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Cheap flights from Ottawa to Chicago O'Hare Intl Airport from C$ 146

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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
11 Jan — 18 Jan1
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 12 December 2025.

Tue 23/128:55 p.m.YOW - ORD
2 stops36h 36mMultiple Airlines
Wed 7/17:30 a.m.ORD - YOW
1 stop15h 55mMultiple Airlines
Deal found 10/12C$ 749
Fri 12/127:00 a.m.YOW - ORD
1 stop18h 09mMultiple Airlines
Sun 14/129:14 p.m.ORD - YOW
2 stops26h 11mMultiple Airlines
Deal found 11/12C$ 765
Mon 29/129:10 a.m.YOW - ORD
2 stops14h 10mAmerican Airlines
Tue 30/129:45 a.m.ORD - YOW
1 stop6h 06mAmerican Airlines
Deal found 10/12C$ 787
Mon 15/129:35 a.m.YOW - ORD
2 stops30h 37mMultiple Airlines
Mon 22/125:00 a.m.ORD - YOW
1 stop18h 25mMultiple Airlines
Deal found 10/12C$ 815
Thu 25/121:20 p.m.YOW - ORD
2 stops20h 11mMultiple Airlines
Sun 28/127:57 p.m.ORD - YOW
2 stops27h 28mMultiple Airlines
Deal found 11/12C$ 888
Fri 26/123:55 p.m.YOW - ORD
1 stop17h 36mMultiple Airlines
Sun 28/127:57 p.m.ORD - YOW
2 stops27h 28mMultiple Airlines
Deal found 10/12C$ 906

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 12 December 2025.

Round-trip from

C$ 334

One-way from

C$ 146

Popular in

January

Cheapest in

September

Average price

C$ 720

Good round-trip deal

C$ 524 or less

Good one-way deal

C$ 280 or less
25/1-1/2
  • 25/1-1/2
  • 4 total stops
  • 39h 57m total
  • Ottawa to Chicago
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11/1
  • 11/1
  • 3 total stops
  • 29h 43m total
  • Ottawa to Chicago
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 229 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 12 December 2025.
Use the filters below to find and compare flights from Ottawa to Chicago O'Hare Intl Airport that are best for you.

Fly from

Ottawa

Fly to

O'Hare Intl

Route

Depart

Return

Price

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 25/1

4:20 p.m.-7:38 p.m.

3 stops28h 18m

Chicago O'Hare Intl

Sun 1/2

12:44 p.m.-11:58 p.m.

1 stop10h 14m

C$ 343

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 24/1

9:30 a.m.-5:52 p.m.

1 stop9h 22m

Chicago O'Hare Intl

Sat 31/1

5:15 a.m.-12:25 a.m.

1 stop18h 10m

C$ 440

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 2/1

6:50 a.m.-10:07 p.m.

2 stops16h 17m

Chicago O'Hare Intl

Sun 4/1

4:38 p.m.-12:40 p.m.

1 stop19h 02m

C$ 662

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 14/1

5:11 p.m.-6:55 p.m.

Nonstop2h 44m

Chicago O'Hare Intl

Wed 21/1

6:00 p.m.-9:18 p.m.

Nonstop2h 18m

C$ 728

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 26/1

5:11 p.m.-6:55 p.m.

Nonstop2h 44m

Chicago O'Hare Intl

Thu 29/1

9:02 a.m.-4:30 p.m.

1 stop6h 28m

C$ 734

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 11/1

4:20 p.m.-9:03 p.m.

3 stops29h 43m

C$ 146

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 10/1

9:40 a.m.-4:58 p.m.

1 stop8h 18m

C$ 239

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 23/1

9:15 a.m.-10:42 p.m.

2 stops14h 27m

C$ 250

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 11/1

5:45 p.m.-1:35 p.m.

1 stop20h 50m

C$ 283

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

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, January is the cheapest month in which you can book a flight from Ottawa to Chicago O'Hare Intl Airport (average of C$ 215). Flying from Ottawa to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 390). 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 12 December 2025.

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.

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 12 December 2025.
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
9,095 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

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
9,095 reviews
United Airlines
7.4
Good
9,095 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

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
10,516 reviews
United Airlines
7.4
Good
9,095 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

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 10 outbound flights to Chicago O'Hare Intl per day.

  • 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 United Airlines. Our recent data shows that you can find tickets from as low as C$ 463 on this airline. An additional option worth looking into is Air Canada, starting at C$ 490. United Airlines is 34% 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: SkyWest Airlines (100%), ANA (87%), Avianca( 85%).

  • 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$ 1,429, our data indicates the cheapest price to be C$ 226. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 379.

  • 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, January is the cheapest month in which you can book a flight from Ottawa to Chicago O'Hare Intl Airport (average of C$ 215). Flying from Ottawa to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 390). 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
Evanston
Des Plaines
Skokie
Elk Grove Village
Downers Grove
Racine
Naperville
Bolingbrook
Romeoville

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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 464AverageC$ 671FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 502AverageC$ 650FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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