Cheap flights from Ontario to Illinois from $55
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 Illinois departing on 2/11. 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 Illinois
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 Illinois?
The cheapest month to fly to Illinois from Ontario is in November. Flight prices, which tend to average around $190, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of November, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $242.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Ontario to Illinois is on a Wednesday when prices can be found for as low as $260. Flights from Ontario to Illinois on a Sunday will generally be more expensive and average around $365. 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 Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Ontario to Illinois during this time can be as low as $246. Flights in the morning are often more expensive with an average ticket price of $350.
What is the cheapest Ontario to Illinois flight route?
Fly from Ontario to Chicago Midway for the best Ontario - Illinois flight prices
How far in advance should I book a flight to Illinois?
The best time to book a flight to Illinois from Ontario is 54 days out, which is when prices tend to be around $349. In the past 72 hours, momondo users found flights from Ontario to Illinois for as low as $143.
What cabin class options are available on Ontario to Illinois flights?
There are 1 cabin classes available to choose from on Ontario to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ontario to Illinois?
Frontier, United Airlines, and Alaska Airlines are the most popular carriers operating from Ontario to Illinois
What airlines fly to Illinois?
American Airlines, United Airlines and Spirit Airlines are the top three most popular airlines that fly to Illinois from Ontario according to our data. American Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 9 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ontario to Illinois on average per week?
6 flights are operational weekly from Ontario to Illinois as of January 2025. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.
Cheap Ontario to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Illinois
When did momondo last update prices for flights from Ontario Airport to Illinois?
Prices for flights from Ontario Airport to Illinois were last updated today.
How many operators does momondo search for flights from Ontario Airport to Illinois?
As of January 2025, there are 7 operators available to choose from for flights from Ontario Airport to Illinois.
How old do you have to be to fly from Ontario Airport to Illinois?
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 Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois 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 Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Ontario to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Ontario to Illinois is Airbus A320neo, representing 17.91% of all bookings. The subsequent popular models are Airbus A321neo at 15.67%, Boeing 737 MAX 8 at 10.45%, and Boeing 737-800 Passenger/BBJ2 (winglets) at 10.45%.
Best airlines flying from Ontario to Illinois
Compare and see reviews for airlines that fly from Ontario to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $92 | Free Cancellation | Rating 6.3 8,075 reviews | |||
| PriceFrom $109 | Free Cancellation | Rating 6.0 3,428 reviews | |||
| PriceFrom $161 | Free Cancellation | Rating 8.0 9,643 reviews | |||
| PriceFrom $236 | Free Cancellation | Rating 8.0 8,501 reviews | |||
| PriceFrom $246 | Free Cancellation | Rating 7.4 8,942 reviews | |||
| PriceFrom $247 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $358 | Free Cancellation | Rating 8.1 4,650 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to Illinois?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Illinois. momondo saves you time and could save you money on your trip.
Can I find flights from Ontario to Illinois with flexible booking policies on momondo?
Flights from Ontario to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Ontario to Illinois?
Once you have performed a search for Ontario to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Ontario to Illinois right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from Ontario and alert you when they change.