$98+ Cheap flights from Chicago (CHI) 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 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
Nov 29 — Dec 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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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 October 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 October 30, 2026.
This Flightnetwork deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1912:15 pm -
Nonstop1h 45m
Sun 11/228:30 am -
1 stop7h 32m
Deal found 10/26![Multiple Airlines logo]()
$226
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/191:55 pm -
Nonstop1h 47m
Sun 11/2210:45 am -
1 stop5h 17m
Deal found 10/26![Air Canada logo]()
$230
This Kissandfly.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:20 pm -
Nonstop1h 45m
Sun 12/610:29 am -
Nonstop2h 05m
Deal found 10/27![Porter Airlines logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:15 pm -
Nonstop1h 45m
Tue 12/14:35 pm -
Nonstop2h 05m
Deal found 10/27![Porter Airlines logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:20 pm -
Nonstop1h 45m
Thu 11/264:35 pm -
Nonstop2h 05m
Deal found 10/27![Porter Airlines logo]()
$234
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:20 pm -
Nonstop1h 45m
Wed 12/910:29 am -
Nonstop2h 05m
Deal found 10/27![Porter Airlines logo]()
$236
This Trip.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1712:15 pm -
Nonstop1h 45m
Thu 11/1910:30 am -
Nonstop2h 05m
Deal found 10/26![Porter Airlines logo]()
$237
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:45 am -
Nonstop1h 42m
Sun 12/68:05 am -
Nonstop2h 03m
Deal found 10/26![Air Canada logo]()
$238
This Trip.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/312:15 pm -
Nonstop1h 45m
Mon 12/710:29 am -
Nonstop2h 05m
Deal found 10/27![Porter Airlines logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2412:15 pm -
Nonstop1h 45m
Wed 1/610:35 am -
Nonstop2h 05m
Deal found 10/26![Porter Airlines logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:20 pm -
Nonstop1h 45m
Wed 12/210:29 am -
Nonstop2h 05m
Deal found 10/26![Porter Airlines logo]()
$241
This flugladen.de deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/118:50 pm -
Nonstop1h 42m
Fri 12/186:55 pm -
Nonstop2h 03m
Deal found 10/27![Air Canada logo]()
$272
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 October 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 October 30, 2026.
This Flightnetwork deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1912:15 pm -
Nonstop1h 45m
Sun 11/228:30 am -
1 stop7h 32m
Deal found 10/26![Multiple Airlines logo]()
$226
This Kissandfly.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:20 pm -
Nonstop1h 45m
Sun 12/610:29 am -
Nonstop2h 05m
Deal found 10/27![Porter Airlines logo]()
$235
This Delta deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/247:05 am -
1 stop5h 25m
Tue 12/12:25 pm -
1 stop5h 01m
Deal found 10/25![Delta logo]()
$303
This Air Canada deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/231:55 pm -
Nonstop1h 47m
Wed 11/2510:45 am -
1 stop5h 17m
Deal found 10/30![Air Canada logo]()
$374
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/253:47 pm -
Nonstop1h 58m
Wed 12/210:53 am -
Nonstop2h 04m
Deal found 10/26![United Airlines logo]()
$374
This Porter Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:20 pm -
Nonstop1h 45m
Fri 12/410:30 am -
Nonstop2h 05m
Deal found 10/25![Porter Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/41:35 pm -
1 stop4h 32m
Sun 3/79:45 am -
1 stop7h 52m
Deal found 10/27![Delta logo]()
$303
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:39 am -
1 stop7h 41m
Sun 12/612:15 pm -
1 stop7h 11m
Deal found 10/26![Delta logo]()
$303
This Trip.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:15 pm -
Nonstop1h 45m
Fri 11/2010:29 am -
Nonstop2h 05m
Deal found 10/28![Porter Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/166:41 pm -
1 stop3h 26m
Tue 1/56:10 am -
1 stop8h 07m
Deal found 10/26![Delta logo]()
$303
This Air Canada deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/301:55 pm -
Nonstop1h 47m
Fri 12/48:30 am -
1 stop7h 32m
Deal found 10/30![Air Canada logo]()
$374
This United Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/293:47 pm -
Nonstop1h 58m
Thu 12/37:26 pm -
Nonstop2h 22m
Deal found 10/27![United Airlines logo]()
$374
This United deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/239:21 pm -
Nonstop1h 38m
Wed 11/252:35 pm -
Nonstop2h 03m
Deal found 10/28![Multiple Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/139:30 am -
1 stop6h 52m
Sat 4/179:45 am -
1 stop3h 48m
Deal found 10/27![Delta logo]()
$303
This Justfly.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/106:20 pm -
Nonstop1h 40m
Tue 2/164:35 pm -
