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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — CHI
22 Dec — 29 Dec1
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 22 days in advance, depart on a Saturday or Friday and return on a Wednesday
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 22 November 2025.
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 22 November 2025.
Mon 8/124:15 p.m.YOW - ORD
1 stop19h 53mMultiple Airlines
Wed 10/125:00 a.m.ORD - YOW
1 stop11h 25mMultiple Airlines
Deal found 20/11C$ 436
Sat 13/129:35 a.m.YOW - ORD
2 stops15h 34mMultiple Airlines
Mon 15/123:26 p.m.ORD - YOW
1 stop24h 59mMultiple Airlines
Deal found 20/11C$ 459
Fri 12/129:30 a.m.YOW - MDW
1 stop14h 09mMultiple Airlines
Mon 15/123:10 p.m.MDW - YOW
1 stop25h 03mMultiple Airlines
Deal found 20/11C$ 471
Fri 5/124:20 p.m.YOW - ORD
1 stop23h 01mMultiple Airlines
Mon 8/127:20 a.m.ORD - YOW
1 stop8h 53mMultiple Airlines
Deal found 20/11C$ 474
Fri 12/124:15 p.m.YOW - ORD
1 stop8h 54mMultiple Airlines
Mon 15/123:26 p.m.ORD - YOW
1 stop24h 59mMultiple Airlines
Deal found 20/11C$ 475
Thu 4/129:30 a.m.YOW - ORD
3 stops26h 38mMultiple Airlines
Mon 8/125:00 a.m.ORD - YOW
1 stop18h 25mMultiple Airlines
Deal found 19/11C$ 479
Mon 8/124:15 p.m.YOW - ORD
1 stop19h 53mMultiple Airlines
Fri 12/121:34 p.m.ORD - YOW
2 stops33h 51mMultiple Airlines
Deal found 20/11C$ 496
Thu 4/129:30 a.m.YOW - MDW
1 stop13h 28mMultiple Airlines
Sun 7/126:37 p.m.MDW - YOW
1 stop21h 36mMultiple Airlines
Deal found 20/11C$ 512
Mon 8/129:30 a.m.YOW - MDW
1 stop13h 28mMultiple Airlines
Fri 12/123:52 p.m.MDW - YOW
1 stop24h 21mMultiple Airlines
Deal found 20/11C$ 523
Sat 13/128:40 a.m.YOW - MDW
1 stop4h 10mPorter Airlines
Mon 15/124:15 p.m.MDW - YOW
1 stop3h 39mPorter Airlines
Deal found 20/11C$ 530
Thu 25/1212:10 p.m.YOW - MDW
1 stop4h 10mPorter Airlines
Mon 29/1211:00 a.m.MDW - YOW
1 stop5h 29mPorter Airlines
Deal found 20/11C$ 541
Thu 25/1212:10 p.m.YOW - MDW
1 stop4h 10mPorter Airlines
Thu 1/14:15 p.m.MDW - YOW
1 stop5h 14mPorter Airlines
Deal found 20/11C$ 543
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 22 November 2025.
Thu 8/17:00 a.m.YOW - ORD
1 stop14h 30mMultiple Airlines
Mon 12/112:44 p.m.ORD - YOW
1 stop27h 29mMultiple Airlines
Deal found 19/11C$ 438
Thu 25/1212:10 p.m.YOW - MDW
1 stop4h 10mPorter Airlines
Mon 29/1211:00 a.m.MDW - YOW
1 stop5h 29mPorter Airlines
Deal found 20/11C$ 541
Thu 8/15:40 a.m.YOW - ORD
2 stops11h 42mWestJet
Mon 12/15:20 p.m.ORD - YOW
2 stops30h 22mWestJet
Deal found 19/11C$ 592
Fri 10/44:20 p.m.YOW - ORD
3 stops25h 58mMultiple Airlines
Mon 13/47:05 a.m.ORD - YOW
1 stop9h 20mMultiple Airlines
Deal found 19/11C$ 454
Wed 21/18:55 p.m.YOW - MDW
1 stop14h 15mMultiple Airlines
Sun 25/15:01 p.m.MDW - YOW
2 stops23h 12mMultiple Airlines
Deal found 21/11C$ 476
Sat 13/128:40 a.m.YOW - MDW
1 stop4h 10mPorter Airlines
Sun 14/124:15 p.m.MDW - YOW
1 stop3h 39mPorter Airlines
Deal found 20/11C$ 551
Mon 8/124:15 p.m.YOW - ORD
2 stops22h 43mMultiple Airlines
Wed 10/125:00 a.m.ORD - YOW
1 stop11h 25mMultiple Airlines
Deal found 20/11C$ 479
Thu 25/1212:10 p.m.YOW - MDW
1 stop4h 10mPorter Airlines
Sun 28/124:15 p.m.MDW - YOW
1 stop3h 39mPorter Airlines
Deal found 21/11C$ 569
