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Cheap flights from Ontario to Illinois from $133

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 5/29. 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.
YYZ — ORD
May 23 — May 301
From?
To?
Thu 5/23
Thu 5/30
1 adult, Economy
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How far in advance should I book a flight from Region of Ontario to Illinois?

Travelers have found it’s best to book a flight 38 days in advance to save up to 90% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 38 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Region of Ontario to Illinois 1-2 weeks in advance for as low as $344, or $489 for flights within the next 24 hours.

What is the cheapest month to fly from Region of Ontario to Illinois?

Flights from Region of Ontario to Illinois lean towards being more expensive in September. Prices are generally better when you fly from Region of Ontario to Illinois in April, with the cheapest ticket starting at $193.

When is the cheapest time to fly from Region of Ontario to Illinois (ON - IL)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Illinois as you normally would.

Cheap Air Canada flights from Ontario to Illinois

Explore cheap flight options specifically provided by Air Canada for the route between Ontario and Illinois. 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 2,634,509 searches. Data last updated May 18, 2024.
Peruse some of the lowest-priced Air Canada flights we've found from Ontario to Illinois. It's recommended that users confirm their flight details before booking.
Mon 7/17:47 amYYZ - ORD
Nonstop1h 56mAir Canada
Tue 7/169:15 pmORD - YYZ
Nonstop1h 43mAir Canada
Deal found 5/16$242
Wed 7/36:30 amYYZ - ORD
1 stop4h 31mAir Canada
Tue 7/169:15 pmORD - YYZ
Nonstop1h 43mAir Canada
Deal found 5/16$247
Fri 7/269:00 amYYZ - ORD
1 stop6h 40mAir Canada
Sun 7/286:00 amORD - YYZ
Nonstop1h 48mAir Canada
Deal found 5/17$249
Mon 6/175:30 pmYYZ - ORD
Nonstop1h 56mAir Canada
Thu 6/206:00 amORD - YYZ
Nonstop1h 48mAir Canada
Deal found 5/17$253
Thu 9/268:40 amYUL - ORD
1 stop4h 57mAir Canada
Sun 9/297:25 amORD - YUL
1 stop5h 46mAir Canada
Deal found 5/18$261
Tue 5/286:30 amYYZ - ORD
1 stop4h 31mAir Canada
Fri 5/316:00 amORD - YYZ
Nonstop1h 45mAir Canada
Deal found 5/17$303
Sun 5/269:00 amYYZ - ORD
Nonstop1h 54mAir Canada
Sat 6/19:15 pmORD - YYZ
Nonstop1h 43mAir Canada
Deal found 5/17$309
Mon 5/2712:00 pmYYZ - ORD
Nonstop1h 54mAir Canada
Thu 6/66:00 amORD - YYZ
Nonstop1h 45mAir Canada
Deal found 5/17$326
Fri 5/246:30 amYYZ - ORD
1 stop4h 31mAir Canada
Fri 5/316:00 amORD - YYZ
Nonstop1h 45mAir Canada
Deal found 5/17$329

Cheap United Airlines flights from Ontario to Illinois

Explore cheap flight options specifically provided by United Airlines for the route between Ontario and Illinois. 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 2,634,509 searches. Data last updated May 18, 2024.
Take a gander at the lowest prices we've found on United Airlines flights from Ontario to Illinois. Make sure to examine the flight information before completing your reservation.
Fri 5/317:55 amYYZ - ORD
Nonstop1h 56mUnited Airlines
Sat 6/19:15 pmORD - YYZ
Nonstop1h 43mUnited Airlines
Deal found 5/17$243
Sat 6/16:15 amYYZ - ORD
1 stop4h 28mUnited Airlines
Wed 6/59:15 pmORD - YYZ
Nonstop1h 43mUnited Airlines
Deal found 5/17$258
Fri 5/317:43 pmYYZ - ORD
1 stop4h 37mUnited Airlines
Sun 6/27:10 amORD - YYZ
Nonstop1h 48mUnited Airlines
Deal found 5/17$273
Fri 8/27:43 pmYYZ - ORD
1 stop12h 57mUnited Airlines
Sun 8/47:10 amORD - YYZ
Nonstop1h 48mUnited Airlines
Deal found 5/18$283
Fri 5/317:43 pmYYZ - ORD
1 stop4h 37mUnited Airlines
Tue 6/49:15 pmORD - YYZ
Nonstop1h 43mUnited Airlines
Deal found 5/17$287
Tue 5/287:50 pmYYZ - ORD
Nonstop1h 54mUnited Airlines
Mon 6/39:15 pmORD - YYZ
Nonstop1h 43mUnited Airlines
Deal found 5/17$298
Tue 5/287:43 pmYYZ - ORD
1 stop4h 37mUnited Airlines
Sun 6/27:10 amORD - YYZ
Nonstop1h 48mUnited Airlines
Deal found 5/17$313
Sat 5/256:50 pmYYZ - ORD
1 stop5h 30mUnited Airlines
Mon 6/39:15 pmORD - YYZ
Nonstop1h 43mUnited Airlines
Deal found 5/17$324
Tue 5/287:43 pmYYZ - ORD
1 stop4h 37mUnited Airlines
Thu 6/67:10 amORD - YYZ
Nonstop1h 48mUnited Airlines
Deal found 5/17$341

