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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — CHI
14 Feb — 21 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 15 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 15 January 2026.
Wed 11/27:00 a.m.
YOW
-
ORD
1 stop15h 03m
Multiple Airlines
Wed 18/27:00 a.m.
ORD
-
YOW
1 stop16h 25m
Multiple Airlines
Deal found 13/1C$ 357
Mon 2/24:15 p.m.
YOW
-
ORD
1 stop20h 07m
Multiple Airlines
Wed 18/27:00 a.m.
ORD
-
YOW
1 stop16h 25m
Multiple Airlines
Deal found 13/1C$ 359
Tue 10/24:15 p.m.
YOW
-
ORD
1 stop20h 07m
Multiple Airlines
Tue 17/24:43 p.m.
ORD
-
YOW
1 stop30h 42m
Multiple Airlines
Deal found 13/1C$ 364
Mon 2/24:15 p.m.
YOW
-
ORD
2 stops20h 32m
Multiple Airlines
Wed 4/27:20 a.m.
ORD
-
YOW
1 stop16h 05m
Multiple Airlines
Deal found 14/1C$ 370
Fri 30/14:20 p.m.
YOW
-
ORD
1 stop25h 20m
Multiple Airlines
Wed 18/27:00 a.m.
ORD
-
YOW
1 stop16h 25m
Multiple Airlines
Deal found 13/1C$ 379
Sat 7/23:55 p.m.
YOW
-
ORD
1 stop7h 47m
Multiple Airlines
Tue 10/212:44 p.m.
ORD
-
YOW
1 stop27h 29m
Multiple Airlines
Deal found 13/1C$ 384
Thu 29/17:00 a.m.
YOW
-
ORD
1 stop13h 38m
Multiple Airlines
Fri 30/14:38 p.m.
ORD
-
YOW
1 stop22h 52m
Multiple Airlines
Deal found 14/1C$ 386
Thu 12/28:40 a.m.
YOW
-
ORD
2 stops17h 00m
Multiple Airlines
Sun 15/26:51 p.m.
ORD
-
YOW
1 stop16h 49m
Multiple Airlines
Deal found 13/1C$ 393
Fri 30/14:20 p.m.
YOW
-
MDW
2 stops17h 23m
Multiple Airlines
Wed 18/211:05 a.m.
MDW
-
YOW
1 stop12h 34m
Multiple Airlines
Deal found 13/1C$ 449
Tue 10/27:00 a.m.
YOW
-
MDW
1 stop4h 05m
Multiple Airlines
Tue 17/211:00 a.m.
MDW
-
YOW
1 stop12h 39m
Multiple Airlines
Deal found 13/1C$ 456
Sun 22/28:40 a.m.
YOW
-
MDW
1 stop7h 40m
Multiple Airlines
Fri 27/211:05 a.m.
MDW
-
YOW
1 stop12h 34m
Multiple Airlines
Deal found 14/1C$ 460
Mon 2/24:20 p.m.
YOW
-
MDW
2 stops20h 45m
Multiple Airlines
Wed 18/211:05 a.m.
MDW
-
YOW
1 stop8h 49m
Multiple Airlines
Deal found 13/1C$ 478
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 15 January 2026.
Wed 11/27:00 a.m.
YOW
-
ORD
1 stop15h 03m
Multiple Airlines
Wed 18/27:00 a.m.
ORD
-
YOW
1 stop16h 25m
Multiple Airlines
Deal found 13/1C$ 357
Fri 6/27:00 a.m.
YOW
-
MDW
1 stop4h 05m
Porter Airlines
Tue 10/211:00 a.m.
MDW
-
YOW
1 stop5h 29m
Porter Airlines
Deal found 13/1C$ 509
Mon 2/24:20 p.m.
YOW
-
ORD
2 stops32h 27m
Multiple Airlines
Wed 18/27:00 a.m.
ORD
-
YOW
1 stop16h 25m
Multiple Airlines
Deal found 13/1C$ 377
Sat 7/28:40 a.m.
YOW
-
ORD
2 stops15h 02m
Multiple Airlines
Tue 10/212:44 p.m.
ORD
-
YOW
1 stop27h 29m
Multiple Airlines
Deal found 13/1C$ 377
Fri 30/14:20 p.m.
YOW
-
ORD
1 stop25h 20m
Multiple Airlines
Wed 18/27:00 a.m.
ORD
-
YOW
1 stop16h 25m
Multiple Airlines
Deal found 13/1C$ 379
Fri 13/26:55 p.m.
YOW
-
MDW
1 stop17h 55m
Porter Airlines
Wed 25/211:00 a.m.
