$191 Find Cheap Flights from Ontario to Missouri - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Missouri departing on 7/8. 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.
1 adult
1 adult, Economy, 0 bags

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Good to know

Low seasonJanuary
Cheapest flight$191
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Toronto to St. Louis

FAQs for booking flights from Ontario to Missouri

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

    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 Ontario to Missouri.

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

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

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

    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 Ontario to Missouri 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 Ontario to Missouri?

    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 Ontario to Missouri 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 Missouri?

    There are 8 airports in Missouri. The busiest airport is St. Louis Lambert Airport (STL), with 48% of all flights arriving there.

  • Which is the cheapest airport to fly into in Missouri?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Missouri is Lambert-St Louis Airport (STL), with an average flight price of $407.

  • What is the cheapest day to fly to Missouri?

    Based on KAYAK data, the cheapest day to fly to Missouri is Sunday where round-trip tickets can be as cheap as $394. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $548 on average.

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

    The cheapest time of day to fly to Missouri is generally in the evening, when round-trip flights cost $405 on average. Morning departures are around 27% more expensive than evening flights, on average. The most expensive time of day to fly to Missouri is generally at night, which is peak travel time and where the average cost of a ticket is $584.

  • What is the cheapest flight to Missouri?

    The cheapest ticket to Missouri from Ontario found in the last 5 days was to St. Louis, at $445 round-trip. The most popular route is Toronto Pearson Intl Airport (YYZ) to St. Louis (STL) and the cheapest round-trip airline ticket found on this route in the last 5 days was $445.

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

    The cheapest month for flights from Ontario to Missouri is May, when tickets cost $146 (return) on average. On the other hand, the most expensive months are April and November, when the average cost of round-trip tickets is $264 and $220 respectively.

  • How far in advance should I book a flight from Ontario to Missouri?

    To get a below average price on the flight from Ontario to Missouri, you should book around 3 weeks before departure, which saves you about 52% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

  • How many cities have direct flights to Missouri?

    From Ontario, there are direct flights to Missouri from 1 city. This city is Toronto and there are 52 direct flights each week.

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

    There are around 8 direct flights from within Ontario to Missouri every day. Most flights (50%) depart in the morning.

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

    Each week there are around 52 direct flights from within Ontario to Missouri. The most common day for departures is Monday, with 15% of flights taking off on this day.

  • How long is the flight to Missouri?

    An average nonstop flight from Ontario to Missouri takes 5h 08m, covering a distance of 910 miles. The shortest route is Toronto Pearson Intl Airport (YYZ) to St. Louis (STL) with an average flight time of 2h 05m.

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

    There are not any long-haul (6-12 hour flight duration) or medium-haul (3-6 hour flight duration) flights to Missouri. Instead, there are 52 short-haul flights (up to 3 hour flight duration), with the most arriving from Toronto.

  • What are the most popular destinations in Missouri?

    Based on KAYAK flight searches, the most popular destination is Kansas City (67% of total searches to Missouri). The next most popular destinations are St. Louis (32%) and Springfield (1%). Searches for flights to Joplin (0%) are also popular.

Reviews of the top 4 airlines serving from Ontario to Missouri

 
Need help choosing which airline to fly with from Ontario to Missouri? 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.
7.8
DeltaOverall score based on 8407 reviews
7.8Comfort
7.8Entertainment
7.2Food
8.5Crew
8.1Boarding
Airline reviews

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

10.0 ExcellentJOSEPH, Jun 2026
RIC - ATL
Read more Delta reviews

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Boarding was smooth and efficient. The only food was some pretzels, but it was a short flight. Not much to order if you were hungry.

Crew were welcoming, accommodating and they worked hard to find places for all carry on.

Seats very comfortable; service efficient and pleasant; flight was on-time; boarding organized.

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

very average service no complimentary alcoholics drinks unlike other airlines such as Porter airlines No decent seats available during check-in time the day before

Good but airlines getting smaller. I didn't like the meal but the service was fine. Flight was fine and luggage arrived. So good.

