$179 Find Cheap Flights from Ontario to Missouri

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Low seasonJune
High seasonDecember
Cheapest flight$179
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from Toronto to Kansas City

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.

  • 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 $385.

  • What is the cheapest day to fly to Missouri?

    Based on KAYAK data, the cheapest day to fly to Missouri is Saturday where round-trip tickets can be as cheap as $357. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $541 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 morning, when round-trip flights cost $326 on average. Morning departures are around 23% cheaper than evening flights, on average. The most expensive time of day to fly to Missouri is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $486.

  • What is the cheapest flight to Missouri?

    The cheapest ticket to Missouri from Ontario found in the last 72 hours was to St. Louis, at $187 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 72 hours was $187.

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

    The cheapest month for flights from Ontario to Missouri is April, when tickets cost $310 (return) on average. On the other hand, the most expensive months are October and November, when the average cost of round-trip tickets is $1,170 and $894 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 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

  • How long is the flight to Missouri?

    An average nonstop flight from Ontario to Missouri takes 7h 30m, 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 03m.

  • What are the most popular destinations in Missouri?

    Based on KAYAK flight searches, the most popular destination is St. Louis (62% of total searches to Missouri). The next most popular destinations are Kansas City (30%) and Springfield (5%). Searches for flights to Joplin (3%) 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.
8.0
DeltaOverall score based on 7983 reviews
7.9Comfort
8.2Boarding
7.9Entertainment
8.5Crew
7.3Food
Airline reviews

Leaving on time and having my luggage on my connecting flight

8.0 ExcellentYemi, Jul 2025LOS - ATL
Read more Delta reviews

Leaving on time and having my luggage on my connecting flight

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

After all the weather issues at least they got me to my destination the next day

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

From Atlanta to Savannah - flight connection was way to short (we weren't even late landing ) and flight was already boarding when we landed - we were told we were the last on board and so we had to gate check our bags. Once we got on the plane, there were at least seven open bag spots so that was unnecessary delay. There should be better communication between the gate agent and the crew.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

The way BCN airport handled boarding was a huge improvement over our trip to Spain from JFK. Instead of gate-mosquitos edging in before their zone was called, in BCN they had clearly marked lines for Zones 1-8 and people just lined up correctly. The flight itself was uneventful. The meal (curried chicken and rice) was one of the better meals we've had on Delta. Entertainment options were plentiful, power chargers were available in Main Cabin, and seats were decent. Flight staff were very friendly and positive throughout the 8 hour flight.

It was all good flight was on time, service was good I enjoyed a few movies and everything was smooth

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

Very nice and clean plane. Transit time between flights was tight though

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

So far so good but food and entertainment are not available for this flight

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

AA re-routed flight from HNL to LAX due to delay. My group of 3 with reserved seats in row 9 was broken up, with one assigned to a middle seat, another in the last row of the plane. Not happy. No explanation to the delay. No apologies. No compensation. Would have been nice to be offered an Admiral Club admission or a voucher for the extra 3 hours of layover in LAX. Could not hear the boarding gate announcements in LAX. Adjacent gate was boarding at the same time. Loud speakers were competing against each other. Barely made my boarding group.

Boarding gate in Honolulu was staffed with a great clerk with a soothing voice despite the flight delay of over an hour. Flight attendants in the plane were all grumpy, not pleasant looking bunch. Their sour attitude showed throughout the flight. Inly able to get a select few movies started. Most of the movie links in the “free entertainment” did not work.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

I flew Business Class. Rory, one of the Cabin stewards, was attentive, explained the menu, provided appropriate drinks. was

The flight delay in Dallas created a domino effect that impacted all connecting flights, leading to an increase in the number of connections. As a result, I missed my flight from Casablanca to Marrakech due to the tight turnaround when landing in Casablanca. CMN Airport was understaffed; only one employee was available to assist passengers while others just stood by and watched. It was an extremely frustrating situation. Many passengers were crying and banging their hands on the counter while talking to customer service representative Allabough. Unfortunately, Allabough couldn’t change my flight in the system. At the same time, I was on the phone with an American Airlines customer service representative named Solomon, who said he couldn’t make the change either. So, I decided to take an ONYA Voyages train from Casablanca to Marrakech to reach my destination on Friday, June 26. It turned out to be an unpredictable trip.

The flight was fine and the crew awesome. The problem is ORD and AA. Computers went down, ORD fell apart and a 40 min flight turned into a 3 hour trip. Guess the answer is to not try and fly to ORD after noon. But, as I said, crew was awesome and did everything they could to lesson the flight time.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

This flight never occurred because AA couldn’t get their act together.

Terrible. Cancelled my original flight. It made getting a boarding pass difficult. The AA employee (in a loud voice, so everyone around could hear) griped at me for not getting a boarding pass 24 hours before. I asked how I was supposed to do that when I had no idea what flight I was going to be on. She said (loudly), “Talk to AA customer service, not me!” I could certainly tell serving customers was not important to her. Our new flight was set to a completely different city. We had to change our rental car, and the price went way up. It took 2-1/2 hours to get checked in. By then our new flight had left. We ended up on stand by and had to split up the family to get to our destination. It cost us the whole first day of the trip. AA needs to employ people who actually care about doing a good job. I suppose those people are getting harder to find, but atleast try.

