Cheap flights from Chicago (CHI) to Ontario (ONT) from $63
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
CHI — ONT
May 8 — May 151
From?
To?
1 adult, Economy
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The best prices from Chicago to Ontario are usually found in May or March, booked 22 days in advance, depart on a Thursday or Friday and return on a Wednesday
Cheap flight deals from Chicago to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 3, 2024.
Popular in | July |
|---|---|
Cheapest in | May |
Round-trip from | $238 |
One-way from | $63 |
What is the cheapest day to fly round-trip from Chicago to Ontario?
Wednesday is generally a great day to depart. Flying on this day could help you save up to 44%.
How far in advance should I book a flight from Chicago to Ontario?
Find a great deal and save up to 54% by booking at least 49 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Chicago to Ontario within the next two weeks, with the cheapest ticket starting at $277.
What is the cheapest month to fly from Chicago to Ontario?
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, January can be a great choice for travel to Ontario. Flights to Ontario from Chicago in January are about $296 on average during January, but can be found for as low as $90.
When is the cheapest time to fly from Chicago to Ontario (CHI - ONT)?
Unlike at noon, when flights are generally more expensive, you can save up to 35% on flights from Chicago to Ontario by exploring options for tickets in the evening.
Cheap Delta flights from Chicago to Ontario
Explore cheap flight options specifically provided by Delta for the route between Chicago and Ontario. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 3, 2024.
Find some of the cheapest Delta flights traveling from Chicago to Ontario. Make sure to double check the flight details before booking.
Tue 6/46:07 amORD - ONT
2 stops12h 29mDelta
Tue 6/1110:00 pmONT - ORD
2 stops12h 35mDelta
Deal found 5/2$246
Wed 5/295:23 pmORD - ONT
2 stops8h 20mDelta
Tue 6/411:22 amONT - ORD
1 stop10h 44mDelta
Deal found 5/2$251
Wed 6/57:30 pmORD - ONT
1 stop6h 13mDelta
Wed 6/125:00 pmONT - ORD
2 stops12h 32mDelta
Deal found 5/2$272
Sat 5/185:40 amORD - ONT
1 stop8h 00mDelta
Sat 5/255:45 amONT - ORD
2 stops9h 04mDelta
Deal found 5/3$284
Sat 5/255:15 pmORD - ONT
1 stop6h 24mDelta
Sun 6/210:00 pmONT - ORD
2 stops9h 20mDelta
Deal found 5/2$289
Fri 5/3111:45 amORD - ONT
2 stops10h 21mDelta
Sat 6/16:00 amONT - ORD
2 stops12h 55mDelta
Deal found 5/1$294
Sat 5/115:15 pmORD - ONT
1 stop6h 24mDelta
Sat 5/181:20 pmONT - ORD
1 stop6h 38mDelta
Deal found 5/3$322
Wed 5/87:45 amORD - ONT
1 stop6h 28mDelta
Thu 5/166:00 amONT - ORD
2 stops12h 55mDelta
Deal found 5/3$327
Wed 5/81:45 pmORD - ONT
2 stops10h 53mDelta
Thu 5/166:00 amONT - ORD
2 stops12h 55mDelta
Deal found 5/3$332
Cheap Frontier flights from Chicago to Ontario
Explore cheap flight options specifically provided by Frontier for the route between Chicago and Ontario. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 3, 2024.
Browse through some of the cheapest Frontier flights traveling from Chicago to Ontario. Check back soon if you're not seeing flights that suit your needs.
Sat 5/1110:59 pmMDW - ONT
1 stop10h 04mFrontier
Sat 5/1810:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$133
Sat 5/189:05 pmMDW - ONT
1 stop12h 24mFrontier
Sat 5/2510:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$137
Sat 6/111:40 amORD - ONT
1 stop6h 22mFrontier
Wed 6/56:06 pmONT - ORD
1 stop9h 17mFrontier
Deal found 5/3$138
Sat 5/187:59 pmORD - ONT
1 stop13h 30mFrontier
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/3$139
Tue 8/137:30 pmORD - ONT
1 stop24h 39mFrontier
Tue 8/2712:49 amONT - ORD
1 stop22h 14mFrontier
Deal found 5/3$140
Sat 5/1110:59 pmMDW - ONT
1 stop10h 04mFrontier
Sat 5/1810:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$141
Sat 5/257:59 pmORD - ONT
1 stop13h 30mFrontier
Tue 5/2810:42 pmONT - ORD
1 stop28h 18mFrontier
Deal found 5/1$142
Sat 5/119:29 pmMDW - ONT
1 stop11h 02mFrontier
Sat 5/185:41 pmONT - MDW
1 stop10h 09mFrontier
Deal found 5/3$143
Sat 5/119:29 pmMDW - ONT
1 stop11h 02mFrontier
Sat 5/185:41 pmONT - MDW
1 stop10h 09mFrontier
Deal found 5/3$144
Cheap Chicago to Ontario flights in May & June 2024
Find cheap flight options from Chicago to Ontario specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,864,334 searches. Prices were last updated on May 3, 2024.
