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Cheap flights from Ottawa to Chicago from C$ 271

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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — CHI
18 Aug — 25 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ottawa to Chicago

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to Chicago
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 19 July 2026.

Fri 25/96:55 a.m.
YOW
-
ORD
1 stop7h 28m
Multiple Airlines
Tue 29/92:15 p.m.
ORD
-
YOW
1 stop9h 05m
Multiple Airlines
Deal found 19/7C$ 505
Sun 6/96:25 p.m.
YOW
-
MDW
1 stop17h 35m
Multiple Airlines
Mon 14/93:20 p.m.
MDW
-
YOW
1 stop15h 45m
Multiple Airlines
Deal found 18/7C$ 506
Fri 14/86:55 a.m.
YOW
-
MDW
1 stop8h 40m
Multiple Airlines
Sun 16/810:20 a.m.
MDW
-
YOW
1 stop13h 00m
Multiple Airlines
Deal found 15/7C$ 524
Thu 20/86:55 a.m.
YOW
-
MDW
1 stop8h 40m
Multiple Airlines
Sun 23/810:20 a.m.
MDW
-
YOW
1 stop13h 00m
Multiple Airlines
Deal found 17/7C$ 533
Wed 2/96:55 a.m.
YOW
-
ORD
1 stop11h 02m
Multiple Airlines
Wed 9/99:50 a.m.
ORD
-
YOW
1 stop13h 30m
Multiple Airlines
Deal found 19/7C$ 533
Tue 18/810:40 a.m.
YOW
-
MDW
1 stop4h 55m
Porter Airlines
Tue 25/83:15 p.m.
MDW
-
YOW
1 stop5h 29m
Porter Airlines
Deal found 19/7C$ 552
Sun 30/86:25 p.m.
YOW
-
ORD
2 stops43h 25m
Multiple Airlines
Sun 6/98:05 a.m.
ORD
-
YOW
1 stop30h 10m
Multiple Airlines
Deal found 16/7C$ 561
Sat 7/118:00 a.m.
YOW
-
ORD
1 stop16h 50m
Multiple Airlines
Tue 10/114:44 p.m.
ORD
-
YOW
1 stop23h 00m
Multiple Airlines
Deal found 17/7C$ 564
Thu 3/98:00 a.m.
YOW
-
MDW
1 stop4h 00m
Porter Airlines
Mon 7/93:20 p.m.
MDW
-
YOW
1 stop5h 22m
Porter Airlines
Deal found 17/7C$ 565
Wed 26/88:00 a.m.
YOW
-
MDW
1 stop7h 35m
Porter Airlines
Fri 4/911:45 a.m.
MDW
-
YOW
1 stop8h 57m
Porter Airlines
Deal found 18/7C$ 566
Mon 10/86:25 p.m.
YOW
-
MDW
1 stop16h 20m
Multiple Airlines
Fri 14/83:15 p.m.
MDW
-
YOW
1 stop8h 05m
Multiple Airlines
Deal found 18/7C$ 573
Fri 21/810:40 a.m.
YOW
-
MDW
1 stop4h 55m
Porter Airlines
Sun 23/810:20 a.m.
MDW
-
YOW
1 stop6h 34m
Porter Airlines
Deal found 19/7C$ 575

Find 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 19 July 2026.

Round-trip from

C$ 506

One-way from

C$ 271

Popular in

January

Cheapest in

February

Average price

C$ 858

Good round-trip deal

C$ 793 or less

Good one-way deal

C$ 405 or less
Porter Airlines
  • Porter Airlines
  • 6/9-14/9
  • 2 total stops
  • 33h 20m total
  • Ottawa to Chicago
Search Deals
28/9
  • 28/9
  • 1 total stop
  • 8h 40m total
  • Ottawa to Chicago
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 61 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Ottawa to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from Ottawa to Chicago (CHI).
Search Deals

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 19 July 2026.
Use the filters below to find and compare flights from Ottawa to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 18/8

10:40 a.m.-2:35 p.m.

1 stop4h 55m

Chicago Midway

Tue 25/8

3:15 p.m.-9:44 p.m.

1 stop5h 29m

C$ 552

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 20/8

6:55 a.m.-2:35 p.m.

