$117+ Cheap flights from Ontario to Illinois
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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — ORD
เม.ย. 12 — เม.ย. 191
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Ontario to Illinois 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 Ontario to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to IllinoisExplore the most affordable flight options available from Ontario to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on มีนาคม 13, 2026.
Explore the most affordable flight options available from Ontario to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on มีนาคม 13, 2026.
This Mytrip deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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.
ศ. 5/810:35 am
YUL
- MDW
1 stop5h 00m
Porter Airlines
อา. 5/1010:25 am
MDW
- YUL
1 stop6h 50m
Porter Airlines
Deal found 3/12![Porter Airlines logo]()
$162
This Trip.com deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” 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.
พ. 4/156:50 am
YUL
- MDW
1 stop4h 25m
Porter Airlines
อ. 4/2111:00 am
MDW
- YUL
1 stop4h 30m
Porter Airlines
Deal found 3/8![Porter Airlines logo]()
$185
This FlightHub deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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.
พฤ. 5/286:30 am
YUL
- MDW
1 stop4h 10m
Porter Airlines
อา. 5/3110:25 am
MDW
- YUL
1 stop5h 50m
Porter Airlines
Deal found 3/13![Porter Airlines logo]()
$188
This Trip.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
ศ. 5/110:35 am
YUL
- MDW
1 stop5h 00m
Porter Airlines
จ. 5/43:20 pm
MDW
- YUL
1 stop5h 50m
Porter Airlines
Deal found 3/11![Porter Airlines logo]()
$189
This Trip.com deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
จ. 6/14:30 pm
YUL
- ORD
1 stop4h 46m
Air Canada
อา. 6/77:25 am
ORD
- YUL
1 stop5h 20m
Air Canada
Deal found 3/10![Air Canada logo]()
$190
This Mytrip deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
พฤ. 4/99:15 am
YUL
- ORD
1 stop4h 50m
Air Canada
อา. 4/127:55 am
ORD
- YUL
1 stop4h 26m
Air Canada
Deal found 3/9![Air Canada logo]()
$191
This Trip.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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.
ศ. 6/54:30 pm
YUL
- ORD
1 stop4h 46m
Air Canada
จ. 6/87:25 am
ORD
- YUL
1 stop5h 20m
Air Canada
Deal found 3/12![Air Canada logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
ศ. 6/56:30 am
YUL
- MDW
1 stop4h 10m
Porter Airlines
อา. 6/73:20 pm
MDW
- YUL
1 stop5h 50m
Porter Airlines
Deal found 3/11![Porter Airlines logo]()
$193
This FlightHub deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
พ. 4/156:50 am
YUL
- MDW
1 stop4h 25m
Porter Airlines
ศ. 4/244:05 pm
MDW
- YUL
1 stop5h 40m
Porter Airlines
Deal found 3/10![Porter Airlines logo]()
$194
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
จ. 3/309:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
พ. 4/111:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Deal found 3/9![Porter Airlines logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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.
พ. 5/206:30 am
YUL
- MDW
1 stop4h 10m
Porter Airlines
อ. 5/2610:25 am
MDW
- YUL
1 stop5h 50m
Porter Airlines
Deal found 3/13![Porter Airlines logo]()
$196
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
พฤ. 4/99:25 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
ส. 4/1112:55 pm
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Deal found 3/9![Porter Airlines logo]()
$197
Best flights from Ontario to IllinoisDiscover carefully curated flight deals from Ontario to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated มีนาคม 13, 2026.
Discover carefully curated flight deals from Ontario to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated มีนาคม 13, 2026.
This United Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
อ. 4/145:00 pm
YUL
- ORD
Nonstop2h 52m
United Airlines
อ. 4/217:13 am
ORD
- YUL
Nonstop2h 27m
United Airlines
Deal found 3/9![United Airlines logo]()
$200
This FlightHub deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
พ. 4/19:25 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
อ. 4/711:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Deal found 3/10![Porter Airlines logo]()
$229
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
ส. 4/182:29 pm
YUL
- ORD
1 stop5h 54m
Delta
อ. 4/217:14 am
ORD
- YUL
1 stop5h 25m
Delta
Deal found 3/9![Delta logo]()
$236
This SmartFares deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
อา. 4/59:25 am
YTZ
- MDW
Nonstop1h 50m
Air Transat
อ. 4/711:00 am
MDW
- YTZ
Nonstop1h 42m
Air Transat
Deal found 3/12![Air Transat logo]()
$252
This KAYAK deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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.