A cookie and a soda, packed like sardines, will never be a positive experience. Also, boarded a 5:30 flight at 7:45pm

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

This was an excellent experience for a very short flight.

No space in overhead bin, one cookie, 2 oz of juice - is not customer service.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

I had a nice flight with free wifi. So I was able to message family members and stream music during my flight, which made the trip go by fast. I also enjoyed flying on there Airbus A220. The plane looked very new and it also got up to speed fast down the runway and didn't need much runway to get airborne.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

Book cheap flights from Ontario to Missouri

Recent round-trip flight deals

8/15Fri
nonstopAir Canada
2h 10mYYZ-STL
8/17Sun
nonstopAir Canada
2h 00mSTL-YYZ
$318
7/30Wed
2 stops
24h 37mYYZ-MCI
8/6Wed
1 stop
14h 57mMCI-YYZ
$321
10/2Thu
1 stop
8h 08mYYZ-MCI
10/5Sun
1 stop
7h 22mMCI-YYZ
$325
9/9Tue
1 stopAmerican Airlines
7h 42mYYZ-STL
9/11Thu
1 stopAmerican Airlines
7h 26mSTL-YYZ
$327
9/26Fri
1 stopAmerican Airlines
17h 11mYUL-STL
9/29Mon
1 stopAmerican Airlines
8h 10mSTL-YUL
$330
8/16Sat
1 stopIberia
8h 00mYYZ-STL
8/18Mon
1 stopIberia
15h 06mSTL-YYZ
$336
8/1Fri
1 stopUnited Airlines
6h 30mYYZ-STL
8/4Mon
1 stopUnited Airlines
5h 28mSTL-YYZ
$345
10/3Fri
1 stopUnited Airlines
17h 09mYUL-STL
10/14Tue
1 stopUnited Airlines
24h 22mSTL-YUL
$368
8/1Fri
1 stopDelta
6h 19mYYZ-STL
8/4Mon
1 stopDelta
5h 36mSTL-YYZ
$384
7/22Tue
2 stopsDelta
12h 56mYYZ-SGF
7/29Tue
2 stopsDelta
16h 43mSGF-YYZ
$503

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Recent one-way flight deals

8/8Fri
2 stops
29h 25mYYZ-MCI
$179
8/8Fri
1 stop
23h 20mYYZ-MCI
$181
9/19Fri
1 stopAmerican Airlines
17h 11mYUL-STL
$187
8/27Wed
1 stopAmerican Airlines
10h 13mYYZ-STL
$187
7/11Fri
1 stopAir Canada
5h 20mYYZ-STL
$190
7/11Fri
1 stopAir Canada
5h 20mYYZ-STL
$195
10/18Sat
1 stopUnited Airlines
8h 24mYUL-STL
$214
9/28Sun
2 stopsUnited Airlines
9h 14mYYZ-STL
$225
9/14Sun
1 stopDelta
6h 31mYUL-STL
$255
8/16Sat
1 stopDelta
11h 21mYUL-MCI
$267

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Last minute flights from Ontario to Missouri

Last minute flight, train and bus deals

7/8Tue
multi-stop
14h 06mYYZ-STL
7/12Sat
multi-stop
12h 02mSTL-YYZ
$535
7/8Tue
multi-stopAmerican Airlines
10h 32mYYZ-STL
7/11Fri
multi-stopAmerican Airlines
16h 06mSTL-YYZ
$538
7/7Mon
multi-stopDelta
17h 15mYYZ-STL
7/12Sat
multi-stopDelta
4h 13mSTL-YYZ
$551
7/6Sun
multi-stopWestJet
6h 09mYYZ-STL
8/1Fri
multi-stopWestJet
5h 36mSTL-YYZ
$780
7/7Mon
multi-stopUnited Airlines
8h 30mYYZ-STL
7/12Sat
multi-stopUnited Airlines
6h 43mSTL-YYZ
$790
7/8Tue
multi-stopWestJet
6h 48mYYZ-MCI
7/15Tue
multi-stopWestJet
9h 51mMCI-YYZ
$805
7/6Sun
multi-stopAir Canada
6h 50mYYZ-STL
8/2Sat
nonstopAir Canada
2h 00mSTL-YYZ
$821
7/6Sun
multi-stopAir Canada
7h 50mYYZ-STL
8/2Sat
nonstopAir Canada
2h 00mSTL-YYZ
$822
7/6Sun
multi-stopUnited Airlines
4h 37mYYZ-STL
8/2Sat
nonstopUnited Airlines
2h 00mSTL-YYZ
$828
7/8Tue
multi-stopDelta
9h 57mYYZ-SGF
7/15Tue
multi-stopDelta
11h 09mSGF-YYZ
$954

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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.

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