$97+ Cheap flights from Illinois to Ontario
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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
Oct 12 — Oct 191
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Ontario 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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Cheapest flights from Illinois to OntarioExplore the most affordable flight options available from Illinois to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 12, 2026.
Explore the most affordable flight options available from Illinois to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 12, 2026.
This Trip.com deal was found by Cheapflights users on 9/10. 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.
Fri 9/253:20 pm -
Nonstop1h 40m
Sat 10/310:10 am -
Nonstop1h 50m
Deal found 9/10![Porter Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Tue 10/276:20 pm -
Nonstop1h 46m
Thu 10/2910:35 am -
Nonstop2h 05m
Deal found 9/11![Porter Airlines logo]()
$214
This Mytrip deal was found by Cheapflights users on 9/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:20 pm -
Nonstop1h 40m
Sun 10/410:10 am -
Nonstop1h 50m
Deal found 9/12![Porter Airlines logo]()
$215
This Trip.com deal was found by Cheapflights users on 9/10. 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.
Mon 10/266:20 pm -
Nonstop1h 46m
Mon 11/210:35 am -
Nonstop2h 05m
Deal found 9/10![Porter Airlines logo]()
$215
This SmartFares deal was found by Cheapflights users on 9/10. 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 11/34:30 pm -
Nonstop1h 40m
Sat 11/72:35 pm -
Nonstop2h 03m
Deal found 9/10![Air Canada logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Tue 10/133:20 pm -
Nonstop1h 40m
Fri 10/2310:10 am -
Nonstop1h 50m
Deal found 9/11![Porter Airlines logo]()
$216
This Trip.com deal was found by Cheapflights users on 9/12. 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 10/2712:20 pm -
Nonstop1h 46m
Tue 11/34:35 pm -
Nonstop2h 05m
Deal found 9/12![Porter Airlines logo]()
$216
This Trip.com deal was found by Cheapflights users on 9/11. 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.
Thu 10/13:20 pm -
Nonstop1h 40m
Tue 10/610:10 am -
Nonstop1h 50m
Deal found 9/11![Porter Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Fri 10/163:20 pm -
Nonstop1h 40m
Sun 10/1810:10 am -
Nonstop1h 50m
Deal found 9/11![Porter Airlines logo]()
$218
This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:00 pm -
Nonstop1h 48m
Sun 10/2510:35 am -
Nonstop2h 05m
Deal found 9/11![Multiple Airlines logo]()
$218
This Mytrip deal was found by Cheapflights users on 9/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:45 am -
Nonstop1h 42m
Tue 11/32:35 pm -
Nonstop2h 03m
Deal found 9/12![Air Canada logo]()
$218
This Trip.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/232:00 pm -
Nonstop1h 48m
Mon 10/2610:35 am -
Nonstop2h 05m
Deal found 9/10![Multiple Airlines logo]()
$220
Best flights from Illinois to OntarioDiscover carefully curated flight deals from Illinois to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 12, 2026.
Discover carefully curated flight deals from Illinois to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/12. 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.
Fri 10/211:45 am -
Nonstop1h 40m
Mon 10/51:45 pm -
Nonstop1h 50m
Deal found 9/12![Porter Airlines logo]()
$214
This United Airlines deal was found by Cheapflights users on 9/8. 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 10/52:52 pm -
Nonstop2h 04m
Thu 10/88:50 am -
Nonstop1h 58m
Deal found 9/8![United Airlines logo]()
$243
This United deal was found by Cheapflights users on 9/11. 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.
Fri 10/3011:05 am -
Nonstop1h 58m
Tue 11/39:00 am -
1 stop6h 52m
Deal found 9/11![Multiple Airlines logo]()
$252
This Trip.com deal was found by Cheapflights users on 9/9. 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.
Thu 10/111:45 am -
Nonstop1h 40m
Sun 10/410:10 am -
Nonstop1h 50m
Deal found 9/9![Air Transat logo]()
$262
This Delta deal was found by Cheapflights users on 9/10. 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 11/206:44 pm -
1 stop3h 13m
Sat 11/2812:15 pm -
1 stop6h 49m
Deal found 9/10![Delta logo]()
$269
This American Airlines deal was found by Cheapflights users on 9/8. 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.
Thu 11/196:00 am -
1 stop7h 33m
Thu 11/266:00 am -
2 stops11h 34m
Deal found 9/8![American Airlines logo]()
$364
This KAYAK deal was found by Cheapflights users on 9/9. 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 10/141:55 pm -
1 stop6h 35m
Fri 10/166:50 am -
1 stop5h 31m
Deal found 9/9![Air Canada logo]()
$367
This FlightHub deal was found by Cheapflights users on 9/11. 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.
