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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — CHI
7 Feb — 14 Feb1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Ottawa to Chicago are usually found in May or June, booked 51 days in advance, depart on a Saturday or Friday and return on a Tuesday
Cheap flight deals from Ottawa to Chicago
Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Chicago (CHI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 8 January 2026.
Explore the most affordable flight options available from Ottawa to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 January 2026.
Thu 5/27:00 a.m.YOW - ORD
1 stop16h 36mMultiple Airlines
Sun 8/23:00 p.m.ORD - YOW
1 stop25h 25mMultiple Airlines
Deal found 6/1C$ 339
Tue 3/27:00 a.m.YOW - ORD
1 stop15h 03mMultiple Airlines
Tue 10/27:20 a.m.ORD - YOW
1 stop9h 05mMultiple Airlines
Deal found 6/1C$ 341
Thu 5/29:40 a.m.YOW - ORD
1 stop14h 36mMultiple Airlines
Tue 10/212:44 p.m.ORD - YOW
1 stop27h 29mMultiple Airlines
Deal found 6/1C$ 348
Fri 6/23:55 p.m.YOW - ORD
1 stop18h 17mMultiple Airlines
Tue 10/212:44 p.m.ORD - YOW
1 stop27h 29mMultiple Airlines
Deal found 6/1C$ 370
Thu 5/27:00 a.m.YOW - ORD
1 stop16h 36mMultiple Airlines
Thu 12/26:51 p.m.ORD - YOW
1 stop16h 49mMultiple Airlines
Deal found 8/1C$ 379
Fri 6/24:35 p.m.YOW - ORD
2 stops17h 37mMultiple Airlines
Mon 9/28:43 p.m.ORD - YOW
1 stop19h 42mMultiple Airlines
Deal found 6/1C$ 382
Thu 5/27:00 a.m.YOW - MDW
1 stop4h 05mMultiple Airlines
Tue 10/211:05 a.m.MDW - YOW
1 stop12h 34mMultiple Airlines
Deal found 6/1C$ 428
Thu 5/27:00 a.m.YOW - MDW
1 stop4h 10mMultiple Airlines
Thu 12/211:00 a.m.MDW - YOW
1 stop12h 39mMultiple Airlines
Deal found 8/1C$ 440
Mon 2/24:20 p.m.YOW - MDW
2 stops20h 45mMultiple Airlines
Sat 21/212:50 p.m.MDW - YOW
1 stop3h 49mMultiple Airlines
Deal found 7/1C$ 481
Fri 6/27:00 a.m.YOW - MDW
1 stop4h 10mMultiple Airlines
Mon 9/21:00 p.m.MDW - YOW
1 stop9h 58mMultiple Airlines
Deal found 6/1C$ 484
Fri 6/27:00 a.m.YOW - MDW
1 stop4h 05mMultiple Airlines
Tue 10/211:05 a.m.MDW - YOW
1 stop12h 34mMultiple Airlines
Deal found 6/1C$ 487
Mon 2/24:35 p.m.YOW - MDW
1 stop18h 35mPorter Airlines
Sat 21/212:50 p.m.MDW - YOW
1 stop3h 49mPorter Airlines
Deal found 7/1C$ 498
Best flights from Ottawa to Chicago
Discover carefully curated flight deals from Ottawa to Chicago that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 8 January 2026.
