$135+ Cheap flights from Ontario to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — ORD
Nov 30 — Dec 71
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Illinois
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Cheapest flights from Ontario to IllinoisExplore the most affordable flight options available from Ontario to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 31, 2026.
Explore the most affordable flight options available from Ontario to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 31, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/194:35 pm -
Nonstop2h 05m
Mon 11/236:20 pm -
Nonstop1h 45m
Deal found 10/27![Porter Airlines logo]()
$213
This Kissandfly.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/194:35 pm -
Nonstop2h 05m
Sun 11/226:20 pm -
Nonstop1h 45m
Deal found 10/27![Porter Airlines logo]()
$214
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2510:29 am -
Nonstop2h 05m
Mon 11/3012:15 pm -
Nonstop1h 45m
Deal found 10/27![Porter Airlines logo]()
$215
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/234:35 pm -
Nonstop2h 05m
Thu 12/312:15 pm -
Nonstop1h 45m
Deal found 10/27![Porter Airlines logo]()
$216
This Kissandfly.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:35 pm -
Nonstop2h 05m
Sun 11/226:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$218
This FlightHub deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/204:35 pm -
Nonstop2h 05m
Sun 11/226:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$220
This SmartFares deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/208:00 am -
1 stop8h 00m
Tue 11/2410:15 am -
Nonstop1h 37m
Deal found 10/26![Air Canada logo]()
$222
This Booking.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/104:35 pm -
Nonstop2h 05m
Thu 12/176:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$222
This Kissandfly.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/112:35 pm -
Nonstop2h 03m
Mon 12/1410:05 am -
Nonstop1h 37m
Deal found 10/26![Air Canada logo]()
$223
This SmartFares deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/204:35 pm -
Nonstop2h 05m
Tue 11/246:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$223
This SmartFares deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2212:05 pm -
Nonstop2h 15m
Tue 11/241:55 pm -
Nonstop1h 47m
Deal found 10/27![Air Canada logo]()
$224
This Air Canada deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:30 pm -
Nonstop2h 13m
Mon 11/168:40 pm -
Nonstop1h 43m
Deal found 10/26![Air Canada logo]()
$228
Best flights from Ontario to IllinoisDiscover carefully curated flight deals from Ontario to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 31, 2026.
Discover carefully curated flight deals from Ontario to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 31, 2026.
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/259:45 am -
1 stop5h 14m
Sun 11/298:29 am -
1 stop4h 01m
Deal found 10/26![Delta logo]()
$261
This Porter Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/14:35 pm -
Nonstop1h 55m
Thu 3/412:20 pm -
Nonstop1h 40m
Deal found 10/26![Porter Airlines logo]()
$264
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/273:35 pm -
Nonstop2h 15m
Sun 1/313:45 pm -
Nonstop2h 00m
Deal found 10/30![United Airlines logo]()
$319
This United deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/216:45 am -
Nonstop2h 12m
Sat 1/93:45 pm -
1 stop6h 11m
Deal found 10/30![Multiple Airlines logo]()
$319
This Air Transat deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/74:35 pm -
Nonstop1h 55m
Mon 1/1112:20 pm -
Nonstop1h 40m
Deal found 10/30![Air Transat logo]()
$334
This KAYAK deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:20 pm -
1 stop7h 10m
Thu 11/1210:32 am -
1 stop7h 25m
Deal found 10/27![Air Canada logo]()
$347
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/86:00 am -
1 stop4h 37m
Wed 12/99:37 am -
1 stop6h 43m
Deal found 10/26![Delta logo]()
$261
This Porter Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:29 am -
Nonstop2h 05m
Thu 12/312:15 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$273
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:00 am -
1 stop4h 46m
Wed 11/259:30 am -
1 stop6h 50m
Deal found 10/27![Delta logo]()
$261
This Porter Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1210:29 am -
Nonstop2h 05m
Fri 12/412:15 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$273
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:00 am -
1 stop4h 46m
Tue 12/11:41 pm -
1 stop8h 26m
Deal found 10/27![Delta logo]()
$261
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/147:03 am -
2 stops11h 24m
Mon 12/215:00 am -
1 stop15h 44m
Deal found 10/30![American Airlines logo]()
$638
This United deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/127:26 pm -
Nonstop2h 22m
Sun 11/1510:15 am -
Nonstop1h 37m
Deal found 10/28![Multiple Airlines logo]()
$321
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/125:55 pm -
Nonstop2h 10m
Mon 11/167:03 am -
Nonstop1h 44m
Deal found 10/28![United Airlines logo]()
$322
