$71+ 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 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
Mar 7 — Mar 141
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Chicago to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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 Chicago to Ontario
Cheapest
Best
Last-minute
One-way
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 February 5, 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 February 5, 2026.
This Trip.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 2/2611:05 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Sun 3/12:30 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/4![Porter Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Tue 2/2411:05 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Mon 3/29:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Wed 3/1811:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Wed 3/259:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$185
This Flightnetwork deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 6/27:25 am
ORD
- YTZ
Nonstop1h 41m
Air Canada
Sun 6/77:20 pm
YTZ
- ORD
Nonstop1h 56m
Air Canada
Deal found 2/4![Air Canada logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 5/2410:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Thu 5/284:00 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/3![Porter Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/265:35 pm
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Thu 5/284:00 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/3![Porter Airlines logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/1211:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Thu 3/199:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/1412:45 pm
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Thu 3/192:30 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$195
This Flightnetwork deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 6/23:45 pm
ORD
- YYZ
Nonstop1h 43m
Air Canada
Sun 6/76:25 pm
YYZ
- ORD
Nonstop2h 00m
Air Canada
Deal found 2/4![Air Canada logo]()
$195
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:00 am
MDW
- YUL
1 stop5h 45m
Porter Airlines
Mon 4/276:45 am
YUL
- MDW
1 stop4h 20m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$196
This Mytrip deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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.
Fri 4/34:15 pm
MDW
- YUL
1 stop5h 30m
Porter Airlines
Mon 4/66:45 am
YUL
- MDW
1 stop4h 20m
Porter Airlines
Deal found 2/3![Porter Airlines logo]()
$197
This Mytrip deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 2/268:00 am
ORD
- YYZ
Nonstop1h 40m
Air Canada
Sun 3/16:45 pm
YYZ
- ORD
Nonstop1h 58m
Air Canada
Deal found 2/4![Air Canada logo]()
$197
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 February 5, 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 February 5, 2026.
This Trip.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 2/2611:05 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Sun 3/12:30 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/4![Porter Airlines logo]()
$182
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 4/17:13 am
ORD
- YUL
Nonstop2h 27m
United Airlines
Wed 4/14:55 pm
YUL
- ORD
Nonstop2h 52m
United Airlines
Deal found 2/4![United Airlines logo]()
$204
This Air Canada deal was found by Cheapflights users on 2/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/187:15 am
ORD
- YUL
Nonstop2h 05m
Air Canada
Sun 3/229:25 am
YUL
- ORD
Nonstop2h 45m
Air Canada
Deal found 2/2![Air Canada logo]()
$204
This Mytrip deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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.
Fri 4/174:15 pm
MDW
- YTZ
Nonstop1h 42m
Multiple Airlines
Mon 4/202:30 pm
YTZ
- MDW
Nonstop1h 50m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$207
This Delta deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/282:05 pm
MDW
- YUL
1 stop8h 35m
Delta
Sun 4/56:00 am
YUL
- MDW
1 stop7h 29m
Delta
Deal found 2/4![Delta logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/194:15 pm
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Wed 3/259:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/4![Porter Airlines logo]()
$183
This oojo deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:30 pm
ORD
- YHM
1 stop22h 45m
WestJet
Sun 5/36:10 pm
YHM
- ORD
1 stop23h 30m
WestJet
Deal found 2/3![WestJet logo]()
$377
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/317:13 am
ORD
- YUL
Nonstop2h 27m
United Airlines
Sun 4/56:10 am
YUL
- ORD