Nonstop1h 55m
Deal found 10/30![Porter Airlines logo]()
$343
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1811:07 am -
Nonstop1h 56m
Sun 2/2110:53 am -
Nonstop2h 07m
Deal found 10/26![United Airlines logo]()
$379
This American Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2011:48 am -
1 stop5h 10m
Sun 4/257:00 am -
2 stops13h 57m
Deal found 10/26![American Airlines logo]()
$841
This United deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:55 am -
1 stop4h 53m
Thu 11/261:00 pm -
1 stop7h 52m
Deal found 10/27![Multiple Airlines logo]()
$393
This KAYAK deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/161:55 pm -
Nonstop1h 47m
Tue 11/178:20 am -
2 stops7h 42m
Deal found 10/27![Air Canada logo]()
$428
This United Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/33:47 pm -
Nonstop1h 58m
Sun 12/67:26 pm -
Nonstop2h 22m
Deal found 10/27![United Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/189:30 am -
1 stop5h 34m
Sun 2/2112:15 pm -
1 stop7h 22m
Deal found 10/27![Delta logo]()
$341
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:17 pm -
Nonstop1h 58m
Sun 11/1510:53 am -
Nonstop2h 04m
Deal found 10/30![United Airlines logo]()
$396
This KAYAK deal was found by Cheapflights users on 10/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/301:55 pm -
Nonstop1h 47m
Thu 12/38:20 am -
2 stops7h 42m
Deal found 10/29![Air Canada logo]()
$446
This oojo deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:44 pm -
2 stops27h 56m
Tue 11/245:30 am -
2 stops29h 16m
Deal found 10/27![WestJet logo]()
$1,113
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/119:30 am -
1 stop3h 00m
Wed 11/252:20 pm -
1 stop4h 44m
Deal found 10/26![Delta logo]()
$351
This KAYAK deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:15 pm -
Nonstop1h 45m
Tue 11/1710:29 am -
Nonstop2h 05m
Deal found 10/27![Porter Airlines logo]()
$425
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/251:57 pm -
Nonstop1h 50m
Sun 11/296:45 am -
Nonstop2h 09m
Deal found 10/26![United Airlines logo]()
$398
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:44 pm -
1 stop3h 13m
Tue 11/246:00 am -
1 stop7h 51m
Deal found 10/26![Delta logo]()
$351
This KAYAK deal was found by Cheapflights users on 10/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/112:15 pm -
Nonstop1h 45m
Thu 12/34:35 pm -
Nonstop2h 05m
Deal found 10/29![Porter Airlines logo]()
$434
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/35:02 pm -
2 stops15h 37m
Sun 12/67:10 pm -
2 stops21h 56m
Deal found 10/29![Multiple Airlines logo]()
$536
Last-minute flights from Chicago to OntarioDiscover last-minute flight deals from Chicago to Ontario. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Ontario. Data last updated October 30, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:15 pm -
Nonstop1h 45m
Wed 11/1810:29 am -
Nonstop2h 05m
Deal found 10/26![Porter Airlines logo]()
$236
This Justfly.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/166:20 pm -
Nonstop1h 45m
Mon 11/234:35 pm -
Nonstop2h 05m
Deal found 10/26![Porter Airlines logo]()
$254
This Air Canada deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:40 pm -
Nonstop1h 43m
Mon 11/236:55 pm -
Nonstop2h 03m
Deal found 10/26![Air Canada logo]()
$277
This Trip.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1712:15 pm -
Nonstop1h 45m
Thu 11/1910:30 am -
Nonstop2h 05m
Deal found 10/26![Porter Airlines logo]()
$237
This Air Canada deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/188:45 am -
Nonstop1h 42m
Sun 11/222:35 pm -
Nonstop2h 03m
Deal found 10/27![Air Canada logo]()
$278
This American Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:19 am -
1 stop4h 51m
Sun 11/221:16 pm -
Nonstop2h 20m
Deal found 10/27![American Airlines logo]()
$287
This Flightnetwork deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1912:15 pm -
Nonstop1h 45m
Sun 11/228:30 am -
1 stop7h 32m
Deal found 10/26![Multiple Airlines logo]()
$226
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/191:55 pm -
Nonstop1h 47m
Sun 11/2210:45 am -
1 stop5h 17m
Deal found 10/26![Air Canada logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:20 pm -
Nonstop1h 45m
Thu 11/264:35 pm -
Nonstop2h 05m
Deal found 10/27![Porter Airlines logo]()
$234
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2310:15 am -
Nonstop1h 37m
Mon 11/3011:00 pm -
1 stop13h 07m
Deal found 10/26![Air Canada logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:15 pm -
Nonstop1h 45m
Tue 12/14:35 pm -
Nonstop2h 05m
Deal found 10/27![Porter Airlines logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:20 pm -
Nonstop1h 45m
Wed 12/210:29 am -
Nonstop2h 05m
Deal found 10/26![Porter Airlines logo]()
$241
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 October 30, 2026.
