$110+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
Oct 30 — Nov 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 September 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 September 30, 2026.
This deal was found by Cheapflights users on 9/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:20 pm -
Nonstop1h 46m
Fri 10/304:35 pm -
Nonstop2h 05m
Deal found 9/28![Porter Airlines logo]()
$242
This deal was found by Cheapflights users on 9/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:45 am -
Nonstop1h 42m
Fri 10/308:20 am -
Nonstop2h 03m
Deal found 9/28![Air Canada logo]()
$250
This CheapOair deal was found by Cheapflights users on 9/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:20 pm -
Nonstop1h 46m
Tue 11/174:35 pm -
Nonstop2h 05m
Deal found 9/29![Air Transat logo]()
$283
This CheapOair deal was found by Cheapflights users on 9/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:20 pm -
Nonstop1h 46m
Sun 11/154:35 pm -
Nonstop2h 05m
Deal found 9/29![Air Transat logo]()
$284
This deal was found by Cheapflights users on 9/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:20 pm -
Nonstop1h 46m
Thu 11/1910:35 am -
Nonstop2h 05m
Deal found 9/28![Porter Airlines logo]()
$292
This Kissandfly.com deal was found by Cheapflights users on 9/26. 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.
Sat 10/38:03 am -
Nonstop1h 56m
Sun 10/48:05 am -
Nonstop1h 55m
Deal found 9/26![Air Canada logo]()
$293
This deal was found by Cheapflights users on 9/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/126:20 pm -
Nonstop1h 46m
Sun 12/134:35 pm -
Nonstop2h 05m
Deal found 9/29![Porter Airlines logo]()
$298
This Kissandfly.com deal was found by Cheapflights users on 9/30. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:29 pm -
Nonstop1h 56m
Sat 10/36:30 am -
Nonstop2h 06m
Deal found 9/30![British Airways logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:45 am -
Nonstop1h 40m
Sat 10/241:45 pm -
Nonstop1h 50m
Deal found 9/30![Porter Airlines logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/612:20 pm -
Nonstop1h 46m
Tue 11/104:35 pm -
Nonstop2h 05m
Deal found 9/29![Porter Airlines logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1312:20 pm -
Nonstop1h 46m
Fri 11/2010:35 am -
Nonstop2h 05m
Deal found 9/29![Porter Airlines logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2912:20 pm -
Nonstop1h 46m
Thu 11/510:35 am -
Nonstop2h 05m
Deal found 9/29![Porter Airlines logo]()
$318
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 September 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 September 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/59:30 am -
1 stop28h 50m
Wed 11/1112:20 pm -
2 stops21h 20m
Deal found 9/28![Multiple Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1911:45 am -
Nonstop1h 40m
Thu 10/221:45 pm -
Nonstop1h 50m
Deal found 9/29![Porter Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 9/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/285:05 pm -
1 stop4h 52m
Tue 12/19:45 am -
1 stop5h 11m
Deal found 9/29![Delta logo]()
$412
This United Airlines deal was found by Cheapflights users on 9/28. 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.
Tue 10/1312:59 pm -
Nonstop1h 47m
Tue 10/137:00 pm -
1 stop5h 21m
Deal found 9/28![United Airlines logo]()
$455
This Air Canada deal was found by Cheapflights users on 9/26. 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 10/251:55 pm -
Nonstop1h 47m
Thu 10/2910:45 am -
1 stop5h 07m
Deal found 9/26![Air Canada logo]()
$512
This Kiwi.com deal was found by Cheapflights users on 9/26. 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.
Sun 10/2510:20 am -
1 stop12h 35m
Sat 10/317:35 am -
1 stop27h 55m
Deal found 9/26![Multiple Airlines logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:45 am -
Nonstop1h 40m
Sat 10/2410:10 am -
Nonstop1h 50m
Deal found 9/28![Porter Airlines logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/159:40 am -
1 stop10h 15m
Sat 10/317:35 am -
1 stop27h 55m
Deal found 9/27![Multiple Airlines logo]()
$348
This American Airlines deal was found by Cheapflights users on 9/26. 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.
