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Cheap flights from Ottawa to Chicago from C$ 291

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
9 Sep — 16 Sep1
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 10 August 2026.

Sat 5/95:57 p.m. -
1 stop6h 25m
Sun 6/910:40 a.m. -
Nonstop2h 19m
Deal found 6/8C$ 495
Fri 16/107:20 a.m. -
1 stop10h 20m
Mon 19/105:30 p.m. -
1 stop11h 05m
Deal found 10/8C$ 506
Thu 15/107:20 a.m. -
1 stop10h 20m
Mon 19/105:30 p.m. -
1 stop11h 05m
Deal found 9/8C$ 507
Thu 10/97:20 a.m. -
1 stop10h 20m
Sun 13/95:30 p.m. -
1 stop11h 05m
Deal found 10/8C$ 510
Sat 19/94:15 p.m. -
1 stop25h 25m
Tue 22/95:30 p.m. -
1 stop11h 05m
Deal found 9/8C$ 518
Sat 17/104:15 p.m. -
1 stop25h 25m
Mon 19/105:30 p.m. -
1 stop11h 05m
Deal found 9/8C$ 524
Thu 10/96:55 a.m. -
1 stop8h 40m
Sun 13/93:20 p.m. -
1 stop8h 00m
Deal found 7/8C$ 530
Sat 19/96:55 a.m. -
1 stop8h 40m
Tue 22/93:20 p.m. -
1 stop8h 00m
Deal found 9/8C$ 534
Thu 17/96:55 a.m. -
1 stop8h 40m
Sun 20/911:45 a.m. -
1 stop11h 35m
Deal found 9/8C$ 537
Thu 10/96:55 a.m. -
1 stop13h 53m
Sun 13/92:00 p.m. -
1 stop9h 20m
Deal found 7/8C$ 537
Tue 22/96:55 a.m. -
1 stop7h 28m
Tue 29/99:55 a.m. -
1 stop6h 40m
Deal found 7/8C$ 538
Mon 19/102:10 p.m. -
2 stops31h 15m
Mon 26/106:05 a.m. -
1 stop9h 39m
Deal found 7/8C$ 539

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 10 August 2026.

Round-trip from

C$ 495

One-way from

C$ 291

Popular in

January

Cheapest in

February

Average price

C$ 677

Good round-trip deal

C$ 752 or less

Good one-way deal

C$ 368 or less
Lufthansa
  • Lufthansa
  • 5/9-6/9
  • 1 total stop
  • 8h 44m total
  • Ottawa to Chicago
Search Deals
28/9
  • 28/9
  • 2 total stops
  • 31h 19m total
  • Ottawa to Chicago
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 59 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 10 August 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 Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Mon 21/9

2:10 p.m.-5:46 p.m.

2 stops28h 36m

Chicago Midway

Mon 28/9

11:45 a.m.-8:02 p.m.

1 stop7h 17m

C$ 583

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Sun 6/9

10:30 a.m.-2:35 p.m.

1 stop5h 05m

Chicago Midway

Sun 13/9

3:20 p.m.-8:02 p.m.

1 stop3h 42m

C$ 585

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Thu 17/9

8:00 a.m.-11:00 a.m.

1 stop4h 00m

Chicago Midway

Sun 20/9

11:45 a.m.-8:02 p.m.

1 stop7h 17m

C$ 648

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Sat 17/10

8:40 a.m.-2:20 p.m.

1 stop6h 40m

Chicago O'Hare Intl

Sun 18/10

8:06 a.m.-2:55 p.m.

1 stop5h 49m

C$ 746

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Tue 20/10

6:50 a.m.-4:32 p.m.

2 stops10h 42m

Chicago O'Hare Intl

Fri 23/10

5:30 p.m.-5:35 a.m.

1 stop11h 05m

C$ 768

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Sat 19/9

6:25 p.m.-9:07 a.m.

2 stops15h 42m

Chicago Midway

Mon 21/9

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

1 stop5h 07m

C$ 768

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Tue 22/9

10:00 a.m.-2:20 p.m.

1 stop5h 20m

Chicago O'Hare Intl

Sat 26/9

8:03 a.m.-12:25 a.m.

1 stop15h 22m

C$ 772

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Tue 13/10

4:00 p.m.-2:20 p.m.

1 stop23h 20m

Chicago O'Hare Intl

Mon 19/10

8:06 a.m.-2:55 p.m.

1 stop5h 49m

C$ 796

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Sat 19/9

6:25 a.m.-7:44 a.m.

Nonstop2h 19m

Chicago O'Hare Intl

Sat 19/9

2:00 p.m.-7:52 p.m.

1 stop4h 52m

C$ 815

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Thu 22/10

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

1 stop4h 55m

Chicago Midway

Sat 24/10

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

1 stop6h 22m

C$ 819

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/8

Showing 1-10 of 38 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$ 542). Flying from Ottawa to Chicago in January is currently the most expensive (average of C$ 1,123). 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 10 August 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.

How much does it cost to fly round-trip from Ottawa to Chicago?

Airfare is typical for this route at the moment.
Ottawa to Chicago flights typically cost between C$ 486 and C$ 939 in September.
The cheapest round-trip price found within the last 5 days was C$ 495 on Lufthansa (5 Sep-6 Sep).

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 89% 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$ 428.

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 10 August 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
454 reviews
Check prices

Crew

8.6

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
Porter Airlines
8.0
Very good
454 reviews
Porter Airlines
8.0
Very good
454 reviews
Check prices

Crew

8.6

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
United Airlines
7.4
Good
10,101 reviews
Porter Airlines
8.0
Very good
454 reviews
Check prices

Crew

8.6

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
Air Canada
7.1
Good
11,460 reviews
Porter Airlines
8.0
Very good
454 reviews
Check prices

Crew

8.6

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.

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. 2 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 6 outbound flights to Chicago per day.

  • How long is the flight from Ottawa to Chicago?

    Departing from Ottawa to Chicago will take you 6h 40m. There are 1051 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$ 418, Air Canada will fly you from Ottawa to Chicago and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as C$ 476. You may be able to fly from Ottawa to Chicago for 41% 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 Avianca (87%), ANA (85%) and Air Canada (75%).

  • What are the cheapest flights from Ottawa to Chicago?

    Looking at all options, your cheapest flight can be booked for C$ 287. While the most popular route (Ottawa - Chicago O'Hare Intl) can be booked for C$ 570 on average, our data indicates C$ 1,366 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$ 542). Flying from Ottawa to Chicago in January is currently the most expensive (average of C$ 1,123). 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 10 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 418AverageC$ 1,126FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 476AverageC$ 767FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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