$131+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — ORD
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Illinois with Cheapflights
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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 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 September 10, 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 September 10, 2026.
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 10/211:00 am -
Nonstop2h 00m
Mon 10/57:09 am -
Nonstop1h 45m
Deal found 9/10![United Airlines logo]()
$205
This Kissandfly.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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:00 am -
Nonstop2h 00m
Sun 9/277:09 am -
Nonstop1h 45m
Deal found 9/10![Lufthansa logo]()
$206
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.
Fri 10/21:45 pm -
Nonstop1h 50m
Sun 10/43:20 pm -
Nonstop1h 40m
Deal found 9/9![Porter Airlines logo]()
$206
This Aunt Betty deal was found by Cheapflights users on 9/6. 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.
Wed 10/2110:20 am -
2 stops10h 52m
Wed 10/287:05 am -
2 stops10h 14m
Deal found 9/6![Air Canada logo]()
$206
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/251:45 pm -
Nonstop1h 50m
Fri 10/23:20 pm -
Nonstop1h 40m
Deal found 9/8![Porter Airlines logo]()
$207
This Kissandfly.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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:35 pm -
Nonstop2h 06m
Sun 9/277:25 am -
Nonstop1h 42m
Deal found 9/10![Air Canada logo]()
$207
This United deal was found by Cheapflights users on 9/5. 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 9/261:00 pm -
Nonstop2h 05m
Sun 9/273:40 pm -
1 stop5h 13m
Deal found 9/5![Multiple Airlines logo]()
$208
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:45 pm -
Nonstop1h 50m
Mon 9/2811:45 am -
Nonstop1h 40m
Deal found 9/9![Porter Airlines logo]()
$208
This flugladen.de 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:25 pm -
Nonstop1h 58m
Sun 9/273:40 pm -
1 stop6h 38m
Deal found 9/9![Air Canada logo]()
$209
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:10 am -
Nonstop1h 50m
Wed 10/2111:45 am -
Nonstop1h 40m
Deal found 9/8![Porter Airlines logo]()
$209
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.
Fri 10/162:00 pm -
Nonstop1h 55m
Sun 10/189:55 am -
Nonstop1h 45m
Deal found 9/8![Air Canada logo]()
$210
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.
Sat 10/2412:15 pm -
Nonstop2h 10m
Sat 10/311:55 pm -
1 stop6h 41m
Deal found 9/9![Air Canada logo]()
$210
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 September 10, 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 September 10, 2026.
This United Airlines deal was found by Cheapflights users on 9/6. 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 10/27:00 am -
Nonstop2h 00m
Mon 10/56:00 am -
1 stop4h 43m
Deal found 9/6![United Airlines logo]()
$213
This Air Canada deal was found by Cheapflights users on 9/5. 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 10/2412:15 pm -
Nonstop2h 10m
Fri 10/301:55 pm -
Nonstop1h 47m
Deal found 9/5![Air Canada logo]()
$233
This Cheapflightsfares deal was found by Cheapflights users on 9/6. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/251:45 pm -
Nonstop1h 50m
Sun 9/2711:45 am -
Nonstop1h 40m
Deal found 9/6![Porter Airlines logo]()
$236
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 9/244:05 pm -
1 stop5h 25m
Sun 9/278:55 am -
1 stop7h 25m
Deal found 9/10![Delta logo]()
$239
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 9/298:20 am -
1 stop4h 40m
Thu 10/17:25 am -
Nonstop1h 42m
Deal found 9/8![Multiple Airlines logo]()
$308
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.
