$95+ Cheap flights from Chicago (CHI) to Ontario
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
Oct 25 — Nov 11
Round-trip
1 adult, Economy
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Find cheap flights from Chicago to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Chicago to Ontario
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Cheapest flights from Chicago to OntarioExplore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2026.
Explore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2026.
This FlightHub deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:20 pm -
Nonstop1h 40m
Sat 10/171:45 pm -
Nonstop1h 50m
Deal found 9/20![Porter Airlines logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:20 pm -
Nonstop1h 46m
Fri 12/44:35 pm -
Nonstop2h 05m
Deal found 9/20![Porter Airlines logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 10/173:20 pm -
Nonstop1h 40m
Mon 10/1910:10 am -
Nonstop1h 50m
Deal found 9/21![Porter Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2512:20 pm -
Nonstop1h 46m
Tue 10/2710:35 am -
Nonstop2h 05m
Deal found 9/21![Porter Airlines logo]()
$214
This Mytrip deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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 10/83:20 pm -
Nonstop1h 40m
Sun 10/1110:10 am -
Nonstop1h 50m
Deal found 9/22![Porter Airlines logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:20 pm -
Nonstop1h 46m
Thu 10/2910:35 am -
Nonstop2h 05m
Deal found 9/22![Porter Airlines logo]()
$215
This Gotogate deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/193:45 pm -
Nonstop1h 46m
Thu 10/299:00 am -
1 stop6h 52m
Deal found 9/22![Air Canada logo]()
$215
This Trip.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:20 pm -
Nonstop1h 40m
Fri 10/161:45 pm -
Nonstop1h 50m
Deal found 9/22![Porter Airlines logo]()
$216
This Booking.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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 10/82:00 pm -
Nonstop1h 48m
Sun 10/1112:15 pm -
Nonstop2h 10m
Deal found 9/20![Air Canada logo]()
$216
This Mytrip deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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.
Tue 10/203:45 pm -
Nonstop1h 46m
Tue 10/276:55 pm -
Nonstop2h 03m
Deal found 9/22![Air Canada logo]()
$216
This Trip.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 10/1011:45 am -
Nonstop1h 40m
Sun 10/111:45 pm -
Nonstop1h 50m
Deal found 9/19![Porter Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/412:20 pm -
Nonstop1h 46m
Sat 11/144:35 pm -
Nonstop2h 05m
Deal found 9/20![Porter Airlines logo]()
$217
Best flights from Chicago to OntarioDiscover carefully curated flight deals from Chicago to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2026.
Discover carefully curated flight deals from Chicago to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:45 am -
Nonstop1h 40m
Sat 10/2410:10 am -
Nonstop1h 50m
Deal found 9/21![Porter Airlines logo]()
$214
This United Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 11/67:03 am -
Nonstop1h 44m
Sat 11/148:35 am -
Nonstop2h 09m
Deal found 9/19![United Airlines logo]()
$243
This United deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 10/257:03 am -
Nonstop1h 44m
Tue 10/274:30 pm -
Nonstop2h 13m
Deal found 9/21![Multiple Airlines logo]()
$243
This Trip.com deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/83:20 pm -
Nonstop1h 40m
Mon 10/121:45 pm -
Nonstop1h 50m
Deal found 9/23![Air Transat logo]()
$261
This Delta deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:44 pm -
1 stop3h 12m
Tue 10/136:00 am -
1 stop7h 47m
Deal found 9/19![Delta logo]()
$268
This KAYAK deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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.
Tue 10/62:00 pm -
Nonstop1h 48m
Thu 10/88:20 am -
1 stop4h 40m
Deal found 9/22![Air Canada logo]()
$358
This Mytrip deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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 10/83:20 pm -
Nonstop1h 40m
Sun 10/1110:10 am -
Nonstop1h 50m
Deal found 9/22![Porter Airlines logo]()
$215
This United Airlines deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:53 pm -
Nonstop1h 51m
Sat 10/241:00 pm -
Nonstop2h 05m
Deal found 9/20![United Airlines logo]()
$243
This Cheapflightsfares deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:20 pm -
Nonstop1h 40m
Mon 10/1910:10 am -
Nonstop1h 50m
Deal found 9/22![Porter Airlines logo]()
$221
This United deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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 12/1311:05 am -
Nonstop1h 58m
Thu 12/178:00 am -
1 stop7h 52m
Deal found 9/20![Multiple Airlines logo]()
$252
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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 11/247:03 am -
Nonstop1h 44m
Fri 11/278:35 am -
Nonstop2h 09m
Deal found 9/22![United Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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 10/81:27 pm -
1 stop8h 29m
Sun 10/112:26 pm -
1 stop4h 34m
Deal found 9/20![Delta logo]()
$268
This United Airlines deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/43:47 pm -
Nonstop1h 58m
Thu 11/1910:53 am -
Nonstop2h 04m
Deal found 9/20![United Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 11/19:29 am -
1 stop6h 50m
