What are the cheapest airlines flying from Ottawa to Chicago round-trip?

Currently priced at C$ 410, Porter Airlines will fly you from Ottawa to Chicago and back. In addition to Porter Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Air Canada - these airlines can fly you to your destination from C$ 435 and C$ 471, respectively. You may be able to fly from Ottawa to Chicago for 27% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Ottawa to Chicago one-way?

The cheapest airlines for a one-way flight from Ottawa to Chicago are Porter Airlines (C$ 253), Air Canada (C$ 298), and United Airlines (C$ 302).

What is the cheapest day to fly from Ottawa to Chicago?

Travelers seeking maximum savings on their Ottawa to Chicago flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Chicago 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 when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Chicago, 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).

What are the cheapest flights from Ottawa to Chicago?

Looking at all options, your cheapest flight can be booked for C$ 233. While the most popular route (Ottawa - Chicago O'Hare Intl) can be booked for C$ 435 on average our data indicates C$ 1,655 when flying from Ottawa to Chicago.

What are the most reliable airlines from Ottawa to Chicago?

The top 3 most reliable airlines when flying from Ottawa to Chicago are Avianca (92%), ANA (90%) and GoJet (89%).

What is the cheapest day to fly round-trip from Ottawa to Chicago?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 13% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Ottawa to Chicago?

To save on the cost of your flight from Ottawa to Chicago, book at least 41 days before your planned departure. Booking around this time can save you about 83% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 594 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 859.

What is the cheapest month to fly from Ottawa to Chicago?

Due to multiple factors, expect to potentially pay more when booking in November. For low rates, May can be a great choice for travel to Chicago. Flights to Chicago from Ottawa in May are about C$ 569 on average during May, but can be found for as low as C$ 291.

What airport do you fly from for flights from Ottawa to Chicago?

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. 3 airlines have flights from Ottawa to Chicago on a regular basis. Booking flights from Ottawa to Chicago should not be difficult; the airport handles an average of 12 outbound flights to Chicago per day.

Can I find deals for flights from Ottawa to Chicago that include hotel bookings?

Yes. In addition to deals on Ottawa to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ottawa to Chicago?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Chicago.

Can I find deals for business class flights from Ottawa to Chicago?

Yes. Cheapflights offers flight deals from Ottawa to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 253+ Flights from Ottawa to Chicago

Cheapflights Tip: The best prices from Ottawa to Chicago are usually found in May or April, booked 65 days in advance, depart on a Tuesday or Friday and return on a Tuesday

Cheap flight deals from Ottawa to Chicago

Round-trip from	C$ 410
One-way from	C$ 253
Popular in	November
Cheapest in	May
Average price	C$ 622
Good round-trip deal	C$ 652 or less
Good one-way deal	C$ 363 or less

Porter Airlines
19/9-22/9
2 total stops
10h 18m total
Ottawa to Chicago

Search Deals

Porter Airlines
28/7
1 total stop
4h 49m total
Ottawa to Chicago

Search Deals

Highest demand for flights based on searches. 5% potential increase in price (C$ 44 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

Price to beat on a round-trip flight from Ottawa to Chicago (CHI).

Search Deals

Price to beat on a one-way flight from Ottawa to Chicago (CHI).

Search Deals

Find flight deals from Ottawa to Chicago

Cheapest flights from Ottawa to Chicago
Explore the most affordable flight options available from Ottawa to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 June 2025.

