Cheap flights from Ontario to Missouri from $100
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Missouri departing on 6/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Ontario to Missouri
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Missouri?
In general, August is the cheapest month to fly from Ontario to Missouri. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $250. If you aren’t able to travel to Missouri during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $269.
What is the cheapest day to depart on your flight to Missouri?
The cheapest day to depart from Ontario to Missouri is on a Monday when prices can be found for as low as $261. Flights from Ontario to Missouri on a Sunday will generally be more expensive and average around $417. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Missouri?
According to our data, the cheapest time of day to fly to Missouri is in the evening. momondo users have found flights departing from Ontario to Missouri in the evening for as low as $189. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Missouri are more costly in the afternoon, with an average ticket price of $461. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.
How far in advance should I book a flight to Missouri?
You are more likely to see cheaper flights to Missouri from Ontario when booking 5 weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around $348 when searching 5 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Ontario for as low as $229 on momondo.
What is the cheapest airline that flies from Ontario to Missouri?
Frontier, Hawaiian Airlines, and Delta are the most popular carriers operating from Ontario to Missouri
What airlines fly to Missouri?
American Airlines, Southwest and Spirit Airlines are the top three most popular airlines that fly to Missouri from Ontario according to our data. American Airlines is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Missouri. Keep in mind that there are 8 different airlines that fly to Missouri on a routine basis, so you have a few additional options to choose from.
Cheap Ontario to Missouri flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Missouri
When did momondo last update prices for flights from Ontario Airport to Missouri?
Prices for flights from Ontario Airport to Missouri were last updated today.
How many operators does momondo search for flights from Ontario Airport to Missouri?
As of June 2025, there are 6 operators available to choose from for flights from Ontario Airport to Missouri.
How old do you have to be to fly from Ontario Airport to Missouri?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Missouri.
What documentation or ID do you need to fly to Missouri?
The travel and health documents required for your trip to Missouri can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Missouri. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from Ontario to Missouri
Compare and see reviews for airlines that fly from Ontario to Missouri with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $72 | Free Cancellation | Rating 6.3 8,034 reviews | |||
| PriceFrom $115 | Free Cancellation | Rating 5.9 3,291 reviews | |||
| PriceFrom $263 | Free Cancellation | Rating 7.4 8,774 reviews | |||
| PriceFrom $268 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $284 | Free Cancellation | Rating 8.0 7,958 reviews | |||
| PriceFrom $322 | Free Cancellation | Rating 8.0 4,288 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to Missouri?
Finding the right flight to Missouri from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Missouri quick and easy, saving you time and money.
Can I find flights from Ontario to Missouri with flexible booking policies on momondo?
momondo does allow users to show only those flights to Missouri from Ontario which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Ontario to Missouri?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Missouri.
I’m not ready to book a flight from Ontario to Missouri right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Ontario to Missouri flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.