$106+ Cheap flights from Illinois 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
Aug 30 — Sep 61
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Ontario with Cheapflights
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Cheapest flights from Illinois to OntarioExplore the most affordable flight options available from Illinois to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2026.
Explore the most affordable flight options available from Illinois to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 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 7/27. 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 9/97:25 am
ORD
- YTZ
Nonstop1h 42m
Air Canada
Wed 9/169:30 am
YTZ
- ORD
1 stop6h 22m
Air Canada
Deal found 7/27![Air Canada logo]()
$236
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 9/911:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Wed 9/1610:10 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$237
This Kissandfly.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:40 pm
ORD
- YYZ
Nonstop1h 46m
Air Canada
Sun 9/137:00 am
YYZ
- ORD
Nonstop2h 00m
Air Canada
Deal found 7/26![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 Booking.com deal was found by Cheapflights users on 7/26. 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.
Thu 9/108:45 am
ORD
- YTZ
1 stop6h 05m
Air Canada
Sun 9/137:35 pm
YTZ
- ORD
Nonstop2h 06m
Air Canada
Deal found 7/26![Air Canada logo]()
$238
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
Sun 9/61:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$239
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 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.
Fri 8/282:52 pm
ORD
- YYZ
Nonstop2h 04m
United Airlines
Fri 9/49:00 pm
YYZ
- ORD
Nonstop2h 05m
United Airlines
Deal found 7/30![United Airlines logo]()
$240
This Justfly.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 Justfly.com 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
Mon 9/710:10 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![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 Jettzy 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/138:40 pm
ORD
- YYZ
Nonstop1h 46m
Air Canada
Sun 9/2012:25 pm
YYZ
- ORD
Nonstop1h 58m
Air Canada
Deal found 7/30![Air Canada logo]()
$241
Best flights from Illinois to OntarioDiscover carefully curated flight deals from Illinois to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 31, 2026.
Discover carefully curated flight deals from Illinois to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 31, 2026.
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
Sun 9/61:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$239
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1612:59 pm
ORD
- YYZ
Nonstop1h 47m
United Airlines
Sat 9/198:50 am
YYZ
- ORD
Nonstop2h 03m
United Airlines
Deal found 7/25![United Airlines logo]()
$253
This Flightnetwork deal was found by Cheapflights users on 7/25. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:45 am
ORD
- YTZ
1 stop6h 05m
Air Canada
Thu 9/248:30 am
YTZ
- ORD
1 stop7h 22m
Air Canada
Deal found 7/25![Air Canada logo]()
$257
This United deal was found by Cheapflights users on 7/27. 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.
Sun 9/612:59 pm
ORD
- YYZ
Nonstop1h 47m
Multiple Airlines
Fri 9/114:00 pm
YYZ
- ORD
1 stop5h 12m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$262
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.
Mon 9/145:10 pm
ORD
- YYZ
1 stop4h 49m
Delta
Sat 9/199:45 am
YYZ
- ORD
1 stop7h 29m
Delta
Deal found 7/29![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:27 am
STL
- YYZ
1 stop14h 59m
American Airlines
Sat 10/1711:09 am
YYZ
- STL
1 stop8h 28m
American Airlines
Deal found 7/25![American Airlines logo]()
$420
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 8/2710:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Sun 8/308:50 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$242
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Tue 9/225:53 pm
ORD
- YYZ
Nonstop1h 51m
United Airlines
Sat 9/267:00 am
YYZ
- ORD
Nonstop2h 00m
United Airlines
Deal found 7/27![United Airlines logo]()
$253
This United deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:59 pm
ORD
- YYZ
Nonstop1h 47m
Multiple Airlines
Tue 9/159:00 am
YYZ
- ORD
1 stop6h 52m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$262
This Porter Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/911:45 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Wed 9/1610:10 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/26![Porter Airlines logo]()
$245
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:03 pm
MDW
- YYZ
1 stop4h 56m
Delta
Fri 9/1812:08 pm
YYZ
- MDW
1 stop7h 25m
Delta
Deal found 7/28![Delta logo]()
$279
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.
Tue 9/15:30 pm
ORD
- YHM
1 stop22h 45m
WestJet
Fri 9/46:10 pm
YHM
- ORD
1 stop23h 30m
WestJet
Deal found 7/28![WestJet logo]()
$574
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 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.
Sat 9/267:09 am
ORD
- YYZ
Nonstop1h 45m
United Airlines
Sun 9/277:00 am
YYZ
- ORD
Nonstop2h 00m
United Airlines
Deal found 7/29![United Airlines logo]()
$270
This Air Canada deal was found by Cheapflights users on 7/25. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:25 am
ORD
- YTZ
Nonstop1h 53m
Air Canada
Mon 8/317:35 pm
YTZ
- ORD
Nonstop2h 06m
Air Canada
Deal found 7/25![Air Canada logo]()
$300
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.
