Featured airlines
- Plan, book, fly with confidence
- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 30% on select hotels after you book a flight*
Cheap Flights from Ontario to Chicago (ONT-MDW)
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.
Frequently asked questions
Travel information
Travel information
Origin airport | Los Angeles - Ontario Intl. |
Destination airport | Midway Intl. |
Airlines serving | Delta, Frontier Airlines, Southwest Airlines |
Roundtrip price | $188 |
Distance | 1702 mi |
Book with confidence
Book with confidence
The cheapest times to fly from Ontario to Chicago
On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Chicago are during the month of May. You can find some of the cheapest flights from Ontario to Chicago with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Ontario to Chicago
Sunday is one of the best days to book for cheap flights from Ontario to Chicago: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.
How to find cheap round-trip tickets from Ontario to Chicago
Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Chicago in 2025. You can also book with separate airlines for your outbound and return journeys, from $114 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.
Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Chicago flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.
You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Chicago airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.
*Terms apply.
Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.
Be inspired and discover more with Expedia
Be inspired and discover more with Expedia
Flights
- Hawaiian Airlines
- Korean Air
- British Airways
- United
- Frontier Airlines
- Alaska Airlines
- Air Canada
- avianca
- Delta
- China Airlines
- Qatar Airways
- Aeromexico
- JetBlue Airways
- American Airlines
- Volaris
- Japan Airlines
- Delta Fort Lauderdale (FLL) to Chicago (MDW) flights
- Delta Newark Liberty Intl. Airport (EWR) to Chicago (MDW) flights
- Delta Boston (BOS) to Chicago (MDW) flights
- Alaska Airlines Ontario (ONT) to Portland (PDX) flights
- Alaska Airlines Ontario (ONT) to Seattle (SEA) flights
- Frontier Airlines Ontario (ONT) to Denver (DEN) flights
- American Airlines Ontario (ONT) to New York (JFK) flights
- American Airlines Ontario (ONT) to Phoenix (PHX) flights
- American Airlines Ontario (ONT) to Miami (MIA) flights
- Volaris Ontario (ONT) to Guadalajara (GDL) flights
- Delta Ontario (ONT) to Salt Lake City (SLC) flights
- American Airlines Ontario (ONT) to Newark Liberty Intl. Airport (EWR) flights
- Alaska Airlines Ontario (ONT) to Honolulu (HNL) flights
- Flights to Houston
- Flights to Los Angeles
- Flights to Honolulu
- Flights to Pigeon Forge
- Flights to Washington
- Flights to New Orleans
- Flights to Key West
- Flights to San Diego
- Flights to Nashville
- Flights to San Francisco
- Flights to Orlando
- Flights to Las Vegas
- Flights to Boston
- Flights to Atlanta
- Flights to Miami
- Flights to San Antonio
- Flights to Gatlinburg
- Flights to New York
- Flights to Chicago
- Flights to Fort Lauderdale
- Flights from Fullerton Municipal
- Flights from Hawthorne Municipal
- Flights from Long Beach Municipal
- Flights from French Valley
- Flights from Palmdale Regional
- Flights from Los Angeles Intl.
- Flights from John Wayne
- Flights from San Bernardino Intl.
- Flights from General William J. Fox Airfield
- Flights from Hollywood Burbank
- Flights from Boston (BOS) to Chicago (MDW)
- Flights from New York (LGA) to Chicago (MDW)
- Flights from Denver (DEN) to Chicago (MDW)
- Flights from Dallas (DFW) to Chicago (MDW)
- Flights from Tampa (TPA) to Chicago (MDW)
- Flights from Fort Lauderdale (FLL) to Chicago (MDW)
- Flights from Miami (MIA) to Chicago (MDW)
- Flights from San Diego (SAN) to Chicago (MDW)
- Flights from Dallas (DAL) to Chicago (MDW)
- Flights from Houston (IAH) to Chicago (MDW)
- Flights from Phoenix (PHX) to Chicago (MDW)
- Flights from Newark Liberty Intl. Airport (EWR) to Chicago (MDW)
- Flights from Ontario (ONT) to Portland (PDX)
- Flights from Los Angeles (LAX) to Seoul (ICN)
- Flights from Los Angeles (LAX) to Seattle (SEA)
- Flights from Ontario (ONT) to Seattle (SEA)
- Flights from Chicago (ORD) to Los Angeles (LAX)
- Flights from Atlanta (ATL) to Los Angeles (LAX)
- Flights from New York (NYC) to Los Angeles (LAX)
- Flights from San Francisco (SFO) to Los Angeles (LAX)
- Flights from Dallas (DFW) to Los Angeles (LAX)
- Flights from Seattle (SEA) to Los Angeles (LAX)
- Flights from Las Vegas (LAS) to Los Angeles (LAX)
- Flights from Ontario (ONT) to Denver (DEN)
- Flights from Los Angeles (LAX) to Bangkok (BKK)
- Flights from Dallas (DFW) to Chicago (ORD)
- Flights from Los Angeles (LAX) to Chicago (ORD)
- Flights from Ontario (ONT) to New York (JFK)
- Flights from San Francisco (SFO) to New York (JFK)
- Flights from Los Angeles (LAX) to Paris (CDG)
- Flights from Ontario (ONT) to Phoenix (PHX)
- Flights from Chicago (ORD) to Phoenix (PHX)
- Flights from Chicago (ORD) to Orlando (MCO)
- Flights from Los Angeles (LAX) to London (LHR)
- Flights from Los Angeles (LAX) to Miami (MIA)
- Flights from Ontario (ONT) to Miami (MIA)
- Flights from Chicago (ORD) to Miami (MIA)
- Flights from Los Angeles (LAX) to Tokyo (NRT)
- Flights from San Francisco (SFO) to Tokyo (NRT)
- Flights from Ontario (ONT) to Guadalajara (GDL)
- Flights from Ontario (ONT) to Manila (MNL)
- Flights from Los Angeles (LAX) to Manila (MNL)
- Flights from Ontario (ONT) to Salt Lake City (SLC)
- Flights from Los Angeles (LAX) to New York (NYC)
- Flights from Ontario (ONT) to Newark Liberty Intl. Airport (EWR)
- Flights from Los Angeles (LAX) to Honolulu (HNL)
- Flights from Ontario (ONT) to Honolulu (HNL)
- Flights from Los Angeles (LAX) to Dallas (DFW)
- Flights from Ontario (ONT) to Dallas (DAL)
- Flights from Chicago (ORD) to Las Vegas (LAS)
- Flights from Los Angeles (LAX) to Las Vegas (LAS)
- Flights from San Francisco (SFO) to Las Vegas (LAS)
- Flights from Los Angeles (LAX) to Cancun (CUN)
- Flights from Los Angeles (LAX) to San Francisco (SFO)