Cheap Ontario to Illinois flights in May & June 2024

Find cheap flight options from Ontario to Illinois specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,634,509 searches. Prices were last updated on May 18, 2024.
Scroll through some of the best deals on flights from Ontario to Illinois in 2024. Check back soon for alternative fares.
Sun 6/210:30 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Thu 6/68:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$218
Mon 6/39:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Thu 6/68:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$219
Fri 6/143:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Mon 6/175:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/16$221
Mon 6/33:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Thu 6/65:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/18$222
Sat 6/1510:45 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Mon 6/248:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$223
Fri 5/313:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Tue 6/118:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$224
Wed 6/59:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Tue 6/1111:05 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$229
Wed 6/199:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Wed 6/195:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/18$230
Wed 6/53:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Sat 6/88:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$231

Ontario to Illinois 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Illinois in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,634,509 searches. Data last updated May 18, 2024.
Scroll through some of the best deals on flights from Ontario to Illinois in 2024. Check back soon for alternative fares.
Mon 9/99:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Thu 9/128:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/16$218
Mon 6/39:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Thu 6/68:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$219
Fri 6/143:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Mon 6/175:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/16$221
Mon 6/33:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Thu 6/65:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/18$222
Sat 6/1510:45 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Mon 6/248:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$223
Fri 5/313:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Tue 6/118:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$224
Wed 6/59:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Tue 6/1111:05 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$229
Wed 6/199:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Wed 6/195:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/18$230
Wed 6/53:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Sat 6/88:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$231

Non-stop flights to Illinois from Ontario

Discover non-stop flight options from Ontario to Illinois. 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 2,634,509 searches. Data last updated May 18, 2024.
To help reduce your travel time, choose from one of these non-stop flights from Ontario to Illinois. Those looking to potentially save on 1 or 2-stop flights from Ontario to Illinois should utilize the search form at the the top of the page.
Mon 9/99:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Thu 9/128:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/16$218
Mon 6/39:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Thu 6/68:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$219
Fri 6/143:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Mon 6/175:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/16$221
Mon 6/33:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Thu 6/65:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/18$222
Sat 6/1510:45 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Mon 6/248:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$223
Fri 5/313:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Tue 6/118:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$224
Wed 6/59:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Tue 6/1111:05 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$229
Wed 6/199:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Wed 6/195:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/18$230
Wed 6/53:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Sat 6/88:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$231