Fri 19/91:25 p.m.YOW - MDW

1 stop3h 59mPorter Airlines

Mon 22/99:15 a.m.MDW - YOW

1 stop6h 19mPorter Airlines

Deal found 29/6C$ 410

Thu 25/910:37 a.m.YOW - ORD

Nonstop2h 24mUnited Airlines

Wed 8/1010:50 a.m.ORD - YOW

Nonstop2h 14mUnited Airlines

Deal found 28/6C$ 435

Thu 18/99:05 a.m.YOW - ORD

1 stop6h 50mAir Canada

Sun 28/96:20 p.m.ORD - YOW

1 stop4h 59mAir Canada

Deal found 28/6C$ 471

Fri 11/73:50 p.m.YOW - ORD

1 stop9h 03mMultiple Airlines

Sun 13/75:05 a.m.ORD - YOW

1 stop11h 10mMultiple Airlines

Deal found 27/6C$ 520

Mon 8/96:00 a.m.YOW - ORD

1 stop11h 43mWestJet

Wed 10/95:30 p.m.ORD - YOW

2 stops21h 49mWestJet

Deal found 28/6C$ 546

Wed 30/711:00 a.m.YOW - MDW

1 stop6h 24mMultiple Airlines

Wed 6/811:39 a.m.MDW - YOW

2 stops18h 06mMultiple Airlines

Deal found 30/6C$ 647

Fri 19/95:55 a.m.YOW - MDW

2 stops16h 49mWestJet

Tue 23/91:05 p.m.MDW - YOW

2 stops10h 17mWestJet

Deal found 28/6C$ 706

Tue 12/85:55 a.m.YOW - MDW

2 stops12h 52mDelta

Tue 19/812:43 p.m.MDW - YOW

2 stops10h 39mDelta

Deal found 28/6C$ 795

Best flights from Ottawa to Chicago
Discover carefully curated flight deals from Ottawa to Chicago that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 30 June 2025.

Fri 19/91:25 p.m.YOW - MDW

1 stop3h 59mPorter Airlines

Mon 22/99:15 a.m.MDW - YOW

1 stop6h 19mPorter Airlines

Deal found 29/6C$ 410

Thu 25/910:37 a.m.YOW - ORD

Nonstop2h 24mUnited Airlines

Wed 8/1010:50 a.m.ORD - YOW

Nonstop2h 14mUnited Airlines

Deal found 28/6C$ 435

Thu 18/99:05 a.m.YOW - ORD

1 stop6h 50mAir Canada

Sun 28/96:20 p.m.ORD - YOW

1 stop4h 59mAir Canada

Deal found 28/6C$ 471

Fri 11/73:50 p.m.YOW - ORD

1 stop9h 03mMultiple Airlines

Sun 13/75:05 a.m.ORD - YOW

1 stop11h 10mMultiple Airlines

Deal found 27/6C$ 520

Mon 8/96:00 a.m.YOW - ORD

1 stop11h 43mWestJet

Wed 10/95:30 p.m.ORD - YOW

2 stops21h 49mWestJet

Deal found 28/6C$ 546

Tue 12/85:55 a.m.YOW - MDW

2 stops12h 52mDelta

Tue 19/812:43 p.m.MDW - YOW

2 stops10h 39mDelta

Deal found 28/6C$ 795

Wed 30/711:00 a.m.YOW - MDW

1 stop6h 24mMultiple Airlines

Wed 6/811:39 a.m.MDW - YOW

2 stops18h 06mMultiple Airlines

Deal found 30/6C$ 647

Fri 19/95:55 a.m.YOW - MDW

2 stops16h 49mWestJet

Tue 23/91:05 p.m.MDW - YOW

2 stops10h 17mWestJet

Deal found 28/6C$ 706

Direct flights from Ottawa to Chicago
Explore direct flight options from Ottawa to Chicago based on user searches, and compare prices and availability for your desired travel dates. Data last updated 30 June 2025.

Thu 25/910:37 a.m.YOW - ORD

Nonstop2h 24mUnited Airlines

Wed 8/1010:50 a.m.ORD - YOW

Nonstop2h 14mUnited Airlines

Deal found 28/6C$ 435

Tue 12/86:33 a.m.YOW - ORD

Nonstop2h 22mAir Canada

Tue 19/86:06 p.m.ORD - YOW

Nonstop2h 29mAir Canada

Deal found 28/6C$ 590

Mon 14/75:25 p.m.YOW - ORD

Nonstop2h 28mMultiple Airlines

Thu 17/76:15 p.m.ORD - YOW

Nonstop2h 20mMultiple Airlines

Deal found 29/6C$ 824

Last-minute flights from Ottawa to Chicago
Discover last-minute flight deals from Ottawa to Chicago. Data last updated 30 June 2025 and is based on user searches.