Thu 5/27:00 a.m.YOW - ORD
1 stop16h 36mMultiple Airlines
Sun 8/23:00 p.m.ORD - YOW
1 stop25h 25mMultiple Airlines
Deal found 6/1C$ 339
Mon 23/26:00 a.m.YOW - ORD
1 stop4h 50mAir Canada
Mon 23/22:30 p.m.ORD - YOW
1 stop8h 24mAir Canada
Deal found 6/1C$ 469
Mon 2/24:35 p.m.YOW - MDW
1 stop18h 35mPorter Airlines
Sat 21/212:50 p.m.MDW - YOW
1 stop3h 49mPorter Airlines
Deal found 7/1C$ 498
Thu 5/27:00 a.m.YOW - ORD
1 stop16h 36mMultiple Airlines
Thu 12/26:51 p.m.ORD - YOW
1 stop16h 49mMultiple Airlines
Deal found 8/1C$ 379
Fri 6/24:35 p.m.YOW - ORD
2 stops17h 37mMultiple Airlines
Mon 9/28:43 p.m.ORD - YOW
1 stop19h 42mMultiple Airlines
Deal found 6/1C$ 382
Fri 23/13:55 p.m.YOW - ORD
1 stop7h 47mMultiple Airlines
Sun 25/110:07 a.m.ORD - YOW
1 stop30h 08mMultiple Airlines
Deal found 6/1C$ 416
Thu 16/47:00 a.m.YOW - ORD
1 stop13h 48mMultiple Airlines
Sun 19/47:05 a.m.ORD - YOW
1 stop16h 20mMultiple Airlines
Deal found 6/1C$ 431
Thu 5/27:00 a.m.YOW - MDW
1 stop4h 10mMultiple Airlines
Thu 12/211:00 a.m.MDW - YOW
1 stop12h 39mMultiple Airlines
Deal found 8/1C$ 440
Sat 21/23:40 p.m.YOW - ORD
2 stops10h 00mMultiple Airlines
Sat 28/26:51 p.m.ORD - YOW
1 stop16h 44mMultiple Airlines
Deal found 6/1C$ 441
Fri 6/23:05 p.m.YOW - ORD
2 stops19h 07mMultiple Airlines
Tue 10/28:37 p.m.ORD - YOW
2 stops26h 48mMultiple Airlines
Deal found 6/1C$ 448
Thu 26/23:55 p.m.YOW - ORD
1 stop9h 45mMultiple Airlines
Sat 28/26:51 p.m.ORD - YOW
1 stop16h 44mMultiple Airlines
Deal found 8/1C$ 449
Mon 2/24:20 p.m.YOW - MDW
2 stops20h 45mMultiple Airlines
Sat 21/212:50 p.m.MDW - YOW
1 stop3h 49mMultiple Airlines
Deal found 7/1C$ 481
Fri 6/27:00 a.m.YOW - MDW
1 stop4h 10mMultiple Airlines
Mon 9/21:00 p.m.MDW - YOW
1 stop9h 58mMultiple Airlines
Deal found 6/1C$ 484
Fri 6/27:00 a.m.YOW - MDW
1 stop4h 05mMultiple Airlines
Tue 10/211:05 a.m.MDW - YOW
1 stop12h 34mMultiple Airlines
Deal found 6/1C$ 487
Thu 5/25:40 a.m.YOW - MDW
2 stops8h 06mMultiple Airlines
Tue 10/211:05 a.m.MDW - YOW
1 stop12h 34mMultiple Airlines
Deal found 6/1C$ 511
Thu 26/25:40 a.m.YOW - MDW
2 stops8h 06mMultiple Airlines
Sat 28/212:50 p.m.MDW - YOW
1 stop18h 09mMultiple Airlines
Deal found 8/1C$ 547
Tue 10/37:00 a.m.YOW - MDW
2 stops12h 13mMultiple Airlines
Sat 14/312:45 p.m.MDW - YOW
1 stop3h 44mMultiple Airlines
Deal found 6/1C$ 554
Fri 6/27:00 a.m.YOW - MDW
1 stop4h 10mMultiple Airlines
Sun 8/21:26 p.m.MDW - YOW
2 stops10h 13mMultiple Airlines
Deal found 7/1C$ 601
Tue 21/48:40 a.m.YOW - MDW
1 stop7h 40mMultiple Airlines
Sun 26/49:27 a.m.MDW - YOW
2 stops13h 55mMultiple Airlines
Deal found 8/1C$ 615
Direct flights from Ottawa to Chicago
Explore direct flight options from Ottawa to Chicago based on user searches, and compare prices and availability for your desired travel dates. Data last updated 8 January 2026.
