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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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
30 Mar — 6 Apr1
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 Saturday 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 25 March 2025.

Round-trip from

C$ 520

One-way from

C$ 274

Popular in

March

Cheapest in

December

Average price

C$ 921

Good round-trip deal

C$ 608 or less

Good one-way deal

C$ 351 or less
5/5-10/5
  • 5/5-10/5
  • 2 total stops
  • 33h 41m total
  • Ottawa to Chicago
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12/5
  • 12/5
  • 1 total stop
  • 28h 57m total
  • Ottawa to Chicago
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease (C$ 18 potential savings vs. average RT price).
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Average for round-trip flights in March 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 25 March 2025.

Mon 5/54:10 p.m.YOW - ORD
1 stop15h 53mMultiple Airlines
Sat 10/59:08 p.m.ORD - YOW
1 stop17h 48mMultiple Airlines
Deal found 24/3C$ 520
Wed 14/511:05 a.m.YOW - ORD
1 stop4h 50mAir Canada
Mon 26/58:40 a.m.ORD - YOW
1 stop4h 05mAir Canada
Deal found 23/3C$ 576
Thu 1/55:25 p.m.YOW - ORD
Nonstop2h 29mUnited Airlines
Sun 4/57:00 a.m.ORD - YOW
1 stop6h 27mUnited Airlines
Deal found 24/3C$ 632
Sun 4/55:55 a.m.YOW - ORD
2 stops11h 15mWestJet
Sat 10/55:30 p.m.ORD - YOW
1 stop30h 11mWestJet
Deal found 24/3C$ 699
Wed 14/55:55 a.m.YOW - ORD
2 stops11h 35mDelta
Mon 26/59:00 a.m.ORD - YOW
2 stops14h 22mDelta
Deal found 23/3C$ 1,027

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 March 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

Mon 5/5

4:10 p.m.-7:03 a.m.

1 stop15h 53m

Chicago O'Hare Intl

Sat 10/5

9:08 p.m.-3:56 p.m.

1 stop17h 48m

C$ 520

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 14/5

11:05 a.m.-2:55 p.m.

1 stop4h 50m

Chicago O'Hare Intl

Mon 26/5

8:40 a.m.-1:45 p.m.

1 stop4h 05m

C$ 576

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 1/5

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

Nonstop2h 29m

Chicago O'Hare Intl

Sun 4/5

7:00 a.m.-2:27 p.m.

1 stop6h 27m

C$ 632

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 4/5

5:55 a.m.-4:10 p.m.

2 stops11h 15m

Chicago O'Hare Intl

Sat 10/5

5:30 p.m.-12:41 a.m.

1 stop30h 11m

C$ 699

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 14/5

5:55 a.m.-4:30 p.m.

2 stops11h 35m

Chicago O'Hare Intl

Mon 26/5

9:00 a.m.-12:22 a.m.

2 stops14h 22m

C$ 1,027

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 12/5

4:10 p.m.-8:07 p.m.

1 stop28h 57m

C$ 274

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 6/5

6:33 a.m.-8:02 a.m.

Nonstop2h 29m

C$ 344

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 6/5

6:30 a.m.-4:44 p.m.

2 stops11h 14m

C$ 368

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 21/7

5:55 a.m.-4:34 p.m.

2 stops11h 39m

C$ 668

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/3

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

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 21 March 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 25 March 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 13% 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 25 March 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 25 March 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines and WestJet 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.
Delta
8.0
Very good
7,890 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,890 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,605 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
WestJet
7.2
Good
2,785 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.0
Good
8,957 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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$ 576 on this airline. Additional options worth looking into are United Airlines and WestJet, starting at C$ 632 and C$ 699 round-trip. Air Canada is 28% 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$ 344 on Air Canada. Other airlines that offer cheap prices include United Airlines from C$ 368 and WestJet from C$ 668 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: ANA (81%), GoJet (80%), Avianca( 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$ 1,896, our data indicates the cheapest price to be C$ 217. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 444.

  • 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

Travelling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Elk Grove Village
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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 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 555AverageC$ 769FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 632AverageC$ 817FlexibilityNo 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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