Check out some of the best flight deals from Chicago to Ontario in 2024. For more flight deals, be sure to check back very soon.
Tue 5/217:59 pmORD - ONT
1 stop15h 05mFrontier
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/3$118
Sat 5/1110:59 pmMDW - ONT
1 stop10h 04mFrontier
Sat 5/1810:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$133
Tue 5/217:59 pmORD - ONT
1 stop15h 05mFrontier
Tue 5/2810:42 pmONT - ORD
1 stop28h 18mFrontier
Deal found 5/3$137
Sat 5/189:05 pmMDW - ONT
1 stop12h 24mFrontier
Sat 5/2510:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$137
Sat 6/111:40 amORD - ONT
1 stop6h 22mFrontier
Wed 6/56:06 pmONT - ORD
1 stop9h 17mFrontier
Deal found 5/3$138
Sat 5/189:05 pmMDW - ONT
1 stop12h 24mFrontier
Sat 5/2510:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$138
Sat 5/187:59 pmORD - ONT
1 stop13h 30mFrontier
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/3$139
Tue 5/1410:55 pmMDW - ONT
1 stop9h 31mFrontier
Tue 5/212:25 pmONT - MDW
1 stop18h 44mFrontier
Deal found 5/3$139
Tue 5/217:59 pmORD - ONT
1 stop15h 05mFrontier
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/3$140
Chicago to Ontario 2024 flight deals
Discover exclusive flight deals for travel between Chicago and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 3, 2024.
Check out some of the best flight deals from Chicago to Ontario in 2024. For more flight deals, be sure to check back very soon.
Tue 5/217:59 pmORD - ONT
1 stop15h 05mFrontier
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/3$118
Sat 5/1110:59 pmMDW - ONT
1 stop10h 04mFrontier
Sat 5/1810:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$133
Tue 5/217:59 pmORD - ONT
1 stop15h 05mFrontier
Tue 5/2810:42 pmONT - ORD
1 stop28h 18mFrontier
Deal found 5/3$137
Sat 5/189:05 pmMDW - ONT
1 stop12h 24mFrontier
Sat 5/2510:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$137
Sat 6/111:40 amORD - ONT
1 stop6h 22mFrontier
Wed 6/56:06 pmONT - ORD
1 stop9h 17mFrontier
Deal found 5/3$138
Sat 5/189:05 pmMDW - ONT
1 stop12h 24mFrontier
Sat 5/2510:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$138
Sat 5/187:59 pmORD - ONT
1 stop13h 30mFrontier
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/3$139
Tue 5/1410:55 pmMDW - ONT
1 stop9h 31mFrontier
Tue 5/212:25 pmONT - MDW
1 stop18h 44mFrontier
Deal found 5/3$139
Tue 8/137:30 pmORD - ONT
1 stop24h 39mFrontier
Tue 8/2712:49 amONT - ORD
1 stop22h 14mFrontier
Deal found 5/3$140
Non-stop flights to Ontario from Chicago
Discover non-stop flight options from Chicago to Ontario. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 3, 2024.
For a quicker trip, book one of these direct flights from Chicago to Ontario. Users can also choose from other Chicago to Ontario flights by using the search form above.
Tue 6/182:35 pmMDW - ONT
Nonstop4h 05mSouthwest
Thu 6/209:55 amONT - MDW
Nonstop3h 45mSouthwest
Deal found 5/3$612
Mon 5/1312:55 pmMDW - ONT
Nonstop4h 10mSouthwest
Thu 5/167:50 amONT - MDW
Nonstop3h 45mSouthwest
Deal found 5/3$1,246
Chicago to Ontario flights leaving soon
Find last-minute flight options from Chicago to Ontario for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 3, 2024.