Wed 15/45:20 p.m.YOW - ORD
Nonstop2h 33mUnited Airlines
Sun 19/410:43 a.m.ORD - YOW
Nonstop2h 16mUnited Airlines
Deal found 7/1C$ 755
Tue 10/311:10 a.m.YOW - ORD
Nonstop2h 38mUnited Airlines
Sat 14/37:25 a.m.ORD - YOW
Nonstop2h 01mUnited Airlines
Deal found 6/1C$ 756
Fri 6/25:11 p.m.YOW - ORD
Nonstop2h 44mUnited Airlines
Tue 10/26:00 p.m.ORD - YOW
Nonstop2h 18mUnited Airlines
Deal found 6/1C$ 762
Thu 5/25:11 p.m.YOW - ORD
Nonstop2h 44mUnited Airlines
Sun 8/26:00 p.m.ORD - YOW
Nonstop2h 18mUnited Airlines
Deal found 6/1C$ 763
Sun 15/35:11 p.m.YOW - ORD
Nonstop2h 41mUnited Airlines
Sat 21/36:04 p.m.ORD - YOW
Nonstop2h 14mUnited Airlines
Deal found 8/1C$ 793
Thu 5/26:20 a.m.YOW - ORD
Nonstop2h 45mUnited Airlines
Thu 12/21:55 p.m.ORD - YOW
Nonstop2h 12mUnited Airlines
Deal found 8/1C$ 800
Tue 3/25:11 p.m.YOW - ORD
Nonstop2h 44mUnited Airlines
Tue 10/21:55 p.m.ORD - YOW
Nonstop2h 17mUnited Airlines
Deal found 6/1C$ 804
Sat 21/211:10 a.m.YOW - ORD
Nonstop2h 38mAir Canada
Sat 28/27:25 a.m.ORD - YOW
Nonstop2h 01mAir Canada
Deal found 7/1C$ 832
Fri 6/25:11 p.m.YOW - ORD
Nonstop2h 44mAir Canada
Mon 9/26:00 p.m.ORD - YOW
Nonstop2h 18mAir Canada
Deal found 6/1C$ 835
Thu 5/26:20 a.m.YOW - ORD
Nonstop2h 45mAir Canada
Mon 9/21:55 p.m.ORD - YOW
Nonstop2h 17mAir Canada
Deal found 6/1C$ 836
Last-minute flights from Ottawa to Chicago
Discover last-minute flight deals from Ottawa to Chicago. Data last updated 8 January 2026 and is based on user searches.
Mon 2/24:20 p.m.YOW - MDW
2 stops20h 45mMultiple Airlines
Sat 21/212:50 p.m.MDW - YOW
1 stop3h 49mMultiple Airlines
Deal found 7/1C$ 481
Mon 2/24:35 p.m.YOW - MDW
1 stop18h 35mPorter Airlines
Sat 21/212:50 p.m.MDW - YOW
1 stop3h 49mPorter Airlines
Deal found 7/1C$ 498
Tue 3/27:00 a.m.YOW - ORD
1 stop15h 03mMultiple Airlines
Tue 10/27:20 a.m.ORD - YOW
1 stop9h 05mMultiple Airlines
Deal found 6/1C$ 341
Thu 5/27:00 a.m.YOW - ORD
1 stop16h 36mMultiple Airlines
Sun 8/23:00 p.m.ORD - YOW
1 stop25h 25mMultiple Airlines
Deal found 6/1C$ 339
Thu 5/29:40 a.m.YOW - ORD
1 stop14h 36mMultiple Airlines
Tue 10/212:44 p.m.ORD - YOW
1 stop27h 29mMultiple Airlines
Deal found 6/1C$ 348
Thu 5/27:00 a.m.YOW - ORD
1 stop16h 36mMultiple Airlines
Thu 12/26:51 p.m.ORD - YOW
1 stop16h 49mMultiple Airlines
Deal found 8/1C$ 379
Thu 5/27:00 a.m.YOW - MDW
1 stop4h 05mMultiple Airlines
Tue 10/211:05 a.m.MDW - YOW
1 stop12h 34mMultiple Airlines
Deal found 6/1C$ 428
Thu 5/27:00 a.m.YOW - MDW
1 stop4h 10mMultiple Airlines
Thu 12/211:00 a.m.MDW - YOW
1 stop12h 39mMultiple Airlines
Deal found 8/1C$ 440
Fri 6/23:55 p.m.YOW - ORD
1 stop18h 17mMultiple Airlines
Tue 10/212:44 p.m.ORD - YOW
1 stop27h 29mMultiple Airlines
Deal found 6/1C$ 370
Fri 6/24:35 p.m.YOW - ORD
2 stops17h 37mMultiple Airlines
Mon 9/28:43 p.m.ORD - YOW
1 stop19h 42mMultiple Airlines
Deal found 6/1C$ 382
Fri 6/27:00 a.m.YOW - MDW
1 stop4h 10mMultiple Airlines
Mon 9/21:00 p.m.MDW - YOW
1 stop9h 58mMultiple Airlines
Deal found 6/1C$ 484
Fri 6/27:00 a.m.YOW - MDW
1 stop4h 05mMultiple Airlines
Tue 10/211:05 a.m.MDW - YOW
1 stop12h 34mMultiple Airlines
Deal found 6/1C$ 487
One-way flights from Ottawa to Chicago
Search for one-way flight options from Ottawa to Chicago. Find affordable one-way fares based on user searches. Data last updated 8 January 2026.