Thu 9/31:25 pm
MDW
- YYZ
1 stop8h 38m
Delta
Sun 9/69:45 am
YYZ
- MDW
1 stop8h 14m
Delta
Deal found 7/29![Delta logo]()
$279
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 7/28. 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 7/27. 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 9/229:29 am
MDW
- YYZ
1 stop6h 51m
Delta
Sat 9/269:45 am
YYZ
- MDW
1 stop3h 54m
Delta
Deal found 7/27![Delta logo]()
$279
This Porter Airlines deal was found by Cheapflights users on 7/27. 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:20 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Sun 9/1310:10 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/27![Porter Airlines logo]()
$245
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.
Sat 9/126:22 pm
ORD
- YYZ
1 stop4h 32m
United Airlines
Mon 9/148:00 pm
YYZ
- ORD
1 stop5h 28m
United Airlines
Deal found 7/29![United Airlines logo]()
$300
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 9/59:39 pm
ORD
- YYZ
1 stop11h 25m
Multiple Airlines
Mon 9/711:10 pm
YYZ
- ORD
1 stop12h 05m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:59 am
ORD
- YYZ
1 stop7h 21m
Delta
Sun 9/66:10 am
YYZ
- ORD
1 stop5h 32m
Delta
Deal found 7/27![Delta logo]()
$307
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 8/212:00 pm
ORD
- YUL
1 stop6h 47m
Air Canada
Sun 8/235:00 am
YUL
- ORD
1 stop5h 00m
Air Canada
Deal found 7/30![Air Canada logo]()
$374
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.
Tue 8/186:00 am
ORD
- YYZ
1 stop6h 47m
United Airlines
Sun 8/2310:15 am
YYZ
- ORD
Nonstop2h 06m
United Airlines
Deal found 7/30![United Airlines logo]()
$314
This FlightHub deal was found by Cheapflights users on 7/25. 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 8/1510:20 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Sat 8/228:50 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/25![Porter Airlines logo]()
$272
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/29:24 am
MDW
- YYZ
1 stop7h 00m
Delta
Sat 9/512:09 pm
YYZ
- MDW
1 stop5h 50m
Delta
Deal found 7/28![Delta logo]()
$307
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 8/221:30 pm
ORD
- YYZ
1 stop7h 53m
United Airlines
Sun 8/237:00 am
YYZ
- ORD
Nonstop2h 00m
United Airlines
Deal found 7/27![United Airlines logo]()
$319
This United deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:11 am
ORD
- YUL
Nonstop2h 29m
Multiple Airlines
Mon 8/246:30 pm
YUL
- ORD
Nonstop2h 35m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$366
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:24 am
MDW
- YYZ
1 stop4h 56m
Delta
Tue 9/112:09 pm
YYZ
- MDW
1 stop5h 50m
Delta
Deal found 7/28![Delta logo]()
$307
Last-minute flights from Illinois to OntarioDiscover last-minute flight deals from Illinois to Ontario. Data last updated July 31, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Ontario. Data last updated July 31, 2026 and is based on user searches.
This Kiwi.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 Kiwi.com 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
Sun 8/231:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$248
This FlightHub deal was found by Cheapflights users on 7/26. 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.
Fri 8/2110:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Wed 9/21:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/26![Porter Airlines logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Sat 8/2210:20 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Tue 8/251:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/26![Porter Airlines logo]()
$245
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/233:15 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Wed 8/268:55 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$247
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 7/28. 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.
Tue 8/253:15 pm
MDW
- YTZ
Nonstop1h 40m
Multiple Airlines
Tue 9/11:45 pm
YTZ
- MDW
Nonstop1h 50m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$250
This Super.com deal was found by Cheapflights users on 7/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Sun 8/301:45 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/26![Porter Airlines 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.
Thu 8/272:00 pm
ORD
- YTZ
Nonstop1h 53m
Air Canada
Sun 9/67:45 pm
YTZ
- ORD
Nonstop2h 06m
Air Canada
Deal found 7/30![Air Canada logo]()
$242
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.
Thu 8/2712:59 pm
ORD
- YYZ
Nonstop1h 47m
United Airlines
Sun 9/67:00 am
YYZ
- ORD
Nonstop2h 00m
United Airlines
Deal found 7/30![United Airlines logo]()
$246
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.
Fri 8/282:52 pm
ORD
- YYZ
Nonstop2h 04m
United Airlines
Sun 8/301:00 pm
YYZ
- ORD
Nonstop2h 05m
United Airlines
Deal found 7/30![United Airlines logo]()
$240
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.
Fri 8/288:50 pm
ORD
- YYZ
Nonstop1h 46m
Air Canada
Mon 8/314:00 pm
YYZ
- ORD
1 stop5h 05m
Air Canada
Deal found 7/31![Air Canada logo]()
$249
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Mon 9/710:10 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 7/28![Porter Airlines logo]()
$249
One-way flights from Illinois to OntarioSearch for one-way flight options from Illinois to Ontario. Find affordable one-way fares based on user searches. Data last updated July 31, 2026.
Search for one-way flight options from Illinois to Ontario. Find affordable one-way fares based on user searches. Data last updated July 31, 2026.
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 Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:45 am
ORD
- YTZ
1 stop6h 05m
Air Canada
Deal found 7/30![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 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.
