$103+ Cheap flights from Chicago (CHI) to Ontario
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
Sep 29 — Oct 61
Round-trip
1 adult, Economy
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Find cheap flights from Chicago 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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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 Chicago to Ontario
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Cheapest flights from Chicago to OntarioExplore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 30, 2026.
Explore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 30, 2026.
This Kissandfly.com deal was found by Cheapflights users on 8/28. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:40 pm -
Nonstop1h 46m
Sun 9/208:50 am -
Nonstop2h 03m
Deal found 8/28![Air Canada logo]()
$232
This FlightHub deal was found by Cheapflights users on 8/27. 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.
Fri 9/2511:45 am -
Nonstop1h 40m
Fri 10/21:45 pm -
Nonstop1h 50m
Deal found 8/27![Multiple Airlines logo]()
$233
This Mytrip deal was found by Cheapflights users on 8/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:25 am -
Nonstop1h 53m
Sat 10/177:35 pm -
Nonstop2h 06m
Deal found 8/27![Air Canada logo]()
$233
This Mytrip deal was found by Cheapflights users on 8/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1011:05 am -
1 stop5h 28m
Sat 10/1712:25 pm -
Nonstop1h 58m
Deal found 8/25![Air Canada logo]()
$233
This oojo deal was found by Cheapflights users on 8/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/213:20 pm -
Nonstop1h 40m
Mon 9/281:45 pm -
Nonstop1h 50m
Deal found 8/28![Porter Airlines logo]()
$234
This Kissandfly.com deal was found by Cheapflights users on 8/26. 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.
Thu 9/178:50 am -
Nonstop1h 59m
Sun 9/208:50 am -
Nonstop2h 03m
Deal found 8/26![Lufthansa logo]()
$234
This Booking.com deal was found by Cheapflights users on 8/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:25 am -
Nonstop1h 42m
Tue 10/67:35 pm -
Nonstop2h 06m
Deal found 8/25![Air Canada logo]()
$235
This Flybillet deal was found by Cheapflights users on 8/26. 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 Flybillet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:40 pm -
Nonstop1h 46m
Mon 9/217:40 am -
Nonstop1h 55m
Deal found 8/26![Air Canada logo]()
$235
This Flightnetwork deal was found by Cheapflights users on 8/26. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1011:45 am -
Nonstop1h 40m
Sat 10/171:45 pm -
Nonstop1h 50m
Deal found 8/26![Multiple Airlines logo]()
$236
This Mytrip deal was found by Cheapflights users on 8/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/199:45 am -
Nonstop1h 45m
Sun 9/2012:25 pm -
Nonstop1h 58m
Deal found 8/28![Air Canada logo]()
$236
This Super.com deal was found by Cheapflights users on 8/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:20 pm -
Nonstop1h 40m
Tue 10/201:45 pm -
Nonstop1h 50m
Deal found 8/27![Porter Airlines logo]()
$237
This Air Canada deal was found by Cheapflights users on 8/27. 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.
Fri 10/27:25 am -
Nonstop1h 42m
Sun 10/412:15 pm -
Nonstop2h 06m
Deal found 8/27![Air Canada logo]()
$237
Best flights from Chicago to OntarioDiscover carefully curated flight deals from Chicago to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 30, 2026.
Discover carefully curated flight deals from Chicago to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 30, 2026.
This United deal was found by Cheapflights users on 8/26. 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.
Wed 9/165:00 am -
1 stop5h 43m
Wed 9/162:00 pm -
Nonstop1h 55m
Deal found 8/26![Multiple Airlines logo]()
$239
This FlightHub deal was found by Cheapflights users on 8/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:20 pm -
Nonstop1h 40m
Sun 10/1110:10 am -
Nonstop1h 50m
Deal found 8/25![Porter Airlines logo]()
$241
This United Airlines deal was found by Cheapflights users on 8/27. 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.