Thu 5/27:00 a.m.YOW - ORD
1 stop16h 36mMultiple Airlines
Deal found 8/1C$ 196
Thu 5/23:05 p.m.YOW - MDW
2 stops29h 47mMultiple Airlines
Deal found 8/1C$ 214
Mon 23/34:15 p.m.YOW - ORD
1 stop26h 09mMultiple Airlines
Deal found 6/1C$ 236
Tue 10/37:00 a.m.YOW - ORD
2 stops12h 29mMultiple Airlines
Deal found 8/1C$ 241
Fri 23/13:05 p.m.YOW - ORD
2 stops8h 37mMultiple Airlines
Deal found 7/1C$ 246
Fri 16/17:00 a.m.YOW - ORD
1 stop29h 22mMultiple Airlines
Deal found 5/1C$ 250
Fri 20/23:55 p.m.YOW - ORD
1 stop9h 45mMultiple Airlines
Deal found 6/1C$ 252
Thu 15/17:00 a.m.YOW - ORD
1 stop13h 38mMultiple Airlines
Deal found 7/1C$ 253
Fri 12/67:45 a.m.YOW - ORD
1 stop9h 58mWestJet
Deal found 5/1C$ 254
Fri 23/14:35 p.m.YOW - MDW
3 stops44h 10mMultiple Airlines
Deal found 7/1C$ 278
Tue 10/35:40 a.m.YOW - MDW
2 stops13h 14mWestJet
Deal found 8/1C$ 352
Tue 10/37:00 a.m.YOW - MDW
1 stop4h 05mPorter Airlines
Deal found 8/1C$ 402
Cheapflights Fare Finder
Customize your flight search to find flights from Ottawa to Chicago 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 629,999 searches. Data last updated 8 January 2026.
Use the filters below to find and compare flights from Ottawa to Chicago that are best for you.
Fly from
Ottawa
Fly to
Chicago
Route
Depart
Return
Price
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Thu 5/2
7:00 a.m.-10:36 p.m.
1 stop16h 36m
Chicago O'Hare Intl
Sun 8/2
3:00 p.m.-5:25 p.m.
1 stop25h 25m
C$ 339
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Thu 5/2
7:00 a.m.-10:36 p.m.
1 stop16h 36m
Chicago O'Hare Intl
Thu 12/2
6:51 p.m.-12:40 p.m.
1 stop16h 49m
C$ 379
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Fri 6/2
4:35 p.m.-9:12 a.m.
2 stops17h 37m
Chicago O'Hare Intl
Mon 9/2
8:43 p.m.-5:25 p.m.
1 stop19h 42m
C$ 382
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Fri 23/1
3:55 p.m.-10:42 p.m.
1 stop7h 47m
Chicago O'Hare Intl
Sun 25/1
10:07 a.m.-5:15 p.m.
1 stop30h 08m
C$ 416
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Thu 16/4
7:00 a.m.-7:48 p.m.
1 stop13h 48m
Chicago O'Hare Intl
Sun 19/4
7:05 a.m.-12:25 a.m.
1 stop16h 20m
C$ 431
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Thu 5/2
7:00 a.m.-10:10 a.m.
1 stop4h 10m
Chicago Midway
Thu 12/2
11:00 a.m.-12:39 a.m.
1 stop12h 39m
C$ 440
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Sat 21/2
3:40 p.m.-12:40 a.m.
2 stops10h 00m
Chicago O'Hare Intl
Sat 28/2
6:51 p.m.-12:35 p.m.
1 stop16h 44m
C$ 441
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Fri 6/2
3:05 p.m.-9:12 a.m.
2 stops19h 07m
Chicago O'Hare Intl
Tue 10/2
8:37 p.m.-12:25 a.m.
2 stops26h 48m
C$ 448
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Thu 26/2
3:55 p.m.-12:40 a.m.
1 stop9h 45m
Chicago O'Hare Intl
Sat 28/2
6:51 p.m.-12:35 p.m.
1 stop16h 44m
C$ 449
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Mon 23/2
6:00 a.m.-9:50 a.m.
1 stop4h 50m
Chicago O'Hare Intl
Mon 23/2
2:30 p.m.-11:54 p.m.
