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Cheap flights from Ontario (ONT) to Chicago (CHI) from $45

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 5/15. 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.
ONT — CHI
Apr 28 — May 51
From?
To?
Sun 4/28
Sun 5/5
1 adult, Economy
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The best prices from Ontario to Chicago are usually found in April or November, booked 71 days in advance, depart on a Thursday or Saturday and return on a Thursday

Cheap flight deals from Ontario to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Chicago (CHI). 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 April 23, 2024.

Popular in

July

Cheapest in

April

Round-trip from

$222

One-way from

$45
High demand for flights, 28% potential price rise
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Best time to find cheap flights, 29% potential price drop
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From Ontario to Chicago (CHI)
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One-way flight from Ontario to Chicago (CHI)
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What is the cheapest day to fly round-trip from Ontario to Chicago?

Departing on a Wednesday is a good option for securing a great price. You can expect to save up to 22% when planning your travel around this day of the week.

How far in advance should I book a flight from Ontario to Chicago?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 46 days in advance, which can save you up to 79% on flights from Ontario to Chicago compared to booking the week you need them. Waiting 46 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $297. For sooner than that we have options available in the next 3 days from $499.

What is the cheapest month to fly from Ontario to Chicago?

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 Chicago. Flights to Chicago from Ontario in January are about $302 on average during January, but can be found for as low as $93.

When is the cheapest time to fly from Ontario to Chicago (ONT - CHI)?

Unlike at noon, when flights are generally more expensive, you can save up to 24% on flights from Ontario to Chicago by exploring options for tickets in the afternoon.

Cheap American Airlines flights from Ontario to Chicago

Explore cheap flight options specifically provided by American Airlines for the route between Ontario and Chicago. 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 3,086,534 searches. Data last updated April 23, 2024.
Peruse some of the lowest-priced American Airlines flights we've found from Ontario to Chicago. Make sure to check back often as deals are often changing.
Tue 5/217:40 pmONT - ORD
1 stop7h 36mAmerican Airlines
Tue 5/287:25 amORD - ONT
1 stop6h 22mAmerican Airlines
Deal found 4/23$220
Fri 4/2610:20 pmONT - ORD
1 stop8h 35mAmerican Airlines
Sun 4/281:20 pmORD - ONT
1 stop9h 22mAmerican Airlines
Deal found 4/22$309
Wed 5/110:00 amONT - ORD
2 stops11h 08mAmerican Airlines
Sun 5/510:39 amORD - ONT
2 stops10h 10mAmerican Airlines
Deal found 4/22$768
Mon 5/66:21 amONT - ORD
1 stop7h 37mAmerican Airlines
Mon 5/66:40 pmORD - ONT
1 stop7h 16mAmerican Airlines
Deal found 4/22$781

Cheap Delta flights from Ontario to Chicago

Explore cheap flight options specifically provided by Delta for the route between Ontario and Chicago. 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 3,086,534 searches. Data last updated April 23, 2024.
Browse through some of the cheapest Delta flights traveling from Ontario to Chicago. Check back soon if you're not seeing flights that suit your needs.
Tue 6/112:15 pmONT - ORD
1 stop7h 41mDelta
Wed 6/192:10 pmORD - ONT
1 stop10h 28mDelta
Deal found 4/21$266
Fri 5/1010:00 pmONT - ORD
2 stops12h 42mDelta
Tue 5/145:40 amORD - ONT
1 stop8h 00mDelta
Deal found 4/22$279
Tue 4/3012:35 pmONT - ORD
1 stop9h 17mDelta
Thu 5/211:45 amORD - ONT
2 stops13h 17mDelta
Deal found 4/23$317
Tue 4/305:45 amONT - ORD
2 stops8h 50mDelta
Thu 5/211:45 amORD - ONT
2 stops13h 17mDelta
Deal found 4/23$322
Fri 4/2610:00 pmONT - ORD
2 stops8h 49mDelta
Fri 7/127:20 pmORD - ONT
1 stop6h 23mDelta
Deal found 4/22$370
Wed 5/112:35 pmONT - ORD
1 stop9h 17mDelta
Mon 5/611:45 amORD - ONT
2 stops13h 17mDelta
Deal found 4/23$400
Wed 5/15:45 amONT - ORD
2 stops13h 36mDelta
Thu 5/211:45 amORD - ONT
2 stops13h 17mDelta
Deal found 4/23$405
Thu 5/22:00 pmONT - ORD
1 stop7h 58mDelta
Mon 5/65:25 pmORD - ONT
2 stops8h 34mDelta
Deal found 4/22$410
Sun 4/2810:00 pmONT - ORD
1 stop8h 19mDelta
Wed 5/15:25 pmORD - ONT
2 stops8h 34mDelta
Deal found 4/21$490

