$188+ Cheap flights from Ottawa (YOW) to Illinois
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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
Oct 13 — Oct 201
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Ottawa 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 Ottawa to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ottawa to IllinoisExplore the most affordable flight options available from Ottawa to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2026.
Explore the most affordable flight options available from Ottawa to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:20 am -
1 stop10h 20m
Thu 10/155:30 pm -
1 stop11h 05m
Deal found 9/8![WestJet logo]()
$327
This deal was found by Cheapflights users on 9/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/179:15 am -
1 stop6h 20m
Wed 10/2111:45 am -
1 stop5h 07m
Deal found 9/9![Porter Airlines logo]()
$331
This Kissandfly.com deal was found by Cheapflights users on 9/10. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:01 pm -
1 stop6h 20m
Sun 10/1110:40 am -
Nonstop2h 19m
Deal found 9/10![Lufthansa logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:55 am -
1 stop8h 40m
Sun 10/113:20 pm -
1 stop8h 00m
Deal found 9/10![Multiple Airlines logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Thu 10/156:50 am -
1 stop8h 45m
Sun 10/183:20 pm -
1 stop8h 00m
Deal found 9/11![Multiple Airlines logo]()
$376
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Sat 10/246:55 am -
1 stop13h 53m
Sun 10/2510:15 am -
1 stop13h 29m
Deal found 9/10![Multiple Airlines logo]()
$377
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Tue 10/275:35 am -
1 stop13h 08m
Tue 11/312:50 pm -
1 stop10h 54m
Deal found 9/12![Multiple Airlines logo]()
$380
This Justfly.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:40 pm -
1 stop6h 00m
Mon 11/912:20 pm -
1 stop4h 54m
Deal found 9/7![Porter Airlines logo]()
$391
This Trip.com deal was found by Cheapflights users on 9/8. 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.
Fri 10/3012:15 pm -
1 stop6h 25m
Sun 11/112:20 pm -
1 stop4h 54m
Deal found 9/8![Porter Airlines logo]()
$393
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2512:15 pm -
1 stop6h 25m
Sun 11/112:20 pm -
1 stop4h 54m
Deal found 9/10![Porter Airlines logo]()
$394
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Sat 10/106:55 am -
2 stops14h 17m
Sun 10/119:55 am -
1 stop6h 40m
Deal found 9/10![Multiple Airlines logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:50 am -
1 stop8h 45m
Fri 10/93:20 pm -
1 stop3h 42m
Deal found 9/10![Multiple Airlines logo]()
$419
Best flights from Ottawa to IllinoisDiscover carefully curated flight deals from Ottawa to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
Discover carefully curated flight deals from Ottawa to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
This deal was found by Cheapflights users on 9/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/179:15 am -
1 stop6h 20m
Wed 10/2111:45 am -
1 stop5h 07m
Deal found 9/9![Porter Airlines logo]()
$331
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Tue 10/275:35 am -
1 stop13h 08m
Tue 11/312:50 pm -
1 stop10h 54m
Deal found 9/12![Multiple Airlines logo]()
$380
This Air Canada deal was found by Cheapflights users on 9/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:50 pm -
1 stop4h 51m
Mon 10/264:05 pm -
1 stop6h 50m
Deal found 9/9![Air Canada logo]()
$446
This American Airlines deal was found by Cheapflights users on 9/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:00 am -
1 stop6h 45m
Fri 10/238:06 am -
1 stop5h 49m
Deal found 9/12![American Airlines logo]()
$477
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Thu 10/156:25 am -
1 stop6h 48m
Tue 10/2011:35 am -
2 stops10h 00m
Deal found 9/8![United Airlines logo]()
$523
This Delta deal was found by Cheapflights users on 9/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:50 am -
2 stops10h 38m
Mon 10/262:25 pm -
2 stops9h 19m
Deal found 9/8![Delta logo]()
$568
This oojo deal was found by Cheapflights users on 9/11. 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.