Sat 5/710:37 a.m.YOW - ORD

Nonstop2h 19mUnited Airlines

Tue 8/71:56 p.m.ORD - YOW

Nonstop2h 10mUnited Airlines

Deal found 28/6C$ 1,156

Sat 5/711:05 a.m.YOW - ORD

1 stop4h 50mAir Canada

Tue 8/710:40 a.m.ORD - YOW

1 stop5h 39mAir Canada

Deal found 28/6C$ 1,171

Sat 5/75:55 a.m.YOW - MDW

2 stops28h 46mWestJet

Tue 8/79:24 a.m.MDW - YOW

2 stops14h 24mWestJet

Deal found 28/6C$ 1,198

Sat 5/75:55 a.m.YOW - ORD

2 stops16h 34mWestJet

Tue 8/76:00 a.m.ORD - YOW

2 stops17h 48mWestJet

Deal found 28/6C$ 1,198

Sat 5/75:15 p.m.YOW - MDW

1 stop16h 30mPorter Airlines

Tue 8/79:40 a.m.MDW - YOW

1 stop6h 23mPorter Airlines

Deal found 28/6C$ 1,365

Fri 11/73:50 p.m.YOW - ORD

1 stop9h 03mMultiple Airlines

Sun 13/75:05 a.m.ORD - YOW

1 stop11h 10mMultiple Airlines

Deal found 27/6C$ 520

Sun 20/75:55 a.m.YOW - MDW

2 stops13h 45mDelta

Wed 23/76:00 a.m.MDW - YOW

2 stops17h 22mDelta

Deal found 30/6C$ 1,119

Thu 24/75:15 a.m.YOW - ORD

1 stop4h 54mAir Canada

Mon 28/78:40 a.m.ORD - YOW

1 stop4h 04mAir Canada

Deal found 29/6C$ 561

Sat 26/75:55 a.m.YOW - ORD

2 stops7h 55mWestJet

Sat 2/86:15 p.m.ORD - YOW

2 stops29h 07mWestJet

Deal found 28/6C$ 714

Sat 26/75:55 a.m.YOW - MDW

2 stops16h 47mWestJet

Sat 2/87:21 p.m.MDW - YOW

2 stops28h 01mWestJet

Deal found 28/6C$ 781

Wed 30/711:00 a.m.YOW - MDW

1 stop6h 24mPorter Airlines

Wed 6/89:40 a.m.MDW - YOW

1 stop6h 23mPorter Airlines

Deal found 30/6C$ 428

Wed 30/76:33 a.m.YOW - ORD

Nonstop2h 22mUnited Airlines

Sat 6/910:50 a.m.ORD - YOW

Nonstop2h 14mUnited Airlines

Deal found 27/6C$ 510

One-way flights from Ottawa to Chicago
Search for one-way flight options from Ottawa to Chicago. Find affordable one-way fares based on user searches. Data last updated 30 June 2025.

Mon 28/712:35 p.m.YOW - MDW

1 stop4h 49mPorter Airlines

Deal found 28/6C$ 253

Mon 28/74:25 p.m.YOW - ORD

1 stop18h 49mMultiple Airlines

Deal found 28/6C$ 287

Wed 13/811:05 a.m.YOW - ORD

1 stop4h 50mAir Canada

Deal found 29/6C$ 298

Mon 28/76:33 a.m.YOW - ORD

Nonstop2h 22mUnited Airlines

Deal found 28/6C$ 302

Wed 13/85:55 a.m.YOW - MDW

2 stops12h 42mWestJet

Deal found 29/6C$ 360

Tue 26/85:55 a.m.YOW - MDW

2 stops7h 33mDelta

Deal found 30/6C$ 410

Tue 8/74:25 p.m.YOW - MDW

2 stops19h 15mMultiple Airlines

Deal found 30/6C$ 416

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 19/9

1:25 p.m.-4:24 p.m.