Sun 12/1310:35 am -
Nonstop2h 05m
Thu 12/1712:20 pm -
Nonstop1h 46m
Deal found 9/9![Air Transat logo]()
$334
This United Airlines deal was found by Cheapflights users on 9/5. 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 10/18:50 am -
Nonstop1h 58m
Sun 10/45:00 am -
1 stop7h 47m
Deal found 9/5![United Airlines logo]()
$231
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:10 pm -
1 stop6h 50m
Sat 10/179:29 am -
1 stop6h 50m
Deal found 9/9![Delta logo]()
$239
This Porter Airlines 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2610:10 am -
Nonstop1h 50m
Sat 9/263:20 pm -
Nonstop1h 40m
Deal found 9/9![Porter Airlines logo]()
$243
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.
Sat 10/311:00 am -
Nonstop2h 00m
Sun 10/49:20 pm -
Nonstop1h 39m
Deal found 9/8![United Airlines logo]()
$233
This American Airlines deal was found by Cheapflights users on 9/5. 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 10/1310:57 am -
1 stop5h 51m
Sun 10/185:00 am -
1 stop6h 34m
Deal found 9/5![American Airlines logo]()
$518
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.
Thu 10/2212:10 pm -
1 stop6h 50m
Thu 10/299:29 am -
1 stop3h 07m
Deal found 9/8![Delta logo]()
$239
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2410:10 am -
Nonstop1h 50m
Sun 9/2711:45 am -
Nonstop1h 40m
Deal found 9/10![Porter Airlines logo]()
$246
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.
Fri 11/2010:53 am -
Nonstop2h 04m
Sun 11/229:21 pm -
Nonstop1h 38m
Deal found 9/8![United Airlines logo]()
$233
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 9/246:00 am -
1 stop4h 07m
Sun 9/279:29 am -
1 stop6h 51m
Deal found 9/10![Delta logo]()
$239
This Air Canada deal was found by Cheapflights users on 9/5. 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 11/209:10 am -
1 stop5h 03m
Mon 11/231:55 pm -
1 stop4h 51m
Deal found 9/5![Air Canada logo]()
$290
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.
Tue 9/298:20 am -
1 stop4h 40m
Sun 10/42:00 pm -
Nonstop1h 48m
Deal found 9/9![Multiple Airlines logo]()
$308
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.
Thu 9/241:00 pm -
Nonstop2h 05m
Sun 9/274:33 pm -
Nonstop2h 04m
Deal found 9/10![United Airlines logo]()
$234
This Air Canada deal was found by Cheapflights users on 9/5. 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.
Thu 11/191:10 pm -
1 stop5h 33m
Mon 11/231:55 pm -
1 stop4h 51m
Deal found 9/5![Air Canada logo]()
$290
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.
Thu 10/11:45 pm -
Nonstop1h 50m
Wed 3/311:15 am -
Nonstop1h 42m
Deal found 9/10![Porter Airlines logo]()
$264
This Delta deal was found by Cheapflights users on 9/6. 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 10/132:26 pm -
1 stop7h 04m
Tue 10/205:29 pm -
1 stop4h 27m
Deal found 9/6![Delta logo]()
$244
This United Airlines deal was found by Cheapflights users on 9/5. 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.
Sat 10/247:00 pm -
1 stop5h 21m
Fri 10/304:40 pm -
1 stop5h 46m
Deal found 9/5![United Airlines logo]()
$237
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.
Sat 10/310:10 am -
Nonstop1h 50m
Wed 3/311:15 am -
Nonstop1h 42m
Deal found 9/10![Porter Airlines logo]()
$264
This United deal was found by Cheapflights users on 9/6. 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 10/17:35 pm -
Nonstop2h 06m
Sun 10/41:55 pm -
1 stop6h 35m
Deal found 9/6![Multiple Airlines logo]()
$322
This Delta deal was found by Cheapflights users on 9/6. 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 10/2212:10 pm -
1 stop7h 19m
Sun 10/255:29 pm -
1 stop4h 27m
Deal found 9/6![Delta logo]()
$244
This WestJet deal was found by Cheapflights users on 9/5. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:10 pm -
1 stop23h 30m
Mon 10/195:30 pm -
1 stop22h 45m
Deal found 9/5![WestJet logo]()
$736
This Air Canada deal was found by Cheapflights users on 9/5. 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.