Thu 4/123:55 p.m.YOW - ORD
1 stop24h 02mMultiple Airlines
Mon 8/127:20 a.m.ORD - YOW
1 stop8h 53mMultiple Airlines
Deal found 19/11C$ 485
Sat 20/1212:10 p.m.YOW - MDW
1 stop4h 10mPorter Airlines
Fri 26/1211:00 a.m.MDW - YOW
1 stop5h 29mPorter Airlines
Deal found 21/11C$ 572
Tue 6/13:05 p.m.YOW - ORD
2 stops18h 26mMultiple Airlines
Sat 10/18:27 p.m.ORD - YOW
1 stop26h 31mMultiple Airlines
Deal found 21/11C$ 492
Sat 20/1212:10 p.m.YOW - MDW
1 stop4h 10mPorter Airlines
Mon 29/124:15 p.m.MDW - YOW
1 stop5h 14mPorter Airlines
Deal found 20/11C$ 574
Thu 8/17:00 a.m.YOW - MDW
1 stop4h 10mMultiple Airlines
Mon 12/14:31 p.m.MDW - YOW
1 stop23h 42mMultiple Airlines
Deal found 20/11C$ 502
Wed 21/17:00 a.m.YOW - ORD
1 stop17h 46mMultiple Airlines
Sun 25/13:25 p.m.ORD - YOW
3 stops32h 17mMultiple Airlines
Deal found 21/11C$ 533
Thu 4/129:30 a.m.YOW - MDW
1 stop13h 28mMultiple Airlines
Mon 8/128:42 p.m.MDW - YOW
2 stops19h 43mMultiple Airlines
Deal found 19/11C$ 553
Fri 5/129:30 a.m.YOW - MDW
1 stop14h 09mMultiple Airlines
Mon 8/128:42 p.m.MDW - YOW
2 stops19h 43mMultiple Airlines
Deal found 20/11C$ 554
Mon 8/129:30 a.m.YOW - MDW
1 stop13h 28mMultiple Airlines
Wed 10/122:49 p.m.MDW - YOW
2 stops20h 46mMultiple Airlines
Deal found 20/11C$ 574
Wed 21/14:15 p.m.YOW - ORD
2 stops23h 04mMultiple Airlines
Sat 24/14:38 p.m.ORD - YOW
3 stops30h 47mMultiple Airlines
Deal found 19/11C$ 609
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 22 November 2025.
Thu 8/15:11 p.m.YOW - ORD
Nonstop2h 44mUnited Airlines
Mon 12/16:00 p.m.ORD - YOW
Nonstop2h 18mUnited Airlines
Deal found 20/11C$ 734
Wed 4/25:11 p.m.YOW - ORD
Nonstop2h 44mUnited Airlines
Thu 5/21:55 p.m.ORD - YOW
Nonstop2h 17mUnited Airlines
Deal found 20/11C$ 740
Thu 25/125:09 p.m.YOW - ORD
Nonstop2h 44mUnited Airlines
Sun 28/126:00 p.m.ORD - YOW
Nonstop2h 18mUnited Airlines
Deal found 21/11C$ 741
Thu 25/125:09 p.m.YOW - ORD
Nonstop2h 44mUnited Airlines
Thu 1/16:00 p.m.ORD - YOW
Nonstop2h 18mUnited Airlines
Deal found 20/11C$ 743
Mon 19/16:20 a.m.YOW - ORD
Nonstop2h 45mAir Canada
Fri 23/11:55 p.m.ORD - YOW
Nonstop2h 17mAir Canada
Deal found 20/11C$ 813
Sat 20/125:09 p.m.YOW - ORD
Nonstop2h 44mUnited Airlines
Fri 26/126:00 p.m.ORD - YOW
Nonstop2h 18mUnited Airlines
Deal found 20/11C$ 822
Fri 12/125:14 p.m.YOW - ORD
Nonstop2h 41mUnited Airlines
Mon 15/126:05 p.m.ORD - YOW
Nonstop2h 13mUnited Airlines
Deal found 20/11C$ 827
Sat 20/125:09 p.m.YOW - ORD
Nonstop2h 44mUnited Airlines
Sat 27/126:00 p.m.ORD - YOW
Nonstop2h 18mUnited Airlines
Deal found 20/11C$ 892
Fri 9/15:11 p.m.YOW - ORD
Nonstop2h 44mAir Canada
Sat 10/11:55 p.m.ORD - YOW
Nonstop2h 17mAir Canada
Deal found 19/11C$ 1,078
Sat 20/125:09 p.m.YOW - ORD
Nonstop2h 44mAir Canada
Fri 26/126:00 p.m.ORD - YOW
Nonstop2h 18mAir Canada
Deal found 21/11C$ 1,129
Sun 15/36:20 a.m.YOW - ORD
Nonstop2h 41mAir Canada
Sat 21/32:00 p.m.ORD - YOW
Nonstop2h 12mAir Canada
Deal found 21/11C$ 1,153
Thu 11/1211:10 a.m.YOW - ORD
Nonstop2h 41mAir Canada
Mon 15/127:20 a.m.ORD - YOW
Nonstop2h 06mAir Canada
Deal found 21/11C$ 1,171
Last-minute flights from Ottawa to Chicago
Discover last-minute flight deals from Ottawa to Chicago. Data last updated 22 November 2025 and is based on user searches.
