406,380 searches. Data last updated 20 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 787 - C$ 825

Route

Depart

Return

Price

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Sat 7/9

1 stop5h 27m

Lambert-St Louis

Tue 10/9

2 stops9h 53m

C$ 787

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Sat 7/9

2 stops10h 54m

Lambert-St Louis

Tue 10/9

1 stop9h 39m

C$ 818

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Sat 7/9

2 stops8h 39m

Lambert-St Louis

Tue 10/9

2 stops10h 43m

C$ 825

Flights are sorted by cheapest first

Deals found on 18/5

When is the best time to book a flight from Ottawa to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to St. Louis. Price data was last updated on 10 May 2024.
The best time to book flights from Ottawa to St. Louis is 37 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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When is the cheapest time 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 19 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.
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Average price of flights to St. Louis by month

Plan your trip from Ottawa to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Ottawa to St. Louis is currently C$ 0 while a round-trip flight costs C$ 810. Price data was last updated on 12 May 2024.

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$ 559). 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.

January

C$ 497

February

C$ 546

March

C$ 608

April

C$ 547

May

C$ 574

June

C$ 715

July

C$ 761

August

C$ 638

September

C$ 617

October

C$ 652

November

C$ 548

December

C$ 517

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 20 May 2024.
Read reviews from past customers who have flown United Airlines and Air Canada 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.
United Airlines
7.4
Good
10,894 reviews
Check prices

Food

6.7

Comfort

7.2

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 10

For a first class fair this was the worse ever. 1. Long delay departing. 2. Long time landing. 3. Late getting car hire. 4. No compensation whatsoever. Do I need to say more. You check it out yourself.

United Airlines
7.4
Good
10,894 reviews
United Airlines
7.4
Good
10,894 reviews
Check prices

Food

6.7

Comfort

7.2

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 10

For a first class fair this was the worse ever. 1. Long delay departing. 2. Long time landing. 3. Late getting car hire. 4. No compensation whatsoever. Do I need to say more. You check it out yourself.

Air Canada
7.0
Good
6,943 reviews
United Airlines
7.4
Good
10,894 reviews
Check prices

Food

6.7

Comfort

7.2

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 10

For a first class fair this was the worse ever. 1. Long delay departing. 2. Long time landing. 3. Late getting car hire. 4. No compensation whatsoever. Do I need to say more. You check it out yourself.

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$ 800 on Cheapflights?

    Yes, there are multiple flights from Ottawa to St. Louis for under C$ 800. The cheapest flight booked recently is on United Airlines for just C$ 787, but on average you can expect to pay C$ 810.

  • Are there last-minute flights available from Ottawa to St. Louis for under C$ 1,200?

    There are currently 5+ open flights from Ottawa to St. Louis within the next 7 days for less than C$ 1,200.

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

    United Airlines, at C$ 787, was found to be the cheapest airline from Ottawa to St. Louis. An alternate airline flying to your destination would be Air Canada. United Airlines is currently priced 8% 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 19/5.

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 406,380 searches. Data last updated 20 May 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 624AverageC$ 730FlexibilityNo 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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