Cheap flights from Ontario to Chicago from $61
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 Chicago departing on 9/8. 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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Frontier flights from Ontario to Chicago Midway Airport
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How to get the cheapest flight ticket from Ontario to Chicago Midway Airport
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 Chicago Midway Airport?
The month of October is, on average, the cheapest month to fly to Chicago Midway Airport from Ontario, with most prices found around $166. If you are unable to visit Chicago Midway Airport during the month of October, then departing from Ontario during the month September is also very affordable. Most momondo users find prices during this month for around $220.
What is the cheapest day to depart on your flight to Chicago Midway Airport?
According to our data, Tuesday is the cheapest day to fly to Chicago Midway Airport from Ontario. The lowest ticket price found for a Tuesday departure recently was $378. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $507.
What is the cheapest time of day to depart on your flight to Chicago Midway Airport?
Flying to Chicago Midway Airport from Ontario in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $320 when looking at flights departing in the afternoon. Try not to purchase tickets at noon because they tend to be around $481. Of course, these prices can vary depending on the time of year and what airport you fly to.
What is the cheapest Ontario to Chicago Midway flight route?
Fly from Ontario to Chicago Midway for the best Ontario - Chicago Midway flight prices
How far in advance should I book a flight to Chicago Midway Airport?
You are more likely to see cheaper flights to Chicago Midway Airport from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago Midway Airport for around $334 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago Midway Airport from Ontario for as low as $193 on momondo.
What cabin class options are available on Ontario to Chicago Midway flights?
There are 1 cabin classes available to choose from on Ontario to Chicago Midway 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 Chicago Midway?
Frontier and Southwest are the most popular carriers operating from Ontario to Chicago Midway
What airlines fly to Chicago Midway Airport?
Southwest, Frontier and Delta are the top three most popular airlines that fly to Chicago Midway Airport from Ontario according to our data. Southwest is the first choice among our users, with 72% of people opting to fly with this airline when traveling to Chicago Midway Airport. Keep in mind that there are 5 different airlines that fly to Chicago Midway Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ontario to Chicago Midway Airport on average per week?
As of June 2025, 5 flights take off from Ontario and land in Chicago Midway Airport each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.
When to book flights from Ontario to Chicago Midway Airport
Cheap Ontario to Chicago Midway Airport (ONT to MDW) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Chicago Midway Airport
How far is Ontario to Chicago Midway by plane?
A flight from Ontario to Chicago Midway will travel around 1703.8 mi. Typically, this will take 6h 37m by plane in normal conditions.
When did momondo last update prices for flights from Ontario Airport to Chicago Midway Airport?
Prices for flights from Ontario Airport to Chicago Midway Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Chicago Midway Airport?
As of June 2025, there are 3 operators available to choose from for flights from Ontario Airport to Chicago Midway Airport.
How old do you have to be to fly from Ontario Airport to Chicago Midway Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Chicago Midway Airport.
What documentation or ID do you need to fly to Chicago Midway Airport?
The travel and health documents required for your trip to Chicago Midway Airport 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 Chicago Midway Airport. 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 Chicago Midway Airport?
momondo data reveals that the most frequently booked plane model on the route from Ontario to Chicago Midway Airport is Boeing 737 MAX 8, representing 22.40% of all bookings. The subsequent popular models are Airbus A321neo at 20.45%, Airbus A320neo at 9.42%, and Boeing 737-800 at 9.09%.
What is the most popular airline from Ontario to Chicago Midway Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Ontario to Chicago Midway Airport is Southwest (50% of total bookings). The next most popular airlines are Frontier (41%) and Delta (10%).
Best airlines flying from Ontario to Chicago Midway Airport
Compare and see reviews for airlines that fly from Ontario to Chicago Midway Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $128 | Free Cancellation | Rating 5.9 3,293 reviews | |||
| PriceFrom $237 | Free Cancellation | Rating 8.0 4,278 reviews | |||
| PriceFrom $256 | Free Cancellation | Rating 8.0 7,969 reviews |
Southwest Flights From Ontario to Chicago Midway Airport
Across 5 Southwest flights from Ontario to Chicago Midway Airport this week, the average price was $413, with the best Southwest deals starting from $237 round-trip. 4,278 users have rated Southwest on momondo, with an average score of 8.0/10.
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Why should I use momondo to find a flight deal from Ontario to Chicago?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Chicago. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Ontario to Chicago with flexible booking policies on momondo?
Yes. All flights to Chicago from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Ontario to Chicago?
Once you have performed a search for Ontario to Chicago 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 Chicago right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Ontario to Chicago 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.