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

Our cheapest airline available from Ottawa to Chicago is Porter Airlines. Our recent data shows that you can find tickets from as low as $318 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $414 and $441 round-trip. Porter Airlines is currently priced 24% below the average price you’ll pay for this route.

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

To fly one-way, consider booking your trip with Porter Airlines, which is currently one of the cheapest options available, starting at $174. WestJet flights start at $215 while deals on Air Canada start at $240 one-way.

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 Friday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the cheapest flights from Ottawa to Chicago?

Looking for the cheapest flight from Ottawa to Chicago? While on average our users pay $446, our data indicates the cheapest price to be $141. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around $339.

What are the most reliable airlines from Ottawa to Chicago?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ottawa to Chicago on time: ANA (81%), GoJet (80%), Avianca (80%).

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

It’s generally more expensive to depart on a Friday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 29 days in advance, which can save you up to 75% on flights from Ottawa to Chicago compared to booking the week you need them. Waiting 29 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $430. For sooner than that we have options available in the next 3 days from $577.

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

April is one of the best times of the year to fly to Chicago from Ottawa. Prices for April average $418 per person but you can even find prices for as low as $248. The most expensive prices can be found in the month of November. Opting for a April flight can save you 16% on your journey compared to booking in November

Most accurate provider : When it comes to deals on Ottawa-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-Chicago flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ottawa-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Located just 6.6 mi from the city center, Ottawa is the airport most travelers will use when flying to Chicago from Ottawa. Booking flights from Ottawa (YOW) to Chicago should be relatively easy as there are 10 daily outbound flights to Chicago from 3 different airlines.

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.

$174+ Flights from Ottawa to Chicago

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Find cheap flights from Ottawa to Chicago with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Ottawa to Chicago are usually found in April or May, booked 28 days in advance, depart on a Saturday or Wednesday and return on a Friday

Cheap flight deals from Ottawa to Chicago

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$318 (Kiwi.com)
One-way from	$174 (FlightHub)
Popular in	November
Cheapest in	April
Average price	$431
Good round-trip deal	$298 or less
Good one-way deal	$169 or less

Provider with most accurate pricing for Ottawa-Chicago (CHI) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ottawa-Chicago (CHI) flights.

Search Deals

From Ottawa to Chicago (CHI)

Search Deals

One-way flight from Ottawa to Chicago (CHI)

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($30 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 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 March 26, 2025.

Thu 5/112:35 pmYOW - MDW

1 stop4h 49mPorter Airlines

Mon 5/59:40 amMDW - YOW

1 stop5h 53mPorter Airlines

Deal found 3/25

$318

Thu 5/15:55 amYOW - ORD

1 stop10h 10mMultiple Airlines

Mon 5/512:00 pmORD - YOW

1 stop11h 22mMultiple Airlines

Deal found 3/25

$363

Wed 4/24:25 pmYOW - MDW

1 stop20h 18mMultiple Airlines

Sun 4/65:15 amMDW - YOW

1 stop10h 55mMultiple Airlines

Deal found 3/25

$378

Thu 5/15:25 pmYOW - ORD

Nonstop2h 29mAir Canada

Mon 5/57:00 amORD - YOW

1 stop5h 45mAir Canada

Deal found 3/25

$414

Thu 5/15:25 pmYOW - ORD

Nonstop2h 29mUnited Airlines

Sun 5/47:00 amORD - YOW

1 stop6h 27mUnited Airlines

Deal found 3/24

$441

Sun 5/45:55 amYOW - ORD

2 stops11h 15mWestJet

Sun 5/116:24 amORD - YOW

2 stops16h 58mWestJet

Deal found 3/25

$457

Thu 5/15:55 amYOW - MDW

2 stops13h 25mDelta

Mon 5/59:20 amMDW - YOW

2 stops14h 02mDelta

Deal found 3/25

$694

Thu 5/15:55 amYOW - ORD

2 stops11h 13mDelta

Mon 5/59:30 amORD - YOW

2 stops13h 52mDelta

Deal found 3/25

$694

Fri 5/307:15 pmYOW - MDW

2 stops15h 20mWestJet

Mon 6/29:20 amMDW - YOW

2 stops14h 21mWestJet

Deal found 3/25

$822

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 March 26, 2025.