Sat 10/1711:45 am -
Nonstop1h 40m
Tue 10/2010:10 am -
Nonstop1h 50m
Deal found 9/11![Porter Airlines logo]()
$233
This KAYAK deal was found by Cheapflights users on 9/8. 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.
Tue 10/132:52 pm -
Nonstop2h 04m
Thu 10/158:50 am -
Nonstop1h 58m
Deal found 9/8![United Airlines logo]()
$243
This Trip.com deal was found by Cheapflights users on 9/8. 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.
Wed 9/3011:45 am -
Nonstop1h 40m
Wed 10/71:45 pm -
Nonstop1h 50m
Deal found 9/8![Porter Airlines logo]()
$234
This United Airlines deal was found by Cheapflights users on 9/10. 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 11/259:21 pm -
Nonstop1h 38m
Mon 11/303:35 pm -
Nonstop2h 09m
Deal found 9/10![United Airlines logo]()
$244
This Delta deal was found by Cheapflights users on 9/12. 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 10/279:29 am -
1 stop3h 07m
Tue 11/312:10 pm -
1 stop6h 50m
Deal found 9/12![Delta logo]()
$269
This Gotogate deal was found by Cheapflights users on 9/8. 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.
Wed 10/213:20 pm -
Nonstop1h 40m
Sat 10/241:45 pm -
Nonstop1h 50m
Deal found 9/8![Porter Airlines logo]()
$239
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/2110:43 am -
Nonstop1h 59m
Sun 10/256:45 am -
Nonstop2h 09m
Deal found 9/11![United Airlines logo]()
$244
This Delta deal was found by Cheapflights users on 9/12. 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 10/19:29 am -
1 stop6h 51m
Sun 10/412:08 pm -
1 stop7h 25m
Deal found 9/12![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sun 10/256:17 pm -
Nonstop1h 58m
Sun 11/16:45 am -
Nonstop2h 09m
Deal found 9/10![United Airlines logo]()
$244
This Delta deal was found by Cheapflights users on 9/10. 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 10/151:27 pm -
1 stop8h 29m
Tue 10/209:40 am -
1 stop4h 07m
Deal found 9/10![Delta logo]()
$269
This Porter Airlines deal was found by Cheapflights users on 9/10. 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.
Sun 10/256:20 pm -
Nonstop1h 46m
Sun 11/14:35 pm -
Nonstop2h 05m
Deal found 9/10![Porter Airlines logo]()
$253
This oojo deal was found by Cheapflights users on 9/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:30 pm -
1 stop11h 05m
Mon 10/58:15 pm -
1 stop21h 25m
Deal found 9/7![WestJet logo]()
$703
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/306:17 pm -
Nonstop1h 58m
Tue 11/33:35 pm -
Nonstop2h 09m
Deal found 9/11![United Airlines logo]()
$244
This United deal was found by Cheapflights users on 9/12. 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.
Fri 10/22:00 pm -
Nonstop1h 48m
Mon 10/512:20 pm -
1 stop7h 26m
Deal found 9/12![Multiple Airlines logo]()
$358
This Delta deal was found by Cheapflights users on 9/8. 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.
Mon 10/59:29 am -
1 stop6h 51m
Thu 10/86:00 am -
1 stop7h 47m
Deal found 9/8![Delta logo]()
$284
This FlightHub deal was found by Cheapflights users on 9/8. 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 10/153:20 pm -
Nonstop1h 40m
Sun 10/1810:10 am -
Nonstop1h 50m
Deal found 9/8![Porter Airlines logo]()
$259
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/152:52 pm -
Nonstop2h 04m
Sun 10/187:00 am -
Nonstop2h 00m
Deal found 9/11![United Airlines logo]()
$244
This United deal was found by Cheapflights users on 9/11. 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 10/291:55 pm -
Nonstop1h 47m
Sun 11/112:20 pm -
1 stop7h 10m
Deal found 9/11![Multiple Airlines logo]()
$358
This United deal was found by Cheapflights users on 9/7. 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.