จ. 6/17:20 pm
YTZ
- ORD
Nonstop1h 56m
Air Canada
ศ. 6/52:00 pm
ORD
- YTZ
Nonstop1h 41m
Air Canada
Deal found 3/13![Air Canada logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
อ. 4/76:15 pm
YTZ
- ORD
1 stop7h 07m
Multiple Airlines
อ. 4/146:01 pm
ORD
- YTZ
1 stop15h 24m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$288
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
ส. 4/255:00 pm
YUL
- ORD
Nonstop2h 52m
United Airlines
จ. 4/278:45 am
ORD
- YUL
1 stop4h 55m
United Airlines
Deal found 3/11![United Airlines logo]()
$212
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
อ. 3/317:00 am
YUL
- MDW
1 stop6h 02m
Delta
พฤ. 4/26:34 pm
MDW
- YUL
1 stop3h 39m
Delta
Deal found 3/9![Delta logo]()
$236
This Porter Airlines deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” 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.
อ. 4/289:25 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
พ. 4/2911:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Deal found 3/8![Porter Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
อ. 3/316:10 am
YUL
- ORD
Nonstop2h 50m
United Airlines
ส. 4/46:01 pm
ORD
- YUL
Nonstop2h 25m
United Airlines
Deal found 3/10![United Airlines logo]()
$230
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
อ. 3/3112:50 pm
YUL
- MDW
1 stop6h 04m
Delta
ศ. 4/36:34 pm
MDW
- YUL
1 stop3h 39m
Delta
Deal found 3/9![Delta logo]()
$236
This Porter Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
ส. 5/308:50 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
พ. 6/33:20 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Deal found 3/9![Porter Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
ส. 4/185:00 pm
YUL
- ORD
Nonstop2h 52m
United Airlines
อ. 4/211:00 pm
ORD
- YUL
1 stop5h 45m
United Airlines
Deal found 3/11![United Airlines logo]()
$230
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
อ. 3/317:00 am
YUL
- MDW
1 stop6h 02m
Delta
พ. 4/16:34 pm
MDW
- YUL
1 stop3h 39m
Delta
Deal found 3/9![Delta logo]()
$236
This Porter Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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.
จ. 9/710:05 am
YTZ
- ORD
Nonstop1h 55m
Porter Airlines
จ. 9/147:00 am
ORD
- YTZ
Nonstop1h 40m
Porter Airlines
Deal found 3/12![Porter Airlines logo]()
$250
This United Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
อ. 3/319:45 am
YUL
- ORD
Nonstop2h 52m
United Airlines
อ. 3/316:01 pm
ORD
- YUL
1 stop5h 12m
United Airlines
Deal found 3/9![United Airlines logo]()
$231
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
ส. 6/66:00 am
YUL
- MDW
1 stop7h 42m
Delta
ศ. 6/122:00 pm
MDW
- YUL
1 stop8h 34m
Delta
Deal found 3/9![Delta logo]()
$237
This Porter Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
ศ. 4/242:30 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
ศ. 5/13:20 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Deal found 3/10![Porter Airlines logo]()
$252
This United Airlines deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” 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.
พฤ. 4/96:35 pm
YUL
- ORD
1 stop6h 08m
United Airlines
อา. 4/127:13 am
ORD
- YUL
Nonstop2h 27m
United Airlines
Deal found 3/8![United Airlines logo]()
$236
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
ศ. 4/1712:42 pm
YUL
- MDW
1 stop10h 46m
Delta
จ. 4/205:21 pm
MDW
- YUL
1 stop5h 30m
Delta
Deal found 3/9![Delta logo]()
$237
This Flightnetwork deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
ส. 6/207:20 pm
YTZ
- ORD
Nonstop1h 56m
Air Canada
อ. 6/238:45 am
ORD
- YTZ
1 stop6h 06m
Air Canada
Deal found 3/9![Air Canada logo]()
$350
This Trip.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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.