MDW
-
YOW
1 stop3h 44m
Porter Airlines
Deal found 13/1C$ 516
Thu 12/23:55 p.m.
YOW
-
ORD
1 stop9h 45m
Multiple Airlines
Sun 15/26:51 p.m.
ORD
-
YOW
1 stop16h 49m
Multiple Airlines
Deal found 13/1C$ 396
Sun 22/24:35 p.m.
YOW
-
ORD
2 stops21h 28m
Multiple Airlines
Fri 27/26:40 a.m.
ORD
-
YOW
1 stop9h 45m
Multiple Airlines
Deal found 14/1C$ 417
Mon 16/23:55 p.m.
YOW
-
ORD
1 stop9h 45m
Multiple Airlines
Thu 19/25:15 a.m.
ORD
-
YOW
1 stop11h 10m
Multiple Airlines
Deal found 14/1C$ 432
Fri 30/14:20 p.m.
YOW
-
MDW
2 stops17h 23m
Multiple Airlines
Wed 18/211:05 a.m.
MDW
-
YOW
1 stop12h 34m
Multiple Airlines
Deal found 13/1C$ 449
Tue 10/27:00 a.m.
YOW
-
MDW
1 stop4h 05m
Multiple Airlines
Tue 17/211:00 a.m.
MDW
-
YOW
1 stop12h 39m
Multiple Airlines
Deal found 13/1C$ 456
Sun 22/28:40 a.m.
YOW
-
MDW
1 stop7h 40m
Multiple Airlines
Fri 27/211:05 a.m.
MDW
-
YOW
1 stop12h 34m
Multiple Airlines
Deal found 14/1C$ 460
Fri 6/29:15 a.m.
YOW
-
ORD
2 stops14h 27m
Multiple Airlines
Tue 10/27:20 a.m.
ORD
-
YOW
2 stops16h 19m
Multiple Airlines
Deal found 13/1C$ 466
Mon 2/24:20 p.m.
YOW
-
MDW
2 stops20h 45m
Multiple Airlines
Wed 18/211:05 a.m.
MDW
-
YOW
1 stop8h 49m
Multiple Airlines
Deal found 13/1C$ 478
Sun 15/212:10 p.m.
YOW
-
MDW
1 stop4h 10m
Multiple Airlines
Thu 26/37:30 a.m.
MDW
-
YOW
1 stop8h 55m
Multiple Airlines
Deal found 13/1C$ 491
Fri 30/14:20 p.m.
YOW
-
MDW
2 stops17h 23m
Multiple Airlines
Mon 2/21:00 p.m.
MDW
-
YOW
1 stop27h 13m
Multiple Airlines
Deal found 13/1C$ 492
Thu 12/38:40 a.m.
YOW
-
MDW
1 stop7h 40m
Multiple Airlines
Mon 16/39:51 p.m.
MDW
-
YOW
1 stop25h 07m
Multiple Airlines
Deal found 13/1C$ 500
Wed 11/26:50 p.m.
YOW
-
MDW
1 stop16h 20m
Multiple Airlines
Wed 18/211:05 a.m.
MDW
-
YOW
1 stop12h 34m
Multiple Airlines
Deal found 13/1C$ 513
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 15 January 2026.
Fri 13/25:11 p.m.
YOW
-
ORD
Nonstop2h 41m
United Airlines
Wed 25/26:04 p.m.
ORD
-
YOW
Nonstop2h 14m
United Airlines
Deal found 13/1C$ 774
Wed 1/45:20 p.m.
YOW
-
ORD
Nonstop2h 33m
United Airlines
Fri 3/46:21 p.m.
ORD
-
YOW
Nonstop2h 14m
United Airlines
Deal found 14/1C$ 775
Sun 15/211:10 a.m.
YOW
-
ORD
Nonstop2h 38m
United Airlines
Thu 26/36:04 p.m.
ORD
-
YOW
Nonstop2h 14m
United Airlines
Deal found 13/1C$ 782
Sun 15/36:20 a.m.
YOW
-
ORD
Nonstop2h 40m
United Airlines
Sat 21/37:25 a.m.
ORD
-
YOW
Nonstop2h 01m
United Airlines
Deal found 15/1C$ 814
Wed 11/26:20 a.m.
YOW
-
ORD
Nonstop2h 45m
United Airlines
Wed 18/26:04 p.m.
ORD
-
YOW
Nonstop2h 14m
United Airlines
Deal found 13/1C$ 824
Thu 26/26:20 a.m.
YOW
-
ORD
Nonstop2h 40m
Air Canada
Sat 7/32:00 p.m.