1 stop8h 24m
C$ 469
Flights are sorted by cheapest round-trip flights first.
Deals found on 8/1
Showing 1-10 of 31 results
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Best time to book a flight from Ottawa to Chicago
Have a flexible travel schedule? Discover the best time to fly to Chicago from Ottawa with our price prediction graph.
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 Chicago
How far ahead should I book a flight from Ottawa to Chicago?
Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Chicago. Price data was last updated on 2 January 2026.
Booking 51 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to Chicago. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Ottawa to Chicago?
Currently, September is the cheapest month in which you can book a flight from Ottawa to Chicago (average of C$ 181). Flying from Ottawa to Chicago in March is currently the most expensive (average of C$ 344). 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 CHI?
Find hourly flight availability from Ottawa to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 8 January 2026.
When flying from Ottawa to Chicago, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from Ottawa to Chicago
Explore weekly flight availability from Ottawa to Chicago. 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 8 January 2026.
The most flights from YOW to CHI are scheduled on a Tuesday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).
How much does it cost to fly round-trip from Ottawa to Chicago?
What’s the top layover airport for flights from Ottawa to Chicago?
Share of one-stop round-trip flights from Ottawa to Chicago chosen by Cheapflights users in the past 12 months, using the same layover each way.
Toronto (YTZ) – chosen by Cheapflights users on 90% of one-stop itineraries from Ottawa to Chicago on Cheapflights.
What’s the cheapest layover airport for flights from Ottawa to Chicago?
Average round-trip fare for 1-stop flights from Ottawa to Chicago, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 445.
What’s the fastest layover option from Ottawa to Chicago?
Shortest average travel time for 1-stop one-way flights from Ottawa to Chicago, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 4h 20m.
Which airport typically offers the quickest layover for flights from Ottawa to Chicago?
Average layover duration for 1-stop one-way flights from Ottawa to Chicago, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 19m.
Reviews of airlines servicing Chicago
Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated 8 January 2026.
Get a feel of what it's like to fly with Porter Airlines,United Airlines, andAir Canada from Ottawa to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
It's good. Planes are new and fresh. WiFi is best and stands out
Related info for your journey
Find useful and relevant information for your journey from Ottawa to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly from for flights from Ottawa to Chicago?
Ottawa (YOW), located 10.6 km from the city centre, is the airport you fly out of when you book flights from Ottawa to Chicago. 3 airlines have flights from Ottawa to Chicago on a regular basis. Booking flights from Ottawa to Chicago should not be difficult; the airport handles an average of 7 outbound flights to Chicago per day.
How long is the flight from Ottawa to Chicago?
Departing from Ottawa to Chicago will take you 18h 35m. There are 1048 km between Ottawa and Chicago.
What are the cheapest airlines flying from Ottawa to Chicago round-trip?
Currently priced at C$ 331, Porter Airlines will fly you from Ottawa to Chicago and back. In addition to Porter Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Air Canada - these airlines can fly you to your destination from C$ 464 and C$ 504, respectively. You may be able to fly from Ottawa to Chicago for 44% less than the average price by searching for these airlines.
What are the most reliable airlines from Ottawa to Chicago?
The top 3 most reliable airlines when flying from Ottawa to Chicago are SkyWest Airlines (100%), ANA (83%) and Avianca (82%).
What are the cheapest flights from Ottawa to Chicago?
Looking at all options, your cheapest flight can be booked for C$ 202. While the most popular route (Ottawa - Chicago O'Hare Intl) can be booked for C$ 341 on average, our data indicates C$ 978 when flying from Ottawa to Chicago.
Can I find deals for business class flights from Ottawa to Chicago?
Yes. Cheapflights offers flight deals from Ottawa to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Ottawa to Chicago?
Currently, September is the cheapest month in which you can book a flight from Ottawa to Chicago (average of C$ 181). Flying from Ottawa to Chicago in March is currently the most expensive (average of C$ 344). 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.
Explore flights to Chicago departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 8 January 2026.
Discover the top 3 airlines that operate flights from Ottawa to Chicago. 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 629,999 searches. Data last updated 8 January 2026.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Ottawa to Chicago?
When you search for this flight from Ottawa to Chicago, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from Ottawa to Chicago?
Cheapflights helps you find that perfect flight to Chicago from Ottawa by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Ottawa to Chicago with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to Chicago flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Ottawa to Chicago become cheaper?
Yes, Cheapflights offers price alerts on Ottawa to Chicago flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.
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