Book one of these great deals on flights from Chicago to Ontario. Tip: verify your flight details before completing your reservation.
Sat 5/1110:59 pmMDW - ONT
1 stop10h 04mFrontier
Sat 5/1810:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$133
Sat 5/1110:59 pmMDW - ONT
1 stop10h 04mFrontier
Sat 5/1810:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 5/3$141
Sat 5/119:29 pmMDW - ONT
1 stop11h 02mFrontier
Sat 5/185:41 pmONT - MDW
1 stop10h 09mFrontier
Deal found 5/3$143
Sat 5/119:29 pmMDW - ONT
1 stop11h 02mFrontier
Sat 5/185:41 pmONT - MDW
1 stop10h 09mFrontier
Deal found 5/3$144
Sat 5/116:27 pmORD - ONT
1 stop14h 04mFrontier
Sat 5/185:41 pmONT - ORD
1 stop9h 19mFrontier
Deal found 5/3$153
Mon 5/1310:59 pmMDW - ONT
1 stop14h 21mFrontier
Tue 5/212:25 pmONT - MDW
1 stop18h 44mFrontier
Deal found 5/3$153
Sat 5/116:27 pmORD - ONT
1 stop14h 04mFrontier
Sat 5/185:41 pmONT - ORD
1 stop9h 19mFrontier
Deal found 5/3$154
Fri 5/1010:59 pmMDW - ONT
1 stop24h 59mFrontier
Tue 5/147:16 amONT - MDW
1 stop26h 22mFrontier
Deal found 5/3$158
Sun 5/1210:27 pmMDW - ONT
1 stop9h 59mFrontier
Mon 5/1312:59 amONT - MDW
1 stop8h 39mFrontier
Deal found 5/3$159
One-way flights to Ontario from Chicago
Search for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 3, 2024.
Users in need of a one-way flight from Chicago to Ontario can choose from these deals. Users needing a return flight from Chicago to Ontario should utilize the search form above.
Tue 5/212:45 pmMDW - ONT
1 stop11h 14mFrontier
Deal found 5/3$63
Tue 6/42:45 pmMDW - ONT
1 stop11h 14mFrontier
Deal found 5/3$64
Sat 6/85:40 amMDW - ONT
1 stop20h 17mFrontier
Deal found 5/3$68
Sat 6/111:40 amORD - ONT
1 stop6h 22mFrontier
Deal found 5/2$70
Tue 8/276:00 amMDW - ONT
1 stop8h 32mFrontier
Deal found 5/2$70
Sat 8/315:56 pmORD - ONT
1 stop7h 48mFrontier
Deal found 5/2$71
Sat 8/3111:32 amMDW - ONT
1 stop6h 26mFrontier
Deal found 5/2$71
Thu 8/228:00 amORD - ONT
1 stop6h 15mFrontier
Deal found 5/3$73
Tue 5/145:01 amMDW - ONT
1 stop10h 00mFrontier
Deal found 5/3$73
Find flights from Chicago to Ontario within your budget
Customize your flight search to find flights from Chicago to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 3, 2024.
Fly from
Any airport
Fly to
Any airport
Budget
$137 - $288
Route
Depart
Return
Price
Chicago MidwayOntario
MDW - ONT
MDWONT
Chicago Midway
Sat 5/18
1 stop12h 24m
Ontario
Sat 5/25
1 stop5h 40m
$137
Chicago O'Hare IntlOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sat 6/1
1 stop6h 22m
Ontario
Wed 6/5
1 stop9h 17m
$138
Chicago MidwayOntario
MDW - ONT
MDWONT
Chicago Midway
Sat 5/18
1 stop12h 24m
Ontario
Sat 5/25
1 stop5h 40m
$138
Chicago O'Hare IntlOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sat 5/18
1 stop13h 30m
Ontario
Wed 5/22
1 stop8h 38m
$139
Chicago MidwayOntario
MDW - ONT
MDWONT
Chicago Midway
Tue 5/14
1 stop9h 31m
Ontario
Tue 5/21
1 stop18h 44m
$139
Chicago O'Hare IntlOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Tue 8/13
1 stop24h 39m
Ontario
Tue 8/27
1 stop22h 14m
$140
Chicago O'Hare IntlOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Tue 6/4
2 stops12h 29m
Ontario
Tue 6/11
2 stops12h 35m
$246
Chicago O'Hare IntlOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sat 6/1
2 stops13h 14m
Ontario
Sat 6/8
1 stop8h 22m
$266
Chicago O'Hare IntlOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Wed 7/3
1 stop12h 32m
Ontario
Wed 8/7
1 stop6h 44m
$288
When is the best time to book a flight from Chicago to Ontario?
