An airplane exhibit labeled "Concourse A" in an airport terminal.

CA $190 Cheap Flights from Ontario Intl. Airport (ONT) to Chicago (MDW)

View CA $190 flight on Sat, Sep 12, 2026Opens in a new window

Popular airlines from Ontario Intl. Airport (ONT) to Chicago Midway Airport (MDW)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap flights from Ontario Intl. Airport (ONT) to Chicago (MDW)

Prices were available within the past 7 days and start at CA $190 for one-way flights and CA $450 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Aug 27 - Thu, Sep 3
ONT
Ontario
MDW
Chicago
CA $450 Roundtrip, found 19 hours ago
CA $450
Roundtrip
found 19 hours ago
Select Delta flight, departing Thu, Aug 27 from Ontario to Chicago, returning Thu, Sep 3, priced at CA $450 found 19 hours ago
Delta
Thu, Aug 27 - Thu, Sep 3
ONT
Ontario
MDW
Chicago
CA $520 Roundtrip, found 19 hours ago
CA $520
Roundtrip
found 19 hours ago
Select Delta flight, departing Thu, Aug 27 from Ontario to Chicago, returning Thu, Sep 3, priced at CA $520 found 19 hours ago
Delta
Thu, Aug 27 - Thu, Sep 3
ONT
Ontario
MDW
Chicago
CA $521 Roundtrip, found 19 hours ago
CA $521
Roundtrip
found 19 hours ago
Select Delta flight, departing Thu, Aug 27 from Ontario to Chicago, returning Thu, Sep 3, priced at CA $521 found 19 hours ago
Delta
Thu, Aug 27 - Thu, Sep 3
ONT
Ontario
MDW
Chicago
CA $570 Roundtrip, found 19 hours ago
CA $570
Roundtrip
found 19 hours ago
Select Delta flight, departing Thu, Aug 27 from Ontario to Chicago, returning Thu, Sep 3, priced at CA $570 found 19 hours ago
Delta
Thu, Aug 27 - Thu, Sep 3
ONT
Ontario
MDW
Chicago
CA $591 Roundtrip, found 19 hours ago
CA $591
Roundtrip
found 19 hours ago
Select Delta flight, departing Thu, Aug 27 from Ontario to Chicago, returning Thu, Sep 3, priced at CA $591 found 19 hours ago
Delta
Fri, Aug 28 - Fri, Sep 4
ONT
Ontario
MDW
Chicago
CA $605 Roundtrip, found 5 hours ago
CA $605
Roundtrip
found 5 hours ago
Select Delta flight, departing Fri, Aug 28 from Ontario to Chicago, returning Fri, Sep 4, priced at CA $605 found 5 hours ago
Delta
Thu, Aug 27 - Thu, Sep 3
ONT
Ontario
MDW
Chicago
CA $640 Roundtrip, found 19 hours ago
CA $640
Roundtrip
found 19 hours ago
Select Delta flight, departing Thu, Aug 27 from Ontario to Chicago, returning Thu, Sep 3, priced at CA $640 found 19 hours ago
Delta
Thu, Aug 27 - Thu, Sep 3
ONT
Ontario
MDW
Chicago
CA $647 Roundtrip, found 19 hours ago
CA $647
Roundtrip
found 19 hours ago
Select Delta flight, departing Thu, Aug 27 from Ontario to Chicago, returning Thu, Sep 3, priced at CA $647 found 19 hours ago
Delta
Fri, Aug 28 - Fri, Sep 4
ONT
Ontario
MDW
Chicago
CA $676 Roundtrip, found 5 hours ago
CA $676
Roundtrip
found 5 hours ago
Select Delta flight, departing Fri, Aug 28 from Ontario to Chicago, returning Fri, Sep 4, priced at CA $676 found 5 hours ago
Delta
Fri, Aug 28 - Fri, Sep 4
ONT
Ontario
MDW
Chicago
CA $682 Roundtrip, found 5 hours ago
CA $682
Roundtrip
found 5 hours ago
Select Delta flight, departing Fri, Aug 28 from Ontario to Chicago, returning Fri, Sep 4, priced at CA $682 found 5 hours ago

Alternative airports near Chicago

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to O'Hare Intl. ORD. Cheapest option available. Average driving time to city centre is 23 minutes. Flights from CA $864
ORD
O'Hare Intl.
Cheapest
Average driving time to city centre23 min
Flights from CA $864

Find the cheapest month to fly from Ontario (ONT) to Chicago (MDW)

April is typically the cheapest month to fly

From CA $336 - CA $739 per traveller.

