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Cheap flights from Ottawa to Illinois from C$ 190

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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
22 abr. — 29 abr.1
1 adult

Cheap flight deals from Ottawa to Illinois

Keep the following information in mind while searching for Ottawa to Illinois flight deals. Data was last updated 17 abril 2025.

Round-trip from

C$ 416

One-way from

C$ 190

Popular in

November

Cheapest in

May

Average price

C$ 548

Good round-trip deal

C$ 590 or less

Good one-way deal

C$ 266 or less
Porter Airlines
  • Porter Airlines
  • 8/6-15/6
  • 2 total stops
  • 11h 12m total
  • Ottawa to Illinois
Search Deals
Porter Airlines
  • Porter Airlines
  • 11/5
  • 1 total stop
  • 4h 59m total
  • Ottawa to Illinois
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Ottawa to Illinois.
Search Deals
Price to beat on a one-way flight from Ottawa to Illinois.
Search Deals

Find flight deals from Ottawa to Illinois

Cheapest flights from Ottawa to Illinois
Explore the most affordable flight options available from Ottawa to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 abril 2025.

dom. 8/612:35 p.m.YOW - MDW
1 stop5h 19mPorter Airlines
dom. 15/69:40 a.m.MDW - YOW
1 stop5h 53mPorter Airlines
Deal found 17/4C$ 416
lun. 12/55:55 a.m.YOW - MDW
1 stop11h 59mMultiple Airlines
sáb. 17/59:40 a.m.MDW - YOW
1 stop7h 33mMultiple Airlines
Deal found 17/4C$ 442
mié. 14/512:00 p.m.YOW - ORD
1 stop20h 27mMultiple Airlines
mié. 21/512:41 p.m.ORD - YOW
1 stop27h 34mMultiple Airlines
Deal found 15/4C$ 476
sáb. 24/53:50 p.m.YOW - STL
1 stop18h 25mMultiple Airlines
sáb. 31/510:10 a.m.STL - YOW
1 stop30h 05mMultiple Airlines
Deal found 17/4C$ 485
dom. 1/66:00 a.m.YOW - ORD
1 stop4h 52mAir Canada
dom. 8/68:25 p.m.ORD - YOW
1 stop4h 09mAir Canada
Deal found 17/4C$ 593
jue. 22/55:25 p.m.YOW - ORD
Nonstop2h 28mUnited Airlines
lun. 26/52:16 p.m.ORD - YOW
Nonstop2h 13mUnited Airlines
Deal found 17/4C$ 616
lun. 2/65:55 a.m.YOW - ORD
2 stops17h 46mWestJet
mié. 4/61:40 p.m.ORD - YOW
1 stop25h 40mWestJet
Deal found 17/4C$ 654
sáb. 24/55:55 a.m.YOW - STL
2 stops11h 42mWestJet
sáb. 31/56:00 a.m.STL - YOW
2 stops17h 22mWestJet
Deal found 17/4C$ 825
lun. 23/62:25 p.m.YOW - STL
1 stop6h 33mAir Canada
vie. 27/61:30 p.m.STL - YOW
1 stop4h 30mAir Canada
Deal found 16/4C$ 826
lun. 23/67:29 p.m.YOW - STL
2 stops17h 51mUnited Airlines
vie. 27/65:00 a.m.STL - YOW
1 stop11h 06mUnited Airlines
Deal found 16/4C$ 868
jue. 22/55:55 a.m.YOW - ORD
2 stops15h 26mDelta
lun. 26/57:25 p.m.ORD - YOW
2 stops27h 57mDelta
Deal found 17/4C$ 1,063
jue. 22/55:55 a.m.YOW - MDW
2 stops13h 50mDelta
lun. 26/59:16 a.m.MDW - YOW
2 stops14h 06mDelta
Deal found 16/4C$ 1,142

Cheapflights Fare Finder

Customize your flight search to find flights from Ottawa to Illinois 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 17 abril 2025.
Use the filters below to find and compare flights from Ottawa to Illinois that are best for you.

Fly from

Ottawa

Fly to

Illinois

Route

Depart

Return

Price

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

dom. 8/6

12:35 p.m.-4:54 p.m.

1 stop5h 19m

Chicago Midway

dom. 15/6

9:40 a.m.-4:33 p.m.

1 stop5h 53m

C$ 416

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

lun. 12/5

5:55 a.m.-4:54 p.m.

1 stop11h 59m

Chicago Midway

sáb. 17/5

9:40 a.m.-6:13 p.m.

1 stop7h 33m

C$ 442

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mié. 14/5

12:00 p.m.-7:27 a.m.

1 stop20h 27m

Chicago O'Hare Intl

mié. 21/5

12:41 p.m.-5:15 p.m.