Nonstop2h 50m
United Airlines
Deal found 2/4![United Airlines logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Fri 3/1311:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Thu 3/192:30 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$194
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2812:50 pm
MDW
- YTZ
Nonstop1h 42m
Multiple Airlines
Mon 3/29:15 am
YTZ
- MDW
Nonstop1h 50m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$215
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/286:00 pm
ORD
- YUL
Nonstop2h 17m
United Airlines
Wed 4/19:45 am
YUL
- ORD
Nonstop2h 52m
United Airlines
Deal found 2/4![United Airlines logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/1211:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Thu 3/199:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$194
This Delta deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/306:34 pm
MDW
- YUL
1 stop3h 39m
Delta
Sun 4/56:00 am
YUL
- MDW
1 stop7h 29m
Delta
Deal found 2/4![Delta logo]()
$238
This United Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 4/106:01 pm
ORD
- YUL
1 stop5h 12m
United Airlines
Mon 4/134:55 pm
YUL
- ORD
Nonstop2h 52m
United Airlines
Deal found 2/3![United Airlines logo]()
$214
This Delta deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/302:05 pm
MDW
- YUL
1 stop8h 35m
Delta
Sat 4/46:00 am
YUL
- MDW
1 stop7h 29m
Delta
Deal found 2/4![Delta logo]()
$238
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2711:05 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Mon 3/29:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$197
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 4/24:20 pm
ORD
- YUL
1 stop6h 53m
United Airlines
Mon 4/64:55 pm
YUL
- ORD
Nonstop2h 52m
United Airlines
Deal found 2/4![United Airlines logo]()
$214
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2710:49 am
MDW
- YUL
1 stop5h 04m
Delta
Sat 3/76:00 am
YUL
- MDW
1 stop7h 46m
Delta
Deal found 2/2![Delta logo]()
$238
This Kissandfly.com deal was found by Cheapflights users on 2/2. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1011:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Wed 4/159:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$202
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/302:30 pm
ORD
- YUL
1 stop6h 36m
United Airlines
Thu 4/26:10 am
YUL
- ORD
Nonstop2h 50m
United Airlines
Deal found 2/4![United Airlines logo]()
$214
This Delta deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 4/46:34 pm
MDW
- YUL
1 stop3h 39m
Delta
Mon 4/66:00 am
YUL
- MDW
1 stop7h 29m
Delta
Deal found 2/3![Delta logo]()
$238
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/210:25 am
MDW
- YTZ
Nonstop1h 40m
Porter Airlines
Mon 5/48:50 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 2/236:51 pm
ORD
- YTZ
1 stop14h 44m
Multiple Airlines
Wed 2/257:40 pm
YTZ
- ORD
1 stop6h 00m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$311
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/294:20 pm
ORD
- YUL
1 stop6h 53m
United Airlines
Thu 4/26:10 am
YUL
- ORD
Nonstop2h 50m
United Airlines
Deal found 2/4![United Airlines logo]()
$214
This Delta deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:00 am
MDW
- YUL
1 stop9h 53m
Delta
Tue 3/37:00 am
YUL
- MDW
1 stop5h 59m
Delta
Deal found 2/3![Delta logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Thu 3/1911:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Mon 3/239:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/1![Porter Airlines logo]()
$212
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/143:46 pm
ORD
- YUL
1 stop4h 56m
United Airlines
Sat 3/216:00 am
YUL
- ORD
Nonstop3h 00m
United Airlines
Deal found 2/4![United Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Tue 3/36:51 pm
ORD
- YTZ
1 stop14h 44m
Multiple Airlines
Wed 3/46:15 pm
YTZ
- ORD
1 stop7h 25m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 4/26:00 am
MDW
- YUL
1 stop10h 31m
Delta
Mon 4/66:00 am
YUL
- MDW
1 stop7h 29m
Delta
Deal found 2/3![Delta logo]()
$238
This Porter Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 4/84:15 pm
MDW
- YUL
1 stop5h 30m
Porter Airlines
Sun 4/1211:25 am
YUL
- MDW
1 stop4h 55m
Porter Airlines
Deal found 2/3![Porter Airlines logo]()
$214
Last-minute flights from Chicago to OntarioDiscover last-minute flight deals from Chicago to Ontario. Data last updated February 5, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Ontario. Data last updated February 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Tue 2/2411:05 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Mon 3/29:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$183