Frequently asked questions

How much does a flight from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) cost?
You can find one-way and return flights from ONT to MDW with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when ONT to MDW ticket fares go up or down.
What is the cheapest month to fly from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
September is typically the cheapest month to fly from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.), with average return fares around CA$527. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other cheap months to fly from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) include February and May.
Which airlines fly direct from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
Only one airline offers direct flights from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.). Southwest Airlines operates 7 direct flights from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) every week.
What is the cheapest airline that flies from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
Southwest Airlines is one of the cheapest airlines offering nonstop return flights from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.), with tickets starting from around CA$274 for flights that can be booked for departure within the next year. Frontier Airlines offers one of the cheapest connecting return flights on this route, with tickets starting from around CA$548. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
To find a cheap flight from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
The best airline to fly with from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
The best time to fly from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) is typically September or May. These months offer a great balance—prices are reasonable at around CA$527 for a return flight, and you'll have plenty of flight options since they're popular times to travel. September brings pleasant early autumn weather, while May offers comfortable spring temperatures. If you're flexible, these months give you both affordable fares and excellent flight schedules to work with.
How many flights per day from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
There is 1 nonstop flight per day from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.). For even more choices, look at flights that include layovers, as there are around 51 connecting flights per day. Some common connection points include Harry Reid Intl. (LAS), Sky Harbor Intl. (PHX), and Denver Intl. (DEN).
What is the earliest flight from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
The earliest flight from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) typically departs around 1:55 AM local time. This flight is operated by Frontier Airlines. This is a seasonal service, active in November. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
You'll find the most flights from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) on a Thursday, with around 31 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Southwest Airlines, Delta, and United. Flight schedules are fairly consistent throughout the week, so you'll have plenty of options no matter when you choose to fly.
What are the most popular departure times for flights from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
The most popular departure times for flights from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) are in the morning, from 6am to 9am. Many major carriers, including Southwest Airlines, Delta and Frontier Airlines, offer flights during this window. Many travellers prefer these early morning flights as they allow you to arrive at your destination with plenty of time to start your day.
How long does it take to fly from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
Flying from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) covers a distance of approximately 2739 kilometres. A nonstop flight typically takes around 3 hours 45 minutes. If you opt for a flight with one stop, your travel time will be longer, usually around 6 hours. Flights with two or more stops generally take about 10 hours 30 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
You can fly business class or first class between ONT and MDW. You can fly business class with Delta.First class cabins are available on Delta.
How do I earn miles on a Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) flight with Expedia?
It's easy to earn miles on a Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Chicago, IL (MDW) from Ontario Intl. Airport (ONT)?
If you're planning to travel to Chicago from Los Angeles - Ontario Intl. (ONT), you can fly directly into Midway Intl. (MDW). Some flights may connect through major hubs like Harry Reid International Airport (LAS), Sky Harbor Intl. (PHX), or Denver Intl. (DEN) before reaching Chicago. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) at the last minute?
Typically, booking a last minute flight from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) flight and hotel package?
Securing a Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.)?
If you booked your Ontario Intl. Airport (ONT) to Chicago, IL (MDW-Midway Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Ontario Intl. Airport
Destination airport
Midway Intl.
Airlines serving
Delta
Roundtrip price
CA $449
Distance
2723 km
Average flight time
5 hours 47 mins

Book with confidence

Los Angeles to Chicago Flights

The easy way to book your flights from Ontario Intl. Airport to Chicago 

With Expedia, it’s simple to find and book flights to Chicago from Ontario Intl. Airport whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Midway Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Ontario Intl. Airport to Chicago today, tomorrow, or this week.  

 

Save dollars with cheap flights from Ontario Intl. Airport, ONT to Midway Intl., MDW 

Sort your search results by price to find great deals on your flight from Ontario Intl. Airport to Chicago—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Chicago from Ontario Intl. Airport currently is just CA $450 rising to CA $682.  

Here are more money-saving tips: 

  • Fly in August when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Chicago  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Chicago from Ontario Intl. Airport 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Chicago with Expedia today.

Los Angeles to Chicago Flights

Explore a world of travel with Expedia

*Available to Expedia members.