$106+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
Sep 1 — Sep 81
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
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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 2, 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 2, 2026.
This oojo deal was found by Cheapflights users on 7/28. 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.
Wed 9/211:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Sat 9/51:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$236
This Mytrip deal was found by Cheapflights users on 7/28. 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.
Thu 9/105:35 pm
ORD
- YYZ
Nonstop1h 43m
Air Canada
Sun 9/1312:25 pm
YYZ
- ORD
Nonstop1h 58m
Air Canada
Deal found 7/28![Air Canada logo]()
$237
This Super.com deal was found by Cheapflights users on 7/28. 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.
Thu 9/33:20 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Tue 9/81:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$238
This United deal was found by Cheapflights users on 7/28. 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.
Tue 9/2210:47 am
ORD
- YYZ
Nonstop1h 55m
Multiple Airlines
Tue 9/224:00 pm
YYZ
- ORD
1 stop5h 12m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$238
This Flightnetwork deal was found by Cheapflights users on 7/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1111:05 am
ORD
- YYZ
1 stop6h 07m
Air Canada
Fri 9/187:10 am
YYZ
- ORD
2 stops8h 42m
Air Canada
Deal found 7/28![Air Canada logo]()
$239
This Air Canada deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/98:45 am
ORD
- YTZ
1 stop6h 05m
Air Canada
Fri 9/1112:15 pm
YTZ
- ORD
Nonstop2h 06m
Air Canada
Deal found 7/31![Air Canada logo]()
$240
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/238:50 am
ORD
- YYZ
Nonstop1h 59m
United Airlines
Tue 9/17:00 am
YYZ
- ORD
Nonstop2h 00m
United Airlines
Deal found 7/31![United Airlines logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 10/511:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Sat 10/101:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 8/1![Porter Airlines logo]()
$241
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:00 pm
ORD
- YTZ
Nonstop1h 53m
Air Canada
Sat 8/2910:45 am
YTZ
- ORD
1 stop5h 10m
Air Canada
Deal found 7/30![Air Canada logo]()
$241
This United deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 9/84:38 pm
ORD
- YYZ
Nonstop2h 02m
Multiple Airlines
Sat 9/124:00 pm
YYZ
- ORD
Nonstop1h 58m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$241
This Super.com deal was found by Cheapflights users on 7/29. 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.
Mon 8/2410:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Fri 8/288:55 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/29![Porter Airlines logo]()
$242
This Air Canada deal was found by Cheapflights users on 7/30. 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.
Fri 8/282:00 pm
ORD
- YTZ
Nonstop1h 53m
Air Canada
Mon 8/3112:15 pm
YTZ
- ORD
Nonstop2h 06m
Air Canada
Deal found 7/30![Air Canada logo]()
$242
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 2, 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 2, 2026.
This United deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 10/245:53 pm
ORD
- YYZ
Nonstop1h 51m
Multiple Airlines
Tue 10/274:30 pm
YYZ
- ORD
Nonstop2h 13m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$241
This United Airlines deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:59 pm
ORD
- YYZ
Nonstop1h 47m
United Airlines
Sun 10/256:45 am
YYZ
- ORD
Nonstop2h 09m
United Airlines
Deal found 8/1![United Airlines logo]()
$241
This Porter Airlines deal was found by Cheapflights users on 7/29. 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.
Sat 9/1211:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Sat 9/1910:10 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/29![Porter Airlines logo]()
$245
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/248:48 am
ORD
- YYZ
1 stop7h 36m
Delta
Thu 8/272:24 pm
YYZ
- ORD
1 stop7h 06m
Delta
Deal found 7/31![Delta logo]()
$266
This United Airlines deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:53 pm
ORD
- YYZ
Nonstop1h 51m
United Airlines
Tue 9/227:00 am
YYZ
- ORD
Nonstop2h 00m
United Airlines
Deal found 8/1![United Airlines logo]()
$241
This Porter Airlines deal was found by Cheapflights users on 7/29. 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.