Thu 3/41:10 pm -
Nonstop2h 42m
Sun 3/73:45 pm -
Nonstop2h 11m
Deal found 9/5![Air Canada logo]()
$305
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:30 am -
1 stop6h 24m
Thu 10/87:09 am -
Nonstop1h 45m
Deal found 9/9![United Airlines logo]()
$239
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.
Sat 10/310:10 am -
Nonstop1h 50m
Sun 3/75:35 pm -
Nonstop1h 42m
Deal found 9/10![Porter Airlines logo]()
$264
This Delta deal was found by Cheapflights users on 9/5. 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 10/312:08 pm -
1 stop7h 14m
Sat 10/101:27 pm -
1 stop8h 29m
Deal found 9/5![Delta logo]()
$245
Last-minute flights from Ontario to IllinoisDiscover last-minute flight deals from Ontario to Illinois. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Illinois. Data last updated September 10, 2026 and is based on user searches.
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:45 pm -
Nonstop1h 50m
Mon 9/2811:45 am -
Nonstop1h 40m
Deal found 9/9![Porter Airlines logo]()
$208
This Kissandfly.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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:00 am -
Nonstop2h 00m
Sun 9/277:09 am -
Nonstop1h 45m
Deal found 9/10![Lufthansa logo]()
$206
This Kissandfly.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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:35 pm -
Nonstop2h 06m
Sun 9/277:25 am -
Nonstop1h 42m
Deal found 9/10![Air Canada logo]()
$207
This flugladen.de 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:25 pm -
Nonstop1h 58m
Sun 9/273:40 pm -
1 stop6h 38m
Deal found 9/9![Air Canada logo]()
$209
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/251:45 pm -
Nonstop1h 50m
Fri 10/23:20 pm -
Nonstop1h 40m
Deal found 9/8![Porter Airlines logo]()
$207
This United deal was found by Cheapflights users on 9/5. 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 9/261:00 pm -
Nonstop2h 05m
Sun 9/273:40 pm -
1 stop5h 13m
Deal found 9/5![Multiple Airlines logo]()
$208
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 10/211:00 am -
Nonstop2h 00m
Mon 10/57:09 am -
Nonstop1h 45m
Deal found 9/10![United Airlines logo]()
$205
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.
Fri 10/21:45 pm -
Nonstop1h 50m
Sun 10/43:20 pm -
Nonstop1h 40m
Deal found 9/9![Porter Airlines logo]()
$206
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.
Fri 10/162:00 pm -
Nonstop1h 55m
Sun 10/189:55 am -
Nonstop1h 45m
Deal found 9/8![Air Canada logo]()
$210
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:10 am -
Nonstop1h 50m
Wed 10/2111:45 am -
Nonstop1h 40m
Deal found 9/8![Porter Airlines logo]()
$209
This Aunt Betty deal was found by Cheapflights users on 9/6. 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.
Wed 10/2110:20 am -
2 stops10h 52m
Wed 10/287:05 am -
2 stops10h 14m
Deal found 9/6![Air Canada logo]()
$206
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.
Sat 10/2412:15 pm -
Nonstop2h 10m
Sat 10/311:55 pm -
1 stop6h 41m
Deal found 9/9![Air Canada logo]()
$210
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 September 10, 2026.
Search for one-way flight options from Ontario to Illinois. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Flightnetwork 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:00 am -
1 stop5h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Air Canada logo]()
$131
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2410:10 am -
Nonstop1h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Porter Airlines logo]()
$131
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:35 pm -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Porter Airlines logo]()
$131
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.
Thu 9/242:00 pm -
Nonstop1h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Air Canada logo]()
$132
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/131:45 pm -
Nonstop1h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Porter Airlines logo]()
$132
This Mytrip deal was found by Cheapflights users on 9/5. 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.