Fri 1/1511:45 am -
1 stop5h 13m
Mon 1/187:00 am -
1 stop7h 10m
Deal found 9/26![American Airlines logo]()
$794
This Delta deal was found by Cheapflights users on 9/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:05 am -
1 stop5h 25m
Sat 11/282:20 pm -
1 stop6h 57m
Deal found 9/29![Delta logo]()
$412
This FlightHub deal was found by Cheapflights users on 9/25. 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.
Sat 10/103:20 pm -
Nonstop1h 40m
Tue 10/131:45 pm -
Nonstop1h 50m
Deal found 9/25![Porter Airlines logo]()
$382
This Kiwi.com deal was found by Cheapflights users on 9/26. 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 10/229:40 am -
1 stop10h 15m
Sat 10/317:35 am -
1 stop27h 55m
Deal found 9/26![Multiple Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 9/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:29 am -
1 stop6h 50m
Sat 10/246:00 am -
1 stop7h 47m
Deal found 9/29![Delta logo]()
$412
This United Airlines deal was found by Cheapflights users on 9/26. 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 11/256:17 pm -
Nonstop1h 58m
Sat 11/286:45 am -
Nonstop2h 09m
Deal found 9/26![United Airlines logo]()
$464
This Porter Airlines deal was found by Cheapflights users on 9/30. 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/212:20 pm -
Nonstop1h 46m
Sun 11/1510:35 am -
Nonstop2h 05m
Deal found 9/30![Porter Airlines logo]()
$393
This oojo deal was found by Cheapflights users on 9/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:29 am -
2 stops13h 51m
Sun 11/15:30 am -
2 stops13h 30m
Deal found 9/26![WestJet logo]()
$973
This Porter Airlines deal was found by Cheapflights users on 9/30. 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/412:20 pm -
Nonstop1h 46m
Thu 11/1910:35 am -
Nonstop2h 05m
Deal found 9/30![Porter Airlines logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Sun 10/2510:20 am -
1 stop12h 35m
Tue 10/2711:30 pm -
2 stops34h 20m
Deal found 9/27![Multiple Airlines logo]()
$394
This Delta deal was found by Cheapflights users on 9/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:44 pm -
1 stop3h 12m
Sun 10/186:00 am -
1 stop4h 32m
Deal found 9/29![Delta logo]()
$448
This Porter Airlines deal was found by Cheapflights users on 9/29. 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:20 pm -
Nonstop1h 46m
Fri 12/410:35 am -
Nonstop2h 05m
Deal found 9/29![Porter Airlines logo]()
$394
This KAYAK deal was found by Cheapflights users on 9/29. 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.
Sun 11/11:55 pm -
Nonstop1h 47m
Tue 11/312:20 pm -
1 stop7h 10m
Deal found 9/29![Air Canada logo]()
$579
This Delta deal was found by Cheapflights users on 9/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:29 am -
1 stop6h 50m
Thu 10/226:00 am -
1 stop7h 47m
Deal found 9/29![Delta logo]()
$448
This KAYAK deal was found by Cheapflights users on 9/29. 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 11/21:55 pm -
Nonstop1h 47m
Tue 11/312:20 pm -
1 stop7h 10m
Deal found 9/29![Air Canada logo]()
$579
This Justfly.com deal was found by Cheapflights users on 9/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:20 pm -
Nonstop1h 40m
Mon 10/1910:10 am -
Nonstop1h 50m
Deal found 9/29![Porter Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 9/27. 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 11/115:05 pm -
1 stop4h 52m
Tue 11/172:20 pm -
1 stop5h 10m
Deal found 9/27![Delta logo]()
$468
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Sun 10/410:08 am -
2 stops34h 56m
Wed 10/289:35 am -
1 stop24h 15m
Deal found 9/27![Multiple Airlines logo]()
$470
This Trip.com deal was found by Cheapflights users on 9/25. 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.