พฤ. 4/239:25 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
จ. 4/2711:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Deal found 3/12![Porter Airlines logo]()
$252
This Flightnetwork deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
ศ. 4/247:25 am
YTZ
- ORD
1 stop13h 32m
Multiple Airlines
ศ. 5/12:09 pm
ORD
- YTZ
1 stop5h 00m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$376
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
ศ. 4/246:35 pm
YUL
- ORD
1 stop16h 03m
United Airlines
อา. 4/268:00 am
ORD
- YUL
1 stop10h 45m
United Airlines
Deal found 3/11![United Airlines logo]()
$236
This oojo deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
พฤ. 6/46:10 pm
YHM
- ORD
1 stop23h 30m
WestJet
อา. 6/75:30 pm
ORD
- YHM
1 stop22h 45m
WestJet
Deal found 3/11![WestJet logo]()
$781
This Delta deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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.
พฤ. 4/166:00 am
YUL
- ORD
1 stop5h 19m
Delta
จ. 4/208:15 am
ORD
- YUL
1 stop8h 25m
Delta
Deal found 3/12![Delta logo]()
$251
This Air Canada deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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.
ศ. 6/197:20 pm
YTZ
- ORD
Nonstop1h 56m
Air Canada
จ. 6/2211:05 am
ORD
- YTZ
1 stop5h 46m
Air Canada
Deal found 3/12![Air Canada logo]()
$370
This United Airlines deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” 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.
พ. 4/1511:23 am
YUL
- ORD
1 stop5h 41m
United Airlines
อ. 4/217:00 am
ORD
- YUL
1 stop5h 09m
United Airlines
Deal found 3/8![United Airlines logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
พฤ. 3/266:15 pm
YTZ
- ORD
1 stop7h 07m
Multiple Airlines
จ. 3/307:31 pm
ORD
- YTZ
1 stop14h 04m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$398
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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.
พ. 4/1512:55 pm
YUL
- MDW
1 stop6h 03m
Delta
ศ. 4/171:24 pm
MDW
- YUL
1 stop8h 55m
Delta
Deal found 3/13![Delta logo]()
$251
Last-minute flights from Ontario to IllinoisDiscover last-minute flight deals from Ontario to Illinois. Data last updated มีนาคม 13, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Illinois. Data last updated มีนาคม 13, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
จ. 3/309:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
พ. 4/111:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Deal found 3/9![Porter Airlines logo]()
$196
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
อ. 4/76:50 am
YUL
- MDW
1 stop4h 25m
Porter Airlines
พฤ. 4/911:00 am
MDW
- YUL
1 stop4h 30m
Porter Airlines
Deal found 3/9![Porter Airlines logo]()
$197
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
พ. 4/89:15 am
YUL
- ORD
Nonstop2h 38m
Air Canada
พ. 4/1512:50 pm
ORD
- YUL
Nonstop2h 15m
Air Canada
Deal found 3/9![Air Canada logo]()
$193
This Mytrip deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
พฤ. 4/99:15 am
YUL
- ORD
1 stop4h 50m
Air Canada
อา. 4/127:55 am
ORD
- YUL
1 stop4h 26m
Air Canada
Deal found 3/9![Air Canada logo]()
$191
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
พฤ. 4/99:25 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
ส. 4/1112:55 pm
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Deal found 3/9![Porter Airlines logo]()
$197
This United Airlines deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
พฤ. 4/96:10 am
YUL
- ORD
Nonstop2h 50m
United Airlines
อา. 4/127:13 am
ORD
- YUL
Nonstop2h 27m
United Airlines
Deal found 3/9![United Airlines logo]()
$200
This Trip.com deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” 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.
พ. 4/156:50 am
YUL
- MDW
1 stop4h 25m
Porter Airlines
อ. 4/2111:00 am
MDW
- YUL
1 stop4h 30m
Porter Airlines
Deal found 3/8![Porter Airlines logo]()
$185
This FlightHub deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
พ. 4/156:50 am
YUL
- MDW
1 stop4h 25m
Porter Airlines
ศ. 4/244:05 pm
MDW
- YUL
1 stop5h 40m
Porter Airlines
Deal found 3/10![Porter Airlines logo]()
$194
This Trip.com deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” 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.
