$184+ Cheap flights from Ottawa (YOW) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
May 30 — Jun 61
Round-trip
1 adult, Economy
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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 April 30, 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 April 30, 2026.
This Air Canada deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:40 pm
YOW
- STL
1 stop6h 45m
Air Canada
Sun 5/247:05 am
STL
- YOW
1 stop5h 00m
Air Canada
Deal found 4/28![Air Canada logo]()
$314
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:50 pm
YOW
- STL
1 stop6h 45m
United Airlines
Wed 5/276:00 am
STL
- YOW
1 stop9h 38m
United Airlines
Deal found 4/26![United Airlines logo]()
$320
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:44 am
YOW
- STL
1 stop11h 32m
United Airlines
Wed 6/36:00 am
STL
- YOW
1 stop9h 38m
United Airlines
Deal found 4/27![United Airlines logo]()
$321
This Air Canada deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/127:00 am
YOW
- STL
1 stop6h 06m
Air Canada
Fri 6/192:15 pm
STL
- YOW
1 stop6h 00m
Air Canada
Deal found 4/28![Air Canada logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:00 am
YOW
- ORD
2 stops17h 13m
Multiple Airlines
Tue 5/265:30 pm
ORD
- YOW
1 stop23h 30m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/2510:10 am
YOW
- MDW
2 stops49h 59m
Multiple Airlines
Mon 6/110:15 am
MDW
- YOW
1 stop4h 44m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$377
This Bravofly deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/1411:00 am
YOW
- MDW
1 stop4h 35m
Porter Airlines
Sun 6/213:20 pm
MDW
- YOW
1 stop3h 44m
Porter Airlines
Deal found 4/29![Porter Airlines logo]()
$380
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:20 am
YOW
- ORD
1 stop10h 20m
WestJet
Mon 5/255:30 pm
ORD
- YOW
1 stop11h 05m
WestJet
Deal found 4/29![WestJet logo]()
$391
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/125:05 am
YOW
- STL
2 stops11h 41m
United Airlines
Fri 6/192:15 pm
STL
- YOW
1 stop6h 00m
United Airlines
Deal found 4/28![United Airlines logo]()
$392
This Flighttix deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/128:00 am
YOW
- MDW
1 stop7h 35m
Porter Airlines
Fri 6/193:20 pm
MDW
- YOW
1 stop3h 44m
Porter Airlines
Deal found 4/28![Porter Airlines logo]()
$400
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:00 am
YOW
- ORD
1 stop30h 37m
Multiple Airlines
Thu 6/412:59 pm
ORD
- YOW
1 stop22h 18m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$400
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:40 am
YOW
- ORD
1 stop6h 37m
American Airlines
Mon 5/258:08 am
ORD
- YOW
1 stop5h 22m
American Airlines
Deal found 4/29![American Airlines logo]()
$401
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 April 30, 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 April 30, 2026.
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/246:25 am
YOW
- STL
1 stop10h 21m
United Airlines
Sat 8/81:13 pm
STL
- YOW
1 stop7h 22m
United Airlines
Deal found 4/28![United Airlines logo]()
$320
This Air Canada deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:40 pm
YOW
- STL
1 stop6h 45m
Air Canada
Sun 5/247:05 am
STL
- YOW
1 stop5h 00m
Air Canada
Deal found 4/30![Air Canada logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/67:00 am
YOW
- MDW
2 stops16h 02m
Multiple Airlines
Sun 6/710:15 am
MDW
- YOW
1 stop3h 39m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$449
This FlightHub deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2411:00 am
YOW
- MDW
1 stop4h 35m
Porter Airlines
Sun 7/263:20 pm
MDW
- YOW
1 stop5h 24m
Porter Airlines
Deal found 4/29![Porter Airlines logo]()
$449
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:52 pm
YOW
- STL
2 stops7h 31m
United Airlines
Wed 5/276:00 am
STL
- YOW
1 stop9h 38m
United Airlines
Deal found 4/25![United Airlines logo]()
$320
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:25 am
YOW
- STL
1 stop6h 46m
United Airlines
Wed 6/36:00 am
STL
- YOW
1 stop9h 38m
United Airlines
Deal found 4/28![United Airlines logo]()
$320
This FlightHub deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2911:00 am
YOW
- MDW
1 stop4h 35m
Porter Airlines
Sun 5/313:20 pm
MDW
- YOW
1 stop5h 24m
Porter Airlines
Deal found 4/25![Porter Airlines logo]()
$461
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/52:20 pm
YOW
- MDW
2 stops21h 44m
Multiple Airlines
