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Cheap flights from Ottawa to Chicago O'Hare Intl Airport from C$ 240

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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
3 Aug — 10 Aug1
1 adult

Cheapflights Tip: The best prices from Ottawa to Chicago O'Hare Intl are usually found in June or May, booked 71 days in advance, depart on a Tuesday or Friday 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 29 July 2025.

Round-trip from

C$ 446

One-way from

C$ 240

Popular in

March

Cheapest in

June

Average price

C$ 686

Good round-trip deal

C$ 574 or less

Good one-way deal

C$ 471 or less
United Airlines
  • United Airlines
  • 3/9-7/9
  • Nonstop
  • 4h 41m total
  • Ottawa to Chicago
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Air Canada
  • Air Canada
  • 18/9
  • 1 total stop
  • 4h 51m total
  • Ottawa to Chicago
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Highest demand for flights based on searches. 11% potential increase in price (C$ 122 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 July 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 July 2025.

Wed 3/96:33 a.m.YOW - ORD
Nonstop2h 27mUnited Airlines
Sun 7/910:50 a.m.ORD - YOW
Nonstop2h 14mUnited Airlines
Deal found 29/7C$ 446
Thu 11/96:00 a.m.YOW - ORD
1 stop4h 51mAir Canada
Thu 18/98:25 p.m.ORD - YOW
1 stop4h 09mAir Canada
Deal found 28/7C$ 450
Fri 19/97:50 a.m.YOW - ORD
1 stop9h 53mWestJet
Mon 22/95:30 p.m.ORD - YOW
1 stop20h 16mWestJet
Deal found 26/7C$ 454
Thu 11/99:05 a.m.YOW - ORD
1 stop6h 50mMultiple Airlines
Thu 18/95:05 a.m.ORD - YOW
2 stops18h 17mMultiple Airlines
Deal found 28/7C$ 528

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 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

Wed 3/9

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

Nonstop2h 27m

Chicago O'Hare Intl

Sun 7/9

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

Nonstop2h 14m

C$ 446

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 11/9

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

1 stop4h 51m

Chicago O'Hare Intl

Thu 18/9

8:25 p.m.-1:34 a.m.

1 stop4h 09m

C$ 450

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 19/9

7:50 a.m.-4:43 p.m.

1 stop9h 53m

Chicago O'Hare Intl

Mon 22/9

5:30 p.m.-2:46 p.m.

1 stop20h 16m

C$ 454

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 11/9

9:05 a.m.-2:55 p.m.

1 stop6h 50m

Chicago O'Hare Intl

Thu 18/9

5:05 a.m.-12:22 a.m.

2 stops18h 17m

C$ 528

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 18/9

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

1 stop4h 51m

C$ 240

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 3/10

7:50 a.m.-4:43 p.m.

1 stop9h 53m

C$ 257

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 10/9

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

Nonstop2h 29m

C$ 269

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 30/10

9:25 a.m.-4:51 p.m.

1 stop8h 26m

C$ 287

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/7

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 25 July 2025.

The best time to book flights from Ottawa to Chicago O'Hare Intl Airport is 71 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 29 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 29 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).

What’s the top layover airport for flights from Ottawa to Chicago O'Hare Intl Airport?

Share of one-stop round-trip flights from Ottawa to Chicago O'Hare Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YYZ) – chosen by Cheapflights users on 83% of one-stop itineraries from Ottawa to Chicago O'Hare Intl Airport on Cheapflights.

What’s the cheapest layover airport for flights from Ottawa to Chicago O'Hare Intl Airport?

Average round-trip fare for 1-stop flights from Ottawa to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 442.

What’s the fastest layover option from Ottawa to Chicago O'Hare Intl Airport?

Shortest average travel time for 1-stop one-way flights from Ottawa to Chicago O'Hare Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 3h 35m.

Which airport typically offers the quickest layover for flights from Ottawa to Chicago O'Hare Intl Airport?

Average layover duration for 1-stop one-way flights from Ottawa to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 31m.

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 July 2025.
Read through reviews of airlines operating flights from Ottawa to Chicago O'Hare Intl Airport, such as United Airlines,WestJet, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,899 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

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
8,899 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

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
2,973 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

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
9,822 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

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 United Airlines. Our recent data shows that you can find tickets from as low as C$ 446 on this airline. Additional options worth looking into are Air Canada and WestJet, starting at C$ 450 and C$ 454 round-trip. United Airlines is 36% 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$ 240 on Air Canada. Other airlines that offer cheap prices include WestJet from C$ 257 and United Airlines from C$ 269 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 (93%), ANA (91%), GoJet( 89%).

  • 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$ 2,203, our data indicates the cheapest price to be C$ 278. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 449.

  • 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Elk Grove Village
Evanston
Des Plaines
Skokie
Downers Grove
Naperville
Bolingbrook
Romeoville

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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 July 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 462AverageC$ 681FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 500AverageC$ 642FlexibilityNo 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?

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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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