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Cheap flights from Ottawa to Chicago O'Hare Intl Airport from C$ 200

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Ottawa to Chicago O'Hare Intl are usually found in June or July, booked 70 days in advance, depart on a Friday or Saturday and return on a Wednesday

Cheap 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 11 September 2025.

Round-trip from

C$ 453

One-way from

C$ 200

Popular in

March

Cheapest in

June

Average price

C$ 635

Good round-trip deal

C$ 615 or less

Good one-way deal

C$ 321 or less
United Airlines
  • United Airlines
  • 25/9-29/9
  • Nonstop
  • 4h 41m total
  • Ottawa to Chicago
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WestJet
  • WestJet
  • 18/10
  • 1 total stop
  • 11h 43m total
  • Ottawa to Chicago
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Highest demand for flights based on searches. 12% potential increase in price (C$ 136 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 33 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Ottawa to Chicago O'Hare Intl.
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Price to beat on a one-way flight from Ottawa to Chicago O'Hare Intl.
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Find flight deals from Ottawa to O'Hare Intl

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 11 September 2025.

Thu 25/96:33 a.m.YOW - ORD
Nonstop2h 27mUnited Airlines
Mon 29/910:50 a.m.ORD - YOW
Nonstop2h 14mUnited Airlines
Deal found 10/9C$ 453
Sun 19/103:50 p.m.YOW - ORD
1 stop20h 00mMultiple Airlines
Mon 27/108:15 a.m.ORD - YOW
2 stops15h 27mMultiple Airlines
Deal found 9/9C$ 459
Thu 25/96:33 a.m.YOW - ORD
Nonstop2h 27mUnited Airlines
Wed 8/108:50 a.m.ORD - YOW
1 stop4h 23mUnited Airlines
Deal found 10/9C$ 460
Sat 27/95:25 p.m.YOW - ORD
Nonstop2h 29mLufthansa
Mon 29/910:50 a.m.ORD - YOW
Nonstop2h 14mLufthansa
Deal found 11/9C$ 470
Sat 27/95:25 p.m.YOW - ORD
Nonstop2h 29mMultiple Airlines
Mon 29/910:40 a.m.ORD - YOW
1 stop5h 39mMultiple Airlines
Deal found 11/9C$ 473
Wed 24/95:25 p.m.YOW - ORD
Nonstop2h 29mUnited Airlines
Sat 27/910:45 a.m.ORD - YOW
1 stop7h 07mUnited Airlines
Deal found 10/9C$ 474
Sat 4/1010:45 a.m.YOW - ORD
2 stops12h 26mMultiple Airlines
Tue 7/106:58 p.m.ORD - YOW
1 stop20h 59mMultiple Airlines
Deal found 11/9C$ 477
Sat 27/98:35 a.m.YOW - ORD
1 stop5h 39mAir Canada
Mon 29/98:25 p.m.ORD - YOW
1 stop4h 09mAir Canada
Deal found 10/9C$ 478
Fri 26/95:50 p.m.YOW - ORD
1 stop6h 40mUnited Airlines
Tue 30/96:06 p.m.ORD - YOW
Nonstop2h 29mUnited Airlines
Deal found 11/9C$ 479
Tue 7/103:50 p.m.YOW - ORD
1 stop8h 55mMultiple Airlines
Thu 9/101:26 p.m.ORD - YOW
2 stops9h 56mMultiple Airlines
Deal found 11/9C$ 484

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 11 September 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

Thu 25/9

6:33 a.m.-8:00 a.m.

Nonstop2h 27m

Chicago O'Hare Intl

Mon 29/9

10:50 a.m.-2:04 p.m.

Nonstop2h 14m

C$ 453

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 25/9

6:33 a.m.-8:00 a.m.

Nonstop2h 27m

Chicago O'Hare Intl

Wed 8/10

8:50 a.m.-2:13 p.m.

1 stop4h 23m

C$ 460

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 3/10

6:33 a.m.-8:00 a.m.

Nonstop2h 27m

Chicago O'Hare Intl

Sun 5/10

9:20 p.m.-9:58 a.m.

1 stop11h 38m

C$ 473

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 4/10

5:25 p.m.-6:54 p.m.

Nonstop2h 29m

Chicago O'Hare Intl

Tue 7/10

9:20 p.m.-9:58 a.m.

1 stop11h 38m

C$ 473

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 7/10

6:33 a.m.-8:00 a.m.

Nonstop2h 27m

Chicago O'Hare Intl

Thu 9/10

6:00 a.m.-11:45 a.m.

1 stop4h 45m

C$ 473

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 24/9

6:33 a.m.-8:00 a.m.

Nonstop2h 27m

Chicago O'Hare Intl

Sat 27/9

10:45 a.m.-6:52 p.m.

1 stop7h 07m

C$ 474

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 3/10

6:33 a.m.-8:00 a.m.

Nonstop2h 27m

Chicago O'Hare Intl

Mon 6/10

9:20 p.m.-9:58 a.m.

1 stop11h 38m

C$ 474

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 25/9

8:35 a.m.-1:13 p.m.

1 stop5h 38m

Chicago O'Hare Intl

Wed 8/10

9:55 a.m.-5:04 p.m.

1 stop6h 09m

C$ 479

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 26/9

5:50 p.m.-11:30 p.m.

1 stop6h 40m

Chicago O'Hare Intl

Tue 30/9

6:06 p.m.-9:35 p.m.

Nonstop2h 29m

C$ 479

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 15/10

4:25 p.m.-4:57 p.m.

1 stop25h 32m

C$ 227

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 17 results
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

How far ahead should I book a flight from Ottawa to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to O'Hare Intl. Price data was last updated on 29 August 2025.

The best time to book flights from Ottawa to Chicago O'Hare Intl Airport is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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$ 261). Flying from Ottawa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 349). 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 11 September 2025.

One of the essential ways to save on airfare from Ottawa to Chicago O'Hare Intl Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 17% on airfare.

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 11 September 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
8,937 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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 United Airlines fly from Ottawa to Chicago O'Hare Intl Airport in about 2h 27m. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 1051 km. Most flights are nonstop.

  • 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$ 466 on this airline. An additional option worth looking into is Air Canada, starting at C$ 505. United Airlines is 33% 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: Avianca (89%), ANA (84%), GoJet( 80%).

  • 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$ 1,449, our data indicates the cheapest price to be C$ 266. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 406.

  • 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$ 261). Flying from Ottawa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 349). 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
Elk Grove Village
Skokie
Downers Grove
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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 466AverageC$ 689FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 505AverageC$ 652FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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

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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?

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