$114 Cheap Flights from Chicago (MDW) to Ontario (ONT)

View $114 flight on Tue, Jul 1, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Chicago to Ontario (MDW-ONT)

Prices were available within the past 7 days and start at $114 for one-way flights and $188 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, May 31 - Tue, Jun 3
MDW
Chicago
ONT
Ontario
$188 Roundtrip, found 1 day ago
$188
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, May 31 from Chicago to Ontario, returning Tue, Jun 3, priced at $188 found 1 day ago
Frontier Airlines
Mon, May 12 - Sat, May 17
MDW
Chicago
ONT
Ontario
$198 Roundtrip, found 23 hours ago
$198
Roundtrip
found 23 hours ago
Select Frontier Airlines flight, departing Mon, May 12 from Chicago to Ontario, returning Sat, May 17, priced at $198 found 23 hours ago
Frontier Airlines
Fri, May 30 - Fri, Jun 6
MDW
Chicago
ONT
Ontario
$208 Roundtrip, found 6 hours ago
$208
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Fri, May 30 from Chicago to Ontario, returning Fri, Jun 6, priced at $208 found 6 hours ago
Frontier Airlines
Sun, Jun 1 - Mon, Jun 9
MDW
Chicago
ONT
Ontario
$210 Roundtrip, found 2 days ago
$210
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sun, Jun 1 from Chicago to Ontario, returning Mon, Jun 9, priced at $210 found 2 days ago
Southwest Airlines
Fri, Jun 6 - Mon, Jun 9
MDW
Chicago
ONT
Ontario
$218 Roundtrip, found 6 hours ago
$218
Roundtrip
found 6 hours ago
Select Southwest Airlines flight, departing Fri, Jun 6 from Chicago to Ontario, returning Mon, Jun 9, priced at $218 found 6 hours ago
Frontier Airlines
Fri, Jun 6 - Sat, Jun 7
MDW
Chicago
ONT
Ontario
$218 Roundtrip, found 8 hours ago
$218
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Fri, Jun 6 from Chicago to Ontario, returning Sat, Jun 7, priced at $218 found 8 hours ago
Southwest Airlines
Wed, Jun 11 - Sun, Jun 15
MDW
Chicago
ONT
Ontario
$227 Roundtrip, found 9 hours ago
$227
Roundtrip
found 9 hours ago
Select Southwest Airlines flight, departing Wed, Jun 11 from Chicago to Ontario, returning Sun, Jun 15, priced at $227 found 9 hours ago
Frontier Airlines
Thu, Jun 5 - Mon, Jun 9
MDW
Chicago
ONT
Ontario
$228 Roundtrip, just found
$228
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Jun 5 from Chicago to Ontario, returning Mon, Jun 9, priced at $228 just found
Southwest Airlines
Sun, Jun 1 - Thu, Jun 5
MDW
Chicago
ONT
Ontario
$237 Roundtrip, found 1 hour ago
$237
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Sun, Jun 1 from Chicago to Ontario, returning Thu, Jun 5, priced at $237 found 1 hour ago
Delta
Tue, Jul 1 - Sat, Jul 5
MDW
Chicago
ONT
Ontario
$257 Roundtrip, just found
$257
Roundtrip
just found
Select Delta flight, departing Tue, Jul 1 from Chicago to Ontario, returning Sat, Jul 5, priced at $257 just found

Frequently asked questions

How much does a flight from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Book cheap return flights starting from $197 from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines and Frontier Airlines flight leaving MDW on May 14 2025 and touching down at ONT. The price was last updated on April 23 2025 and has not changed since.
What is the cheapest month to fly from MDW to ONT?
The cheapest flights from MDW to ONT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT)?
Catch a direct flight with Southwest Airlines and fly straight from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT).
What is the cheapest airline that flies from MDW to ONT?
Take off from MDW to ONT with Southwest Airlines. This airline currently offers the cheapest one-way fare on this route, starting from $114. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from MDW on July 1 2025. Prices were last updated on April 23 2025 and have not changed since.
How many flights per day from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT)?
On average, there are 6 nonstop flights flying from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT) per week. If you can’t find one that fits your travel plans, consider a flight with a layover. Customize your search on Expedia to include one or two stops and choose the next best option.
What are the most popular departure times for flights from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT)?
The 9 AM departures from MDW to ONT are the top choice for many travelers. Greater demand means you’ll likely pay more for these departures. If you want to save on your trip, book during off-peak hours.
What day of the week has the most flights from MDW to ONT?
Fly on a Friday if you’re after the largest selection of flights from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT).
What is the earliest flight from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT)?
Midway Intl. Airport (MDW)’s first flight to Los Angeles - Ontario Intl. Airport (ONT) leaves at approximately 9:00AM UTC-6. With a travel time of 4h 30m, you’ll touch down at around 11:30AM UTC-8.
How long does it take to fly from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT)?
Typically, it takes 4 hours and 31 minutes to fly the 1,700 mi from MDW to ONT.
What airline has the least delays from MDW to ONT?
Consider booking with Southwest Airlines if you’d like to fly straight from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT) without any delays. This airline has the strongest track record for punctuality, with an on-time score of 83%. Want to be notified if anything changes? You can check your flight status using the Expedia App.
What is the best time to fly from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT)?
To avoid possible delays on the Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT) route, travel before 3 PM. Departures after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Ontario from Midway Intl. Airport (MDW)?
Midway Intl. Airport (MDW) offers direct flights to Ontario. Here are some of the airports you can fly to without stops:

  • Los Angeles Intl. Airport (LAX)
  • Long Beach Municipal Airport (LGB)
  • Los Angeles - Ontario Intl. Airport (ONT)

Is it cheaper to buy a plane ticket from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Last-minute bookings from MDW to ONT are typically more expensive. For the cheapest rates, start looking for flights ahead of time. That being said, if you can play around with your travel dates, it’s possible to find a cheap fare just before your departure.
Is it cheaper to book a MDW to ONT flight and hotel package?
Compared with arranging hotels and flights separately, booking a MDW to ONT flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place will take the stress out of planning your trip. Just pick your flights and choose from our wide range of stays, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Midway Intl. Airport (MDW) to Los Angeles - Ontario Intl. Airport (ONT)?
In most cases, you’re able to cancel or reschedule your MDW to ONT flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline’s fees and guidelines on flight changes, or if you want further details, visit our Customer Service portal.
*Available to One Key members.