Wed 10/76:55 am -
2 stops12h 05m
Thu 10/89:29 am -
2 stops13h 51m
Deal found 9/11![WestJet logo]()
$765
This Justfly.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:40 pm -
1 stop6h 00m
Mon 11/912:20 pm -
1 stop4h 54m
Deal found 9/7![Porter Airlines logo]()
$391
This Air Canada deal was found by Cheapflights users on 9/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/152:50 pm -
1 stop4h 51m
Tue 10/202:40 pm -
1 stop5h 40m
Deal found 9/8![Air Canada logo]()
$450
This FlightHub deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 10/158:00 am -
1 stop4h 00m
Sun 10/1811:45 am -
1 stop5h 07m
Deal found 9/7![Porter Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 10/226:00 am -
3 stops16h 21m
Sun 10/256:50 pm -
2 stops17h 21m
Deal found 9/11![United Airlines logo]()
$523
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 10/157:20 am -
1 stop10h 20m
Sun 10/186:58 pm -
1 stop27h 47m
Deal found 9/7![Multiple Airlines logo]()
$537
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 9/245:20 pm -
1 stop5h 01m
Mon 9/287:30 am -
1 stop14h 05m
Deal found 9/10![United Airlines logo]()
$523
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:25 pm -
2 stops16h 07m
Sat 10/1711:45 am -
1 stop6h 22m
Deal found 9/12![Multiple Airlines logo]()
$565
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Fri 10/236:00 am -
2 stops9h 17m
Fri 10/309:40 am -
2 stops11h 19m
Deal found 9/8![United Airlines logo]()
$523
This Porter Airlines deal was found by Cheapflights users on 9/9. 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.
Sun 11/812:15 pm -
1 stop6h 25m
Sun 2/1412:20 pm -
1 stop4h 54m
Deal found 9/9![Porter Airlines logo]()
$546
This FlightHub deal was found by Cheapflights users on 9/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:20 pm -
2 stops17h 20m
Fri 10/235:30 pm -
1 stop11h 05m
Deal found 9/8![Multiple Airlines logo]()
$575
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 10/86:25 am -
1 stop6h 48m
Thu 10/157:30 am -
1 stop8h 08m
Deal found 9/10![United Airlines logo]()
$524
This Porter Airlines deal was found by Cheapflights users on 9/9. 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.
Tue 11/1012:15 pm -
1 stop6h 25m
Fri 2/1912:20 pm -
1 stop4h 54m
Deal found 9/9![Porter Airlines logo]()
$546
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:25 pm -
2 stops16h 07m
Sun 10/113:20 pm -
1 stop3h 42m
Deal found 9/8![Multiple Airlines logo]()
$587
This Porter Airlines deal was found by Cheapflights users on 9/9. 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.
Mon 11/98:25 am -
1 stop4h 15m
Sun 2/1412:20 pm -
1 stop4h 54m
Deal found 9/9![Porter Airlines logo]()
$546
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:00 am -
3 stops14h 25m
Sat 10/3112:38 pm -
3 stops29h 20m
Deal found 9/9![American Airlines logo]()
$861
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Tue 9/228:50 pm -
1 stop15h 10m
Fri 9/253:20 pm -
1 stop17h 52m
Deal found 9/9![Porter Airlines logo]()
$553
This oojo deal was found by Cheapflights users on 9/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:55 am -
2 stops16h 41m
Sat 10/316:06 am -
2 stops17h 38m
Deal found 9/9![WestJet logo]()
$953
This Porter Airlines deal was found by Cheapflights users on 9/8. 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.
Fri 10/306:55 pm -
2 stops22h 19m
Sun 11/112:20 pm -
1 stop4h 54m
Deal found 9/8![Porter Airlines logo]()
$556
This Mytrip deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 10/158:15 pm -
2 stops15h 45m
Sun 10/183:20 pm -
1 stop3h 42m
Deal found 9/7![Multiple Airlines logo]()
$681
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Fri 12/46:15 am -
1 stop13h 25m
Mon 12/78:31 am -
1 stop4h 38m
Deal found 9/8![United Airlines logo]()
$682
This Porter Airlines deal was found by Cheapflights users on 9/9. 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.