This Porter Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1210:29 am -
Nonstop2h 05m
Mon 11/306:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$273
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:00 am -
1 stop4h 46m
Tue 11/249:30 am -
1 stop6h 50m
Deal found 10/27![Delta logo]()
$261
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:26 pm -
Nonstop2h 22m
Sat 11/141:07 pm -
1 stop7h 17m
Deal found 10/28![United Airlines logo]()
$322
This United deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:45 am -
Nonstop2h 09m
Mon 11/234:45 pm -
Nonstop1h 40m
Deal found 10/26![Multiple Airlines logo]()
$323
This Porter Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/124:35 pm -
Nonstop2h 05m
Sat 11/2812:15 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$273
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/89:45 am -
1 stop4h 32m
Mon 1/111:59 pm -
1 stop4h 15m
Deal found 10/27![Delta logo]()
$261
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/135:55 pm -
Nonstop2h 10m
Mon 11/166:05 pm -
1 stop4h 47m
Deal found 10/28![United Airlines logo]()
$322
This Porter Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/124:35 pm -
Nonstop2h 05m
Tue 12/112:15 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$273
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:26 pm -
Nonstop2h 22m
Wed 11/116:04 am -
1 stop7h 21m
Deal found 10/26![United Airlines logo]()
$323
This Porter Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:29 am -
Nonstop2h 05m
Fri 12/46:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$273
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/245:30 am -
2 stops8h 31m
Wed 1/276:40 pm -
2 stops28h 00m
Deal found 10/27![WestJet logo]()
$905
This United Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:45 am -
Nonstop2h 09m
Sun 11/157:03 am -
Nonstop1h 44m
Deal found 10/27![United Airlines logo]()
$323
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/129:45 am -
1 stop4h 06m
Wed 12/29:37 am -
1 stop6h 43m
Deal found 10/26![Delta logo]()
$295
This United Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/216:45 am -
Nonstop2h 12m
Thu 12/316:17 pm -
Nonstop1h 58m
Deal found 10/27![United Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/93:15 pm -
2 stops17h 05m
Fri 12/116:20 pm -
1 stop16h 13m
Deal found 10/26![Multiple Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/268:35 am -
Nonstop2h 09m
Sat 11/289:21 pm -
Nonstop1h 38m
Deal found 10/26![United Airlines logo]()
$323
Last-minute flights from Ontario to IllinoisDiscover last-minute flight deals from Ontario to Illinois. Data last updated October 31, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Illinois. Data last updated October 31, 2026 and is based on user searches.
This Kissandfly.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:35 pm -
Nonstop2h 05m
Sun 11/226:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$218
This Air Canada deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:30 pm -
Nonstop2h 13m
Mon 11/168:40 pm -
Nonstop1h 43m
Deal found 10/26![Air Canada logo]()
$228
This Air Canada deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1710:45 am -
1 stop5h 17m
Tue 11/241:55 pm -
Nonstop1h 47m
Deal found 10/27![Air Canada logo]()
$228
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/194:35 pm -
Nonstop2h 05m
Mon 11/236:20 pm -
Nonstop1h 45m
Deal found 10/27![Porter Airlines logo]()
$213
This Kissandfly.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/194:35 pm -
Nonstop2h 05m
Sun 11/226:20 pm -
Nonstop1h 45m
Deal found 10/27![Porter Airlines logo]()
$214
This FlightHub deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/204:35 pm -
Nonstop2h 05m
Mon 11/236:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$216
This FlightHub deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/204:35 pm -
Nonstop2h 05m
Sun 11/226:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$220
This SmartFares deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/208:00 am -
1 stop8h 00m
Tue 11/2410:15 am -
Nonstop1h 37m
Deal found 10/26![Air Canada logo]()
$222
This SmartFares deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/204:35 pm -
Nonstop2h 05m
Tue 11/246:20 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$223
This SmartFares deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2212:05 pm -
Nonstop2h 15m
Tue 11/241:55 pm -
Nonstop1h 47m
Deal found 10/27![Air Canada logo]()
$224
This FlightHub deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2410:29 am -
Nonstop2h 05m
Mon 11/3012:15 pm -
Nonstop1h 45m
Deal found 10/26![Porter Airlines logo]()
$229
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2510:29 am -
Nonstop2h 05m
Mon 11/3012:15 pm -
Nonstop1h 45m
Deal found 10/27![Porter Airlines logo]()
$215
One-way flights from Ontario to IllinoisSearch for one-way flight options from Ontario to Illinois. Find affordable one-way fares based on user searches. Data last updated October 31, 2026.
Search for one-way flight options from Ontario to Illinois. Find affordable one-way fares based on user searches. Data last updated October 31, 2026.