Mon 11/96:00 am -
1 stop7h 51m
Deal found 9/19![Delta logo]()
$268
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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 11/231:57 pm -
Nonstop1h 50m
Sat 11/288:35 am -
Nonstop2h 09m
Deal found 9/22![United Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 10/159:29 am -
1 stop3h 07m
Sun 10/1812:10 pm -
1 stop6h 50m
Deal found 9/21![Delta logo]()
$268
This United Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 10/105:53 pm -
Nonstop1h 51m
Mon 10/128:50 am -
Nonstop1h 58m
Deal found 9/21![United Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/49:29 am -
1 stop6h 50m
Thu 11/196:00 am -
1 stop7h 51m
Deal found 9/20![Delta logo]()
$268
This United deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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 10/82:00 pm -
Nonstop1h 48m
Sun 10/118:20 am -
1 stop4h 40m
Deal found 9/22![Multiple Airlines logo]()
$354
This United Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 11/67:03 am -
Nonstop1h 44m
Mon 11/97:26 pm -
Nonstop2h 22m
Deal found 9/21![United Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:29 am -
1 stop6h 50m
Wed 10/286:00 am -
1 stop4h 32m
Deal found 9/23![Delta logo]()
$268
This Cheapflightsfares deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:20 pm -
Nonstop1h 40m
Sun 10/111:45 pm -
Nonstop1h 50m
Deal found 9/20![Porter Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 10/99:20 pm -
Nonstop1h 39m
Mon 10/1210:15 am -
Nonstop2h 06m
Deal found 9/19![United Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/39:29 am -
1 stop6h 50m
Sun 11/1512:15 pm -
1 stop6h 49m
Deal found 9/21![Delta logo]()
$268
This Cheapflightsfares deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/911:45 am -
Nonstop1h 40m
Wed 10/1410:10 am -
Nonstop1h 50m
Deal found 9/21![Porter Airlines logo]()
$330
This United deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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 10/152:00 pm -
Nonstop1h 48m
Sun 10/1812:20 pm -
1 stop7h 26m
Deal found 9/20![Multiple Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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 10/186:44 pm -
1 stop3h 12m
Sun 10/2512:10 pm -
1 stop6h 50m
Deal found 9/20![Delta logo]()
$268
This United Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 10/304:40 pm -
1 stop5h 46m
Mon 11/28:35 am -
Nonstop2h 09m
Deal found 9/19![United Airlines logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:20 pm -
1 stop19h 07m
Tue 10/277:05 am -
2 stops17h 42m
Deal found 9/20![Multiple Airlines logo]()
$392
This Delta deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:27 pm -
1 stop8h 29m
Mon 10/2612:10 pm -
1 stop6h 50m
Deal found 9/19![Delta logo]()
$268
Last-minute flights from Chicago to OntarioDiscover last-minute flight deals from Chicago to Ontario. Data last updated September 25, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Ontario. Data last updated September 25, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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 10/83:20 pm -
Nonstop1h 40m
Sun 10/1110:10 am -
Nonstop1h 50m
Deal found 9/22![Porter Airlines logo]()
$215
This Booking.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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 10/82:00 pm -
Nonstop1h 48m
Sun 10/1112:15 pm -
Nonstop2h 10m
Deal found 9/20![Air Canada logo]()
$216
This Kissandfly.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:09 am -
Nonstop1h 45m
Sun 10/118:05 am -
Nonstop1h 55m
Deal found 9/20![Air Canada logo]()
$220
This Trip.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 10/1011:45 am -
Nonstop1h 40m
Sun 10/111:45 pm -
Nonstop1h 50m
Deal found 9/19![Porter Airlines logo]()
$217
This FlightHub deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:20 pm -
Nonstop1h 40m
Sat 10/171:45 pm -
Nonstop1h 50m
Deal found 9/20![Porter Airlines logo]()
$213
This Trip.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:20 pm -
Nonstop1h 40m
Fri 10/161:45 pm -
Nonstop1h 50m
Deal found 9/22![Porter Airlines logo]()
$216
This Cheapflightsfares deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:20 pm -
Nonstop1h 40m
Mon 10/191:45 pm -
Nonstop1h 50m
Deal found 9/22![Porter Airlines logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 10/173:20 pm -
Nonstop1h 40m
Mon 10/1910:10 am -
Nonstop1h 50m
Deal found 9/21![Porter Airlines logo]()
$214
This Gotogate deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/193:45 pm -
Nonstop1h 46m
Thu 10/299:00 am -
1 stop6h 52m
Deal found 9/22![Air Canada logo]()
$215
This Mytrip deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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.
Tue 10/203:45 pm -
Nonstop1h 46m
Tue 10/276:55 pm -
Nonstop2h 03m
Deal found 9/22![Air Canada logo]()
$216
This Trip.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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.
Sun 10/256:20 pm -
Nonstop1h 46m
Tue 10/2710:35 am -
Nonstop2h 05m
Deal found 9/22![Porter Airlines logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:20 pm -
Nonstop1h 46m
Thu 10/2910:35 am -
Nonstop2h 05m
Deal found 9/22![Porter Airlines logo]()
$215
One-way flights from Chicago to OntarioSearch for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Data last updated September 25, 2026.