Cheap Ontario to Chicago flights in April & May 2024

Find cheap flight options from Ontario to Chicago specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,086,534 searches. Prices were last updated on April 23, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to Chicago in 2024. More deals are always being added, so be sure to check back regularly.
Mon 5/1312:59 amONT - MDW
1 stop8h 39mFrontier
Wed 5/225:01 amMDW - ONT
1 stop10h 33mFrontier
Deal found 4/22$88
Sat 5/187:04 amONT - MDW
1 stop12h 34mFrontier
Wed 5/225:01 amMDW - ONT
1 stop10h 33mFrontier
Deal found 4/22$89
Tue 5/147:16 amONT - MDW
1 stop12h 49mFrontier
Thu 5/1610:22 pmMDW - ONT
1 stop27h 37mFrontier
Deal found 4/22$90
Mon 5/2012:59 amONT - MDW
1 stop14h 13mFrontier
Wed 5/225:01 amMDW - ONT
1 stop10h 33mFrontier
Deal found 4/23$93
Tue 5/147:16 amONT - MDW
1 stop12h 49mFrontier
Fri 5/179:10 pmMDW - ONT
1 stop13h 54mFrontier
Deal found 4/22$99
Tue 5/712:59 amONT - MDW
1 stop8h 39mFrontier
Tue 5/216:00 amMDW - ONT
1 stop9h 24mFrontier
Deal found 4/22$100
Sat 5/1810:10 pmONT - MDW
1 stop5h 40mFrontier
Mon 5/209:10 pmMDW - ONT
1 stop13h 54mFrontier
Deal found 4/22$101
Mon 5/612:59 amONT - MDW
1 stop8h 39mFrontier
Mon 5/135:30 amMDW - ONT
1 stop26h 56mFrontier
Deal found 4/22$102
Wed 5/812:39 pmONT - MDW
1 stop20h 57mFrontier
Mon 5/1310:59 pmMDW - ONT
1 stop10h 04mFrontier
Deal found 4/22$103

Ontario to Chicago 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Chicago in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,086,534 searches. Data last updated April 23, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to Chicago in 2024. More deals are always being added, so be sure to check back regularly.
Mon 5/1312:59 amONT - MDW
1 stop8h 39mFrontier
Wed 5/225:01 amMDW - ONT
1 stop10h 33mFrontier
Deal found 4/22$88
Sat 5/187:04 amONT - MDW
1 stop12h 34mFrontier
Wed 5/225:01 amMDW - ONT
1 stop10h 33mFrontier
Deal found 4/22$89
Tue 5/147:16 amONT - MDW
1 stop12h 49mFrontier
Thu 5/1610:22 pmMDW - ONT
1 stop27h 37mFrontier
Deal found 4/22$90
Mon 5/2012:59 amONT - MDW
1 stop14h 13mFrontier
Wed 5/225:01 amMDW - ONT
1 stop10h 33mFrontier
Deal found 4/23$93
Tue 5/147:16 amONT - MDW
1 stop12h 49mFrontier
Fri 5/179:10 pmMDW - ONT
1 stop13h 54mFrontier
Deal found 4/22$99
Tue 5/712:59 amONT - MDW
1 stop8h 39mFrontier
Tue 5/216:00 amMDW - ONT
1 stop9h 24mFrontier
Deal found 4/22$100
Sat 5/1810:10 pmONT - MDW
1 stop5h 40mFrontier
Mon 5/209:10 pmMDW - ONT
1 stop13h 54mFrontier
Deal found 4/22$101
Mon 5/612:59 amONT - MDW
1 stop8h 39mFrontier
Mon 5/135:30 amMDW - ONT
1 stop26h 56mFrontier
Deal found 4/22$102
Wed 5/812:39 pmONT - MDW
1 stop20h 57mFrontier
Mon 5/1310:59 pmMDW - ONT
1 stop10h 04mFrontier
Deal found 4/22$103

Non-stop flights to Chicago from Ontario

Discover non-stop flight options from Ontario to Chicago. 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 3,086,534 searches. Data last updated April 23, 2024.
For a quicker trip, book one of these direct flights from Ontario to Chicago. Users seeking other options on flights from Ontario to Chicago should update the search form at the top of the page.
Sun 5/56:00 amONT - MDW
Nonstop3h 55mSouthwest
Thu 5/912:55 pmMDW - ONT
Nonstop4h 10mSouthwest
Deal found 4/23$855
Mon 5/67:50 amONT - MDW
Nonstop3h 45mSouthwest
Thu 5/912:55 pmMDW - ONT
Nonstop4h 10mSouthwest
Deal found 4/22$937