Thu 5/112:35 pmYOW - MDW

1 stop4h 49mPorter Airlines

Mon 5/59:40 amMDW - YOW

1 stop5h 53mPorter Airlines

Deal found 3/25

$318

Thu 5/15:55 amYOW - ORD

1 stop10h 10mMultiple Airlines

Mon 5/512:00 pmORD - YOW

1 stop11h 22mMultiple Airlines

Deal found 3/25

$363

Thu 5/15:25 pmYOW - ORD

Nonstop2h 29mAir Canada

Mon 5/56:19 pmORD - YOW

Nonstop2h 16mAir Canada

Deal found 3/25

$414

Thu 5/15:25 pmYOW - ORD

Nonstop2h 29mUnited Airlines

Sun 5/47:00 amORD - YOW

1 stop6h 27mUnited Airlines

Deal found 3/24

$441

Sun 5/45:55 amYOW - ORD

2 stops11h 15mWestJet

Sat 5/105:15 pmORD - YOW

2 stops30h 07mWestJet

Deal found 3/25

$457

Thu 5/15:55 amYOW - MDW

2 stops13h 25mDelta

Mon 5/59:20 amMDW - YOW

2 stops14h 02mDelta

Deal found 3/25

$694

Fri 4/185:55 amYOW - MDW

1 stop11h 45mMultiple Airlines

Tue 4/2211:15 amMDW - YOW

1 stop11h 54mMultiple Airlines

Deal found 3/25

$387

Thu 5/15:55 amYOW - ORD

2 stops11h 13mDelta

Mon 5/59:30 amORD - YOW

2 stops13h 52mDelta

Deal found 3/25

$694

Fri 5/307:15 pmYOW - MDW

2 stops15h 20mWestJet

Mon 6/29:20 amMDW - YOW

2 stops14h 21mWestJet

Deal found 3/25

$822

Last-minute flights from Ottawa to Chicago
Discover last-minute flight deals from Ottawa to Chicago. Data last updated March 26, 2025 and is based on user searches.

Wed 4/24:25 pmYOW - MDW

1 stop20h 18mMultiple Airlines

Sun 4/65:15 amMDW - YOW

1 stop10h 55mMultiple Airlines

Deal found 3/25

$378

Wed 4/29:20 amYOW - ORD

1 stop15h 39mMultiple Airlines

Sun 4/68:10 amORD - YOW

1 stop8h 00mMultiple Airlines

Deal found 3/25

$424

Wed 4/25:55 amYOW - MDW

2 stops11h 19mDelta

Sun 4/62:57 pmMDW - YOW

2 stops8h 12mDelta

Deal found 3/25

$1,270

Thu 4/35:25 pmYOW - ORD

Nonstop2h 29mAir Canada

Mon 4/76:19 pmORD - YOW

Nonstop2h 16mAir Canada

Deal found 3/24

$684

Thu 4/35:55 amYOW - ORD

2 stops15h 50mWestJet

Mon 4/75:30 pmORD - YOW

2 stops24h 49mWestJet

Deal found 3/24

$827

Fri 4/411:50 amYOW - MDW

1 stop5h 50mPorter Airlines

Sun 4/611:15 amMDW - YOW

1 stop6h 19mPorter Airlines

Deal found 3/25

$391

Fri 4/42:10 pmYOW - ORD

2 stops7h 07mUnited Airlines

Sun 4/66:00 amORD - YOW

1 stop7h 27mUnited Airlines

Deal found 3/24

$762

Fri 4/45:55 amYOW - MDW

2 stops13h 23mWestJet

Sun 4/612:48 pmMDW - YOW

2 stops10h 21mWestJet

Deal found 3/25

$1,016

Fri 4/185:45 pmYOW - ORD

2 stops14h 18mMultiple Airlines

Tue 4/225:45 pmORD - YOW

2 stops22h 24mMultiple Airlines

Deal found 3/24

$372

Fri 4/257:00 amYOW - MDW

1 stop4h 20mPorter Airlines

Mon 4/2811:15 amMDW - YOW

1 stop6h 19mPorter Airlines

Deal found 3/25

$321

Fri 4/252:10 pmYOW - ORD

2 stops10h 30mUnited Airlines

Sun 4/272:05 pmORD - YOW

1 stop6h 29mUnited Airlines

Deal found 3/25

$499

Fri 4/255:55 amYOW - ORD

2 stops13h 19mDelta

Sun 4/275:30 amORD - YOW

2 stops17h 52mDelta

Deal found 3/25

$745

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 March 26, 2025.