Ontario to Illinois flights leaving soon

Find last-minute flight options from Ontario to Illinois 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 2,634,509 searches. Data last updated May 18, 2024.
Book one of these great deals on flights from Ontario to Illinois. Tip: verify your flight details before completing your reservation.
Tue 5/288:00 pmYYZ - STL
1 stop15h 13mMultiple Airlines
Wed 6/57:29 pmSTL - YYZ
1 stop10h 13mMultiple Airlines
Deal found 5/17$244
Mon 5/279:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Mon 6/38:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$274
Fri 5/248:50 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Fri 5/318:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 5/17$296
Tue 5/287:50 pmYYZ - ORD
Nonstop1h 54mUnited Airlines
Mon 6/39:15 pmORD - YYZ
Nonstop1h 43mUnited Airlines
Deal found 5/17$298
Sat 5/258:35 amYUL - MDW
1 stop3h 57mPorter Airlines
Sun 6/305:25 pmMDW - YUL
1 stop4h 05mPorter Airlines
Deal found 5/17$298
Tue 5/286:30 amYYZ - ORD
1 stop4h 31mAir Canada
Fri 5/316:00 amORD - YYZ
Nonstop1h 45mAir Canada
Deal found 5/17$303
Sun 5/269:00 amYYZ - ORD
Nonstop1h 54mAir Canada
Sat 6/19:15 pmORD - YYZ
Nonstop1h 43mAir Canada
Deal found 5/17$309
Sat 5/252:45 pmYUL - ORD
1 stop9h 44mMultiple Airlines
Wed 5/2910:58 amORD - YUL
2 stops12h 35mMultiple Airlines
Deal found 5/17$310
Mon 5/276:30 amYYZ - ORD
1 stop28h 25mMultiple Airlines
Mon 6/35:40 amORD - YYZ
1 stop15h 17mMultiple Airlines
Deal found 5/17$312

One-way flights to Illinois from Ontario

Search for one-way flight options from Ontario to Illinois. 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 2,634,509 searches. Data last updated May 18, 2024.
Users traveling one-way from Ontario to Illinois can select one of these great deals. Users in need of a round-trip flight from Ontario to Illinois instead should update the search form at the top of page.
Wed 5/296:30 amYYZ - ORD
1 stop11h 05mMultiple Airlines
Deal found 5/17$133
Wed 6/56:30 amYYZ - ORD
1 stop17h 23mMultiple Airlines
Deal found 5/16$134
Tue 6/189:20 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Deal found 5/18$137
Mon 6/173:30 pmYTZ - MDW
Nonstop1h 47mPorter Airlines
Deal found 5/18$139
Sat 7/2710:45 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Deal found 5/17$142
Fri 7/1912:50 pmYUL - MDW
1 stop4h 27mPorter Airlines
Deal found 5/18$142
Tue 6/186:30 amYYZ - ORD
1 stop16h 28mMultiple Airlines
Deal found 5/17$145
Sat 6/1510:45 amYTZ - MDW
Nonstop1h 47mPorter Airlines
Deal found 5/18$145
Thu 6/69:00 amYYZ - ORD
Nonstop1h 54mAir Canada
Deal found 5/17$146

Find flights from Ontario to Illinois within your budget

Customize your flight search to find flights from Ontario to Illinois 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 2,634,509 searches. Data last updated May 18, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$218 - $479

Route

Depart

Return

Price

Toronto IslandChicago Midway

YTZ - MDW

YTZMDW

Toronto Island

Mon 9/9

Nonstop1h 47m

Chicago Midway

Thu 9/12

Nonstop1h 42m

$218

Toronto IslandChicago Midway

YTZ - MDW

YTZMDW

Toronto Island

Mon 6/3

Nonstop1h 47m

Chicago Midway

Thu 6/6

Nonstop1h 42m

$219

Toronto Pearson IntlChicago O'Hare Intl

YYZ - ORD

YYZORD

Toronto Pearson Intl

Mon 7/1

Nonstop1h 56m

Chicago O'Hare Intl

Tue 7/16

Nonstop1h 43m

$242

Toronto Pearson IntlChicago O'Hare Intl

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 5/31

Nonstop1h 56m

Chicago O'Hare Intl

Sat 6/1

Nonstop1h 43m

$243

Toronto Pearson IntlLambert-St Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 5/28

1 stop15h 13m

Lambert-St Louis

Wed 6/5

1 stop10h 13m

$244

Montreal Pierre Elliott Trudeau IntlChicago O'Hare Intl

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 9/26

Nonstop2h 42m

Chicago O'Hare Intl

Sun 9/29

Nonstop2h 19m

$251

Toronto Pearson IntlChicago O'Hare Intl

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 5/31

1 stop4h 29m

Chicago O'Hare Intl

Wed 6/5

1 stop8h 14m

$268

Toronto Pearson IntlChicago O'Hare Intl

YYZ - ORD

YYZORD

Toronto Pearson Intl

Sun 9/15

1 stop4h 07m

Chicago O'Hare Intl

Mon 9/16

1 stop3h 51m

$302

Toronto Pearson IntlChicago Midway

YYZ - MDW

YYZMDW

Toronto Pearson Intl

Mon 6/17

1 stop8h 19m

Chicago Midway

Thu 6/20

1 stop18h 26m

$479

Flights are sorted by cheapest first

Deals found on 5/16

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated May 18, 2024.
See what other customers who have flown with Air Canada, United Airlines and American Airlines from Ontario to Illinois have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,164 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