Thu 4/129:30 a.m.YOW - ORD
3 stops26h 38mMultiple Airlines
Mon 8/125:00 a.m.ORD - YOW
1 stop18h 25mMultiple Airlines
Deal found 19/11C$ 479
Thu 4/129:30 a.m.YOW - MDW
1 stop13h 28mMultiple Airlines
Sun 7/126:37 p.m.MDW - YOW
1 stop21h 36mMultiple Airlines
Deal found 20/11C$ 512
Fri 5/124:20 p.m.YOW - ORD
1 stop23h 01mMultiple Airlines
Mon 8/127:20 a.m.ORD - YOW
1 stop8h 53mMultiple Airlines
Deal found 20/11C$ 474
Mon 8/124:15 p.m.YOW - ORD
1 stop19h 53mMultiple Airlines
Wed 10/125:00 a.m.ORD - YOW
1 stop11h 25mMultiple Airlines
Deal found 20/11C$ 436
Mon 8/124:15 p.m.YOW - ORD
1 stop19h 53mMultiple Airlines
Fri 12/121:34 p.m.ORD - YOW
2 stops33h 51mMultiple Airlines
Deal found 20/11C$ 496
Mon 8/129:30 a.m.YOW - MDW
1 stop13h 28mMultiple Airlines
Fri 12/123:52 p.m.MDW - YOW
1 stop24h 21mMultiple Airlines
Deal found 20/11C$ 523
Fri 12/129:30 a.m.YOW - MDW
1 stop14h 09mMultiple Airlines
Mon 15/123:10 p.m.MDW - YOW
1 stop25h 03mMultiple Airlines
Deal found 20/11C$ 471
Fri 12/124:15 p.m.YOW - ORD
1 stop8h 54mMultiple Airlines
Mon 15/123:26 p.m.ORD - YOW
1 stop24h 59mMultiple Airlines
Deal found 20/11C$ 475
Sat 13/129:35 a.m.YOW - ORD
2 stops15h 34mMultiple Airlines
Mon 15/123:26 p.m.ORD - YOW
1 stop24h 59mMultiple Airlines
Deal found 20/11C$ 459
Sat 13/128:40 a.m.YOW - MDW
1 stop4h 10mPorter Airlines
Mon 15/124:15 p.m.MDW - YOW
1 stop3h 39mPorter Airlines
Deal found 20/11C$ 530
Thu 25/1212:10 p.m.YOW - MDW
1 stop4h 10mPorter Airlines
Mon 29/1211:00 a.m.MDW - YOW
1 stop5h 29mPorter Airlines
Deal found 20/11C$ 541
Thu 25/1212:10 p.m.YOW - MDW
1 stop4h 10mPorter Airlines
Thu 1/14:15 p.m.MDW - YOW
1 stop5h 14mPorter Airlines
Deal found 20/11C$ 543
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 22 November 2025.
