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Cheap flights from Ottawa to Chicago O'Hare Intl Airport from C$ 283

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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
22 Aug — 29 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ottawa to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to O'Hare Intl
Explore the most affordable flight options available from Ottawa to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 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$ 507
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$ 535
Sat 12/96:55 a.m.
YOW
-
ORD
1 stop14h 46m
Multiple Airlines
Sun 13/95:35 p.m.
ORD
-
YOW
1 stop5h 45m
Multiple Airlines
Deal found 23/7C$ 567
Fri 11/96:55 a.m.
YOW
-
ORD
2 stops14h 17m
Multiple Airlines
Sun 13/93:45 p.m.
ORD
-
YOW
1 stop7h 35m
Multiple Airlines
Deal found 23/7C$ 576
Fri 11/98:40 a.m.
YOW
-
ORD
1 stop6h 40m
American Airlines
Sun 13/98:03 a.m.
ORD
-
YOW
1 stop5h 52m
American Airlines
Deal found 21/7C$ 587
Wed 23/97:00 a.m.
YOW
-
ORD
1 stop6h 45m
American Airlines
Sun 27/98:03 a.m.
ORD
-
YOW
1 stop5h 52m
American Airlines
Deal found 21/7C$ 590
Tue 18/87:00 a.m.
YOW
-
ORD
2 stops30h 50m
Multiple Airlines
Tue 25/85:30 p.m.
ORD
-
YOW
1 stop11h 05m
Multiple Airlines
Deal found 19/7C$ 598

Find flight deals from Ottawa to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to O'Hare Intl (ORD). 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 23 July 2026.

Round-trip from

C$ 507

One-way from

C$ 283

Popular in

March

Cheapest in

October

Average price

C$ 940

Good round-trip deal

C$ 796 or less

Good one-way deal

C$ 407 or less
25/9-29/9
  • 25/9-29/9
  • 2 total stops
  • 16h 33m total
  • Ottawa to Chicago
Search Deals
25/8
  • 25/8
  • 2 total stops
  • 30h 50m total
  • Ottawa to Chicago
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 305 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 47 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 O'Hare Intl.
Search Deals
Price to beat on a one-way flight from Ottawa to Chicago O'Hare Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to O'Hare Intl 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 23 July 2026.
Use the filters below to find and compare flights from Ottawa to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 25/10

7:00 a.m.-12:45 p.m.

1 stop6h 45m

Chicago O'Hare Intl

Wed 28/10

2:50 p.m.-10:08 p.m.

1 stop6h 18m

C$ 669

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 28/10

7:00 a.m.-6:34 p.m.

2 stops12h 34m

Chicago O'Hare Intl

Sat 31/10

2:50 p.m.-10:08 p.m.

1 stop6h 18m

C$ 787

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 24/10

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

1 stop6h 40m

Chicago O'Hare Intl

Wed 28/10

11:45 a.m.-6:14 p.m.

1 stop5h 29m

C$ 800

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 20/10

6:05 a.m.-4:34 p.m.

1 stop11h 29m

Chicago O'Hare Intl

Fri 23/10

9:35 p.m.-4:38 p.m.

1 stop18h 03m

C$ 854

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 20/8

6:05 a.m.-3:16 p.m.

2 stops10h 11m

Chicago O'Hare Intl

Thu 27/8

6:00 a.m.-4:38 p.m.

1 stop9h 38m

C$ 874

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 6/10

9:55 a.m.-1:19 p.m.

1 stop4h 24m

Chicago O'Hare Intl

Thu 8/10

6:21 p.m.-9:35 p.m.

Nonstop2h 14m

C$ 881

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 10/8

7:00 a.m.-4:19 p.m.

1 stop10h 19m

Chicago O'Hare Intl

Wed 12/8

8:32 p.m.-2:55 p.m.

1 stop17h 23m

C$ 885

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 22/9

10:40 a.m.-7:01 p.m.

2 stops9h 21m

Chicago O'Hare Intl

Fri 25/9

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

1 stop11h 05m

C$ 925

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 7/9

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

Nonstop2h 19m

Chicago O'Hare Intl

Thu 10/9

6:21 p.m.-9:35 p.m.