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

Alaska Airlines
8.1
Very good
9,164 reviews
Alaska Airlines
8.1
Very good
9,164 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

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

Delta
8.0
Very good
10,647 reviews
Alaska Airlines
8.1
Very good
9,164 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

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

KLM
7.9
Good
1,561 reviews
Alaska Airlines
8.1
Very good
9,164 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

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

WestJet
7.5
Good
2,899 reviews
Alaska Airlines
8.1
Very good
9,164 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

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

Porter Airlines
7.4
Good
414 reviews
Alaska Airlines
8.1
Very good
9,164 reviews
Check prices

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.1

Crew

8.6

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 Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Region of Ontario to Illinois for under $300 on Cheapflights?

    Yes, there are multiple flights from Region of Ontario to Illinois for under $300. The cheapest flight booked recently is on Porter Airlines for just $218, but on average you can expect to pay $231.

  • Are there nonstop flights from Region of Ontario to Illinois for under $300 on Cheapflights?

    Cheapflights has at least 20 direct flights from Region of Ontario to Illinois under $300. A good price for a nonstop flight from Region of Ontario to Illinois is less than $232.

  • Are there last-minute flights available from Region of Ontario to Illinois for under $300?

    There are currently 20+ open flights from Region of Ontario to Illinois within the next 7 days for less than $300.

  • What days are nonstop flights available from Region of Ontario to Illinois?

    You can find nonstop flights on the following days: Sunday, Monday, Tuesday, Wednesday, Saturday.

  • How many flights depart from Region of Ontario to Illinois on average per day?

    20 flight departures from Region of Ontario to Illinois per day on average.
    Morning (6am - Noon) - 45% of flight departures
    Afternoon (Noon - 6pm) - 55% of flight departures

  • How long is the flight from Region of Ontario to Illinois?

    Porter Airlines, Air Canada, and United Airlines can get you from Region of Ontario to Illinois in just under 1h 47m. Your travel time will be generally consistent. Airlines will cover a distance of 437 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines to fly from Region of Ontario to Illinois one-way?

    $137 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from $146 and $147, respectively.

  • What does YYZ to ORD mean?

    This is defined as Toronto Pearson Intl Airport (YYZ) and Chicago O'Hare Intl Airport (ORD). Codes like Chicago O'Hare Intl Airport are often used to just call airports uniquely. Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Springfield Capital Airport (SPI) are other airports near this flight route and their unique identifiers/IATA codes.

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

    The amount of baggage you can bring on your Ontario to Illinois 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 Illinois with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to Illinois 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 Illinois that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Illinois 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 Illinois that allow pets onboard?

    Many airlines flying from Ontario to Illinois 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 Illinois?

    Yes, you can often find last-minute deals on Ontario to Illinois 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 Region of Ontario to Illinois flight deals updated?

    The Region of Ontario to Illinois flight deals you see on this page were last updated on 5/18.

See more FAQs

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

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Top 4 airlines flying from Ontario to Illinois

Discover the top 4 airlines that operate flights from Ontario to Illinois. 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 2,634,509 searches. Data last updated May 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$206Average$323FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
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Search flights from Ontario to Illinois by cabin class

Find flights from Ontario to Illinois, 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 Illinois

Find hourly flight availability from Ontario to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 18, 2024.
14%of flight departuresEarly morningMidnight to 6 am
30%of flight departuresMorning6 am to noon
48%of flight departuresAfternoonNoon to 6 pm
8%of flight departuresEvening6 pm to midnight
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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 Ontario to Illinois?

Cheapflights helps you search for flights from Ontario to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights simply makes it quick and affordable to book flights from Ontario to Illinois by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

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

Yes, Cheapflights offers price alerts on Ontario to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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