1 stop3h 59m

Chicago Midway

Mon 22/9

9:15 a.m.-4:34 p.m.

1 stop6h 19m

C$ 410

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 25/9

10:37 a.m.-12:01 p.m.

Nonstop2h 24m

Chicago O'Hare Intl

Wed 8/10

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

Nonstop2h 14m

C$ 435

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 18/9

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

1 stop6h 50m

Chicago O'Hare Intl

Sun 28/9

6:20 p.m.-12:19 a.m.

1 stop4h 59m

C$ 471

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 11/7

3:50 p.m.-11:53 p.m.

1 stop9h 03m

Chicago O'Hare Intl

Sun 13/7

5:05 a.m.-5:15 p.m.

1 stop11h 10m

C$ 520

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 8/9

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

1 stop11h 43m

Chicago O'Hare Intl

Wed 10/9

5:30 p.m.-4:19 p.m.

2 stops21h 49m

C$ 546

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Wed 30/7

11:00 a.m.-4:24 p.m.

1 stop6h 24m

Chicago Midway

Wed 6/8

11:39 a.m.-6:45 a.m.

2 stops18h 06m

C$ 647

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 19/9

5:55 a.m.-9:44 p.m.

2 stops16h 49m

Chicago Midway

Tue 23/9

1:05 p.m.-12:22 a.m.

2 stops10h 17m

C$ 706

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 12/8

5:55 a.m.-5:47 p.m.

2 stops12h 52m

Chicago Midway

Tue 19/8

12:43 p.m.-12:22 a.m.

2 stops10h 39m

C$ 795

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Mon 28/7

12:35 p.m.-4:24 p.m.

1 stop4h 49m

C$ 253

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 28/7

4:25 p.m.-10:14 a.m.

1 stop18h 49m

C$ 287

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/6

Showing 1-10 of 15 results

Best time to book a flight from Ottawa to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago 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

How far ahead should I book a flight from Ottawa to Chicago?

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to Chicago. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ottawa to Chicago?

Currently, January is the cheapest month in which you can book a flight from Ottawa to Chicago (average of C$ 261). Flying from Ottawa to Chicago in March is currently the most expensive (average of C$ 351). 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 CHI?

Unlike in the morning, when flights are generally more expensive, you can save up to 45% on flights from Ottawa to Chicago by exploring options for tickets at noon.

Weekly flight availability from Ottawa to Chicago

The most flights from YOW to CHI 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?

Reviews of airlines servicing Chicago

Get a feel of what it's like to fly with Porter Airlines,Delta, andUnited Airlines from Ottawa to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

296 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!