Sun 6/710:15 am
MDW
- YOW
1 stop6h 39m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$489
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/126:25 am
YOW
- BMI
1 stop8h 58m
United Airlines
Fri 6/196:00 am
BMI
- YOW
1 stop14h 35m
United Airlines
Deal found 4/28![United Airlines logo]()
$414
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/303:30 pm
YOW
- MDW
1 stop19h 15m
Porter Airlines
Tue 6/210:25 am
MDW
- YOW
1 stop6h 29m
Porter Airlines
Deal found 4/25![Porter Airlines logo]()
$475
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:25 am
YOW
- BMI
1 stop7h 25m
United Airlines
Sat 8/296:00 am
BMI
- YOW
2 stops16h 54m
United Airlines
Deal found 4/29![United Airlines logo]()
$419
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/52:20 pm
YOW
- ORD
1 stop5h 18m
Multiple Airlines
Sun 6/712:59 pm
ORD
- YOW
1 stop22h 18m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$532
This Porter Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/2611:00 am
YOW
- MDW
1 stop4h 35m
Porter Airlines
Fri 8/283:20 pm
MDW
- YOW
1 stop3h 44m
Porter Airlines
Deal found 4/26![Porter Airlines logo]()
$521
This Air Canada deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/159:55 am
YOW
- ORD
1 stop4h 15m
Air Canada
Sat 6/2710:41 am
ORD
- YOW
Nonstop2h 18m
Air Canada
Deal found 4/25![Air Canada logo]()
$633
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:00 am
YOW
- MDW
2 stops16h 02m
Multiple Airlines
Tue 6/210:25 am
MDW
- YOW
1 stop6h 29m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$537
This FlightHub deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/69:35 am
YOW
- MDW
1 stop25h 00m
Porter Airlines
Sun 6/73:20 pm
MDW
- YOW
1 stop3h 44m
Porter Airlines
Deal found 4/28![Porter Airlines logo]()
$522
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:20 pm
YOW
- MDW
2 stops21h 49m
Multiple Airlines
Fri 5/153:20 pm
MDW
- YOW
1 stop3h 44m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$558
This Justfly.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1911:00 am
YOW
- MDW
1 stop4h 35m
Porter Airlines
Sat 6/2710:25 am
MDW
- YOW
1 stop7h 44m
Porter Airlines
Deal found 4/25![Porter Airlines logo]()
$547
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:30 pm
YOW
- ORD
2 stops15h 02m
United Airlines
Thu 8/276:00 am
ORD
- YOW
1 stop9h 15m
United Airlines
Deal found 4/29![United Airlines logo]()
$584
This Porter Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/98:00 am
YOW
- MDW
1 stop26h 35m
Porter Airlines
Sat 6/1310:15 am
MDW
- YOW
1 stop7h 39m
Porter Airlines
Deal found 4/29![Porter Airlines logo]()
$594
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/196:25 am
YOW
- ORD
Nonstop2h 20m
United Airlines
Sat 6/2710:41 am
ORD
- YOW
Nonstop2h 18m
United Airlines
Deal found 4/25![United Airlines logo]()
$636
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:20 pm
YOW
- ORD
Nonstop2h 27m
United Airlines
Sat 7/116:22 pm
ORD
- YOW
Nonstop2h 13m
United Airlines
Deal found 4/26![United Airlines logo]()
$636
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:25 am
YOW
- ORD
Nonstop2h 20m
United Airlines
Sun 5/311:55 pm
ORD
- YOW
Nonstop2h 12m
United Airlines
Deal found 4/28![United Airlines logo]()
$636
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1310:44 am
YOW
- ORD
Nonstop2h 27m
United Airlines
Sat 6/2710:41 am
ORD
- YOW
Nonstop2h 18m
United Airlines
Deal found 4/26![United Airlines logo]()
$636
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:25 am
YOW
- ORD
Nonstop2h 19m
United Airlines
Sun 8/306:21 pm
ORD
- YOW
Nonstop2h 14m
United Airlines
Deal found 4/26![United Airlines logo]()
$636
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:20 pm
YOW
- ORD
Nonstop2h 27m
United Airlines
Sun 6/76:22 pm
ORD
- YOW
Nonstop2h 13m
United Airlines
Deal found 4/28![United Airlines logo]()
$636
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:25 am
YOW
- ORD
Nonstop2h 20m
United Airlines
Sat 6/1310:41 am
ORD
- YOW
Nonstop2h 18m
United Airlines
Deal found 4/28![United Airlines logo]()
$636
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:25 am
YOW
- ORD
Nonstop2h 20m
United Airlines
Mon 6/16:22 pm
ORD
- YOW
Nonstop2h 13m
United Airlines
Deal found 4/26![United Airlines logo]()
$636
Last-minute flights from Ottawa to IllinoisDiscover last-minute flight deals from Ottawa to Illinois. Data last updated April 30, 2026 and is based on user searches.
