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 $307 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $421 and $487 round-trip. Porter Airlines is currently priced 26% 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 $191. Air Canada flights start at $231 while deals on United Airlines start at $263 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 $680, our data indicates the cheapest price to be $178. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around $365.

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: Avianca (90%), Republic Airways (83%), ANA (82%).

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 41 days in advance, which can save you up to 79% on flights from Ottawa to Chicago compared to booking the week you need them. Waiting 41 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 $434. For sooner than that we have options available in the next 3 days from $589.

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

May is one of the best times of the year to fly to Chicago from Ottawa. Prices for May average $420 per person but you can even find prices for as low as $220. The most expensive prices can be found in the month of November. Opting for a May 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 eDreams the most. eDreams 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 12 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.

$185+ Flights from Ottawa to Chicago - Compare & Save Big

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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 May or April, booked 65 days in advance, depart on a Saturday or Friday and return on a Friday

Cheap flight deals from Ottawa to Chicago

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$307 (Kiwi.com)
One-way from	$185 (Kiwi.com)
Popular in	November
Cheapest in	May
Average price	$351
Good round-trip deal	$390 or less
Good one-way deal	$245 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 ($28 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 May 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 May 1, 2025.

Fri 6/612:35 pmYOW - MDW

1 stop5h 19mPorter Airlines

Sun 6/229:40 amMDW - YOW

1 stop5h 53mPorter Airlines

Deal found 4/30

$307

Thu 6/55:55 amYOW - MDW

1 stop11h 29mMultiple Airlines

Sun 6/89:40 amMDW - YOW

1 stop13h 42mMultiple Airlines

Deal found 4/30

$322

Wed 5/2811:15 amYOW - ORD

1 stop9h 52mMultiple Airlines

Wed 6/45:51 amORD - YOW

1 stop8h 05mMultiple Airlines

Deal found 4/30

$326

Thu 6/195:25 pmYOW - ORD

Nonstop2h 28mAir Canada

Mon 6/236:15 pmORD - YOW

Nonstop2h 20mAir Canada

Deal found 4/29

$421

Fri 5/307:29 pmYOW - ORD

1 stop13h 33mUnited Airlines

Fri 6/69:31 pmORD - YOW

1 stop11h 27mUnited Airlines

Deal found 4/30

$492

Sat 6/73:45 pmYOW - ORD

1 stop25h 59mWestJet

Tue 6/105:30 pmORD - YOW

2 stops21h 50mWestJet

Deal found 4/30

$583

Fri 7/255:55 amYOW - ORD

2 stops11h 23mDelta

Tue 7/299:00 amORD - YOW

2 stops14h 22mDelta

Deal found 4/30

$617

Tue 6/245:55 amYOW - MDW

2 stops13h 46mDelta

Fri 6/2712:44 pmMDW - YOW

2 stops10h 38mDelta

Deal found 4/30

$713

Thu 6/197:15 pmYOW - MDW

2 stops15h 26mWestJet

Mon 6/239:21 amMDW - YOW

2 stops14h 20mWestJet

Deal found 4/29

$877

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 May 1, 2025.