พฤ. 4/169:25 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
จ. 4/2011:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Deal found 3/8![Porter Airlines logo]()
$198
This Trip.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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.
พฤ. 4/166:50 am
YUL
- MDW
1 stop4h 25m
Porter Airlines
จ. 4/2011:00 am
MDW
- YUL
1 stop5h 45m
Porter Airlines
Deal found 3/12![Porter Airlines logo]()
$199
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
ศ. 4/242:30 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
ศ. 5/13:20 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Deal found 3/9![Porter Airlines logo]()
$201
This Trip.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” 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.
อา. 4/2610:55 am
YUL
- MDW
1 stop5h 25m
Porter Airlines
อา. 5/310:25 am
MDW
- YUL
1 stop5h 50m
Porter Airlines
Deal found 3/12![Porter Airlines logo]()
$198
One-way flights from Ontario to IllinoisSearch for one-way flight options from Ontario to Illinois. Find affordable one-way fares based on user searches. Data last updated มีนาคม 13, 2026.
Search for one-way flight options from Ontario to Illinois. Find affordable one-way fares based on user searches. Data last updated มีนาคม 13, 2026.
This SmartFares deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พ. 4/19:15 am
YUL
- ORD
Nonstop2h 38m
Air Canada
Deal found 3/9![Air Canada logo]()
$117
This Mytrip deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
ศ. 4/1711:10 am
YUL
- ORD
1 stop5h 05m
Air Canada
Deal found 3/9![Air Canada logo]()
$119
This Trip.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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.
ศ. 5/16:30 am
YUL
- MDW
1 stop4h 10m
Porter Airlines
Deal found 3/13![Porter Airlines logo]()
$120
This Mytrip deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
ส. 5/169:45 am
YUL
- ORD
2 stops8h 14m
Air Canada
Deal found 3/10![Air Canada logo]()
$121
This Trip.com deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
พ. 4/226:50 am
YUL
- MDW
1 stop4h 25m
Porter Airlines
Deal found 3/10![Porter Airlines logo]()
$123
This Trip.com deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
ส. 4/411:20 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 3/10![Porter Airlines logo]()
$124
This Trip.com deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
พฤ. 4/99:25 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 3/10![Porter Airlines logo]()
$125
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
ศ. 6/122:30 pm
YUL
- ORD
1 stop6h 46m
Air Canada
Deal found 3/9![Air Canada logo]()
$125
This eDestinos deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
อา. 5/3110:35 am
YUL
- MDW
1 stop5h 00m
Porter Airlines
Deal found 3/12![Porter Airlines logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” 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.
ศ. 4/172:30 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 3/11![Porter Airlines logo]()
$126
This SmartFares deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
อา. 4/124:50 pm
YYZ
- ORD
Nonstop2h 00m
Air Canada
Deal found 3/10![Air Canada logo]()
$127
This Mytrip deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” 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.
ศ. 4/242:30 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 3/10![Porter Airlines logo]()
$127
Find flight deals from Ontario to Illinois
Keep the following information in mind while searching for Ontario to Illinois flight deals. Data was last updated มีนาคม 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $162 (Mytrip) |
One-way from | $117 (SmartFares) |
Popular in | December |
Cheapest in | July |
Average price | $264 |
Good round-trip deal | $199 or less |
Good one-way deal | $112 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Illinois 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 มีนาคม 13, 2026.