Thu 9/1712:59 pm -
Nonstop1h 47m
Sun 9/2011:00 am -
Nonstop2h 00m
Deal found 8/27![United Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 8/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:40 pm -
1 stop3h 19m
Sun 9/209:45 am -
1 stop3h 54m
Deal found 8/28![Delta logo]()
$279
This KAYAK deal was found by Cheapflights users on 8/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/51:55 pm -
1 stop6h 35m
Thu 10/88:20 am -
1 stop4h 40m
Deal found 8/25![Air Canada logo]()
$394
This United deal was found by Cheapflights users on 8/28. 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.
Sun 9/209:18 pm -
Nonstop1h 41m
Mon 9/217:40 am -
Nonstop1h 55m
Deal found 8/28![Multiple Airlines logo]()
$254
This Porter Airlines deal was found by Cheapflights users on 8/26. 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.
Fri 10/211:45 am -
Nonstop1h 40m
Tue 10/610:10 am -
Nonstop1h 50m
Deal found 8/26![Porter Airlines logo]()
$265
This Delta deal was found by Cheapflights users on 8/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:55 am -
1 stop5h 20m
Sun 9/209:45 am -
1 stop4h 14m
Deal found 8/25![Delta logo]()
$280
This United Airlines deal was found by Cheapflights users on 8/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:54 am -
1 stop7h 08m
Sat 10/177:00 am -
Nonstop2h 00m
Deal found 8/25![United Airlines logo]()
$284
This United deal was found by Cheapflights users on 8/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:55 pm -
1 stop9h 59m
Sun 9/278:05 am -
Nonstop1h 55m
Deal found 8/27![Multiple Airlines logo]()
$264
This Super.com deal was found by Cheapflights users on 8/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/163:20 pm -
Nonstop1h 40m
Sat 9/191:45 pm -
Nonstop1h 50m
Deal found 8/28![Porter Airlines logo]()
$268
This Delta deal was found by Cheapflights users on 8/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:29 am -
1 stop6h 51m
Tue 9/296:00 am -
1 stop4h 07m
Deal found 8/25![Delta logo]()
$280
This Trip.com deal was found by Cheapflights users on 8/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:45 am -
Nonstop1h 40m
Sat 10/101:45 pm -
Nonstop1h 50m
Deal found 8/25![Porter Airlines logo]()
$270
This Mytrip deal was found by Cheapflights users on 8/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/115:30 pm -
1 stop22h 45m
Sun 10/186:10 pm -
1 stop23h 30m
Deal found 8/27![WestJet logo]()
$704
This American Airlines deal was found by Cheapflights users on 8/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/48:03 am -
1 stop5h 52m
Sat 10/247:00 am -
2 stops14h 06m
Deal found 8/25![American Airlines logo]()
$711
This Delta deal was found by Cheapflights users on 8/27. 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.
Wed 10/77:00 am -
1 stop3h 19m
Wed 10/149:40 am -
1 stop7h 52m
Deal found 8/27![Delta logo]()
$299
This Super.com deal was found by Cheapflights users on 8/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:20 pm -
Nonstop1h 40m
Fri 10/21:45 pm -
Nonstop1h 50m
Deal found 8/28![Porter Airlines logo]()
$272
This United Airlines deal was found by Cheapflights users on 8/28. 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 9/257:09 am -
Nonstop1h 45m
Mon 9/287:00 am -
Nonstop2h 00m
Deal found 8/28![United Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 8/26. 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.
Sat 10/101:55 pm -
1 stop8h 01m
Sat 10/176:00 am -
1 stop7h 59m
Deal found 8/26![Delta logo]()
$299
This United deal was found by Cheapflights users on 8/29. 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 9/198:45 am -
1 stop4h 34m
Sun 9/2012:25 pm -
Nonstop1h 58m
Deal found 8/29![Multiple Airlines logo]()
$350
This Delta deal was found by Cheapflights users on 8/27. 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 10/21:55 pm -
1 stop8h 04m
Sun 10/412:08 pm -
1 stop7h 18m
Deal found 8/27![Delta logo]()
$299
This KAYAK deal was found by Cheapflights users on 8/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/213:20 pm -
Nonstop1h 40m
Wed 9/231:45 pm -
Nonstop1h 50m
Deal found 8/25![Porter Airlines logo]()
$300
This United Airlines deal was found by Cheapflights users on 8/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1110:50 am -
1 stop7h 12m
Mon 9/2111:00 am -
Nonstop2h 00m
Deal found 8/25![United Airlines logo]()
$364
This Delta deal was found by Cheapflights users on 8/26. 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.