Fri 6/612:35 pmYOW - MDW

1 stop5h 19mPorter Airlines

Sun 6/229:40 amMDW - YOW

1 stop5h 53mPorter Airlines

Deal found 4/30

$307

Thu 6/55:55 amYOW - MDW

1 stop11h 29mMultiple Airlines

Sun 6/89:40 amMDW - YOW

1 stop13h 42mMultiple Airlines

Deal found 4/30

$322

Thu 6/195:25 pmYOW - ORD

Nonstop2h 28mAir Canada

Mon 6/236:15 pmORD - YOW

Nonstop2h 20mAir Canada

Deal found 4/29

$421

Thu 7/316:33 amYOW - ORD

Nonstop2h 22mUnited Airlines

Mon 8/46:15 pmORD - YOW

Nonstop2h 20mUnited Airlines

Deal found 4/30

$487

Sat 6/73:45 pmYOW - ORD

1 stop25h 59mWestJet

Tue 6/105:30 pmORD - YOW

2 stops21h 50mWestJet

Deal found 4/30

$583

Fri 7/255:55 amYOW - ORD

2 stops11h 23mDelta

Tue 7/299:00 amORD - YOW

2 stops14h 22mDelta

Deal found 4/30

$617

Wed 5/2811:15 amYOW - ORD

1 stop9h 52mMultiple Airlines

Wed 6/45:51 amORD - YOW

1 stop8h 05mMultiple Airlines

Deal found 4/30

$326

Sat 7/55:55 amYOW - MDW

2 stops13h 46mDelta

Tue 7/89:25 amMDW - YOW

2 stops13h 57mDelta

Deal found 4/29

$635

Fri 5/237:15 pmYOW - MDW

2 stops15h 25mWestJet

Sat 5/2412:48 pmMDW - YOW

2 stops15h 37mWestJet

Deal found 4/29

$871

Last-minute flights from Ottawa to Chicago
Discover last-minute flight deals from Ottawa to Chicago. Data last updated May 1, 2025 and is based on user searches.

Wed 5/710:15 amYOW - MDW

1 stop7h 39mPorter Airlines

Wed 5/149:40 amMDW - YOW

1 stop5h 53mPorter Airlines

Deal found 4/29

$374

Wed 5/74:25 pmYOW - ORD

2 stops17h 30mMultiple Airlines

Wed 5/147:47 amORD - YOW

1 stop8h 19mMultiple Airlines

Deal found 4/29

$434

Wed 5/76:33 amYOW - ORD

Nonstop2h 29mAir Canada

Wed 5/148:40 amORD - YOW

1 stop4h 10mAir Canada

Deal found 4/29

$612

Wed 5/76:00 amYOW - ORD

2 stops31h 48mWestJet

Wed 5/1410:31 amORD - YOW

2 stops19h 14mWestJet

Deal found 4/29

$877

Mon 5/1212:20 pmYOW - MDW

2 stops25h 55mWestJet

Fri 5/169:20 amMDW - YOW

2 stops14h 22mWestJet

Deal found 4/30

$878

Wed 5/1412:35 pmYOW - MDW

1 stop5h 19mPorter Airlines

Mon 5/269:40 amMDW - YOW

1 stop5h 53mPorter Airlines

Deal found 4/30

$347

Fri 5/165:55 amYOW - ORD

2 stops32h 09mWestJet

Sun 5/189:00 amORD - YOW

2 stops14h 22mWestJet

Deal found 4/30

$643

Sat 5/245:55 amYOW - MDW

2 stops13h 50mDelta

Mon 5/269:16 amMDW - YOW

2 stops14h 06mDelta

Deal found 4/30

$983

Wed 5/2811:15 amYOW - ORD

1 stop9h 52mMultiple Airlines

Wed 6/45:51 amORD - YOW

1 stop8h 05mMultiple Airlines

Deal found 4/30

$326

Wed 5/285:55 amYOW - MDW

1 stop11h 59mMultiple Airlines

Wed 6/49:40 amMDW - YOW

1 stop5h 53mMultiple Airlines

Deal found 4/30

$340

Wed 5/282:35 pmYOW - ORD

1 stop4h 46mAir Canada

Wed 6/410:56 amORD - YOW

Nonstop2h 08mAir Canada

Deal found 4/30

$437

Fri 5/305:25 pmYOW - ORD

Nonstop2h 28mUnited Airlines

Fri 6/69:31 pmORD - YOW

1 stop11h 27mUnited Airlines

Deal found 4/30

$487

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 May 1, 2025.