1 stop8h 40m

Chicago Midway

Sun 23/8

3:15 p.m.-12:20 a.m.

1 stop8h 05m

C$ 569

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 11/8

10:40 a.m.-2:35 p.m.

1 stop4h 55m

Chicago Midway

Thu 13/8

10:25 a.m.-5:54 p.m.

1 stop6h 29m

C$ 624

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 1/9

10:40 a.m.-2:35 p.m.

1 stop4h 55m

Chicago Midway

Sat 12/9

11:45 a.m.-7:07 p.m.

1 stop6h 22m

C$ 669

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 20/8

10:40 a.m.-2:35 p.m.

1 stop4h 55m

Chicago Midway

Fri 21/8

3:15 p.m.-8:04 p.m.

1 stop3h 49m

C$ 671

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Wed 29/7

10:40 a.m.-2:35 p.m.

1 stop4h 55m

Chicago Midway

Sun 2/8

10:20 a.m.-8:04 p.m.

1 stop8h 44m

C$ 712

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 20/8

10:40 a.m.-2:35 p.m.

1 stop4h 55m

Chicago Midway

Sat 22/8

10:20 a.m.-7:14 p.m.

1 stop7h 54m

C$ 721

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Wed 19/8

10:40 a.m.-2:35 p.m.

1 stop4h 55m

Chicago Midway

Sat 22/8

10:20 a.m.-7:14 p.m.

1 stop7h 54m

C$ 721

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 21/8

10:40 a.m.-2:35 p.m.

1 stop4h 55m

Chicago Midway

Sat 22/8

10:20 a.m.-7:14 p.m.

1 stop7h 54m

C$ 721

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 10/9

8:15 p.m.-10:58 a.m.

2 stops15h 43m

Chicago Midway

Mon 14/9

11:45 a.m.-5:52 p.m.

1 stop5h 07m

C$ 763

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/7

Showing 1-10 of 40 resultsSorted by cheapest first
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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

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$ 528). Flying from Ottawa to Chicago in January is currently the most expensive (average of C$ 1,130). 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 19 July 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 19 July 2026.

The most flights from YOW to CHI are scheduled on a Friday (12 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 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 92% 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.

Toronto (YTZ) is the most affordable 1-stop option, with an average round-trip price of C$ 430.

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 (YTZ) have the shortest average one-way travel time for 1-stop routes: 4h 00m.

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 (YTZ) offer the fastest connection on this route, with an average layover time of 1h 11m.

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 19 July 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.
Porter Airlines
8.0
Very good
445 reviews
Check prices

Overall

8.0

Food

7.5

Entertainment

6.9

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
445 reviews
Porter Airlines
8.0
Very good
445 reviews
Check prices

Overall

8.0

Food

7.5

Entertainment

6.9

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
United Airlines
7.4
Good
10,012 reviews
Porter Airlines
8.0
Very good
445 reviews
Check prices

Overall

8.0

Food

7.5

Entertainment

6.9

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,360 reviews
Porter Airlines
8.0
Very good
445 reviews
Check prices

Overall

8.0

Food

7.5

Entertainment

6.9

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

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 10 outbound flights to Chicago per day.

  • How long is the flight from Ottawa to Chicago?

    Departing from Ottawa to Chicago will take you 4h. There are 1048 km between Ottawa and Chicago. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Ottawa to Chicago round-trip?

    Currently priced at C$ 325, 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 Air Canada and United Airlines - these airlines can fly you to your destination from C$ 420 and C$ 478, respectively. You may be able to fly from Ottawa to Chicago for 54% 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 Republic Airways (87%), United Airlines (86%) and ANA (86%).

  • What are the cheapest flights from Ottawa to Chicago?

    Looking at all options, your cheapest flight can be booked for C$ 327. While the most popular route (Ottawa - Chicago O'Hare Intl) can be booked for C$ 564 on average, our data indicates C$ 1,506 when flying from Ottawa to Chicago.

  • Can I find deals for flights from Ottawa to Chicago that include hotel bookings?

    Yes. In addition to deals on Ottawa to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights 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$ 528). Flying from Ottawa to Chicago in January is currently the most expensive (average of C$ 1,130). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Ottawa to Chicago

Discover the top 2 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 19 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 420AverageC$ 927FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 472AverageC$ 579FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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