Porter Airlines

8.0

Very good

296 reviews

Porter Airlines

8.0

Very good

296 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

Delta

8.0

Very good

7,969 reviews

Porter Airlines

8.0

Very good

296 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

United Airlines

7.4

Good

8,852 reviews

Porter Airlines

8.0

Very good

296 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

WestJet

7.2

Good

2,908 reviews

Porter Airlines

8.0

Very good

296 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

Air Canada

7.1

Good

9,657 reviews

Porter Airlines

8.0

Very good

296 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

Related info for your journey

What airport do you fly from for flights from Ottawa to Chicago?
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. 3 airlines have flights from Ottawa to Chicago on a regular basis. Booking flights from Ottawa to Chicago should not be difficult; the airport handles an average of 12 outbound flights to Chicago per day.
What are the cheapest airlines flying from Ottawa to Chicago round-trip?
Currently priced at C$ 410, Porter Airlines will fly you from Ottawa to Chicago and back. In addition to Porter Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Air Canada - these airlines can fly you to your destination from C$ 435 and C$ 471, respectively. You may be able to fly from Ottawa to Chicago for 27% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Ottawa to Chicago one-way?
The cheapest airlines for a one-way flight from Ottawa to Chicago are Porter Airlines (C$ 253), Air Canada (C$ 298), and United Airlines (C$ 302).
What are the most reliable airlines from Ottawa to Chicago?
The top 3 most reliable airlines when flying from Ottawa to Chicago are Avianca (92%), ANA (90%) and GoJet (89%).
What are the cheapest flights from Ottawa to Chicago?
Looking at all options, your cheapest flight can be booked for C$ 233. While the most popular route (Ottawa - Chicago O'Hare Intl) can be booked for C$ 435 on average our data indicates C$ 1,655 when flying from Ottawa to Chicago.
Can I find deals for flights from Ottawa to Chicago that include hotel bookings?
Yes. In addition to deals on Ottawa to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ottawa to Chicago?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Chicago.
Can I find deals for business class flights from Ottawa to Chicago?
Yes. Cheapflights offers flight deals from Ottawa to Chicago 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?
Currently, January is the cheapest month in which you can book a flight from Ottawa to Chicago (average of C$ 261). Flying from Ottawa to Chicago in March is currently the most expensive (average of C$ 351). 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

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

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Top 3 airlines flying from Ottawa to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	CheapestC$ 367	AverageC$ 497	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Air Canada	CheapestC$ 498	AverageC$ 658	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 532	AverageC$ 687	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ottawa to Chicago?

When you search for this flight from Ottawa to Chicago, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Chicago?

Cheapflights helps you find that perfect flight to Chicago from Ottawa by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ottawa to Chicago with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to Chicago flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ottawa to Chicago become cheaper?

Yes, Cheapflights offers price alerts on Ottawa to Chicago flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from Ottawa to Chicago from C$ 253

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 28/7. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Ottawa to Chicago are usually found in May or April, booked 65 days in advance, depart on a Tuesday or Friday and return on a Tuesday

Cheap flight deals from Ottawa to Chicago

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ottawa to Chicago

Cheapest flights from Ottawa to ChicagoExplore the most affordable flight options available from Ottawa to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 June 2025.

Explore the most affordable flight options available from Ottawa to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 June 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to Chicago that are best for you.

Best time to book a flight from Ottawa to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Ottawa with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to Chicago

How far ahead should I book a flight from Ottawa to Chicago?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Chicago. Price data was last updated on 27 June 2025.

What is the cheapest month to book a flight from Ottawa to Chicago?

What is the cheapest time of day to fly from YOW to CHI?

Find hourly flight availability from Ottawa to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 June 2025.

Weekly flight availability from Ottawa to Chicago

Explore weekly flight availability from Ottawa to Chicago. 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 30 June 2025.

How much does it cost to fly round-trip from Ottawa to Chicago?

Reviews of airlines servicing Chicago

Get a feel of what it's like to fly with Porter Airlines,Delta, andUnited Airlines from Ottawa to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Chicago. 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?

What are the cheapest airlines flying from Ottawa to Chicago round-trip?

What are the cheapest airlines to fly from Ottawa to Chicago one-way?

What are the most reliable airlines from Ottawa to Chicago?

What are the cheapest flights from Ottawa to Chicago?

Can I find deals for flights from Ottawa to Chicago that include hotel bookings?

How can I find direct flights from Ottawa to Chicago?

Can I find deals for business class flights from Ottawa to Chicago?

What is the cheapest month to book a flight from Ottawa to Chicago?

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.

Alternative routes for Ottawa to Chicago

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Ottawa to Chicago

Fly with Cheapflights

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Cheapest flights from Ottawa to Chicago
Explore the most affordable flight options available from Ottawa to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 June 2025.