Wed 5/710:15 amYOW - MDW

1 stop7h 39mPorter Airlines

Deal found 3/25

$174

Fri 4/254:55 pmYOW - ORD

1 stop15h 08mMultiple Airlines

Deal found 3/25

$195

Fri 6/135:55 amYOW - MDW

1 stop11h 59mMultiple Airlines

Deal found 3/26

$199

Mon 6/96:00 amYOW - ORD

1 stop11h 44mWestJet

Deal found 3/25

$215

Tue 5/66:33 amYOW - ORD

Nonstop2h 29mAir Canada

Deal found 3/25

$240

Fri 6/135:55 amYOW - MDW

2 stops16h 43mWestJet

Deal found 3/26

$253

Tue 5/65:15 amYOW - ORD

2 stops14h 11mUnited Airlines

Deal found 3/25

$258

Wed 5/75:55 amYOW - MDW

2 stops13h 50mDelta

Deal found 3/25

$377

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

Thu 5/1

12:35 pm-4:24 pm

1 stop4h 49m

Chicago Midway

Mon 5/5

9:40 am-4:33 pm

1 stop5h 53m

$318

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 5/1

5:55 am-3:05 pm

1 stop10h 10m

Chicago O'Hare Intl

Mon 5/5

12:00 pm-12:22 am

1 stop11h 22m

$363

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 4/18

5:55 am-4:40 pm

1 stop11h 45m

Chicago Midway

Tue 4/22

11:15 am-12:09 am

1 stop11h 54m

$387

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 5/1

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Mon 5/5

7:00 am-1:45 pm

1 stop5h 45m

$414

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 5/1

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Sun 5/4

7:00 am-2:27 pm

1 stop6h 27m

$441

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 5/4

5:55 am-4:10 pm

2 stops11h 15m

Chicago O'Hare Intl

Sun 5/11

6:24 am-12:22 am

2 stops16h 58m

$457

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 5/1

5:55 am-6:20 pm

2 stops13h 25m

Chicago Midway

Mon 5/5

9:20 am-12:22 am

2 stops14h 02m

$694

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 5/1

5:55 am-4:08 pm

2 stops11h 13m

Chicago O'Hare Intl

Mon 5/5

9:30 am-12:22 am

2 stops13h 52m

$694

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 5/30

7:15 pm-9:35 am

2 stops15h 20m

Chicago Midway

Mon 6/2

9:20 am-12:41 am

2 stops14h 21m

$822

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Wed 5/7

10:15 am-4:54 pm

1 stop7h 39m

$174

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 17 results

Compare providers for flights from Ottawa to Chicago

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Chicago in March.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ottawa-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-Chicago flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ottawa-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 28 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, August is the cheapest month in which you can book a flight from Ottawa to Chicago (average of $245). Flying from Ottawa to Chicago in March is currently the most expensive (average of $323). 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?

It’s typically best to fly out from Ottawa to Chicago in the evening. Doing so could potentially save you 49% on the flight price compared to flying in the morning, which is usually more expensive.

Rainfall in Chicago by month

In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

Temperature in Chicago by month

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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Chicago

Get a feel of what it's like to fly with Delta, Porter Airlines and United 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.

Delta

8.0

Very good

7,891 reviews

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

7,891 reviews

Delta

8.0

Very good

7,891 reviews

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

Porter Airlines

7.9

Good

276 reviews

Delta

8.0

Very good

7,891 reviews

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

8,608 reviews

Delta

8.0

Very good

7,891 reviews

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

7,891 reviews

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

8,967 reviews

Delta

8.0

Very good

7,891 reviews

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

What airport do you fly from for flights from Ottawa to Chicago?
Located just 6.6 mi from the city center, Ottawa is the airport most travelers will use when flying to Chicago from Ottawa. Booking flights from Ottawa (YOW) to Chicago should be relatively easy as there are 10 daily outbound flights to Chicago from 3 different airlines.
What are the cheapest airlines flying from Ottawa to Chicago round-trip?
Our cheapest airline available from Ottawa to Chicago is Porter Airlines. Our recent data shows that you can find tickets from as low as $318 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $414 and $441 round-trip. Porter Airlines is currently priced 24% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Ottawa to Chicago one-way?
To fly one-way, consider booking your trip with Porter Airlines, which is currently one of the cheapest options available, starting at $174. WestJet flights start at $215 while deals on Air Canada start at $240 one-way.
What are the most reliable airlines from Ottawa to Chicago?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ottawa to Chicago on time: ANA (81%), GoJet (80%), Avianca (80%).
What are the cheapest flights from Ottawa to Chicago?
Looking for the cheapest flight from Ottawa to Chicago? While on average our users pay $446, our data indicates the cheapest price to be $141. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around $339.
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, August is the cheapest month in which you can book a flight from Ottawa to Chicago (average of $245). Flying from Ottawa to Chicago in March is currently the most expensive (average of $323). 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

Merrillville

New Buffalo

Hammond

Benton Harbor

Porter

Lansing

Valparaiso

Chesterton

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Top 3 airlines flying from Ottawa to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	Cheapest$272	Average$433	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$410	Average$685	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$423	Average$551	FlexibilityNo cancel fee	On-time67%

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$174+ Cheap flights from Ottawa (YOW) to Chicago (CHI)

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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ottawa to Chicago with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Ottawa to Chicago are usually found in April or May, booked 28 days in advance, depart on a Saturday or Wednesday and return on a Friday

Cheap flight deals from Ottawa to Chicago

Most accurate provider

Most trusted provider

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 March 26, 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 March 26, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from Ottawa to Chicago

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Chicago in March.

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 March 21, 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 March 26, 2025.

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

Reviews of airlines servicing Chicago

Get a feel of what it's like to fly with Delta, Porter Airlines and United 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?

Traveling to a place near Ottawa?

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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

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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 March 26, 2025.