This eDestinos deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2210:29 am -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Porter Airlines logo]()
$135
This Gotogate deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/269:50 am -
1 stop6h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Air Canada logo]()
$137
This Gotogate deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/268:05 am -
2 stops7h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Air Canada logo]()
$139
This Trip.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/174:35 pm -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Porter Airlines logo]()
$139
This Trip.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2110:29 am -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Porter Airlines logo]()
$140
This American Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2411:45 am -
Nonstop2h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![American Airlines logo]()
$141
This FlightHub deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:35 pm -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Porter Airlines logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/110:35 am -
Nonstop1h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Porter Airlines logo]()
$142
This SmartFares deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2410:29 am -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Air Transat logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/410:29 am -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Porter Airlines logo]()
$146
This Gotogate deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/274:30 pm -
Nonstop2h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Air Canada logo]()
$147
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2510:29 am -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Air Transat logo]()
$147
Find flight deals from Ontario to Illinois
Keep the following information in mind while searching for Ontario to Illinois flight deals. Data was last updated October 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $213 (Kiwi.com) |
One-way from | $135 (eDestinos) |
Popular in | October |
Cheapest in | February |
Average price | $316 |
Good round-trip deal | $274 or less |
Good one-way deal | $243 or less |
Cheapflights Fare Finder
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 7,457,451 searches. Data last updated October 31, 2026.
Use the filters below to find and compare flights from Ontario to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Thu 12/10
2:25 pm-8:15 pm
1 stop6h 50m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$160
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Fri 12/4
12:15 pm-6:26 pm
1 stop7h 11m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$160
TorontoChicago
YYZ Toronto Pearson Intl - MDW Chicago Midway
YYZMDW
Toronto Pearson Intl
Fri 12/11
12:15 pm-6:01 pm
1 stop6h 46m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$160
TorontoChicago
YYZ Toronto Pearson Intl - MDW Chicago Midway
YYZMDW
Toronto Pearson Intl
Tue 11/24
6:00 am-12:51 pm
1 stop7h 51m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$160
TorontoChicago
YYZ Toronto Pearson Intl - MDW Chicago Midway
YYZMDW
Toronto Pearson Intl
Thu 12/10
2:25 pm-6:01 pm
1 stop4h 36m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$160
TorontoChicago
YYZ Toronto Pearson Intl - MDW Chicago Midway
YYZMDW
Toronto Pearson Intl
Thu 11/26
6:00 am-11:25 am
1 stop6h 25m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$160
TorontoChicago
YYZ Toronto Pearson Intl - MDW Chicago Midway
YYZMDW
Toronto Pearson Intl
Thu 12/3
6:00 am-9:37 am
1 stop4h 37m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$160
TorontoChicago
YTZ Toronto Island - ORD Chicago O'Hare Intl
YTZORD
Toronto Island
Thu 12/10
4:35 pm-5:40 pm
Nonstop2h 05m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$164
TorontoChicago
YTZ Toronto Island - ORD Chicago O'Hare Intl
YTZORD
Toronto Island
Fri 11/27
10:29 am-11:34 am
Nonstop2h 05m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$174
Quickest round-trip
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Tue 11/17
10:53 am-11:57 am
Nonstop2h 04m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$177
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Ontario with our price prediction graph.
YYZ-ORD
YTZ-ORD
YYZ-MDW
YYZ-PIA
YOW-MDW
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Illinois
CAON-USIL
YYZ-ORD
YTZ-ORD
YYZ-MDW
YYZ-PIA
What is the cheapest month to book a flight from Region of Ontario to Illinois?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Illinois (average of $270). Flying from Region of Ontario to Illinois in October is currently the most expensive (average of $342). 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.
What is the cheapest time of day to fly from ON to IL?
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 October 31, 2026.
One of the essential ways to save on airfare from Region of Ontario to Illinois is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 30% on airfare.
How much does it cost to fly round-trip from Region of Ontario to Illinois?
Airfare is below average for this route at the moment.
Region of Ontario to Illinois flights typically cost between $244 and $617 in November.The cheapest round-trip price found within the last 5 days was $222 on Air Canada (Nov 20-Nov 24).
How far ahead should I book a flight from Region of Ontario to Illinois?
The best time to book flights from Region of Ontario to Illinois is 87 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.
What is the cheapest day to fly from Region of Ontario to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Ontario to Illinois. Price data was last updated on October 24, 2026.
Travelers seeking maximum savings on their Region of Ontario to Illinois flight should consider departing on Sunday at noon when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 October 31, 2026.
See what other customers who have flown with Porter Airlines,United Airlines, andAir Canada from Ontario to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Crew
8.6
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Overall
8.0
Crew
8.6
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Overall
8.0
Crew
8.6
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Overall
8.0
Crew
8.6
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Overall
8.0
Crew
8.6
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
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.
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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.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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.
Ontario and Illinois flights
Browse other Ontario and Illinois flight options. Last updated on October 31, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Illinois
Find the right flight back to Ontario after your stay in Illinois
Ontario to Illinois flights
Consider these flights traveling from Ontario to Illinois.
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 7,457,451 searches. Data last updated October 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$494 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$185 | Average$384 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$190 | Average$505 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$193 | Average$311 | FlexibilityNo cancel fee | On-time71% |