Mon 10/59:29 am -
1 stop6h 51m
Wed 10/76:00 am -
1 stop4h 17m
Deal found 8/26![Delta logo]()
$299
This KAYAK deal was found by Cheapflights users on 8/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2111:45 am -
Nonstop1h 40m
Thu 9/2410:10 am -
Nonstop1h 50m
Deal found 8/26![Porter Airlines logo]()
$300
This KAYAK deal was found by Cheapflights users on 8/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/212:00 pm -
Nonstop1h 42m
Thu 9/2412:15 pm -
Nonstop2h 06m
Deal found 8/25![Multiple Airlines logo]()
$364
This United Airlines deal was found by Cheapflights users on 8/28. 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 9/2512:55 pm -
1 stop4h 56m
Mon 9/2812:15 pm -
Nonstop2h 06m
Deal found 8/28![United Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 8/26. 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 10/71:27 pm -
1 stop8h 29m
Wed 10/142:26 pm -
1 stop4h 34m
Deal found 8/26![Delta logo]()
$299
This Trip.com deal was found by Cheapflights users on 8/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/113:20 pm -
Nonstop1h 40m
Sun 10/181:45 pm -
Nonstop1h 50m
Deal found 8/27![Porter Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Sun 10/117:11 am -
Nonstop2h 29m
Thu 10/159:45 am -
Nonstop2h 36m
Deal found 8/28![United Airlines logo]()
$375
Last-minute flights from Chicago to OntarioDiscover last-minute flight deals from Chicago to Ontario. Data last updated August 30, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Ontario. Data last updated August 30, 2026 and is based on user searches.
This United deal was found by Cheapflights users on 8/26. 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.
Wed 9/165:00 am -
1 stop5h 43m
Wed 9/162:00 pm -
Nonstop1h 55m
Deal found 8/26![Multiple Airlines logo]()
$239
This Kissandfly.com deal was found by Cheapflights users on 8/26. 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.
Thu 9/178:50 am -
Nonstop1h 59m
Sun 9/208:50 am -
Nonstop2h 03m
Deal found 8/26![Lufthansa logo]()
$234
This Air Canada deal was found by Cheapflights users on 8/27. 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.
Thu 9/178:45 am -
1 stop5h 48m
Thu 9/176:50 pm -
Nonstop1h 58m
Deal found 8/27![Air Canada logo]()
$238
This Kissandfly.com deal was found by Cheapflights users on 8/26. 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.
Thu 9/178:45 am -
1 stop5h 48m
Sun 9/207:00 am -
Nonstop2h 00m
Deal found 8/26![Air Canada logo]()
$241
This Kissandfly.com deal was found by Cheapflights users on 8/28. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:40 pm -
Nonstop1h 46m
Sun 9/208:50 am -
Nonstop2h 03m
Deal found 8/28![Air Canada logo]()
$232
This Flybillet deal was found by Cheapflights users on 8/26. 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 Flybillet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:40 pm -
Nonstop1h 46m
Mon 9/217:40 am -
Nonstop1h 55m
Deal found 8/26![Air Canada logo]()
$235
This Kissandfly.com deal was found by Cheapflights users on 8/29. 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.
Sat 9/198:45 am -
1 stop7h 08m
Sun 9/207:00 am -
Nonstop2h 00m
Deal found 8/29![Air Canada logo]()
$233
This oojo deal was found by Cheapflights users on 8/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/213:20 pm -
Nonstop1h 40m
Mon 9/281:45 pm -
Nonstop1h 50m
Deal found 8/28![Porter Airlines logo]()
$234
This Air Canada deal was found by Cheapflights users on 8/27. 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.