Sun 11/812:15 pm -
1 stop6h 25m
Mon 2/1512:20 pm -
1 stop4h 54m
Deal found 9/9![Porter Airlines logo]()
$558
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/2410:00 am -
2 stops9h 43m
Sat 10/316:57 pm -
2 stops26h 59m
Deal found 9/9![United Airlines logo]()
$682
This WestJet deal was found by Cheapflights users on 9/8. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/65:30 am -
2 stops34h 46m
Tue 2/94:00 pm -
2 stops31h 44m
Deal found 9/8![WestJet logo]()
$1,075
Last-minute flights from Ottawa to IllinoisDiscover last-minute flight deals from Ottawa to Illinois. Data last updated September 13, 2026 and is based on user searches.
Discover last-minute flight deals from Ottawa to Illinois. Data last updated September 13, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:50 am -
1 stop8h 45m
Fri 10/93:20 pm -
1 stop3h 42m
Deal found 9/10![Multiple Airlines logo]()
$419
This Kissandfly.com deal was found by Cheapflights users on 9/10. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:01 pm -
1 stop6h 20m
Sun 10/1110:40 am -
Nonstop2h 19m
Deal found 9/10![Lufthansa logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:55 am -
1 stop8h 40m
Sun 10/113:20 pm -
1 stop8h 00m
Deal found 9/10![Multiple Airlines logo]()
$362
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Sat 10/106:55 am -
2 stops14h 17m
Sun 10/119:55 am -
1 stop6h 40m
Deal found 9/10![Multiple Airlines logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:20 am -
1 stop10h 20m
Thu 10/155:30 pm -
1 stop11h 05m
Deal found 9/8![WestJet logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Thu 10/156:50 am -
1 stop8h 45m
Sun 10/183:20 pm -
1 stop8h 00m
Deal found 9/11![Multiple Airlines logo]()
$376
This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:50 am -
1 stop7h 33m
Sun 10/183:45 pm -
1 stop7h 35m
Deal found 9/11![Multiple Airlines logo]()
$402
This deal was found by Cheapflights users on 9/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/179:15 am -
1 stop6h 20m
Wed 10/2111:45 am -
1 stop5h 07m
Deal found 9/9![Porter Airlines logo]()
$331
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Sat 10/246:55 am -
1 stop13h 53m
Sun 10/2510:15 am -
1 stop13h 29m
Deal found 9/10![Multiple Airlines logo]()
$377
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2512:15 pm -
1 stop6h 25m
Sun 11/112:20 pm -
1 stop4h 54m
Deal found 9/10![Porter Airlines logo]()
$394
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Tue 10/275:35 am -
1 stop13h 08m
Tue 11/312:50 pm -
1 stop10h 54m
Deal found 9/12![Multiple Airlines logo]()
$380
This Trip.com deal was found by Cheapflights users on 9/8. 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.
Fri 10/3012:15 pm -
1 stop6h 25m
Sun 11/112:20 pm -
1 stop4h 54m
Deal found 9/8![Porter Airlines logo]()
$393
One-way flights from Ottawa to IllinoisSearch for one-way flight options from Ottawa to Illinois. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
Search for one-way flight options from Ottawa to Illinois. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Fri 10/237:20 am -
1 stop10h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![WestJet logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Thu 11/195:30 am -
1 stop13h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$201
This Trip.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/106:25 pm -
1 stop15h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/46:25 pm -
1 stop17h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Mon 11/3010:20 am -
3 stops45h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:50 am -
1 stop8h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$213
This Flightnetwork deal was found by Cheapflights users on 9/8. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:55 am -
1 stop13h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Sun 11/223:25 pm -
1 stop22h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$232
This Mytrip deal was found by Cheapflights users on 9/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:50 am -
1 stop7h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$235
This Trip.com deal was found by Cheapflights users on 9/9. 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.