ORD
-
YOW
Nonstop2h 12m
Air Canada
Deal found 13/1C$ 852
Thu 12/35:11 p.m.
YOW
-
ORD
Nonstop2h 41m
Air Canada
Sun 15/36:04 p.m.
ORD
-
YOW
Nonstop2h 14m
Air Canada
Deal found 13/1C$ 856
Sat 7/26:20 a.m.
YOW
-
ORD
Nonstop2h 45m
United Airlines
Tue 10/21:55 p.m.
ORD
-
YOW
Nonstop2h 17m
United Airlines
Deal found 13/1C$ 866
Tue 10/25:11 p.m.
YOW
-
ORD
Nonstop2h 44m
Air Canada
Tue 17/21:55 p.m.
ORD
-
YOW
Nonstop2h 12m
Air Canada
Deal found 13/1C$ 898
Fri 6/25:11 p.m.
YOW
-
ORD
Nonstop2h 44m
Air Canada
Tue 10/21:55 p.m.
ORD
-
YOW
Nonstop2h 17m
Air Canada
Deal found 13/1C$ 939
Last-minute flights from Ottawa to Chicago
Discover last-minute flight deals from Ottawa to Chicago. Data last updated 15 January 2026 and is based on user searches.
Thu 29/17:00 a.m.
YOW
-
ORD
1 stop13h 38m
Multiple Airlines
Fri 30/14:38 p.m.
ORD
-
YOW
1 stop22h 52m
Multiple Airlines
Deal found 14/1C$ 386
Fri 30/14:20 p.m.
YOW
-
ORD
1 stop25h 20m
Multiple Airlines
Wed 18/27:00 a.m.
ORD
-
YOW
1 stop16h 25m
Multiple Airlines
Deal found 13/1C$ 379
Fri 30/14:20 p.m.
YOW
-
MDW
2 stops17h 23m
Multiple Airlines
Wed 18/211:05 a.m.
MDW
-
YOW
1 stop12h 34m
Multiple Airlines
Deal found 13/1C$ 449
Mon 2/24:15 p.m.
YOW
-
ORD
1 stop20h 07m
Multiple Airlines
Wed 18/27:00 a.m.
ORD
-
YOW
1 stop16h 25m
Multiple Airlines
Deal found 13/1C$ 359
Mon 2/24:15 p.m.
YOW
-
ORD
2 stops20h 32m
Multiple Airlines
Wed 4/27:20 a.m.
ORD
-
YOW
1 stop16h 05m
Multiple Airlines
Deal found 14/1C$ 370
Mon 2/24:20 p.m.
YOW
-
MDW
2 stops20h 45m
Multiple Airlines
Wed 18/211:05 a.m.
MDW
-
YOW
1 stop8h 49m
Multiple Airlines
Deal found 13/1C$ 478
Sat 7/23:55 p.m.
YOW
-
ORD
1 stop7h 47m
Multiple Airlines
Tue 10/212:44 p.m.
ORD
-
YOW
1 stop27h 29m
Multiple Airlines
Deal found 13/1C$ 384
Tue 10/24:15 p.m.
YOW
-
ORD
1 stop20h 07m
Multiple Airlines
Tue 17/24:43 p.m.
ORD
-
YOW
1 stop30h 42m
Multiple Airlines
Deal found 13/1C$ 364
Tue 10/27:00 a.m.
YOW
-
MDW
1 stop4h 05m
Multiple Airlines
Tue 17/211:00 a.m.
MDW
-
YOW
1 stop12h 39m
Multiple Airlines
Deal found 13/1C$ 456
Wed 11/27:00 a.m.
YOW
-
ORD
1 stop15h 03m
Multiple Airlines
Wed 18/27:00 a.m.
ORD
-
YOW
1 stop16h 25m
Multiple Airlines
Deal found 13/1C$ 357
Thu 12/28:40 a.m.
YOW
-
ORD
2 stops17h 00m
Multiple Airlines
Sun 15/26:51 p.m.
ORD
-
YOW
1 stop16h 49m
Multiple Airlines
Deal found 13/1C$ 393
Sun 22/28:40 a.m.
YOW
-
MDW
1 stop7h 40m
Multiple Airlines
Fri 27/211:05 a.m.
MDW
-
YOW
1 stop12h 34m
Multiple Airlines
Deal found 14/1C$ 460
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 15 January 2026.
Mon 2/24:15 p.m.
YOW
-
ORD
1 stop20h 07m
Multiple Airlines
Deal found 12/1C$ 207
Wed 28/14:15 p.m.