1 stop27h 34m

C$ 476

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

sáb. 24/5

3:50 p.m.-9:15 a.m.

1 stop18h 25m

Lambert-St Louis

sáb. 31/5

10:10 a.m.-5:15 p.m.

1 stop30h 05m

C$ 485

OttawaChicago

YOW - ORD

YOWORD

Ottawa

dom. 1/6

6:00 a.m.-9:52 a.m.

1 stop4h 52m

Chicago O'Hare Intl

dom. 8/6

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

1 stop4h 09m

C$ 593

OttawaChicago

YOW - ORD

YOWORD

Ottawa

jue. 22/5

5:25 p.m.-6:53 p.m.

Nonstop2h 28m

Chicago O'Hare Intl

lun. 26/5

2:16 p.m.-5:29 p.m.

Nonstop2h 13m

C$ 616

OttawaChicago

YOW - ORD

YOWORD

Ottawa

lun. 2/6

5:55 a.m.-10:41 p.m.

2 stops17h 46m

Chicago O'Hare Intl

mié. 4/6

1:40 p.m.-4:20 p.m.

1 stop25h 40m

C$ 654

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

sáb. 24/5

5:55 a.m.-4:37 p.m.

2 stops11h 42m

Lambert-St Louis

sáb. 31/5

6:00 a.m.-12:22 a.m.

2 stops17h 22m

C$ 825

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

lun. 23/6

2:25 p.m.-7:58 p.m.

1 stop6h 33m

Lambert-St Louis

vie. 27/6

1:30 p.m.-7:00 p.m.

1 stop4h 30m

C$ 826

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

lun. 23/6

7:29 p.m.-12:20 p.m.

2 stops17h 51m

Lambert-St Louis

vie. 27/6

5:00 a.m.-5:06 p.m.

1 stop11h 06m

C$ 868

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/4

Showing 1-10 of 20 results
1
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Best time to book a flight from Ottawa to Illinois

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

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

Currently, January is the cheapest month in which you can book a flight from Ottawa to Illinois (average of C$ 261). Flying from Ottawa to Illinois 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 IL?

Find hourly flight availability from Ottawa to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 abril 2025.

When flying from Ottawa to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Ottawa to Illinois

Explore weekly flight availability from Ottawa to Illinois. 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 17 abril 2025.

The most flights from YOW to USIL are scheduled on a Monday (12 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Illinois by month

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

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

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated 17 abril 2025.
Get a feel of what it's like to fly with Porter Airlines, Delta and United Airlines from Ottawa to Illinois by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
281 reviews
Check prices

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Comfort

8.0

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
281 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Comfort

8.0

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
7,917 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Comfort

8.0

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
8,667 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Comfort

8.0

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
2,809 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Comfort

8.0

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
9,142 reviews
Porter Airlines
8.0
Very good
281 reviews
Check prices

Crew

8.7

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Comfort

8.0

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

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

    Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to Illinois. It is only a 10.6 km journey to Ottawa (YOW) from Ottawa’s city centre.

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

    The cheapest airline one-way is Porter Airlines, with whom users have recently found tickets for as low as C$ 190. However, be on the lookout for offers from Air Canada and United Airlines, as they are both options that can get you from Ottawa to Illinois for a low price.

  • What are the most popular routes from Ottawa to Illinois?

    Most travellers choose Ottawa - Chicago O'Hare Intl, Ottawa - Chicago Midway or Ottawa - Lambert-St Louis when deciding on the best route from Ottawa to Illinois.

  • What are the most reliable airlines from Ottawa to Illinois?

    Before booking your flight to Illinois from Ottawa, check out the most reliable airlines to get you to your destination on time: Avianca (90%), Republic Airways (83%), ANA( 82%).

  • What are the cheapest flights from Ottawa to Illinois?

    Looking for the cheapest flight from Ottawa to Illinois? While on average our users pay C$ 1,522, our data indicates the cheapest price to be C$ 220. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 488.

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

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

  • How can I find direct flights from Ottawa to Illinois?

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

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

    Yes. Cheapflights offers flight deals from Ottawa to Illinois 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 Illinois?

    Currently, January is the cheapest month in which you can book a flight from Ottawa to Illinois (average of C$ 261). Flying from Ottawa to Illinois 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

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Alternative routes for Ottawa to Illinois

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Top 3 airlines flying from Ottawa to Illinois

Discover the top 3 airlines that operate flights from Ottawa to Illinois. 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 17 abril 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 377AverageC$ 540FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 582AverageC$ 728FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 611AverageC$ 790FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find Ottawa to Illinois flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights helps you find that perfect flight to Illinois 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 Illinois with no change fees?

Yes! Cheapflights helps users easily find flights from Ottawa to Illinois with no change fees.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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