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Cheap flights from Ottawa to Chicago O'Hare Intl Airport from C$ 274

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 13/6. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
4 May — 11 May1
1 adult

Cheapflights Tip: The best prices from Ottawa to Chicago O'Hare Intl are usually found in December or April, booked 83 days in advance, depart on a Tuesday or Friday and return on a Tuesday

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 29 April 2025.

Round-trip from

C$ 460

One-way from

C$ 274

Popular in

March

Cheapest in

December

Average price

C$ 669

Good round-trip deal

C$ 560 or less

Good one-way deal

C$ 322 or less
17/5-19/5
  • 17/5-19/5
  • 2 total stops
  • 16h 23m total
  • Ottawa to Chicago
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13/6
  • 13/6
  • 2 total stops
  • 19h 02m total
  • Ottawa to Chicago
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Highest demand for flights based on searches. 3% potential increase in price (C$ 40 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 24 potential savings vs. average RT price).
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Average for round-trip flights in April 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 29 April 2025.

Sat 17/54:25 p.m.YOW - ORD
1 stop8h 04mMultiple Airlines
Mon 19/57:47 a.m.ORD - YOW
1 stop8h 19mMultiple Airlines
Deal found 28/4C$ 460
Thu 19/610:37 a.m.YOW - ORD
Nonstop2h 19mAir Canada
Mon 23/62:16 p.m.ORD - YOW
Nonstop2h 13mAir Canada
Deal found 28/4C$ 615
Fri 20/67:29 p.m.YOW - ORD
1 stop5h 01mUnited Airlines
Tue 24/69:00 a.m.ORD - YOW
1 stop4h 27mUnited Airlines
Deal found 28/4C$ 640
Fri 23/56:10 a.m.YOW - ORD
2 stops11h 34mWestJet
Sun 25/55:30 p.m.ORD - YOW
1 stop12h 15mWestJet
Deal found 28/4C$ 729

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 29 April 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

Sat 17/5

4:25 p.m.-11:29 p.m.

1 stop8h 04m

Chicago O'Hare Intl

Mon 19/5

7:47 a.m.-5:06 p.m.

1 stop8h 19m

C$ 460

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 19/6

10:37 a.m.-11:56 a.m.

Nonstop2h 19m

Chicago O'Hare Intl

Mon 23/6

2:16 p.m.-5:29 p.m.

Nonstop2h 13m

C$ 615

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 20/6

7:29 p.m.-11:30 p.m.

1 stop5h 01m

Chicago O'Hare Intl

Tue 24/6

9:00 a.m.-2:27 p.m.

1 stop4h 27m

C$ 640

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 23/5

6:10 a.m.-4:44 p.m.

2 stops11h 34m

Chicago O'Hare Intl

Sun 25/5

5:30 p.m.-6:45 a.m.

1 stop12h 15m

C$ 729

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 14/5

5:55 a.m.-5:51 p.m.

2 stops12h 56m

Chicago O'Hare Intl

Fri 16/5

8:15 p.m.-12:22 a.m.

2 stops27h 07m

C$ 1,134

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 13/6

12:35 p.m.-6:37 a.m.

2 stops19h 02m

C$ 274

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 13/6

6:00 a.m.-9:52 a.m.

1 stop4h 52m

C$ 351

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 7/5

3:45 p.m.-4:44 p.m.

1 stop25h 59m

C$ 547

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 5/5

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

Nonstop2h 29m

C$ 592

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/4

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 25 April 2025.

The best time to book flights from Ottawa to Chicago O'Hare Intl Airport is 81 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$ 355). 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 29 April 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 14% on airfare.

Weekly flight availability from Ottawa to Chicago O'Hare Intl Airport

Explore weekly flight availability from Ottawa to O'Hare Intl. 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 29 April 2025.

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

Rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 43.0 mm.

Temperature in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 29 April 2025.
Peruse reviews from past customers who have flown with United Airlines, WestJet and Air Canada from Ottawa to Chicago to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,696 reviews
Check prices

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

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
8,696 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

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!
WestJet
7.2
Good
2,823 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

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
7.0
Good
9,228 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

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 12 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 Air Canada. Our recent data shows that you can find tickets from as low as C$ 615 on this airline. Additional options worth looking into are United Airlines and WestJet, starting at C$ 640 and C$ 729 round-trip. Air Canada is 20% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Ottawa to Chicago O'Hare Intl Airport one-way?

    One-way options have recently been found by users for as low as C$ 351 on Air Canada. Other airlines that offer cheap prices include WestJet from C$ 373 and United Airlines from C$ 592 one-way.

  • 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 (90%), Republic Airways (83%), ANA( 82%).

  • 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$ 1,404, our data indicates the cheapest price to be C$ 230. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 468.

  • 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$ 355). 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

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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 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 580AverageC$ 721FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 611AverageC$ 759FlexibilityNo cancel feeOn-time69%
Search United Airlines 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?

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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