Use this chart to determine the optimal time to book a round-trip flight from Chicago to Ontario. Price data was last updated on May 3, 2024.
Booking 22 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
When is the cheapest time to fly from Chicago to Ontario?
Use this chart to determine the cheapest time to fly round-trip from Chicago to Ontario. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Chicago to Ontario flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Average price of flights to Ontario by month
Plan your trip from Chicago to Ontario by taking into account the cheapest months to travel. The average price of a one-way flight from Chicago to Ontario is currently $69 while a round-trip flight costs $181. Price data was last updated on April 28, 2024.
Currently, October is the cheapest month in which you can book a flight from Chicago to Ontario (average of $237). Flying from Chicago to Ontario in June is currently the most expensive (average of $341). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
January
$268
February
$287
March
$281
April
$256
May
$268
June
$341
July
$336
August
$287
September
$258
October
$237
November
$268
December
$271
Temperature and rainfall in Ontario by month
Plan your trip to Ontario by taking into account the average temperature and rainfall totals by month.
LAX Temperature | 57.2 - 73.4 °F |
|---|
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated May 3, 2024.
Peruse reviews from past customers who have flown with Delta, Frontier and Alaska Airlines from Chicago to Ontario to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
6,099 reviews
Comfort
8.1
Crew
8.7
Entertainment
7.8
Boarding
8.3
Food
7.3
Overall
8.2
Reviews
1 / 10
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
Southwest
6,099 reviews
Southwest
6,099 reviews
Comfort
8.1
Crew
8.7
Entertainment
7.8
Boarding
8.3
Food
7.3
Overall
8.2
Reviews
1 / 10
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
9,128 reviews
Southwest
6,099 reviews
Comfort
8.1
Crew
8.7
Entertainment
7.8
Boarding
8.3
Food
7.3
Overall
8.2
Reviews
1 / 10
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
10,848 reviews
Southwest
6,099 reviews
Comfort
8.1
Crew
8.7
Entertainment
7.8
Boarding
8.3
Food
7.3
Overall
8.2
Reviews
1 / 10
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
3,867 reviews
Southwest
6,099 reviews
Comfort
8.1
Crew
8.7
Entertainment
7.8
Boarding
8.3
Food
7.3
Overall
8.2
Reviews
1 / 10
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
14,755 reviews
Southwest
6,099 reviews
Comfort
8.1
Crew
8.7
Entertainment
7.8
Boarding
8.3
Food
7.3
Overall
8.2
Reviews
1 / 10
I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.
Related info for your journey
Find useful and relevant information for your journey from Chicago to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Chicago to OntarioSee prices for flight routes from nearby airports that may be better suited for you.
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Chicago to Ontario
Discover the top 5 airlines that operate flights from Chicago to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 3, 2024.
Search flights from Chicago to Ontario by cabin class
Find flights from Chicago to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Hourly flight availability from Chicago to Ontario
Find hourly flight availability from Chicago to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 3, 2024.
| 0%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 100%of flight departures | Morning6 am to noon |
| 0%of flight departures | AfternoonNoon to 6 pm |
| 0%of flight departures | Evening6 pm to midnight |
Midnight
6 AM
Noon
6 PM
Weekly flight availability from Chicago to Ontario
Explore weekly flight availability from Chicago to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 3, 2024.
| Sunday | 1daily flight |
|---|---|
| Monday | 3daily flights |
| Tuesday | 3daily flights |
| Wednesday | 3daily flights |
| Thursday | 3daily flights |
| Friday | 3daily flights |
| Saturday | 3daily flights |
Book a flight to one of these trending destinations
User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Chicago to Ontario?
Deals for Chicago to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from Chicago to Ontario?
It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Chicago to Ontario.
Can Cheapflights find flights from Chicago to Ontario with no change fees?
Yes, we can. To see specific flights from Chicago to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from Chicago to Ontario become cheaper?
Not ready to book yet? You can track prices for flights from Chicago to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.