Ontario to Chicago flights leaving soon

Find last-minute flight options from Ontario to Chicago 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 3,086,534 searches. Data last updated April 23, 2024.
Have a look at some of the last-minute flights available departing from Ontario to Chicago. To prevent any unwanted surprises, users should verify their flight info before booking.
Tue 5/712:59 amONT - ORD
1 stop21h 57mFrontier
Tue 5/217:59 pmORD - ONT
1 stop18h 56mFrontier
Deal found 4/22$114
Mon 5/612:59 amONT - ORD
1 stop21h 57mFrontier
Tue 5/146:27 pmORD - ONT
1 stop7h 32mFrontier
Deal found 4/22$117
Tue 5/72:01 pmONT - ORD
1 stop8h 51mFrontier
Wed 5/86:27 pmORD - ONT
1 stop7h 32mFrontier
Deal found 4/22$118
Mon 5/612:59 amONT - ORD
1 stop21h 57mFrontier
Tue 5/218:00 amORD - ONT
1 stop7h 24mFrontier
Deal found 4/22$124
Tue 5/712:59 amONT - ORD
1 stop21h 57mFrontier
Sat 5/116:27 pmORD - ONT
1 stop14h 04mFrontier
Deal found 4/23$128
Tue 5/712:59 amONT - ORD
1 stop21h 57mFrontier
Wed 5/156:27 pmORD - ONT
1 stop7h 32mFrontier
Deal found 4/22$129
Mon 4/2912:59 amONT - MDW
1 stop8h 39mFrontier
Tue 5/710:59 pmMDW - ONT
1 stop10h 09mFrontier
Deal found 4/23$132
Tue 5/712:59 amONT - ORD
1 stop21h 57mFrontier
Fri 5/177:15 amORD - ONT
1 stop10h 30mFrontier
Deal found 4/22$134
Mon 5/612:59 amONT - ORD
1 stop21h 57mFrontier
Wed 5/156:27 pmORD - ONT
1 stop7h 32mFrontier
Deal found 4/22$138

One-way flights to Chicago from Ontario

Search for one-way flight options from Ontario to Chicago. 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 3,086,534 searches. Data last updated April 23, 2024.
Some of the best available deals we've found on one-way flights from Ontario to Chicago. Users in need of a round-trip flight from Ontario to Chicago instead should update the search form at the top of page.
Wed 5/157:36 pmONT - MDW
1 stop8h 14mFrontier
Deal found 4/22$45
Sat 5/1810:10 pmONT - MDW
1 stop5h 40mFrontier
Deal found 4/22$48
Mon 5/2012:59 amONT - MDW
1 stop14h 13mFrontier
Deal found 4/23$53
Wed 5/224:19 pmONT - MDW
1 stop19h 27mFrontier
Deal found 4/22$55
Tue 5/712:59 amONT - MDW
1 stop8h 39mFrontier
Deal found 4/22$59
Tue 5/72:01 pmONT - ORD
1 stop8h 51mFrontier
Deal found 4/23$59
Fri 5/1712:59 amONT - MDW
1 stop8h 14mFrontier
Deal found 4/21$63
Fri 5/1711:04 pmONT - MDW
1 stop28h 46mFrontier
Deal found 4/22$64
Tue 5/712:59 amONT - ORD
1 stop21h 57mFrontier
Deal found 4/23$64

Find flights from Ontario to Chicago within your budget

Customize your flight search to find flights from Ontario to Chicago 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 3,086,534 searches. Data last updated April 23, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$88 - $266

Route

Depart

Return

Price

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Mon 5/13

1 stop8h 39m

Chicago Midway

Wed 5/22

1 stop10h 33m

$88

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Sat 5/18

1 stop12h 34m

Chicago Midway

Wed 5/22

1 stop10h 33m

$89

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Tue 5/14

1 stop12h 49m

Chicago Midway

Thu 5/16

1 stop27h 37m

$90

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Tue 5/14

1 stop12h 49m

Chicago Midway

Fri 5/17

1 stop13h 54m

$99

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Tue 5/7

1 stop8h 39m

Chicago Midway

Tue 5/21

1 stop9h 24m

$100

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Sat 5/18

1 stop5h 40m

Chicago Midway

Mon 5/20

1 stop13h 54m

$101

OntarioChicago Midway

ONT - MDW

ONTMDW

Ontario

Mon 5/6

1 stop8h 39m

Chicago Midway

Mon 5/13

1 stop26h 56m

$102

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 5/21

1 stop7h 36m

Chicago O'Hare Intl

Tue 5/28

1 stop6h 22m

$220

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 6/11

1 stop7h 41m

Chicago O'Hare Intl

Wed 6/19

1 stop10h 28m

$266

Flights are sorted by cheapest first

Deals found on 4/22

When is the best time to book a flight from Ontario to Chicago?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Chicago. Price data was last updated on January 28, 2024.
The best time to book flights from Ontario to Chicago is 71 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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When is the cheapest time to fly from Ontario to Chicago?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Chicago. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to Chicago flight should consider departing on Tuesday afternoons 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.
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Average price of flights to Chicago by month

Plan your trip from Ontario to Chicago by taking into account the cheapest months to travel. The average price of a one-way flight from Ontario to Chicago is currently $57 while a round-trip flight costs $128. Price data was last updated on April 21, 2024.