Fri 10/163:20 pm -
Nonstop1h 40m
Sat 10/171:45 pm -
Nonstop1h 50m
Deal found 9/25![Porter Airlines logo]()
$405
This KAYAK deal was found by Cheapflights users on 9/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/91:55 pm -
Nonstop1h 47m
Fri 11/1312:20 pm -
1 stop7h 10m
Deal found 9/28![Air Canada logo]()
$600
This Delta deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1711:19 am -
1 stop5h 01m
Wed 11/256:00 am -
1 stop5h 39m
Deal found 9/27![Delta logo]()
$468
This Kiwi.com deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:34 pm -
1 stop21h 06m
Sun 11/152:25 pm -
1 stop28h 48m
Deal found 9/26![Multiple Airlines logo]()
$476
Last-minute flights from Chicago to OntarioDiscover last-minute flight deals from Chicago to Ontario. Data last updated September 30, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Ontario. Data last updated September 30, 2026 and is based on user searches.
This Kissandfly.com deal was found by Cheapflights users on 9/30. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:29 pm -
Nonstop1h 56m
Sat 10/36:30 am -
Nonstop2h 06m
Deal found 9/30![British Airways logo]()
$301
This Kissandfly.com deal was found by Cheapflights users on 9/26. 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.
Sat 10/38:03 am -
Nonstop1h 56m
Sun 10/48:05 am -
Nonstop1h 55m
Deal found 9/26![Air Canada logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/159:40 am -
1 stop10h 15m
Wed 10/289:35 am -
1 stop24h 15m
Deal found 9/27![Multiple Airlines logo]()
$320
This Trip.com deal was found by Cheapflights users on 9/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:20 pm -
Nonstop1h 40m
Thu 10/2210:10 am -
Nonstop1h 50m
Deal found 9/29![Porter Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:45 am -
Nonstop1h 40m
Sat 10/241:45 pm -
Nonstop1h 50m
Deal found 9/30![Porter Airlines logo]()
$315
This CheapOair deal was found by Cheapflights users on 9/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2612:20 pm -
Nonstop1h 46m
Tue 10/2710:35 am -
Nonstop2h 05m
Deal found 9/25![Air Transat logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:20 pm -
Nonstop1h 46m
Wed 10/2810:35 am -
Nonstop2h 05m
Deal found 9/29![Porter Airlines logo]()
$323
This deal was found by Cheapflights users on 9/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:20 pm -
Nonstop1h 46m
Fri 10/304:35 pm -
Nonstop2h 05m
Deal found 9/28![Porter Airlines logo]()
$242
This deal was found by Cheapflights users on 9/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:45 am -
Nonstop1h 42m
Fri 10/308:20 am -
Nonstop2h 03m
Deal found 9/28![Air Canada logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:20 pm -
Nonstop1h 46m
Sat 10/314:35 pm -
Nonstop2h 05m
Deal found 9/29![Porter Airlines logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2912:20 pm -
Nonstop1h 46m
Thu 11/510:35 am -
Nonstop2h 05m
Deal found 9/29![Porter Airlines logo]()
$318
This Gotogate deal was found by Cheapflights users on 9/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2912:20 pm -
Nonstop1h 46m
Sun 11/110:35 am -
Nonstop2h 05m
Deal found 9/29![Porter Airlines logo]()
$319
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 September 30, 2026.
