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Cheap flights from Ottawa to Chicago O'Hare Intl Airport from C$ 272

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 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
25 May — 1 Jun1
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 25 April 2026.

Mon 11/511:00 a.m.
YOW
-
ORD
2 stops8h 38m
Multiple Airlines
Wed 13/51:49 p.m.
ORD
-
YOW
1 stop21h 26m
Multiple Airlines
Deal found 21/4C$ 538
Mon 11/52:20 p.m.
YOW
-
ORD
1 stop5h 18m
Multiple Airlines
Thu 14/57:33 p.m.
ORD
-
YOW
1 stop18h 27m
Multiple Airlines
Deal found 21/4C$ 539
Tue 12/58:00 a.m.
YOW
-
ORD
2 stops13h 11m
Multiple Airlines
Thu 14/57:33 p.m.
ORD
-
YOW
1 stop18h 27m
Multiple Airlines
Deal found 21/4C$ 553
Tue 12/59:05 a.m.
YOW
-
ORD
1 stop12h 06m
Multiple Airlines
Wed 13/51:49 p.m.
ORD
-
YOW
1 stop21h 26m
Multiple Airlines
Deal found 21/4C$ 556
Fri 8/57:00 a.m.
YOW
-
ORD
2 stops13h 51m
Multiple Airlines
Mon 11/51:49 p.m.
ORD
-
YOW
1 stop21h 26m
Multiple Airlines
Deal found 24/4C$ 562
Fri 21/82:20 p.m.
YOW
-
ORD
1 stop26h 51m
Multiple Airlines
Mon 31/85:10 a.m.
ORD
-
YOW
1 stop9h 05m
Multiple Airlines
Deal found 23/4C$ 564
Fri 29/58:40 a.m.
YOW
-
ORD
1 stop6h 37m
American Airlines
Sun 31/58:08 a.m.
ORD
-
YOW
1 stop5h 47m
American Airlines
Deal found 22/4C$ 571
Sat 6/67:00 a.m.
YOW
-
ORD
1 stop17h 15m
Multiple Airlines
Thu 11/612:59 p.m.
ORD
-
YOW
1 stop22h 18m
Multiple Airlines
Deal found 20/4C$ 575
Thu 28/57:20 a.m.
YOW
-
ORD
1 stop10h 20m
Multiple Airlines
Fri 29/51:50 p.m.
ORD
-
YOW
2 stops23h 43m
Multiple Airlines
Deal found 21/4C$ 576

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 25 April 2026.

Round-trip from

C$ 538

One-way from

C$ 272

Popular in

March

Cheapest in

September

Average price

C$ 906

Good round-trip deal

C$ 567 or less

Good one-way deal

C$ 314 or less
11/5-13/5
  • 11/5-13/5
  • 3 total stops
  • 30h 04m total
  • Ottawa to Chicago
Search Deals
18/5
  • 18/5
  • 2 total stops
  • 28h 31m total
  • Ottawa to Chicago
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (C$ 413 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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.
Search Deals

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 25 April 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

Wed 10/6

9:55 a.m.-1:10 p.m.

1 stop4h 15m

Chicago O'Hare Intl

Sat 13/6

10:41 a.m.-1:59 p.m.

Nonstop2h 18m

C$ 859

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 12/6

6:25 a.m.-7:45 a.m.

Nonstop2h 20m

Chicago O'Hare Intl

Sun 14/6

2:00 p.m.-7:51 p.m.

1 stop4h 51m

C$ 859

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 21/5

10:44 a.m.-12:11 p.m.

Nonstop2h 27m

Chicago O'Hare Intl

Sun 24/5

6:22 p.m.-9:35 p.m.

Nonstop2h 13m

C$ 866
Quickest round-trip

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 29/5

6:25 a.m.-7:45 a.m.

Nonstop2h 20m

Chicago O'Hare Intl

Sun 31/5

6:22 p.m.-9:35 p.m.

Nonstop2h 13m

C$ 868

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 3/7

5:20 p.m.-6:47 p.m.

Nonstop2h 27m

Chicago O'Hare Intl

Sat 11/7

1:55 p.m.-5:07 p.m.

Nonstop2h 12m

C$ 868

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 10/6

6:25 a.m.-7:45 a.m.

Nonstop2h 20m

Chicago O'Hare Intl

Sat 13/6

10:41 a.m.-1:59 p.m.

Nonstop2h 18m

C$ 869

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 30/5

10:44 a.m.-12:11 p.m.

Nonstop2h 27m

Chicago O'Hare Intl

Tue 2/6

6:22 p.m.-9:35 p.m.

Nonstop2h 13m

C$ 869

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 12/6

10:44 a.m.-12:11 p.m.

Nonstop2h 27m

Chicago O'Hare Intl

Sun 14/6

6:22 p.m.-9:35 p.m.

Nonstop2h 13m

C$ 869

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 12/6

10:44 a.m.-12:11 p.m.

Nonstop2h 27m

Chicago O'Hare Intl

Mon 15/6

10:41 a.m.-1:59 p.m.

Nonstop2h 18m

C$ 869

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 24/7

5:20 p.m.-6:47 p.m.

Nonstop2h 27m

Chicago O'Hare Intl

Sun 26/7

6:12 p.m.-11:54 p.m.

1 stop4h 42m

C$ 869

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/4

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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, September is the cheapest month in which you can book a flight from Ottawa to Chicago O'Hare Intl Airport (average of C$ 468). Flying from Ottawa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 1,211). 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 25 April 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?

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 25 April 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
9,650 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

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
9,650 reviews
United Airlines
7.4
Good
9,650 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

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
10,966 reviews
United Airlines
7.4
Good
9,650 reviews
Check prices

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

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

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

    Airlines like Air Canada and 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 can typically vary by up to 1h 48m. 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$ 419 on this airline. An additional option worth looking into is United Airlines, starting at C$ 459. Air Canada is 45% 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 (72%), ANA (70%), Air Canada( 66%).

  • 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$ 681, our data indicates the cheapest price to be C$ 268. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 562.

  • 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, September is the cheapest month in which you can book a flight from Ottawa to Chicago O'Hare Intl Airport (average of C$ 468). Flying from Ottawa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 1,211). 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
Downers Grove
Elk Grove Village
Racine
Naperville
Bolingbrook
Romeoville
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 25 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 419AverageC$ 548FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 459AverageC$ 566FlexibilityNo 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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