Currently, February is the cheapest month in which you can book a flight from Ontario to Chicago (average of $245). Flying from Ontario to Chicago in June is currently the most expensive (average of $356). 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

$248

February

$245

March

$280

April

$273

May

$282

June

$356

July

$336

August

$276

September

$258

October

$248

November

$270

December

$248

Temperature and rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average temperature and rainfall totals by month.

CHI

Temperature

23 - 73.4 °F

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated April 23, 2024.
To help decide which airline to fly from Ontario to Chicago, see what other customers have to say about American Airlines, Delta and Frontier. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,102 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,102 reviews
Alaska Airlines
8.1
Very good
9,102 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.1
Very good
11,028 reviews
Alaska Airlines
8.1
Very good
9,102 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Avianca
7.6
Good
3,939 reviews
Alaska Airlines
8.1
Very good
9,102 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
11,289 reviews
Alaska Airlines
8.1
Very good
9,102 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
14,914 reviews
Alaska Airlines
8.1
Very good
9,102 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Chicago?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Chicago. You should not have trouble finding flights to Chicago from Ontario; the airport handles an average of 1 outbound flight to Chicago per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Ontario airport to Chicago. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • Can I find flights from Ontario to Chicago for under $100 on Cheapflights?

    Yes, there are multiple flights from Ontario to Chicago for under $100. The cheapest flight booked recently is on Frontier for just $88, but on average you can expect to pay $105.

  • Are there nonstop flights from Ontario to Chicago for under $900 on Cheapflights?

    Cheapflights has at least 2 direct flights from Ontario to Chicago under $900. A good price for a nonstop flight from Ontario to Chicago is less than $896.

  • Are there last-minute flights available from Ontario to Chicago for under $200?

    There are currently 20+ open flights from Ontario to Chicago within the next 7 days for less than $200.

  • What is the cheapest airline to fly from Ontario to Chicago round-trip?

    Cheapflights users have booked flights from Ontario to Chicago round-trip from $88. This flight start at 70% lower than the current average price 3 months from now.

  • What are the most popular routes from Ontario to Chicago?

    Most travelers choose Ontario - Chicago O'Hare Intl, Ontario - Chicago Midway or Ontario - Chicago Greater Rockford when deciding on the best route from Ontario to Chicago.

  • What are the most popular airlines that fly from Ontario to Chicago?

    American Airlines, Delta and Frontier are the most popular airlines when flying from Ontario to Chicago.

  • What does ONT to ORD mean?

    ONT and ORD are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. ONT to ORD refers to a flight route from Ontario Airport to Chicago O'Hare Intl Airport. Chicago Midway Airport (MDW), Chicago Greater Rockford Airport (RFD) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from Ontario to Chicago that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to Chicago flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to Chicago with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to Chicago flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Ontario to Chicago that include hotel bookings?

    Yes. In addition to deals on Ontario to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Chicago.

  • Can I find deals for business class flights from Ontario to Chicago?

    Yes. Cheapflights offers flight deals from Ontario to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ontario to Chicago that allow pets onboard?

    Many airlines flying from Ontario to Chicago offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to Chicago?

    Yes, you can often find last-minute deals on Ontario to Chicago flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to Chicago flight deals updated?

    The Ontario to Chicago flight deals you see on this page were last updated on 4/23.

See more FAQs

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Alternative routes for Ontario to Chicago
See prices for flight routes from nearby airports that may be better suited for you.

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Top 5 airlines flying from Ontario to Chicago

Discover the top 5 airlines that operate flights from Ontario to Chicago. 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 3,086,534 searches. Data last updated April 23, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$105Average$261FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$122Average$234FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapest$276Average$459FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$296Average$465FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$305Average$450FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
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Ontario to Charlottesville flights

Search flights from Ontario to Chicago by cabin class

Find flights from Ontario to Chicago, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Ontario to Chicago

Find hourly flight availability from Ontario to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 23, 2024.
0%of flight departuresEarly morningMidnight to 6 am
100%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Ontario to Chicago

Explore weekly flight availability from Ontario to Chicago. 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 April 23, 2024.
Sunday1daily flight
Monday2daily flights
Tuesday2daily flights
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Friday2daily flights
Saturday2daily flights

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Fly with Cheapflights

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How does Cheapflights help users find flights from Ontario to Chicago?

When you search for this flight from Ontario to Chicago, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Chicago?

Cheapflights helps you find that perfect flight to Chicago from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario to Chicago with no change fees?

Yes, we can. To see specific flights from Ontario to Chicago 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 Ontario to Chicago become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Chicago from Ontario today and book when prices fit your budget.

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