Search for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
This CheapOair deal was found by Cheapflights users on 9/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:20 pm -
Nonstop1h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Air Transat logo]()
$110
This Trip.com deal was found by Cheapflights users on 9/27. 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 10/299:40 am -
1 stop28h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Multiple Airlines logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/129:30 am -
1 stop28h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2510:20 am -
1 stop28h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:04 am -
1 stop29h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$136
This deal was found by Cheapflights users on 9/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:20 pm -
Nonstop1h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Porter Airlines logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 9/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/28:15 am -
2 stops28h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Multiple Airlines logo]()
$138
This deal was found by Cheapflights users on 9/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/612:20 pm -
Nonstop1h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Porter Airlines logo]()
$140
This Super.com deal was found by Cheapflights users on 9/29. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:45 am -
Nonstop1h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Porter Airlines logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:01 am -
1 stop9h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$141
This Cheapflightsfares deal was found by Cheapflights users on 9/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:20 pm -
Nonstop1h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Porter Airlines logo]()
$142
This Cheapflightsfares deal was found by Cheapflights users on 9/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1012:20 pm -
Nonstop1h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Porter Airlines logo]()
$143
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 September 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $242 |
One-way from | $110 (CheapOair) |
Popular in | August |
Cheapest in | January |
Average price | $301 |
Good round-trip deal | $205 or less |
Good one-way deal | $95 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 September 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 - YTZ Toronto Island
ORDYTZ
Chicago O'Hare Intl
Sun 11/29
6:20 pm-9:06 pm
Nonstop1h 46m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$148
ChicagoToronto
RFD Chicago Greater Rockford - YYZ Toronto Pearson Intl
RFDYYZ
Chicago Greater Rockford
Thu 10/22
9:40 am-8:55 pm
1 stop10h 15m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$148
Quickest round-trip
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Thu 10/22
3:20 pm-6:00 pm
Nonstop1h 40m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$149
ChicagoToronto
RFD Chicago Greater Rockford - YYZ Toronto Pearson Intl
RFDYYZ
Chicago Greater Rockford
Sun 11/8
1:08 pm-6:10 pm
1 stop28h 02m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$154
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Tue 11/10
5:05 pm-10:57 pm
1 stop4h 52m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$177
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Wed 10/14
11:45 am-2:25 pm
Nonstop1h 40m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$184
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Mon 11/16
6:16 am-9:58 pm
3 stops38h 42m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$193
ChicagoToronto
MDW Chicago Midway - YTZ Toronto Island
MDWYTZ
Chicago Midway
Tue 10/13
11:45 am-2:25 pm
Nonstop1h 40m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$194
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Mon 10/26
8:30 pm-11:29 pm
Nonstop1h 59m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$195
ChicagoToronto
ORD Chicago O'Hare Intl - YTZ Toronto Island
ORDYTZ
Chicago O'Hare Intl
Tue 2/23
12:20 pm-3:06 pm
Nonstop1h 46m
Toronto Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$195
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.
RFD-YYZ
MDW-YTZ
ORD-YYZ
ORD-YTZ
ORD-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
RFD-YYZ
MDW-YTZ
ORD-YYZ
ORD-YTZ
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 $288). 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 September 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 32% 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 September 30, 2026.
The most flights from CHI to CAON are scheduled on a Monday (70 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).
How much does it cost to fly round-trip from Chicago to Region of Ontario?
Airfare is typical for this route at the moment.
Chicago to Region of Ontario flights typically cost between $243 and $438 in October.The cheapest round-trip price found within the last 5 days was $250 on Air Canada (Oct 27-Oct 30).
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 September 26, 2026.
Travelers seeking maximum savings on their Chicago to Region of Ontario flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated September 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
7.0
Comfort
8.0
Overall
8.0
Food
7.6
Crew
8.6
Boarding
8.2
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
7.0
Comfort
8.0
Overall
8.0
Food
7.6
Crew
8.6
Boarding
8.2
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
7.0
Comfort
8.0
Overall
8.0
Food
7.6
Crew
8.6
Boarding
8.2
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
7.0
Comfort
8.0
Overall
8.0
Food
7.6
Crew
8.6
Boarding
8.2
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
7.0
Comfort
8.0
Overall
8.0
Food
7.6
Crew
8.6
Boarding
8.2
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
7.0
Comfort
8.0
Overall
8.0
Food
7.6
Crew
8.6
Boarding
8.2
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 September 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 September 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$170 | Average$468 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$193 | Average$351 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$222 | Average$570 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$223 | Average$380 | FlexibilityNo cancel fee | On-time71% |