Tue 11/245:55 am -
1 stop8h 21m
Tue 11/246:10 pm -
Nonstop2h 42m
Deal found 9/7![Multiple Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 9/11. 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 11/2610:14 am -
1 stop7h 47m
Sat 11/286:45 am -
Nonstop2h 09m
Deal found 9/11![United Airlines logo]()
$253
This FlightHub deal was found by Cheapflights users on 9/11. 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 9/223:20 pm -
Nonstop1h 40m
Fri 9/251:45 pm -
Nonstop1h 50m
Deal found 9/11![Porter Airlines logo]()
$289
This Delta deal was found by Cheapflights users on 9/10. 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 11/111:31 pm -
1 stop8h 26m
Sun 11/156:00 am -
1 stop7h 51m
Deal found 9/10![Delta logo]()
$331
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/162:37 pm -
1 stop8h 17m
Mon 10/198:50 am -
Nonstop1h 58m
Deal found 9/10![United Airlines logo]()
$253
Last-minute flights from Illinois to OntarioDiscover last-minute flight deals from Illinois to Ontario. Data last updated September 12, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Ontario. Data last updated September 12, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 9/10. 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.
Fri 9/253:20 pm -
Nonstop1h 40m
Sat 10/310:10 am -
Nonstop1h 50m
Deal found 9/10![Porter Airlines logo]()
$214
This Mytrip deal was found by Cheapflights users on 9/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:20 pm -
Nonstop1h 40m
Sun 10/410:10 am -
Nonstop1h 50m
Deal found 9/12![Porter Airlines logo]()
$215
This Trip.com deal was found by Cheapflights users on 9/11. 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.
Thu 10/13:20 pm -
Nonstop1h 40m
Tue 10/610:10 am -
Nonstop1h 50m
Deal found 9/11![Porter Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Tue 10/133:20 pm -
Nonstop1h 40m
Sat 10/241:45 pm -
Nonstop1h 50m
Deal found 9/11![Porter Airlines logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Fri 10/163:20 pm -
Nonstop1h 40m
Tue 10/2010:10 am -
Nonstop1h 50m
Deal found 9/11![Porter Airlines logo]()
$218
This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:00 pm -
Nonstop1h 48m
Sun 10/2510:35 am -
Nonstop2h 05m
Deal found 9/11![Multiple Airlines logo]()
$218
This Trip.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/232:00 pm -
Nonstop1h 48m
Mon 10/2610:35 am -
Nonstop2h 05m
Deal found 9/10![Multiple Airlines logo]()
$220
This Air Canada deal was found by Cheapflights users on 9/9. 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.
Fri 10/232:00 pm -
Nonstop1h 48m
Mon 10/2612:05 pm -
Nonstop2h 15m
Deal found 9/9![Air Canada logo]()
$221
This Trip.com deal was found by Cheapflights users on 9/10. 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.
Mon 10/266:20 pm -
Nonstop1h 46m
Mon 11/210:35 am -
Nonstop2h 05m
Deal found 9/10![Porter Airlines logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Tue 10/276:20 pm -
Nonstop1h 46m
Thu 10/2910:35 am -
Nonstop2h 05m
Deal found 9/11![Porter Airlines logo]()
$214
This Trip.com deal was found by Cheapflights users on 9/12. 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 10/2712:20 pm -
Nonstop1h 46m
Tue 11/34:35 pm -
Nonstop2h 05m
Deal found 9/12![Porter Airlines logo]()
$216
This Mytrip deal was found by Cheapflights users on 9/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:45 am -
Nonstop1h 42m
Tue 11/32:35 pm -
Nonstop2h 03m
Deal found 9/12![Air Canada logo]()
$218
One-way flights from Illinois to OntarioSearch for one-way flight options from Illinois to Ontario. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
Search for one-way flight options from Illinois to Ontario. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
This Mytrip deal was found by Cheapflights users on 9/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/278:45 am -
1 stop6h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Air Canada logo]()
$97
This Porter Airlines deal was found by Cheapflights users on 9/8. 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 9/303:20 pm -
Nonstop1h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Porter Airlines logo]()
$101
This Air Canada deal was found by Cheapflights users on 9/8. 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.
Sun 11/291:55 pm -
Nonstop1h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Air Canada logo]()
$101
This Air Canada deal was found by Cheapflights users on 9/8. 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.
Sun 11/298:40 pm -
Nonstop1h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Air Canada logo]()
$101
This Mytrip deal was found by Cheapflights users on 9/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2211:05 am -
1 stop6h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Air Canada logo]()
$102
This Air Canada deal was found by Cheapflights users on 9/10. 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.
Sun 10/257:05 am -
1 stop6h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Air Canada logo]()
$104
This Air Canada deal was found by Cheapflights users on 9/9. 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.