They were fast and I like how they used to entertainment system to play video about the safety.

Hopped on time for the flight only to get deplaned and delayed another 2.5 hours.

Given I (and I’m assuming most people) have both carry in and a personal item included in their fare, I find it very unfair that on neither of my flights I was able to use the overhead for my small backpack because they were completely rammed with luggage, people personal items, jackets, hats and other items. So the only item I brought in had to be stuffed under my seat while they had their leg room and sat comfortable with all of their items in the overhead. This has to stop because I was uncomfortable on both flights when I only had one smaller item that could not be checked due to its contents (medication etc). Plenty of people could have checked theirs but chose not to and then took up the space allotment for 2 people.

Flight attendants had a little attitude. Food tastes no good.

The flight didn’t happen because they apparently lost my check in and wouldn’t let me board.

Access to movies was rather confusing. Apart from that, I have no complaints.

As someone who never flies WestJet unless there is no other viable option I have to give this crew credit where credit is due. Extremely well done everyone.

Flight left on time. The crew was very friendly. I had to buy a proper meal. Small cookie and a drink just doesn’t cut it for a 4.5 hours flight.

Experience was good, the wifi hook up is somewhat tough

I will not be flying with westjet again. I was uncomfortable in my seat. The position made my back hurt so bad. My wife was able to fit the seatbelt around her with out an extension but was unable to put the tray table down or fit in the seat for that matter. Our bag was smashed and I spent two hours trying to fill out the application for a damaged bag before I gave up. The 80 photos I took would not work and nothing telling me the format to upload them as.. I made the mistake of unpacking the bag before taking photos so no claim for me. Next trip to Canada I will have to use air Canada.

My luggage was damaged 1 wheel was out I can't find it nowhere

Took 3 hours to check in and drop off our suitcases. Half of the passengers were still in line by boarding time. The computer systems and staff were very slow. Staff were also disorganized and kept allowing later flights to skip lines. Suitcases were piling on that several other passengers didn't get their suitcases. Then, we were sitting in the plane for 2 hours and were told that the flight was overbooked. We missed our connecting flight and had to fly the following day but with a stop over. Good thing ONE WestJet customer rep was pleasant and actually knew how to do her job when we wanted to rebook to a direct flight. Thank you to Kim at Toronto airport. Terrible experience at PUJ. Won't go back to Dominican Republic.

Great seats, super comfortable, but no in flight entertainment which was a let down

Airplane is too small. Crew, especially the flight attendant who looked after our area, was not at all friendly and a touch authoratative. She may have been the most gruff flight attendant i've come across in 40 years of business travel

The flight was good. My luggage didn’t land with me when I arrived in Columbus. So grateful I was able to get my luggage back within the 2 hours😍👍.

It was a nice and smooth trip. Gave a friendly environment throughout the journey.

Meal and drink service was good. Old plane with old business class seats were quite disappointing

Flight itself was not bad at all. However: my checked bag (checked in Calgary) did not make it onto this flight as I found out after I landed at EWR. I still don't have it but it appears that it is on its way to me.

Flight and attendance were very good we had 2 hour delay that took the shine of it

The seat design in the premium economy section leaves virtually no room under the seat to store a bag or purse. Other than that, it was a great flight. Arrived early.

The flight was delayed, but not for weather. We landed over 3hrs later than planned.

The stag were helpful, kind and liked the passengers. The plane was pristinely clean! Great flight!

My flight was delayed more than once, but Air Canada updated us regularly. Friends on other airlines had much worse experiences.

Terrible…. Reported missing luggage’s with injectable meds that needed refrigeration. Yet, delivery could not be expedited. Luggage’s were delivered 5 days after arrival. The meds were useless as ice pack had melted. So disappointed!!!

Everything you need to know for your flight to Missouri

Cabin class types available on flights to Ontario

Cabin classes available on flights to Ontario. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.