YOW
-
ORD
1 stop20h 07m
Multiple Airlines
Deal found 14/1C$ 218
Thu 5/23:55 p.m.
YOW
-
ORD
1 stop7h 47m
Multiple Airlines
Deal found 13/1C$ 227
Mon 23/21:20 p.m.
YOW
-
ORD
2 stops21h 02m
Multiple Airlines
Deal found 13/1C$ 233
Wed 8/45:40 a.m.
YOW
-
MDW
1 stop10h 40m
Multiple Airlines
Deal found 14/1C$ 236
Thu 9/45:40 a.m.
YOW
-
MDW
1 stop10h 40m
Multiple Airlines
Deal found 14/1C$ 238
Sat 28/23:55 p.m.
YOW
-
ORD
1 stop9h 45m
Multiple Airlines
Deal found 14/1C$ 245
Wed 18/24:15 p.m.
YOW
-
ORD
1 stop32h 09m
Multiple Airlines
Deal found 15/1C$ 247
Mon 27/43:35 p.m.
YOW
-
ORD
2 stops24h 06m
Multiple Airlines
Deal found 14/1C$ 254
Wed 8/44:35 p.m.
YOW
-
ORD
2 stops17h 05m
Multiple Airlines
Deal found 14/1C$ 256
Wed 21/17:00 a.m.
YOW
-
ORD
1 stop29h 22m
Multiple Airlines
Deal found 14/1C$ 257
Mon 23/24:40 p.m.
YOW
-
MDW
3 stops27h 27m
Multiple Airlines
Deal found 13/1C$ 270
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 15 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
Wed 11/2
7:00 a.m.-9:03 p.m.
1 stop15h 03m
Chicago O'Hare Intl
Wed 18/2
7:00 a.m.-12:25 a.m.
1 stop16h 25m
C$ 357
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Mon 2/2
4:20 p.m.-11:47 p.m.
2 stops32h 27m
Chicago O'Hare Intl
Wed 18/2
7:00 a.m.-12:25 a.m.
1 stop16h 25m
C$ 377
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Sat 7/2
8:40 a.m.-10:42 p.m.
2 stops15h 02m
Chicago O'Hare Intl
Tue 10/2
12:44 p.m.-5:13 p.m.
1 stop27h 29m
C$ 377
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Fri 30/1
4:20 p.m.-4:40 p.m.
1 stop25h 20m
Chicago O'Hare Intl
Wed 18/2
7:00 a.m.-12:25 a.m.
1 stop16h 25m
C$ 379
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Thu 12/2
3:55 p.m.-12:40 a.m.
1 stop9h 45m
Chicago O'Hare Intl
Sun 15/2
6:51 p.m.-12:40 p.m.
1 stop16h 49m
C$ 396
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Sun 22/2
4:35 p.m.-1:03 p.m.
2 stops21h 28m
Chicago O'Hare Intl
Fri 27/2
6:40 a.m.-5:25 p.m.
1 stop9h 45m
C$ 417
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Mon 16/2
3:55 p.m.-12:40 a.m.
1 stop9h 45m
Chicago O'Hare Intl
Thu 19/2
5:15 a.m.-5:25 p.m.
1 stop11h 10m
C$ 432
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Fri 30/1
4:20 p.m.-8:43 a.m.
2 stops17h 23m
Chicago Midway
Wed 18/2
11:05 a.m.-12:39 a.m.
1 stop12h 34m
C$ 449
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Tue 10/2
7:00 a.m.-10:05 a.m.
1 stop4h 05m
Chicago Midway
Tue 17/2
11:00 a.m.-12:39 a.m.
1 stop12h 39m
C$ 456
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Sun 22/2
8:40 a.m.-3:20 p.m.
1 stop7h 40m
Chicago Midway
Fri 27/2
11:05 a.m.-12:39 a.m.
1 stop12h 34m
C$ 460
Flights are sorted by cheapest round-trip flights first.
Deals found on 12/1
Showing 1-10 of 33 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 9 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$ 182). Flying from Ottawa to Chicago in March is currently the most expensive (average of C$ 346). 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 15 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 15 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).
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$ 447.
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 15 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.
What are the cheapest airlines flying from Ottawa to Chicago round-trip?
Currently priced at C$ 333, 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$ 467 and C$ 506, 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$ 204. While the most popular route (Ottawa - Chicago O'Hare Intl) can be booked for C$ 370 on average, our data indicates C$ 980 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$ 182). Flying from Ottawa to Chicago in March is currently the most expensive (average of C$ 346). 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 15 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 15 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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