Thu 9/1011:05 am
ORD
- YYZ
1 stop6h 07m
Air Canada
Deal found 7/30![Air Canada logo]()
$108
This Air Canada deal was found by Cheapflights users on 7/26. 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.
Sat 9/2611:05 am
ORD
- YYZ
1 stop5h 28m
Air Canada
Deal found 7/26![Air Canada logo]()
$109
This Porter 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 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 7/30![Porter Airlines 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
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:37 pm
MDW
- YYZ
1 stop4h 22m
Delta
Deal found 7/28![Delta logo]()
$111
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.
Thu 8/2010:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Deal found 7/29![Porter Airlines logo]()
$112
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.
Thu 9/37:25 am
ORD
- YTZ
Nonstop1h 42m
Air Canada
Deal found 7/30![Air Canada logo]()
$112
Find flight deals from Illinois to Ontario
Keep the following information in mind while searching for Illinois to Ontario flight deals. Data was last updated July 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $236 (oojo) |
One-way from | $106 (Air Canada) |
Popular in | August |
Cheapest in | March |
Average price | $303 |
Good round-trip deal | $242 or less |
Good one-way deal | $106 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois 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 July 31, 2026.
Use the filters below to find and compare flights from Illinois to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Thu 9/3
3:20 pm-6:00 pm
Nonstop1h 40m
Toronto Island
Sun 9/6
1:45 pm-2:35 pm
Nonstop1h 50m
$239
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Thu 8/27
10:25 am-1:05 pm
Nonstop1h 40m
Toronto Island
Sun 8/30
8:50 am-9:40 am
Nonstop1h 50m
$242
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Wed 9/9
11:45 am-2:25 pm
Nonstop1h 40m
Toronto Island
Wed 9/16
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
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
MDW - YTZ
MDWYTZ
Chicago Midway
Wed 9/9
3:20 pm-6:00 pm
Nonstop1h 40m
Toronto Island
Sun 9/13
10:10 am-11:00 am
Nonstop1h 50m
$245
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Wed 9/16
12:59 pm-3:46 pm
Nonstop1h 47m
Toronto Pearson Intl
Sat 9/19
8:50 am-9:53 am
Nonstop2h 03m
$253
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Tue 9/22
5:53 pm-8:44 pm
Nonstop1h 51m
Toronto Pearson Intl
Sat 9/26
7:00 am-8:00 am
Nonstop2h 00m
$253
ChicagoToronto
ORD - YTZ
ORDYTZ
Chicago O'Hare Intl
Mon 9/21
8:45 am-3:50 pm
1 stop6h 05m
Toronto Island
Thu 9/24
8:30 am-2:52 pm
1 stop7h 22m
$257
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Sun 9/6
12:59 pm-3:46 pm
Nonstop1h 47m
Toronto Pearson Intl
Fri 9/11
4:00 pm-8:12 pm
1 stop5h 12m
$262
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Illinois with our price prediction graph.
MDW-YTZ
ORD-YYZ
ORD-YTZ
STL-YYZ
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 Illinois to Ontario
USIL-CAON
MDW-YTZ
ORD-YYZ
ORD-YTZ
STL-YYZ
What is the cheapest month to book a flight from Illinois to Region of Ontario?
Currently, February is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of $284). Flying from Illinois 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 IL to ON?
Find hourly flight availability from Illinois 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 July 31, 2026.
It’s optimal to fly from Illinois 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 Illinois to Region of Ontario
Explore weekly flight availability from Illinois 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 July 31, 2026.
The most flights from USIL to CAON are scheduled on a Wednesday (70 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (41 on average).
How much does it cost to fly round-trip from Illinois to Region of Ontario?
Airfare is below average for this route at the moment.
Illinois to Region of Ontario flights typically cost between $319 and $512 in September.The cheapest round-trip price found within the last 5 days was $237 on Air Canada (Sep 10-Sep 13).
How far ahead should I book a flight from Illinois to Region of Ontario?
The price you pay for your flight from Illinois to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 64 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Illinois to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Ontario. Price data was last updated on July 25, 2026.
Travelers seeking maximum savings on their Illinois 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 July 31, 2026.
Read through reviews of airlines operating flights from Illinois to Ontario, such as Porter Airlines,Delta, andUnited Airlines. 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.
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Food
7.5
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Food
7.5
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Food
7.5
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Food
7.5
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Food
7.5
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Food
7.5
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Related info for your journey
Find useful and relevant information for your journey from Illinois to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Illinois 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 Illinois to Ontario by cabin class
Find flights from Illinois to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Ontario flights
Browse other Illinois and Ontario flight options. Last updated on July 31, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Ontario
Find the right flight back to Illinois after your stay in Ontario
Illinois to Ontario flights
Consider these flights traveling from Illinois to Ontario.
Top 7 airlines flying from Illinois to Ontario
Discover the top 7 airlines that operate flights from Illinois 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 July 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$359 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$119 | Average$294 | 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$220 | Average$505 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$223 | Average$383 | FlexibilityNo cancel fee | On-time71% |