Search for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Data last updated September 25, 2026.
This Air Canada deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/112:00 pm -
Nonstop1h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Air Canada logo]()
$95
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/712:59 pm -
Nonstop1h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![United Airlines logo]()
$95
This SmartFares deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” 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.
Sat 10/1011:45 am -
Nonstop1h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Air Transat logo]()
$96
This Air Canada deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:05 am -
1 stop6h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Air Canada logo]()
$104
This Air Canada deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:45 am -
1 stop5h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Air Canada logo]()
$104
This Delta deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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 10/185:29 pm -
1 stop4h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Delta logo]()
$105
This Delta deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” 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 10/186:44 pm -
1 stop3h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Delta logo]()
$105
This SmartFares deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” 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.
Mon 10/193:20 pm -
Nonstop1h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Air Transat logo]()
$106
This Kissandfly.com deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:20 pm -
Nonstop1h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Air Transat logo]()
$107
This FlightHub deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” 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.
Sun 10/183:20 pm -
Nonstop1h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Air Transat logo]()
$108
This Air Canada deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:00 pm -
Nonstop1h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Air Canada logo]()
$108
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:03 am -
Nonstop1h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![United Airlines logo]()
$108
Find flight deals from Chicago to Ontario
Keep the following information in mind while searching for Chicago to Ontario flight deals. Data was last updated September 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $213 (Kiwi.com) |
One-way from | $95 (Air Canada) |
Popular in | September |
Cheapest in | January |
Average price | $316 |
Good round-trip deal | $205 or less |
Good one-way deal | $87 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 25, 2026.
Use the filters below to find and compare flights from Chicago to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Wed 12/9
9:21 pm-11:59 pm
Nonstop1h 38m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$95
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Tue 10/20
5:53 pm-8:44 pm
Nonstop1h 51m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$95
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Fri 10/23
5:53 pm-8:44 pm
Nonstop1h 51m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$95
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Sun 10/25
8:29 am-5:19 pm
1 stop7h 50m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Sat 11/7
8:29 am-5:19 pm
1 stop7h 50m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Sun 11/15
9:30 am-1:30 pm
1 stop3h 00m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Wed 10/28
6:59 am-1:43 pm
1 stop5h 44m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Thu 11/5
9:29 am-5:19 pm
1 stop6h 50m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl
ORDYYZ
Chicago O'Hare Intl
Tue 10/13
9:52 pm-10:04 am
1 stop11h 12m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
ChicagoToronto
MDW Chicago Midway - YYZ Toronto Pearson Intl
MDWYYZ
Chicago Midway
Tue 10/20
9:29 am-1:36 pm
1 stop3h 07m
Toronto Pearson Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$105
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Chicago to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Chicago with our price prediction graph.
MDW-YTZ
ORD-YTZ
ORD-YYZ
MDW-YYZ
RFD-YYZ
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Chicago to Ontario
CHI-CAON
MDW-YTZ
ORD-YTZ
ORD-YYZ
MDW-YYZ
What is the cheapest month to book a flight from Chicago to Region of Ontario?
Currently, February is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of $288). Flying from Chicago to Region of Ontario in August is currently the most expensive (average of $368). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from CHI to ON?
Find hourly flight availability from Chicago to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 25, 2026.
It’s optimal to fly from Chicago to Region of Ontario in the evening. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight at noon.
Weekly flight availability from Chicago to Region of Ontario
Explore weekly flight availability from Chicago to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 25, 2026.
The most flights from CHI to CAON are scheduled on a Wednesday (68 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (24 on average).
How much does it cost to fly round-trip from Chicago to Region of Ontario?
Airfare is below average for this route at the moment.
Chicago to Region of Ontario flights typically cost between $261 and $416 in October.The cheapest round-trip price found within the last 5 days was $215 on Air Canada (Oct 19-Oct 29).
How far ahead should I book a flight from Chicago to Region of Ontario?
Booking 71 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to Region of Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from Chicago to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from Chicago to Ontario. Price data was last updated on September 19, 2026.
Travelers seeking maximum savings on their Chicago to Region of Ontario flight should consider departing on Saturday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated September 25, 2026.
See what other customers who have flown with Porter Airlines,Delta, andUnited Airlines from Chicago to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Overall
8.0
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Overall
8.0
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Overall
8.0
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Overall
8.0
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Overall
8.0
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Food
7.6
Comfort
8.0
Boarding
8.2
Entertainment
6.9
Overall
8.0
Crew
8.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Related info for your journey
Find useful and relevant information for your journey from Chicago to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Chicago to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Chicago to Ontario by cabin class
Find flights from Chicago to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Chicago and Ontario flights
Browse other Chicago and Ontario flight options. Last updated on September 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Chicago to Ontario
Discover the top 6 airlines that operate flights from Chicago to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$387 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$160 | Average$403 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$170 | Average$468 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$193 | Average$348 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$222 | Average$549 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$223 | Average$379 | FlexibilityNo cancel fee | On-time71% |