This Trip.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 2/2611:05 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Sun 3/12:30 pm
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/4![Porter Airlines logo]()
$182
This Mytrip deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 2/268:00 am
ORD
- YYZ
Nonstop1h 40m
Air Canada
Sun 3/16:45 pm
YYZ
- ORD
Nonstop1h 58m
Air Canada
Deal found 2/4![Air Canada logo]()
$197
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2711:05 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Mon 3/29:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$197
This Trip.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 2/2812:50 pm
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Mon 3/29:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/3![Porter Airlines logo]()
$189
This Booking.com deal was found by Cheapflights users on 2/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/41:55 pm
ORD
- YYZ
Nonstop1h 39m
Air Canada
Wed 3/112:15 pm
YYZ
- ORD
Nonstop1h 55m
Air Canada
Deal found 2/2![Air Canada logo]()
$204
This Mytrip deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 3/118:00 am
ORD
- YYZ
Nonstop1h 40m
Air Canada
Sun 3/1512:05 pm
YYZ
- ORD
Nonstop1h 56m
Air Canada
Deal found 2/3![Air Canada logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/1211:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Thu 3/199:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/1412:45 pm
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Tue 3/179:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Wed 3/1811:00 am
MDW
- YTZ
Nonstop1h 42m
Porter Airlines
Wed 3/259:15 am
YTZ
- MDW
Nonstop1h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$185
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/184:47 pm
ORD
- YYZ
Nonstop1h 58m
United Airlines
Sun 3/226:45 am
YYZ
- ORD
Nonstop2h 15m
United Airlines
Deal found 2/4![United Airlines logo]()
$235
This SmartFares deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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.
Wed 3/251:55 pm
ORD
- YYZ
Nonstop1h 39m
Air Canada
Fri 3/278:15 am
YYZ
- ORD
Nonstop1h 58m
Air Canada
Deal found 2/4![Air Canada logo]()
$205
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 February 5, 2026.
Search for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Data last updated February 5, 2026.
This Trip.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 3/1211:00 am
MDW
- YUL
1 stop5h 45m
Porter Airlines
Deal found 2/4![Porter Airlines logo]()
$71
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2610:25 am
MDW
- YUL
1 stop5h 50m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$72
This United Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 4/12:00 pm
ORD
- YUL
Nonstop2h 30m
United Airlines
Deal found 2/4![United Airlines logo]()
$75
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/2711:00 am
MDW
- YUL
1 stop5h 45m
Porter Airlines
Deal found 2/2![Porter Airlines logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:36 pm
ORD
- YYZ
1 stop27h 44m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Wed 4/16:10 pm
ORD
- YYZ
1 stop24h 45m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$87
This Delta deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” 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 2/2510:49 am
MDW
- YUL
1 stop5h 04m
Delta
Deal found 2/4![Delta logo]()
$89
This Delta deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/56:30 am
ORD
- YUL
1 stop8h 25m
Delta
Deal found 2/3![Delta logo]()
$89
This United Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 2/276:28 pm
ORD
- YYZ
Nonstop1h 53m
United Airlines
Deal found 2/3![United Airlines logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Tue 4/281:27 pm
ORD
- YYZ
1 stop23h 38m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 3/129:15 am
ORD
- YYZ
1 stop9h 40m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$97
This Delta deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 3/308:55 am
ORD
- YYZ
1 stop6h 04m
Delta
Deal found 2/3![Delta logo]()
$101
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 February 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $182 (Trip.com) |
One-way from | $71 (Trip.com) |
Popular in | January |
Cheapest in | September |
Average price | $276 |
Good round-trip deal | $215 or less |
Good one-way deal | $140 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 February 5, 2026.
Use the filters below to find and compare flights from Chicago to Ontario that are best for you.
