Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Ottawa to Chicago O'Hare Intl Airport from C$ 250

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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
16 Jul — 23 Jul1
1 adult

Cheapflights Tip: The best prices from Ottawa to Chicago O'Hare Intl are usually found in May or June, booked 23 days in advance, depart on a Friday or Tuesday 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 11 July 2025.

Round-trip from

C$ 435

One-way from

C$ 250

Popular in

March

Cheapest in

May

Average price

C$ 685

Good round-trip deal

C$ 609 or less

Good one-way deal

C$ 370 or less
United Airlines
  • United Airlines
  • 5/9-8/9
  • Nonstop
  • 4h 40m total
  • Ottawa to Chicago
Search Deals
United Airlines
  • United Airlines
  • 7/9
  • Nonstop
  • 2h 29m total
  • Ottawa to Chicago
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 93 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
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.
Search Deals

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 July 2025.

Fri 5/95:25 p.m.YOW - ORD
Nonstop2h 29mUnited Airlines
Mon 8/91:55 p.m.ORD - YOW
Nonstop2h 11mUnited Airlines
Deal found 9/7C$ 435
Fri 19/96:00 a.m.YOW - ORD
1 stop11h 43mWestJet
Mon 22/95:30 p.m.ORD - YOW
1 stop30h 10mWestJet
Deal found 10/7C$ 438
Fri 5/96:00 a.m.YOW - ORD
1 stop4h 51mAir Canada
Mon 8/98:40 a.m.ORD - YOW
1 stop4h 11mAir Canada
Deal found 9/7C$ 449
Wed 13/83:50 p.m.YOW - ORD
1 stop9h 09mMultiple Airlines
Mon 18/85:16 p.m.ORD - YOW
1 stop22h 50mMultiple Airlines
Deal found 9/7C$ 499
Thu 24/76:33 a.m.YOW - ORD
Nonstop2h 22mLufthansa
Mon 28/76:15 p.m.ORD - YOW
Nonstop2h 20mLufthansa
Deal found 9/7C$ 544

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 July 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

Fri 5/9

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

Nonstop2h 29m

Chicago O'Hare Intl

Mon 8/9

1:55 p.m.-5:06 p.m.

Nonstop2h 11m

C$ 435

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 19/9

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Chicago O'Hare Intl

Mon 22/9

5:30 p.m.-12:40 a.m.

1 stop30h 10m

C$ 438

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 5/9

6:00 a.m.-9:51 a.m.

1 stop4h 51m

Chicago O'Hare Intl

Mon 8/9

8:40 a.m.-1:51 p.m.

1 stop4h 11m

C$ 449

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 13/8

3:50 p.m.-11:59 p.m.

1 stop9h 09m

Chicago O'Hare Intl

Mon 18/8

5:16 p.m.-5:06 p.m.

1 stop22h 50m

C$ 499

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 24/7

6:33 a.m.-7:55 a.m.

Nonstop2h 22m

Chicago O'Hare Intl

Mon 28/7

6:15 p.m.-9:35 p.m.

Nonstop2h 20m

C$ 544

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 7/9

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

Nonstop2h 29m

C$ 250

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 7/9

6:00 a.m.-9:51 a.m.

1 stop4h 51m

C$ 257

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 5/8

3:50 p.m.-8:55 a.m.

1 stop18h 05m

C$ 265

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 7/9

5:15 p.m.-4:43 p.m.

2 stops24h 28m

C$ 360

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 24/8

5:55 a.m.-6:05 p.m.

2 stops13h 10m

C$ 444

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/7

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 27 June 2025.

The best time to book flights from Ottawa to Chicago O'Hare Intl Airport is 23 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$ 352). 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 July 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 16% 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 11 July 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).

How much does it cost to fly round-trip from Ottawa to Chicago O'Hare Intl Airport?

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 July 2025.
Read through reviews of airlines operating flights from Ottawa to Chicago O'Hare Intl Airport, such as Delta,United Airlines, andWestJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,951 reviews
Delta
8.0
Very good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,846 reviews
Delta
8.0
Very good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
WestJet
7.2
Good
2,924 reviews
Delta
8.0
Very good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air Canada
7.1
Good
9,696 reviews
Delta
8.0
Very good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Lufthansa
6.8
Okay
7,199 reviews
Delta
8.0
Very good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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 United Airlines. Our recent data shows that you can find tickets from as low as C$ 435 on this airline. Additional options worth looking into are WestJet and Air Canada, starting at C$ 438 and C$ 449 round-trip. United Airlines is 39% 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$ 250 on United Airlines. Other airlines that offer cheap prices include Air Canada from C$ 257 and WestJet from C$ 360 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: GoJet (93%), Avianca (93%), ANA( 93%).

  • 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$ 1,892, our data indicates the cheapest price to be C$ 233. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 435.

  • 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$ 352). 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 Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Elk Grove Village
Evanston
Downers Grove
Des Plaines
Skokie
Naperville
Bolingbrook
Romeoville

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 498AverageC$ 643FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 532AverageC$ 686FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.