Wed 9/307:35 pm -
Nonstop2h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Air Canada logo]()
$132
This Air Canada deal was found by Cheapflights users on 9/5. 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 10/134:00 pm -
1 stop5h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Air Canada logo]()
$133
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.
Wed 9/2310:10 am -
Nonstop1h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Porter Airlines logo]()
$133
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.
Sat 10/312:30 pm -
1 stop8h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Air Canada logo]()
$133
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:45 pm -
Nonstop1h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Porter Airlines logo]()
$134
This Air Canada deal was found by Cheapflights users on 9/6. 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 10/612:15 pm -
Nonstop2h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Air Canada logo]()
$134
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.
Thu 9/241:45 pm -
Nonstop1h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Air Transat logo]()
$135
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $206 (Kissandfly.com) |
One-way from | $131 (Flightnetwork) |
Popular in | October |
Cheapest in | February |
Average price | $264 |
Good round-trip deal | $230 or less |
Good one-way deal | $173 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 September 10, 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
Quickest round-trip
TorontoChicago
YTZ Toronto Island - MDW Chicago Midway
YTZMDW
Toronto Island
Tue 10/20
1:45 pm-2:35 pm
Nonstop1h 50m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$132
TorontoChicago
YTZ Toronto Island - MDW Chicago Midway
YTZMDW
Toronto Island
Tue 10/13
1:45 pm-2:35 pm
Nonstop1h 50m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$132
TorontoChicago
YTZ Toronto Island - MDW Chicago Midway
YTZMDW
Toronto Island
Tue 9/29
1:45 pm-2:35 pm
Nonstop1h 50m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$133
TorontoChicago
YTZ Toronto Island - MDW Chicago Midway
YTZMDW
Toronto Island
Fri 10/16
1:45 pm-2:35 pm
Nonstop1h 50m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$133
TorontoChicago
YTZ Toronto Island - MDW Chicago Midway
YTZMDW
Toronto Island
Sun 9/27
10:10 am-11:00 am
Nonstop1h 50m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$141
TorontoChicago
YTZ Toronto Island - MDW Chicago Midway
YTZMDW
Toronto Island
Thu 10/1
1:45 pm-2:35 pm
Nonstop1h 50m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$143
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Fri 9/25
1:00 pm-2:05 pm
Nonstop2h 05m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$144
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Sun 12/6
6:00 am-1:59 pm
1 stop8h 59m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$147
TorontoChicago
YTZ Toronto Island - ORD Chicago O'Hare Intl
YTZORD
Toronto Island
Sat 10/10
12:15 pm-1:25 pm
Nonstop2h 10m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$148
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Mon 10/5
7:00 pm-11:21 pm
1 stop5h 21m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$148
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-MDW
YTZ-ORD
YYZ-STL
YOW-ORD
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-MDW
YTZ-ORD
YYZ-STL
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 $255). Flying from Region of Ontario to Illinois in December is currently the most expensive (average of $325). 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 September 10, 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 33% on airfare.
Weekly flight availability from Region of Ontario to Illinois
Explore weekly flight availability from Ontario to Illinois. 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 10, 2026.
The most flights from CAON to USIL are scheduled on a Wednesday (67 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (31 on average).
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 $234 and $437 in October.The cheapest round-trip price found within the last 5 days was $205 on United Airlines (Oct 2-Oct 4).
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 September 5, 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. Friday afternoons 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 September 10, 2026.
See what other customers who have flown with Porter Airlines,United Airlines, andAmerican Airlines from Ontario to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
6.9
Boarding
8.2
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
6.9
Boarding
8.2
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
6.9
Boarding
8.2
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
6.9
Boarding
8.2
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
6.9
Boarding
8.2
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 September 10, 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 September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$509 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$168 | Average$384 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$190 | Average$504 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$193 | Average$310 | FlexibilityNo cancel fee | On-time71% |