Fly from
Chicago
Fly to
Ontario
Route
Depart
Return
Price
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Thu 2/26
11:05 am-1:47 pm
Nonstop1h 42m
Toronto Island
Sun 3/1
2:30 pm-3:20 pm
Nonstop1h 50m
$182
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Thu 3/19
4:15 pm-6:57 pm
Nonstop1h 42m
Toronto Island
Wed 3/25
9:15 am-10:05 am
Nonstop1h 50m
$183
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Fri 3/13
11:00 am-1:42 pm
Nonstop1h 42m
Toronto Island
Thu 3/19
2:30 pm-3:20 pm
Nonstop1h 50m
$194
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Thu 3/12
11:00 am-1:42 pm
Nonstop1h 42m
Toronto Island
Thu 3/19
9:15 am-10:05 am
Nonstop1h 50m
$194
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Fri 2/27
11:05 am-1:47 pm
Nonstop1h 42m
Toronto Island
Mon 3/2
9:15 am-10:05 am
Nonstop1h 50m
$197
ChicagoToronto
MDW - YTZ
MDWYTZ
Chicago Midway
Fri 4/10
11:00 am-1:42 pm
Nonstop1h 42m
Toronto Island
Wed 4/15
9:15 am-10:05 am
Nonstop1h 50m
$202
ChicagoMontreal
ORD - YUL
ORDYUL
Chicago O'Hare Intl
Wed 4/1
7:13 am-10:40 am
Nonstop2h 27m
Montreal Pierre Elliott Trudeau Intl
Wed 4/1
4:55 pm-6:47 pm
Nonstop2h 52m
$204
ChicagoMontreal
ORD - YUL
ORDYUL
Chicago O'Hare Intl
Wed 3/18
7:15 am-10:20 am
Nonstop2h 05m
Montreal Pierre Elliott Trudeau Intl
Sun 3/22
9:25 am-11:10 am
Nonstop2h 45m
$204
ChicagoMontreal
ORD - YUL
ORDYUL
Chicago O'Hare Intl
Tue 3/31
7:13 am-10:40 am
Nonstop2h 27m
Montreal Pierre Elliott Trudeau Intl
Sun 4/5
6:10 am-8:00 am
Nonstop2h 50m
$204
ChicagoMontreal
ORD - YUL
ORDYUL
Chicago O'Hare Intl
Sat 3/28
6:00 pm-9:17 pm
Nonstop2h 17m
Montreal Pierre Elliott Trudeau Intl
Wed 4/1
9:45 am-11:37 am
Nonstop2h 52m
$204
Showing 1-10 of 60 results
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-YUL
ORD-YUL
MDW-YTZ
ORD-YOW
ORD-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-YUL
ORD-YUL
MDW-YTZ
ORD-YOW
What is the cheapest month to book a flight from Chicago to Region of Ontario?
Currently, October is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of $85). Flying from Chicago to Region of Ontario in January 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 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 February 5, 2026.
It’s optimal to fly from Chicago to Region of Ontario in the morning. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight at noon.
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 January 31, 2026.
Travelers seeking maximum savings on their Chicago to Region of Ontario flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 February 5, 2026.
The most flights from CHI to CAON are scheduled on a Monday (64 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 Chicago to Region of Ontario?
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 February 5, 2026.
See what other customers who have flown with Porter Airlines, Air Transat, and United 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.
Boarding
8.2
Crew
8.6
Overall
7.9
Entertainment
6.9
Food
7.5
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Boarding
8.2
Crew
8.6
Overall
7.9
Entertainment
6.9
Food
7.5
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Boarding
8.2
Crew
8.6
Overall
7.9
Entertainment
6.9
Food
7.5
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Boarding
8.2
Crew
8.6
Overall
7.9
Entertainment
6.9
Food
7.5
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Boarding
8.2
Crew
8.6
Overall
7.9
Entertainment
6.9
Food
7.5
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Boarding
8.2
Crew
8.6
Overall
7.9
Entertainment
6.9
Food
7.5
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
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.
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
Top destinations
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 February 5, 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 5 airlines flying from Chicago to Ontario
Discover the top 5 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 February 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$303 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$100 | Average$256 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$109 | Average$351 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$140 | Average$401 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$216 | Average$359 | FlexibilityNo cancel fee | On-time71% |