Sat 9/1211:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Tue 9/151:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/29![Porter Airlines logo]()
$245
This United deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/912:59 pm
ORD
- YYZ
Nonstop1h 47m
Multiple Airlines
Fri 9/114:00 pm
YYZ
- ORD
1 stop5h 12m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$249
This United Airlines deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 10/144:33 pm
ORD
- YYZ
Nonstop2h 04m
United Airlines
Sun 10/1811:00 am
YYZ
- ORD
Nonstop2h 00m
United Airlines
Deal found 8/1![United Airlines logo]()
$241
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/99:29 am
MDW
- YYZ
1 stop6h 50m
Delta
Mon 10/126:00 am
YYZ
- MDW
1 stop7h 47m
Delta
Deal found 7/31![Delta logo]()
$266
This deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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.
Thu 8/207:25 am
ORD
- YOW
1 stop8h 07m
Air Canada
Wed 8/267:00 am
YOW
- ORD
1 stop7h 22m
Air Canada
Deal found 7/31![Air Canada logo]()
$555
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2210:20 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Tue 8/251:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/30![Porter Airlines logo]()
$261
This United Airlines deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” 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 9/172:52 pm
ORD
- YYZ
Nonstop2h 04m
United Airlines
Thu 9/179:00 pm
YYZ
- ORD
Nonstop2h 05m
United Airlines
Deal found 8/2![United Airlines logo]()
$241
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/119:29 am
MDW
- YYZ
1 stop6h 51m
Delta
Fri 9/1812:08 pm
YYZ
- MDW
1 stop7h 25m
Delta
Deal found 7/31![Delta logo]()
$266
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/31:25 pm
MDW
- YYZ
1 stop8h 38m
Delta
Tue 9/812:08 pm
YYZ
- MDW
1 stop5h 49m
Delta
Deal found 7/31![Delta logo]()
$266
This United deal was found by Cheapflights users on 7/29. 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 9/1212:55 pm
ORD
- YYZ
1 stop5h 07m
Multiple Airlines
Thu 9/1710:30 am
YYZ
- ORD
1 stop5h 22m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$293
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Fri 9/1111:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Fri 9/181:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$270
This Delta deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 9/89:29 am
MDW
- YYZ
1 stop6h 51m
Delta
Wed 9/166:00 am
YYZ
- MDW
1 stop7h 39m
Delta
Deal found 8/1![Delta logo]()
$266
This FlightHub deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 9/105:30 pm
ORD
- YHM
1 stop22h 45m
WestJet
Sun 9/136:10 pm
YHM
- ORD
1 stop23h 30m
WestJet
Deal found 8/1![WestJet logo]()
$716
This FlightHub deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/203:15 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Thu 9/1010:10 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/31![Porter Airlines logo]()
$271
This United deal was found by Cheapflights users on 7/28. 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 8/308:45 am
ORD
- YYZ
1 stop4h 34m
Multiple Airlines
Wed 9/23:00 pm
YYZ
- ORD
1 stop6h 05m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$300
This Delta deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 10/246:44 pm
MDW
- YYZ
1 stop3h 12m
Delta
Tue 10/276:00 am
YYZ
- MDW
1 stop7h 47m
Delta
Deal found 8/1![Delta logo]()
$266
This Trip.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1510:20 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Tue 8/188:55 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 8/1![Porter Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 10/106:44 pm
MDW
- YYZ
1 stop3h 12m
Delta
Mon 10/126:00 am
YYZ
- MDW
1 stop7h 47m
Delta
Deal found 8/1![Delta logo]()
$266
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/2512:56 pm
ORD
- YTZ
1 stop5h 00m
United Airlines
Sun 8/307:35 pm
YTZ
- ORD
Nonstop2h 06m
United Airlines
Deal found 7/31![United Airlines logo]()
$327
This FlightHub deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/193:15 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Mon 8/248:55 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/31![Porter Airlines logo]()
$284
This United deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/58:45 am
ORD
- YTZ
1 stop9h 26m
Multiple Airlines
Wed 9/98:20 am
YTZ
- ORD
1 stop4h 40m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$344
This Delta deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 8/246:42 pm
MDW
- YYZ
1 stop3h 21m
Delta
Fri 8/2812:09 pm
YYZ
- MDW
1 stop7h 24m
Delta
Deal found 8/1![Delta logo]()
$266
This United Airlines deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:50 am
ORD
- YTZ
1 stop7h 21m
United Airlines
Tue 9/87:35 pm
YTZ
- ORD
Nonstop2h 06m
United Airlines
Deal found 8/1![United Airlines logo]()
$328
This Flightnetwork deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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.