Tue 11/38:25 am -
1 stop4h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Porter Airlines logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:25 pm -
2 stops23h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Tue 11/37:00 am -
3 stops35h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$238
Find flight deals from Ottawa to Illinois
Keep the following information in mind while searching for Ottawa to Illinois flight deals. Data was last updated September 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $327 (Kiwi.com) |
One-way from | $188 (Kiwi.com) |
Popular in | January |
Cheapest in | February |
Average price | $538 |
Good round-trip deal | $540 or less |
Good one-way deal | $319 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ottawa 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 7,457,451 searches. Data last updated September 13, 2026.
Use the filters below to find and compare flights from Ottawa to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OttawaChicago
YOW Ottawa - MDW Chicago Midway
YOWMDW
Ottawa
Sun 10/4
6:25 pm-11:00 am
1 stop17h 35m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$209
OttawaSt. Louis
YOW Ottawa - STL Lambert-St Louis
YOWSTL
Ottawa
Mon 11/30
10:20 am-7:09 am
3 stops45h 49m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$211
OttawaChicago
YOW Ottawa - MDW Chicago Midway
YOWMDW
Ottawa
Mon 10/5
6:50 am-2:35 pm
1 stop8h 45m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$213
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Fri 10/23
7:20 am-4:40 pm
1 stop10h 20m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$225
OttawaChicago
YOW Ottawa - MDW Chicago Midway
YOWMDW
Ottawa
Mon 10/19
12:25 pm-11:00 am
2 stops23h 35m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$237
OttawaChicago
YOW Ottawa - MDW Chicago Midway
YOWMDW
Ottawa
Tue 11/3
7:05 am-5:47 pm
2 stops35h 42m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$243
Quickest round-trip
OttawaSt. Louis
YOW Ottawa - STL Lambert-St Louis
YOWSTL
Ottawa
Thu 10/8
2:50 pm-6:41 pm
1 stop4h 51m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$250
OttawaSt. Louis
YOW Ottawa - STL Lambert-St Louis
YOWSTL
Ottawa
Sat 10/24
10:00 am-2:00 pm
1 stop5h 00m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$254
OttawaChicago
YOW Ottawa - MDW Chicago Midway
YOWMDW
Ottawa
Sat 10/10
9:15 am-2:35 pm
1 stop6h 20m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$259
OttawaSt. Louis
YOW Ottawa - STL Lambert-St Louis
YOWSTL
Ottawa
Thu 10/8
2:00 pm-5:40 pm
3 stops28h 40m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$259
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ottawa to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Ottawa with our price prediction graph.
YOW-MDW
YOW-ORD
YOW-STL
YOW-CMI
YOW-BMI
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 Ottawa to Illinois
YOW-USIL
YOW-MDW
YOW-ORD
YOW-STL
YOW-CMI
What is the cheapest month to book a flight from Ottawa to Illinois?
Currently, March is the cheapest month in which you can book a flight from Ottawa to Illinois (average of $406). Flying from Ottawa to Illinois in January is currently the most expensive (average of $806). 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 YOW to IL?
Find hourly flight availability from Ottawa 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 September 13, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to Illinois as you normally would.
Weekly flight availability from Ottawa to Illinois
Explore weekly flight availability from Ottawa 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 September 13, 2026.
The most flights from YOW to USIL are scheduled on a Saturday (13 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 on average).
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 September 13, 2026.
See what other customers who have flown with Porter Airlines,United Airlines, andAir Canada from Ottawa to Illinois 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.
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Comfort
8.0
Overall
8.0
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Reviews
1 / 20
8.0
ExcellentD,Sep 2026
YHM - YVR
Related info for your journey
Find useful and relevant information for your journey from Ottawa 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
Top destinations
Alternative routes for Ottawa 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 Ottawa to Illinois by cabin class
Find flights from Ottawa to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ottawa and Illinois flights
Browse other Ottawa and Illinois flight options. Last updated on September 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Ottawa to Illinois flights
Consider these flights traveling from Ottawa to Illinois.
Top 2 airlines flying from Ottawa to Illinois
Discover the top 2 airlines that operate flights from Ottawa 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 7,457,451 searches. Data last updated September 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$521 | Average$724 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$653 | Average$918 | FlexibilityNo cancel fee | On-time67% |