Discover last-minute flight deals from Ottawa to Illinois. Data last updated April 30, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:00 am
YOW
- ORD
1 stop6h 43m
American Airlines
Sun 5/178:06 am
ORD
- YOW
1 stop5h 49m
American Airlines
Deal found 4/25![American Airlines logo]()
$496
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/109:05 am
YOW
- ORD
1 stop10h 33m
Multiple Airlines
Sun 5/175:05 am
ORD
- YOW
2 stops18h 15m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$546
This Trip.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:00 am
YOW
- MDW
1 stop4h 35m
Porter Airlines
Tue 5/263:20 pm
MDW
- YOW
1 stop5h 24m
Porter Airlines
Deal found 4/26![Porter Airlines logo]()
$453
This Air Canada deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:40 pm
YOW
- STL
1 stop6h 45m
Air Canada
Sun 5/247:05 am
STL
- YOW
1 stop5h 00m
Air Canada
Deal found 4/28![Air Canada logo]()
$314
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:50 pm
YOW
- STL
1 stop6h 45m
United Airlines
Wed 5/276:00 am
STL
- YOW
1 stop9h 38m
United Airlines
Deal found 4/26![United Airlines logo]()
$320
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:52 pm
YOW
- STL
2 stops7h 31m
United Airlines
Sun 5/246:00 am
STL
- YOW
1 stop15h 05m
United Airlines
Deal found 4/27![United Airlines logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/2510:10 am
YOW
- MDW
2 stops49h 59m
Multiple Airlines
Mon 6/110:15 am
MDW
- YOW
1 stop4h 44m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$377
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/262:20 pm
YOW
- MDW
2 stops21h 49m
Multiple Airlines
Tue 6/210:15 am
MDW
- YOW
1 stop3h 39m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$445
This Flighttix deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:00 am
YOW
- MDW
1 stop4h 35m
Porter Airlines
Sun 5/313:20 pm
MDW
- YOW
1 stop3h 44m
Porter Airlines
Deal found 4/27![Porter Airlines logo]()
$428
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2911:00 am
YOW
- MDW
1 stop4h 35m
Porter Airlines
Sun 5/313:20 pm
MDW
- YOW
1 stop3h 44m
Porter Airlines
Deal found 4/29![Porter Airlines logo]()
$430
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/293:30 pm
YOW
- MDW
1 stop19h 15m
Porter Airlines
Mon 6/110:15 am
MDW
- YOW
1 stop4h 44m
Porter Airlines
Deal found 4/26![Porter Airlines logo]()
$465
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/309:35 am
YOW
- MDW
1 stop25h 10m
Porter Airlines
Mon 6/110:15 am
MDW
- YOW
1 stop3h 39m
Porter Airlines
Deal found 4/26![Porter Airlines logo]()
$416
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 April 30, 2026.
