C$ 190 Find Cheap Flights from Missouri to Ontario – Compare and Save

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Best Ontario Flight Deals from Missouri

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Sort by: Cheapest
Toronto
1h 54mNonstop
from C$ 495per person
Montreal
2h 31mNonstop
from C$ 640per person
Ottawa
5h 08m2 stops
from C$ 941per person
London
4h 00m3 stops
from C$ 1,353per person
Useful Info

Good to know

Low season

January

Cheapest flight

C$ 190
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly (19% more expensive on average)
Flight from St. Louis to Toronto

FAQs for booking flights from Missouri to Ontario

  • How does KAYAK find such low prices on flights from Missouri to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Missouri to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Missouri to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Missouri to Ontario is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Missouri to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Missouri to Ontario with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Missouri to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many airports are there in Ontario?

    There are 24 airports in Ontario. The busiest airport is Toronto Pearson Airport (YYZ), with 78% of all flights arriving there.

  • What is the cheapest day to fly to Ontario?

    Based on KAYAK data, the cheapest day to fly to Ontario is Saturday when round-trip tickets can be as cheap as C$ 331. On the other hand, the most expensive day to fly is Thursday, when round-trip prices are C$ 1,030 on average.

  • What is the cheapest time of day to fly to Ontario?

    The cheapest time of day to fly to Ontario is generally in the evening, when round-trip flights cost C$ 346 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to Ontario is generally in the afternoon, which is peak travel time and where the average cost of a ticket is C$ 608.

  • What is the cheapest flight to Ontario?

    The cheapest ticket to Ontario from Missouri found in the last 5 days was to Toronto Pearson Intl Airport, at C$ 242 round-trip. The most popular route is St. Louis (STL) to Toronto Pearson Intl Airport (YYZ), and the cheapest round-trip airline ticket found on this route in the last 5 days was C$ 242.

  • What is the cheapest month to fly from Missouri to Ontario?

    The cheapest month for flights from Missouri to Ontario is January, when tickets cost C$ 379 (return) on average. On the other hand, the most expensive months are March and November, when the average cost of round-trip tickets is C$ 1,088 and C$ 1,070 respectively.

  • How many cities have direct flights to Ontario?

    From Missouri, there are direct flights to Ontario from one city. This city is St. Louis and there are 28 direct flights each week.

  • How many direct flights to Ontario are there each day?

    There are around 4 direct flights from within Missouri to Ontario every day. Most flights (50%) depart in the morning.

  • How many direct flights to Ontario are there each week?

    Each week there are around 28 direct flights from within Missouri to Ontario. The most common day for departures is Monday, with 14% of flights taking off on this day.

  • How long is the flight to Ontario?

    An average direct flight from Missouri to Ontario takes 5h 26m, covering a distance of 2342 km. The shortest route is St. Louis (STL) to Toronto Pearson Intl Airport (YYZ) with an average flight time of 1h 54m.

  • How many long-haul flights are there to Ontario each week?

    There aren’t any long-haul (6-12 hour flight duration) or medium-haul (3-6 hour flight duration) flights to Ontario. Instead, there are 28 short-haul flights (up to 3 hour flight duration), with the most arriving from St. Louis.

  • What are the most popular destinations in Ontario?

    Based on KAYAK flight searches, the most popular destination is Ottawa (80% of total searches to Ontario). The next most popular destination is London (20%).

Reviews of the top airlines flying from Missouri to Ontario

 
Need help choosing which airline to fly with from Missouri to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10231 reviews
7.3Comfort
8.1Crew
7.1Entertainment
6.7Food
7.7Boarding
Airline reviews

Upset about cancel to St. John’s and no overnight accomodation

8.0 ExcellentSally, Sep 2026
Read more United Airlines reviews

Upset about cancel to St. John’s and no overnight accomodation

1. Everything was satisfactory concerning the flight. 2. Can't think of what could be better right now.

Entertainment kept turning itself off. Gave up on watching a movie.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Not United Airlines' fault. It's ORL airport's fault.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

Check-in was a nightmare. Wouldn’t let us board with our dog even though he has flown on anir Canada before. Only one of us could go. Will never fly them again.

Flight got cancelled and didn't get another flight til late and almost missed the connection because so close. We are still waiting for the bags to arrive the next day.

Boarded on time and arrived early. Overall quick flight. Snack and beverage offered.

Good but I don’t received my bags yet is been 5days still no update

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Friendlier staff who are nice to the elderly who need assistance

Service was great. Flight was delayed an hour which made our connection very tight and stressful. But we fortunately made it.

There was a mistake with the first name we only discovered at security. Air canada was unable to correct it to match then passport since it was booked through an agency. The agency could not correct it either since they need at least two hours to do that. We could not fly and lost a bunch of money. Learned my lesson about kayak.

I appreciate the fact that the flight took off and landed on time What I didn’t like they never offer a snack eg nuts/cookies/chips

Air Canada seems to be understaffed which caused delays at every point of the flight—delays at departure, delays in the air (circling), delay after landing, delays at the gate before disembarking. Horrible experience. And my son, who departed Toronto today, experienced delays because the passport scanning system was down and was told that he would not be able to board his flight. Toronto airport is a mess!!!!

More options for your flight to Ontario

Complete your trip to Ontario with a hotel stay or car rental