Nonstop2h 14m

C$ 947
Quickest round-trip

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 24/10

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

Nonstop2h 19m

Chicago O'Hare Intl

Wed 28/10

10:57 a.m.-2:09 p.m.

Nonstop2h 12m

C$ 949

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/7

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Ottawa to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl 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 O'Hare Intl Airport

What is the cheapest month to book a flight from Ottawa to Chicago O'Hare Intl Airport?

Currently, October is the cheapest month in which you can book a flight from Ottawa to Chicago O'Hare Intl Airport (average of C$ 487). Flying from Ottawa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 1,246). 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 ORD?

Find hourly flight availability from Ottawa to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 July 2026.

When flying from Ottawa to Chicago O'Hare Intl Airport, 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 O'Hare Intl Airport?

Airfare is below average for this route at the moment.

Ottawa to Chicago O'Hare Intl Airport flights typically cost between C$ 743 and C$ 1,092 in September.
The cheapest round-trip price found within the last 5 days was C$ 507 on Multiple Airlines (25 Sep-29 Sep).

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated 23 July 2026.
Read through reviews of airlines operating flights from Ottawa to Chicago O'Hare Intl Airport, such as United Airlines and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,026 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
10,026 reviews
United Airlines
7.4
Good
10,026 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Air Canada
7.1
Good
11,373 reviews
United Airlines
7.4
Good
10,026 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to O'Hare Intl. 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 O'Hare Intl?

    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 O'Hare Intl. 2 airlines have flights from Ottawa to Chicago O'Hare Intl on a regular basis. Booking flights from Ottawa to Chicago O'Hare Intl should not be difficult; the airport handles an average of 11 outbound flights to Chicago O'Hare Intl per day.

  • How long is the flight from Ottawa to Chicago O'Hare Intl Airport?

    Airlines like American Airlines, Porter Airlines, and United Airlines fly from Ottawa to Chicago O'Hare Intl Airport in about 6h 40m. The time it takes to get you to your destination can typically vary by up to 4h 49m. Airlines will cover a distance of 1051 km. 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 O'Hare Intl Airport round-trip?

    Our cheapest airline available from Ottawa to Chicago O'Hare Intl Airport is Air Canada. Our recent data shows that you can find tickets from as low as C$ 422 on this airline. An additional option worth looking into is United Airlines, starting at C$ 480. Air Canada is 52% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most reliable airlines from Ottawa to Chicago O'Hare Intl Airport?

    Before booking your flight to Chicago O'Hare Intl Airport from Ottawa, check out the most reliable airlines to get you to your destination on time: Republic Airways (87%), United Airlines (86%), ANA( 86%).

  • What are the cheapest flights from Ottawa to Chicago O'Hare Intl Airport?

    Looking for the cheapest flight from Ottawa to Chicago O'Hare Intl Airport? While on average our users pay C$ 1,512, our data indicates the cheapest price to be C$ 328. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 632.

  • Can I find deals for flights from Ottawa to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Ottawa to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to O'Hare Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to O'Hare Intl.

  • Can I find deals for business class flights from Ottawa to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Ottawa to O'Hare Intl 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 O'Hare Intl Airport?

    Currently, October is the cheapest month in which you can book a flight from Ottawa to Chicago O'Hare Intl Airport (average of C$ 487). Flying from Ottawa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 1,246). 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

Travelling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Northbrook
Evanston
Des Plaines
Downers Grove
Elk Grove Village
Racine
Bolingbrook
Naperville
Schaumburg

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Ottawa to O'Hare Intl

Discover the top 2 airlines that operate flights from Ottawa to O'Hare Intl. 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 23 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 422AverageC$ 998FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 480AverageC$ 656FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ottawa to O'Hare Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ottawa to O'Hare Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to O'Hare Intl?

Millions of users choose and trust Cheapflights to book the best flight deals from Ottawa to O'Hare Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ottawa to O'Hare Intl with no change fees?

Yes! Cheapflights helps users easily find flights from Ottawa to O'Hare Intl with no change fees.

Can Cheapflights notify me if prices for flights from Ottawa to O'Hare Intl become cheaper?

Not ready to book yet? You can track prices for flights from Ottawa to O'Hare Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

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