Thu 9/247:25 am -
Nonstop1h 42m
Thu 10/110:45 am -
1 stop5h 07m
Deal found 8/27![Air Canada logo]()
$237
This FlightHub deal was found by Cheapflights users on 8/27. 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.
Fri 9/2511:45 am -
Nonstop1h 40m
Fri 10/21:45 pm -
Nonstop1h 50m
Deal found 8/27![Multiple Airlines logo]()
$233
This Booking.com deal was found by Cheapflights users on 8/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:25 am -
Nonstop1h 42m
Tue 10/67:35 pm -
Nonstop2h 06m
Deal found 8/25![Air Canada logo]()
$235
This Air Canada deal was found by Cheapflights users on 8/27. 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.
Wed 9/308:40 pm -
Nonstop1h 46m
Mon 10/52:00 pm -
Nonstop1h 55m
Deal found 8/27![Air Canada logo]()
$237
One-way flights from Chicago to OntarioSearch for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Data last updated August 30, 2026.
Search for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Data last updated August 30, 2026.
This Trip.com deal was found by Cheapflights users on 8/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:20 pm -
Nonstop1h 40m
Deal found 8/27![Porter Airlines logo]()
$103
This Booking.com deal was found by Cheapflights users on 8/26. 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.
Tue 9/297:25 am -
Nonstop1h 42m
Deal found 8/26![Air Canada logo]()
$103
This Booking.com deal was found by Cheapflights users on 8/26. 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.
Tue 9/298:45 am -
1 stop7h 08m
Deal found 8/26![Air Canada logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/243:20 pm -
Nonstop1h 40m
Deal found 8/25![Porter Airlines logo]()
$104
This Air Canada deal was found by Cheapflights users on 8/27. 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.
Sat 9/263:40 pm -
1 stop5h 13m
Deal found 8/27![Air Canada logo]()
$104
This iWofly deal was found by Cheapflights users on 8/27. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:45 am -
1 stop6h 05m
Deal found 8/27![Air Canada logo]()
$105
This Air Canada deal was found by Cheapflights users on 8/27. 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.
Sun 10/113:40 pm -
1 stop5h 13m
Deal found 8/27![Air Canada logo]()
$105
This Mytrip deal was found by Cheapflights users on 8/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:25 am -
Nonstop1h 42m
Deal found 8/26![Air Canada logo]()
$106
This Mytrip deal was found by Cheapflights users on 8/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:20 pm -
Nonstop1h 46m
Deal found 8/26![Air Canada logo]()
$106
This Air Canada deal was found by Cheapflights users on 8/26. 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.
Sun 10/189:55 am -
Nonstop1h 45m
Deal found 8/26![Air Canada logo]()
$108
This Air Canada deal was found by Cheapflights users on 8/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/268:45 am -
1 stop6h 05m
Deal found 8/28![Air Canada logo]()
$109
This Air Canada deal was found by Cheapflights users on 8/27. 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.
Wed 9/303:40 pm -
1 stop6h 38m
Deal found 8/27![Air Canada logo]()
$109
Find flight deals from Chicago to Ontario
Keep the following information in mind while searching for Chicago to Ontario flight deals. Data was last updated August 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $232 (Kissandfly.com) |
One-way from | $103 (Trip.com) |
Popular in | August |
Cheapest in | March |
Average price | $311 |
Good round-trip deal | $207 or less |
Good one-way deal | $135 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago 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 August 30, 2026.