Search for one-way flight options from Ottawa to Illinois. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:00 am
YOW
- ORD
2 stops16h 14m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$184
This Air Canada deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/77:00 am
YOW
- STL
1 stop6h 06m
Air Canada
Deal found 4/27![Air Canada logo]()
$187
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/910:44 am
YOW
- STL
1 stop6h 02m
United Airlines
Deal found 4/25![United Airlines logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:00 am
YOW
- STL
2 stops28h 29m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$191
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:25 am
YOW
- STL
1 stop10h 21m
United Airlines
Deal found 4/30![United Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:00 am
YOW
- MDW
3 stops40h 02m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:00 am
YOW
- STL
3 stops26h 47m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/127:00 am
YOW
- STL
2 stops18h 09m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:00 am
YOW
- MDW
2 stops40h 02m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$216
This oojo deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:20 am
YOW
- ORD
1 stop10h 20m
WestJet
Deal found 4/29![WestJet logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:55 pm
YOW
- ORD
3 stops26h 56m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$218
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:00 am
YOW
- ORD
2 stops16h 14m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$219
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 April 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $314 (Air Canada) |
One-way from | $184 (Kiwi.com) |
Popular in | January |
Cheapest in | February |
Average price | $476 |
Good round-trip deal | $409 or less |
Good one-way deal | $252 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 2,558,603 searches. Data last updated April 30, 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
OttawaSt. Louis
YOW - STL
YOWSTL
Ottawa
Fri 7/24
6:25 am-3:46 pm
1 stop10h 21m
Lambert-St Louis
Sat 8/8
1:13 pm-9:35 pm
1 stop7h 22m
$320
OttawaSt. Louis
YOW - STL
YOWSTL
Ottawa
Sat 5/23
2:52 pm-9:23 pm
2 stops7h 31m
Lambert-St Louis
Wed 5/27
6:00 am-4:38 pm
1 stop9h 38m
$320
OttawaSt. Louis
YOW - STL
YOWSTL
Ottawa
Tue 6/2
6:25 am-12:11 pm
1 stop6h 46m
Lambert-St Louis
Wed 6/3
6:00 am-4:38 pm
1 stop9h 38m
$320
OttawaSt. Louis
YOW - STL
YOWSTL
Ottawa
Sat 5/23
2:40 pm-8:25 pm
1 stop6h 45m
Lambert-St Louis
Sun 5/24
7:05 am-1:05 pm
1 stop5h 00m
$323
OttawaBloomington
YOW - BMI
YOWBMI
Ottawa
Fri 6/12
6:25 am-2:23 pm
1 stop8h 58m
Bloomington-Normal
Fri 6/19
6:00 am-9:35 pm
1 stop14h 35m
$414
OttawaBloomington
YOW - BMI
YOWBMI
Ottawa
Tue 8/25
6:25 am-12:50 pm
1 stop7h 25m
Bloomington-Normal
Sat 8/29
6:00 am-11:54 pm
2 stops16h 54m
$419
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Sat 6/6
7:00 am-10:02 pm
2 stops16h 02m
Chicago Midway
Sun 6/7
10:15 am-2:54 pm
1 stop3h 39m
$449
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Fri 7/24
11:00 am-2:35 pm
1 stop4h 35m
Chicago Midway
Sun 7/26
3:20 pm-9:44 pm
1 stop5h 24m
$449
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Fri 5/29
11:00 am-2:35 pm
1 stop4h 35m
Chicago Midway
Sun 5/31
3:20 pm-9:44 pm
1 stop5h 24m
$461
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Sat 5/30
3:30 pm-9:45 am
1 stop19h 15m
Chicago Midway
Tue 6/2
10:25 am-5:54 pm
1 stop6h 29m
$475
Showing 1-10 of 54 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-ORD
YOW-STL
YOW-MDW
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-ORD
YOW-STL
YOW-MDW
YOW-BMI
How far ahead should I book a flight from Ottawa to Illinois?
The price you pay for your flight from Ottawa to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 29 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Ottawa to Illinois?
Currently, August is the cheapest month in which you can book a flight from Ottawa to Illinois (average of $131). Flying from Ottawa to Illinois in January is currently the most expensive (average of $539). 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 April 30, 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 April 30, 2026.
The most flights from YOW to USIL are scheduled on a Monday (12 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (12 on average).
How much does it cost to fly round-trip from Ottawa to Illinois?
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated April 30, 2026.
See what other customers who have flown with Porter Airlines and United Airlines 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.
Boarding
8.2
Entertainment
7.0
Food
7.6
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Boarding
8.2
Entertainment
7.0
Food
7.6
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Boarding
8.2
Entertainment
7.0
Food
7.6
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
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.
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Alternative routes for Ottawa to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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Ottawa and Illinois flights
Browse other Ottawa and Illinois flight options. Last updated on April 30, 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 airline flying from Ottawa to Illinois
Discover the top airline 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 2,558,603 searches. Data last updated April 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$324 | Average$580 | FlexibilityNo cancel fee | On-time69% |