Search for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Trip.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/226:20 pm -
Nonstop1h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Porter Airlines logo]()
$98
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2312:20 pm -
Nonstop1h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Porter Airlines logo]()
$99
This Trip.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1012:15 pm -
Nonstop1h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Porter Airlines logo]()
$101
This Booking.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/272:00 pm -
Nonstop1h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Air Canada logo]()
$102
This Booking.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2712:50 pm -
Nonstop1h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Air Canada logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1212:15 pm -
Nonstop1h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Porter Airlines logo]()
$103
This Mytrip deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/258:45 am -
Nonstop1h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Air Canada logo]()
$103
This Mytrip deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/188:45 am -
Nonstop1h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Air Canada logo]()
$104
This Kissandfly.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:00 am -
Nonstop1h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![British Airways logo]()
$105
This FlightHub deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2412:15 pm -
Nonstop1h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Air Transat logo]()
$107
This Justfly.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:20 pm -
Nonstop1h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Air Transat logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:15 pm -
Nonstop1h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Porter Airlines 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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $226 (Flightnetwork) |
One-way from | $98 (Trip.com) |
Popular in | October |
Cheapest in | January |
Average price | $334 |
Good round-trip deal | $283 or less |
Good one-way deal | $139 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 October 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 11/18
7:05 am-11:19 am
1 stop3h 14m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$122
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Wed 11/25
2:44 pm-10:57 pm
1 stop7h 13m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$122
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Sat 12/12
2:41 pm-11:07 pm
1 stop7h 26m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$122
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Tue 12/1
11:39 am-5:20 pm
1 stop4h 41m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$122
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Mon 11/30
1:31 pm-10:57 pm
1 stop8h 26m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$122
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Tue 11/24
9:30 am-5:20 pm
1 stop6h 50m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$122
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Wed 11/18
9:30 am-1:30 pm
1 stop3h 00m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$122
ChicagoToronto
ORD Chicago O'Hare Intl - YTZ Toronto Island
ORDYTZ
Chicago O'Hare Intl
Mon 12/7
12:15 pm-3:00 pm
Nonstop1h 45m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$138
ChicagoToronto
ORD Chicago O'Hare Intl - YTZ Toronto Island
ORDYTZ
Chicago O'Hare Intl
Mon 11/16
12:15 pm-3:00 pm
Nonstop1h 45m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$154
ChicagoToronto
ORD Chicago O'Hare Intl - YTZ Toronto Island
ORDYTZ
Chicago O'Hare Intl
Fri 12/18
12:15 pm-3:00 pm
Nonstop1h 45m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$156
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-YYZ
ORD-YOW
MDW-YOW
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-YYZ
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 $295). Flying from Chicago to Region of Ontario in August is currently the most expensive (average of $366). 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 October 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 31% on the cost of your flight, compared to a flight at noon.
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 $324 and $502 in February.The cheapest round-trip price found within the last 5 days was $226 on Multiple Airlines (Feb 23-Feb 26).
How far ahead should I book a flight from Chicago to Region of Ontario?
Booking 71 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 October 24, 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. 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 October 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.
Overall
8.0
Crew
8.6
Entertainment
6.9
Food
7.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Crew
8.6
Entertainment
6.9
Food
7.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Crew
8.6
Entertainment
6.9
Food
7.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Crew
8.6
Entertainment
6.9
Food
7.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Crew
8.6
Entertainment
6.9
Food
7.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Crew
8.6
Entertainment
6.9
Food
7.6
Boarding
8.2
Comfort
8.0
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 October 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 October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$387 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$160 | Average$403 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$176 | Average$504 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$193 | Average$349 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$222 | Average$578 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$223 | Average$392 | FlexibilityNo cancel fee | On-time71% |