Tue 9/811:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Thu 10/81:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 8/1![Porter Airlines logo]()
$288
This United deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 11/158:50 am
ORD
- YTZ
1 stop8h 55m
Multiple Airlines
Thu 11/198:20 am
YTZ
- ORD
2 stops7h 32m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$352
Last-minute flights from Chicago to OntarioDiscover last-minute flight deals from Chicago to Ontario. Data last updated August 2, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Ontario. Data last updated August 2, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/193:15 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Thu 8/278:55 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/30![Porter Airlines logo]()
$244
This FlightHub deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/1910:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Wed 9/910:10 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/31![Porter Airlines logo]()
$245
This Air Canada deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 8/228:50 pm
ORD
- YYZ
Nonstop1h 46m
Air Canada
Sun 9/612:25 pm
YYZ
- ORD
Nonstop1h 57m
Air Canada
Deal found 8/1![Air Canada logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” 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 8/2210:20 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Sun 8/301:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 8/2![Porter Airlines logo]()
$246
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/238:50 am
ORD
- YYZ
Nonstop1h 59m
United Airlines
Sun 8/309:00 pm
YYZ
- ORD
Nonstop2h 05m
United Airlines
Deal found 7/31![United Airlines logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” 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 8/2310:20 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Thu 9/31:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 8/2![Porter Airlines logo]()
$243
This Super.com deal was found by Cheapflights users on 7/29. 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.
Mon 8/2410:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Fri 8/288:55 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/29![Porter Airlines logo]()
$242
This Air Canada deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:40 am
ORD
- YTZ
1 stop6h 11m
Air Canada
Mon 8/317:35 pm
YTZ
- ORD
Nonstop2h 06m
Air Canada
Deal found 7/31![Air Canada logo]()
$240
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:00 pm
ORD
- YTZ
Nonstop1h 53m
Air Canada
Sat 8/2910:45 am
YTZ
- ORD
1 stop5h 10m
Air Canada
Deal found 7/30![Air Canada logo]()
$241
This Trip.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/272:00 pm
ORD
- YTZ
Nonstop1h 53m
Air Canada
Sun 8/306:50 am
YTZ
- ORD
1 stop5h 31m
Air Canada
Deal found 7/31![Air Canada logo]()
$245
This Air Canada deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/277:25 am
ORD
- YTZ
Nonstop1h 53m
Air Canada
Thu 8/2712:30 pm
YTZ
- ORD
1 stop8h 35m
Air Canada
Deal found 7/31![Air Canada logo]()
$246
This Air Canada deal was found by Cheapflights users on 7/30. 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.
Fri 8/282:00 pm
ORD
- YTZ
Nonstop1h 53m
Air Canada
Mon 8/3112:15 pm
YTZ
- ORD
Nonstop2h 06m
Air Canada
Deal found 7/30![Air Canada logo]()
$242
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 2, 2026.
Search for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Data last updated August 2, 2026.
This Porter Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/213:20 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Deal found 7/31![Porter Airlines logo]()
$106
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/22:00 pm
ORD
- YTZ
Nonstop1h 42m
Air Canada
Deal found 7/29![Air Canada logo]()
$106
This United Airlines deal was found by Cheapflights users on 7/29. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/114:35 pm
ORD
- YYZ
Nonstop2h 02m
United Airlines
Deal found 7/29![United Airlines logo]()
$106
This Air Canada deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 9/207:25 am
ORD
- YTZ
Nonstop1h 42m
Air Canada
Deal found 8/1![Air Canada logo]()
$107
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:30 pm
ORD
- YYZ
Nonstop1h 56m
American Airlines
Deal found 7/30![American Airlines logo]()
$107
This Booking.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/1311:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Deal found 7/31![Porter Airlines logo]()
$108
This Air Canada deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/208:40 pm
ORD
- YYZ
Nonstop1h 46m
Air Canada
Deal found 7/31![Air Canada logo]()
$108
This Porter Airlines deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2011:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Deal found 8/1![Porter Airlines logo]()
$109
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/272:51 pm
ORD
- YYZ
Nonstop1h 53m
American Airlines
Deal found 7/30![American Airlines logo]()
$109
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/272:00 pm
ORD
- YTZ
Nonstop1h 42m
Air Canada
Deal found 7/29![Air Canada logo]()
$110
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Sun 9/136:00 am
ORD
- YYZ
1 stop12h 02m
United Airlines
Deal found 7/30![United Airlines logo]()
$110
This Delta deal was found by Cheapflights users on 7/29. 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.