Fri 9/14:20 p.m.YOW - ORD
3 stops32h 26mMultiple Airlines
Deal found 21/11C$ 141
Wed 7/14:15 p.m.YOW - ORD
1 stop29h 15mMultiple Airlines
Deal found 20/11C$ 214
Sat 6/124:20 p.m.YOW - ORD
3 stops32h 49mMultiple Airlines
Deal found 21/11C$ 244
Thu 11/129:35 a.m.YOW - ORD
1 stop13h 16mMultiple Airlines
Deal found 19/11C$ 248
Fri 12/123:55 p.m.YOW - ORD
1 stop24h 02mMultiple Airlines
Deal found 19/11C$ 254
Tue 6/13:05 p.m.YOW - ORD
2 stops24h 52mMultiple Airlines
Deal found 20/11C$ 272
Wed 10/129:30 a.m.YOW - ORD
1 stop29h 51mMultiple Airlines
Deal found 20/11C$ 275
Wed 31/124:15 p.m.YOW - ORD
2 stops31h 09mMultiple Airlines
Deal found 19/11C$ 276
Fri 5/129:30 a.m.YOW - MDW
1 stop14h 09mMultiple Airlines
Deal found 20/11C$ 282
Wed 10/129:30 a.m.YOW - MDW
2 stops33h 38mMultiple Airlines
Deal found 20/11C$ 293
Wed 31/126:50 a.m.YOW - MDW
1 stop4h 15mPorter Airlines
Deal found 19/11C$ 299
Tue 6/17:00 a.m.YOW - MDW
1 stop4h 10mPorter Airlines
Deal found 20/11C$ 300
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 22 November 2025.
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 8/1
7:00 a.m.-8:30 p.m.
1 stop14h 30m
Chicago O'Hare Intl
Mon 12/1
12:44 p.m.-5:13 p.m.
1 stop27h 29m
C$ 438
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Fri 10/4
4:20 p.m.-5:18 p.m.
3 stops25h 58m
Chicago O'Hare Intl
Mon 13/4
7:05 a.m.-5:25 p.m.
1 stop9h 20m
C$ 454
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Wed 21/1
8:55 p.m.-10:10 a.m.
1 stop14h 15m
Chicago Midway
Sun 25/1
5:01 p.m.-5:13 p.m.
2 stops23h 12m
C$ 476
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Mon 8/12
4:15 p.m.-1:58 p.m.
2 stops22h 43m
Chicago O'Hare Intl
Wed 10/12
5:00 a.m.-5:25 p.m.
1 stop11h 25m
C$ 479
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Thu 4/12
3:55 p.m.-2:57 p.m.
1 stop24h 02m
Chicago O'Hare Intl
Mon 8/12
7:20 a.m.-5:13 p.m.
1 stop8h 53m
C$ 485
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Tue 6/1
3:05 p.m.-8:31 a.m.
2 stops18h 26m
Chicago O'Hare Intl
Sat 10/1
8:27 p.m.-11:58 p.m.
1 stop26h 31m
C$ 492
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Thu 8/1
7:00 a.m.-10:10 a.m.
1 stop4h 10m
Chicago Midway
Mon 12/1
4:31 p.m.-5:13 p.m.
1 stop23h 42m
C$ 502
OttawaChicago
YOW - ORD
YOWORD
Ottawa
Wed 21/1
7:00 a.m.-11:46 p.m.
1 stop17h 46m
Chicago O'Hare Intl
Sun 25/1
3:25 p.m.-12:42 a.m.
3 stops32h 17m
C$ 533
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Thu 25/12
12:10 p.m.-3:20 p.m.
1 stop4h 10m
Chicago Midway
Mon 29/12
11:00 a.m.-5:29 p.m.
1 stop5h 29m
C$ 541
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Sat 13/12
8:40 a.m.-11:50 a.m.
1 stop4h 10m
Chicago Midway
Sun 14/12
4:15 p.m.-8:54 p.m.
1 stop3h 39m
C$ 551
Flights are sorted by cheapest round-trip flights first.
Deals found on 21/11
Showing 1-10 of 38 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 14 November 2025.
Booking 22 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$ 185). Flying from Ottawa to Chicago in March is currently the most expensive (average of C$ 361). 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 22 November 2025.
Unlike in the morning, when flights are generally more expensive, you can save up to 52% on flights from Ottawa to Chicago by exploring options for tickets at noon.
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 22 November 2025.
The most flights from YOW to CHI 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 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 91% 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$ 454.
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 22 November 2025.
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 12 outbound flights to Chicago per day.
How long is the flight from Ottawa to Chicago?
Departing from Ottawa to Chicago will take you 4h 10m. There are 1048 km between Ottawa and Chicago.
What are the cheapest airlines flying from Ottawa to Chicago round-trip?
Currently priced at C$ 378, 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$ 474 and C$ 501, respectively. You may be able to fly from Ottawa to Chicago for 34% 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 ANA (90%), GoJet (88%) and Avianca (87%).
What are the cheapest flights from Ottawa to Chicago?
Looking at all options, your cheapest flight can be booked for C$ 250. While the most popular route (Ottawa - Chicago O'Hare Intl) can be booked for C$ 379 on average, our data indicates C$ 1,232 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$ 185). Flying from Ottawa to Chicago in March is currently the most expensive (average of C$ 361). 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 22 November 2025.
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 22 November 2025.
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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