Use the filters below to find and compare flights from Ontario to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
อ. 4/14
5:00 pm-6:52 pm
Nonstop2h 52m
Chicago O'Hare Intl
อ. 4/21
7:13 am-10:40 am
Nonstop2h 27m
$200
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
ส. 4/25
5:00 pm-6:52 pm
Nonstop2h 52m
Chicago O'Hare Intl
จ. 4/27
8:45 am-2:40 pm
1 stop4h 55m
$212
TorontoChicago
YTZ - MDW
YTZMDW
Toronto Island
พ. 4/1
9:25 am-10:15 am
Nonstop1h 50m
Chicago Midway
อ. 4/7
11:00 am-1:42 pm
Nonstop1h 42m
$229
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
อ. 3/31
6:10 am-8:00 am
Nonstop2h 50m
Chicago O'Hare Intl
ส. 4/4
6:01 pm-9:26 pm
Nonstop2h 25m
$230
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
ส. 4/18
5:00 pm-6:52 pm
Nonstop2h 52m
Chicago O'Hare Intl
อ. 4/21
1:00 pm-7:45 pm
1 stop5h 45m
$230
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
อ. 3/31
9:45 am-11:37 am
Nonstop2h 52m
Chicago O'Hare Intl
อ. 3/31
6:01 pm-12:13 am
1 stop5h 12m
$231
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
ส. 4/18
2:29 pm-7:23 pm
1 stop5h 54m
Chicago O'Hare Intl
อ. 4/21
7:14 am-1:39 pm
1 stop5h 25m
$236
MontrealChicago
YUL - MDW
YULMDW
Montreal Pierre Elliott Trudeau Intl
อ. 3/31
7:00 am-12:02 pm
1 stop6h 02m
Chicago Midway
พฤ. 4/2
6:34 pm-11:13 pm
1 stop3h 39m
$236
MontrealChicago
YUL - MDW
YULMDW
Montreal Pierre Elliott Trudeau Intl
อ. 3/31
12:50 pm-5:54 pm
1 stop6h 04m
Chicago Midway
ศ. 4/3
6:34 pm-11:13 pm
1 stop3h 39m
$236
MontrealChicago
YUL - MDW
YULMDW
Montreal Pierre Elliott Trudeau Intl
อ. 3/31
7:00 am-12:02 pm
1 stop6h 02m
Chicago Midway
พ. 4/1
6:34 pm-11:13 pm
1 stop3h 39m
$236
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Ontario with our price prediction graph.
YUL-ORD
YTZ-MDW
YUL-MDW
YYZ-STL
YTZ-ORD
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 Ontario to Illinois
CAON-USIL
YUL-ORD
YTZ-MDW
YUL-MDW
YYZ-STL
What is the cheapest month to book a flight from Region of Ontario to Illinois?
Currently, June is the cheapest month in which you can book a flight from Region of Ontario to Illinois (average of $83). Flying from Region of Ontario to Illinois in February is currently the most expensive (average of $177). 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 ON to IL?
Find hourly flight availability from Ontario to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated มีนาคม 13, 2026.
One of the essential ways to save on airfare from Region of Ontario to Illinois is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 18% on airfare.
What is the cheapest day to fly from Region of Ontario to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Ontario to Illinois. Price data was last updated on March 12, 2026.
Travelers seeking maximum savings on their Region of Ontario to Illinois flight should consider departing on Tuesday at noon when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Region of Ontario to Illinois
Explore weekly flight availability from Ontario to Illinois. 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 มีนาคม 13, 2026.
The most flights from CAON to USIL are scheduled on a Wednesday (63 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (44 on average).
How much does it cost to fly round-trip from Region of Ontario to Illinois?
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated มีนาคม 13, 2026.
See what other customers who have flown with Porter Airlines,Air Transat, andUnited Airlines from Ontario to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
7.0
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
7.0
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
7.0
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
7.0
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
7.0
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
7.0
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Related info for your journey
Find useful and relevant information for your journey from Ontario to Illinois. 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
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Return Flight Options
Top destinations
Alternative routes for Ontario to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Illinois by cabin class
Find flights from Ontario to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Illinois flights
Browse other Ontario and Illinois flight options. Last updated on มีนาคม 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Illinois
Find the right flight back to Ontario after your stay in Illinois
Ontario to Illinois flights
Consider these flights traveling from Ontario to Illinois.
Top 4 airlines flying from Ontario to Illinois
Discover the top 4 airlines that operate flights from Ontario to Illinois. 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 มีนาคม 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$80 | Average$356 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$146 | Average$265 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$165 | Average$426 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$335 | FlexibilityNo cancel fee | On-time71% |