Wed 7/95:55 amYOW - MDW

1 stop11h 29mMultiple Airlines

Deal found 4/28

$185

Fri 6/1312:35 pmYOW - MDW

1 stop5h 19mPorter Airlines

Deal found 4/30

$191

Tue 6/1011:00 amYOW - ORD

1 stop20h 32mMultiple Airlines

Deal found 4/30

$204

Tue 6/105:25 pmYOW - ORD

Nonstop2h 28mAir Canada

Deal found 4/30

$231

Tue 7/156:33 amYOW - ORD

Nonstop2h 22mUnited Airlines

Deal found 4/30

$263

Tue 7/155:55 amYOW - MDW

2 stops13h 45mDelta

Deal found 4/30

$464

Fri 5/166:00 amYOW - MDW

2 stops28h 40mWestJet

Deal found 4/29

$466

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 6/6

12:35 pm-4:54 pm

1 stop5h 19m

Chicago Midway

Sun 6/22

9:40 am-4:33 pm

1 stop5h 53m

$307

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 6/5

5:55 am-4:24 pm

1 stop11h 29m

Chicago Midway

Sun 6/8

9:40 am-12:22 am

1 stop13h 42m

$322

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 5/28

11:15 am-8:07 pm

1 stop9h 52m

Chicago O'Hare Intl

Wed 6/4

5:51 am-2:56 pm

1 stop8h 05m

$326

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 6/19

5:25 pm-6:53 pm

Nonstop2h 28m

Chicago O'Hare Intl

Mon 6/23

6:15 pm-9:35 pm

Nonstop2h 20m

$421

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 6/13

5:25 pm-6:53 pm

Nonstop2h 28m

Chicago O'Hare Intl

Fri 6/20

10:56 am-2:04 pm

Nonstop2h 08m

$477

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 5/30

5:55 am-10:41 pm

2 stops17h 46m

Chicago O'Hare Intl

Sun 6/29

1:40 pm-5:25 am

1 stop14h 45m

$556

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 7/12

5:55 am-12:50 pm

2 stops7h 55m

Chicago O'Hare Intl

Tue 7/15

9:00 am-12:22 am

2 stops14h 22m

$585

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sat 7/5

5:55 am-6:41 pm

2 stops13h 46m

Chicago Midway

Tue 7/8

9:25 am-12:22 am

2 stops13h 57m

$635

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 5/23

7:15 pm-9:40 am

2 stops15h 25m

Chicago Midway

Sat 5/24

12:48 pm-5:25 am

2 stops15h 37m

$871

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Wed 7/9

5:55 am-4:24 pm

1 stop11h 29m

$185

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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 May.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy2 stars	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 eDreams the most. eDreams 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 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, 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 $321). 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.

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).

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 Porter Airlines, Delta 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.

Porter Airlines

8.0

Very good

285 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Porter Airlines

8.0

Very good

285 reviews

Porter Airlines

8.0

Very good

285 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Delta

8.0

Very good

7,934 reviews

Porter Airlines

8.0

Very good

285 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

United Airlines

7.4

Good

8,696 reviews

Porter Airlines

8.0

Very good

285 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

WestJet

7.2

Good

2,826 reviews

Porter Airlines

8.0

Very good

285 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Air Canada

7.0

Good

9,252 reviews

Porter Airlines

8.0

Very good

285 reviews

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

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 12 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 $307 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $421 and $487 round-trip. Porter Airlines is currently priced 26% 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 $191. Air Canada flights start at $231 while deals on United Airlines start at $263 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: Avianca (90%), Republic Airways (83%), ANA (82%).
What are the cheapest flights from Ottawa to Chicago?
Looking for the cheapest flight from Ottawa to Chicago? While on average our users pay $680, our data indicates the cheapest price to be $178. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around $365.
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 $321). 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

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$291	Average$372	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$410	Average$606	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$423	Average$553	FlexibilityNo cancel fee	On-time67%

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$185+ 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 7/9. 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 May or April, booked 65 days in advance, depart on a Saturday or Friday 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 May 1, 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 May 1, 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 May.

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 April 25, 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 May 1, 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 May 1, 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 insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated May 1, 2025.

Get a feel of what it's like to fly with Porter Airlines, Delta 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 May 1, 2025.