Sun 9/208:55 am
ORD
- YYZ
1 stop7h 25m
Delta
Deal found 7/29![Delta logo]()
$111
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 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $236 (oojo) |
One-way from | $106 (Porter Airlines) |
Popular in | August |
Cheapest in | March |
Average price | $311 |
Good round-trip deal | $238 or less |
Good one-way deal | $110 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 2,558,603 searches. Data last updated August 2, 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 - YYZ
ORDYYZ
Chicago O'Hare Intl
Sat 10/24
5:53 pm-8:44 pm
Nonstop1h 51m
Toronto Pearson Intl
Tue 10/27
4:30 pm-5:43 pm
Nonstop2h 13m
$241
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Mon 10/19
12:59 pm-3:46 pm
Nonstop1h 47m
Toronto Pearson Intl
Sun 10/25
6:45 am-7:54 am
Nonstop2h 09m
$241
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Sat 9/19
5:53 pm-8:44 pm
Nonstop1h 51m
Toronto Pearson Intl
Tue 9/22
7:00 am-8:00 am
Nonstop2h 00m
$241
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Wed 10/14
4:33 pm-7:37 pm
Nonstop2h 04m
Toronto Pearson Intl
Sun 10/18
11:00 am-12:00 pm
Nonstop2h 00m
$241
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Thu 9/17
2:52 pm-5:56 pm
Nonstop2h 04m
Toronto Pearson Intl
Thu 9/17
9:00 pm-10:05 pm
Nonstop2h 05m
$241
Quickest round-trip
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Sat 9/12
11:45 am-2:25 pm
Nonstop1h 40m
Toronto Island
Sat 9/19
10:10 am-11:00 am
Nonstop1h 50m
$245
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Sat 9/12
11:45 am-2:25 pm
Nonstop1h 40m
Toronto Island
Tue 9/15
1:45 pm-2:35 pm
Nonstop1h 50m
$245
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Wed 9/9
12:59 pm-3:46 pm
Nonstop1h 47m
Toronto Pearson Intl
Fri 9/11
4:00 pm-8:12 pm
1 stop5h 12m
$249
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Sat 8/22
10:20 am-1:00 pm
Nonstop1h 40m
Toronto Island
Tue 8/25
1:45 pm-2:35 pm
Nonstop1h 50m
$261
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Mon 8/24
8:48 am-5:24 pm
1 stop7h 36m
Toronto Pearson Intl
Thu 8/27
2:24 pm-8:30 pm
1 stop7h 06m
$266
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.
MDW-YTZ
ORD-YYZ
ORD-YTZ
ORD-YOW
MDW-YYZ
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Chicago to Ontario
CHI-CAON
MDW-YTZ
ORD-YYZ
ORD-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 $284). Flying from Chicago to Region of Ontario in August is currently the most expensive (average of $356). 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 2, 2026.
It’s optimal to fly from Chicago to Region of Ontario in the morning. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight at noon.
Weekly flight availability from 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 2, 2026.
The most flights from CHI to CAON are scheduled on a Friday (68 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (38 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 $319 and $468 in September.The cheapest round-trip price found within the last 5 days was $238 on Multiple Airlines (Sep 22-Sep 22).
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 July 25, 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. Tuesday 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 2, 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
Overall
8.0
Food
7.5
Crew
8.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Overall
8.0
Food
7.5
Crew
8.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Overall
8.0
Food
7.5
Crew
8.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Overall
8.0
Food
7.5
Crew
8.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Overall
8.0
Food
7.5
Crew
8.6
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Entertainment
6.9
Overall
8.0
Food
7.5
Crew
8.6
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 August 2, 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 7 airlines flying from Chicago to Ontario
Discover the top 7 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 2,558,603 searches. Data last updated August 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$359 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$119 | Average$290 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$160 | Average$403 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$170 | Average$319 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$174 | Average$348 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$221 | Average$505 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$223 | Average$383 | FlexibilityNo cancel fee | On-time71% |