Use the filters below to find and compare flights from Chicago to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Wed 9/16
5:00 am-11:43 am
1 stop5h 43m
Toronto Pearson Intl
Wed 9/16
2:00 pm-2:55 pm
Nonstop1h 55m
$239
Quickest round-trip
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Wed 10/7
3:20 pm-6:00 pm
Nonstop1h 40m
Toronto Island
Sun 10/11
10:10 am-11:00 am
Nonstop1h 50m
$241
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Sun 9/20
9:18 pm-11:59 pm
Nonstop1h 41m
Toronto Pearson Intl
Mon 9/21
7:40 am-8:35 am
Nonstop1h 55m
$254
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Thu 9/24
12:55 pm-11:54 pm
1 stop9h 59m
Toronto Pearson Intl
Sun 9/27
8:05 am-9:00 am
Nonstop1h 55m
$264
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Fri 10/2
11:45 am-2:25 pm
Nonstop1h 40m
Toronto Island
Tue 10/6
10:10 am-11:00 am
Nonstop1h 50m
$265
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Wed 9/16
3:20 pm-6:00 pm
Nonstop1h 40m
Toronto Island
Sat 9/19
1:45 pm-2:35 pm
Nonstop1h 50m
$268
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Wed 10/7
11:45 am-2:25 pm
Nonstop1h 40m
Toronto Island
Sat 10/10
1:45 pm-2:35 pm
Nonstop1h 50m
$270
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Tue 9/29
3:20 pm-6:00 pm
Nonstop1h 40m
Toronto Island
Fri 10/2
1:45 pm-2:35 pm
Nonstop1h 50m
$272
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Thu 9/17
12:59 pm-3:46 pm
Nonstop1h 47m
Toronto Pearson Intl
Sun 9/20
11:00 am-12:00 pm
Nonstop2h 00m
$279
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Sat 9/19
6:40 pm-10:59 pm
1 stop3h 19m
Toronto Pearson Intl
Sun 9/20
9:45 am-12:39 pm
1 stop3h 54m
$279
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Chicago to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Chicago with our price prediction graph.
ORD-YTZ
ORD-YYZ
MDW-YTZ
ORD-YOW
ORD-YHM
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 Chicago to Ontario
CHI-CAON
ORD-YTZ
ORD-YYZ
MDW-YTZ
ORD-YOW
What is the cheapest month to book a flight from Chicago to Region of Ontario?
Currently, February is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of $285). Flying from Chicago to Region of Ontario in August is currently the most expensive (average of $369). 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 CHI to ON?
Find hourly flight availability from Chicago 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 August 30, 2026.
It’s optimal to fly from Chicago to Region of Ontario in the evening. By choosing this option you can save up to 24% on the cost of your flight, compared to a flight at noon.
Weekly flight availability from Chicago to Region of Ontario
Explore weekly flight availability from Chicago 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 August 30, 2026.
The most flights from CHI to CAON are scheduled on a Friday (69 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (57 on average).
How much does it cost to fly round-trip from Chicago to Region of Ontario?
Airfare is below average for this route at the moment.
Chicago to Region of Ontario flights typically cost between $263 and $381 in September.The cheapest round-trip price found within the last 5 days was $232 on Air Canada (Sep 18-Sep 20).
How far ahead should I book a flight from Chicago to Region of Ontario?
Booking 64 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to Region of Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from Chicago to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from Chicago to Ontario. Price data was last updated on August 22, 2026.
Travelers seeking maximum savings on their Chicago to Region of Ontario flight should consider departing on Saturday mornings when fares are most often at their lowest. Saturday 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 August 30, 2026.
See what other customers who have flown with Porter Airlines,Delta, andUnited Airlines from Chicago to Ontario have to say. 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.
Entertainment
6.9
Comfort
8.0
Food
7.6
Overall
8.0
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Comfort
8.0
Food
7.6
Overall
8.0
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Comfort
8.0
Food
7.6
Overall
8.0
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Comfort
8.0
Food
7.6
Overall
8.0
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Comfort
8.0
Food
7.6
Overall
8.0
Boarding
8.2
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Comfort
8.0
Food
7.6
Overall
8.0
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 Chicago to Ontario. 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 Chicago 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 Chicago to Ontario by cabin class
Find flights from Chicago to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Chicago and Ontario flights
Browse other Chicago and Ontario flight options. Last updated on August 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Chicago to Ontario flights
Consider these flights traveling from Chicago to Ontario.
Top 6 airlines flying from Chicago to Ontario
Discover the top 6 airlines that operate flights from Chicago 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 August 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$359 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$144 | Average$398 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$160 | Average$403 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$193 | Average$351 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$222 | Average$535 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$223 | Average$378 | FlexibilityNo cancel fee | On-time71% |