Sat 10/108:45 am -
1 stop7h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Air Canada logo]()
$104
This Air Canada deal was found by Cheapflights users on 9/7. 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 10/261:55 pm -
1 stop5h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Air Canada logo]()
$105
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/254:00 pm -
1 stop6h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![United Airlines logo]()
$105
This Delta deal was found by Cheapflights users on 9/10. 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 9/266:40 pm -
1 stop3h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$105
This SmartFares deal was found by Cheapflights users on 9/12. 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 10/183:20 pm -
Nonstop1h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Air Transat logo]()
$106
This Aunt Betty deal was found by Cheapflights users on 9/10. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:45 am -
2 stops8h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Air Canada logo]()
$106
Find flight deals from Illinois to Ontario
Keep the following information in mind while searching for Illinois to Ontario flight deals. Data was last updated September 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $214 (Kiwi.com) |
One-way from | $97 (Mytrip) |
Popular in | August |
Cheapest in | March |
Average price | $298 |
Good round-trip deal | $205 or less |
Good one-way deal | $87 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 12, 2026.
Use the filters below to find and compare flights from Illinois to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Wed 9/30
3:20 pm-6:00 pm
Nonstop1h 40m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$101
ChicagoToronto
ORD Chicago O'Hare Intl - YTZ Toronto Island
ORDYTZ
Chicago O'Hare Intl
Sun 11/29
1:55 pm-4:42 pm
Nonstop1h 47m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$101
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Thu 10/1
8:55 am-1:34 pm
1 stop3h 39m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Sat 12/5
10:25 am-6:43 pm
1 stop7h 18m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Tue 12/8
7:00 am-9:29 pm
1 stop13h 29m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Thu 10/8
1:27 pm-10:56 pm
1 stop8h 29m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Thu 10/29
9:00 am-5:49 pm
1 stop7h 49m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Sat 10/10
1:27 pm-10:56 pm
1 stop8h 29m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Thu 10/1
5:00 am-1:47 pm
1 stop7h 47m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Sun 9/27
9:29 am-5:20 pm
1 stop6h 51m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Illinois with our price prediction graph.
ORD-YTZ
MDW-YTZ
ORD-YYZ
MDW-YYZ
STL-YYZ
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 Illinois to Ontario
USIL-CAON
ORD-YTZ
MDW-YTZ
ORD-YYZ
MDW-YYZ
What is the cheapest month to book a flight from Illinois to Region of Ontario?
Currently, February is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of $286). Flying from Illinois to Region of Ontario in August is currently the most expensive (average of $368). 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 IL to ON?
Find hourly flight availability from Illinois to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 12, 2026.
It’s optimal to fly from Illinois to Region of Ontario in the evening. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight at noon.
Weekly flight availability from Illinois to Region of Ontario
Explore weekly flight availability from Illinois to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 12, 2026.
The most flights from USIL to CAON are scheduled on a Wednesday (69 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (46 on average).
How much does it cost to fly round-trip from Illinois to Region of Ontario?
Airfare is below average for this route at the moment.
Illinois to Region of Ontario flights typically cost between $264 and $422 in November.The cheapest round-trip price found within the last 5 days was $215 on Air Canada (Nov 3-Nov 7).
How far ahead should I book a flight from Illinois to Region of Ontario?
The price you pay for your flight from Illinois to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 71 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Illinois to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Ontario. Price data was last updated on September 12, 2026.
Travelers seeking maximum savings on their Illinois to Region of Ontario flight should consider departing on Saturday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated September 12, 2026.
Read through reviews of airlines operating flights from Illinois to Ontario, such as Porter Airlines,Delta, andUnited Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Entertainment
6.9
Comfort
8.0
Food
7.6
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Entertainment
6.9
Comfort
8.0
Food
7.6
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Entertainment
6.9
Comfort
8.0
Food
7.6
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Entertainment
6.9
Comfort
8.0
Food
7.6
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Entertainment
6.9
Comfort
8.0
Food
7.6
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Entertainment
6.9
Comfort
8.0
Food
7.6
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Related info for your journey
Find useful and relevant information for your journey from Illinois to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Illinois to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Ontario by cabin class
Find flights from Illinois to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Ontario flights
Browse other Illinois and Ontario flight options. Last updated on September 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Ontario
Find the right flight back to Illinois after your stay in Ontario
Illinois to Ontario flights
Consider these flights traveling from Illinois to Ontario.
Top 6 airlines flying from Illinois to Ontario
Discover the top 6 airlines that operate flights from Illinois to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$359 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$154 | Average$471 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$160 | Average$403 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$193 | Average$348 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$222 | Average$548 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$223 | Average$379 | FlexibilityNo cancel fee | On-time71% |