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Cheap flights from Ottawa to Illinois from C$ 274

YOW — ORD
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ottawa to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to Illinois

Sat 21/1112:40 p.m. -
1 stop6h 00m
Mon 23/1112:15 p.m. -
1 stop4h 57m
Deal found 25/10C$ 515
Wed 25/1112:15 p.m. -
1 stop6h 25m
Wed 2/1212:15 p.m. -
1 stop4h 58m
Deal found 28/10C$ 540
Fri 20/118:25 a.m. -
1 stop4h 10m
Sun 22/1112:15 p.m. -
1 stop4h 57m
Deal found 23/10C$ 543
Tue 24/1112:15 p.m. -
1 stop6h 25m
Tue 1/1212:15 p.m. -
1 stop4h 58m
Deal found 27/10C$ 556
Sat 21/1110:15 a.m. -
2 stops15h 28m
Mon 23/116:20 p.m. -
1 stop12h 37m
Deal found 23/10C$ 558
Thu 26/118:25 a.m. -
1 stop4h 10m
Sun 29/1112:15 p.m. -
1 stop4h 57m
Deal found 23/10C$ 560
Wed 9/123:15 p.m. -
2 stops17h 05m
Wed 16/126:20 p.m. -
1 stop16h 13m
Deal found 25/10C$ 561
Wed 9/123:15 p.m. -
2 stops17h 05m
Fri 11/126:20 p.m. -
1 stop24h 48m
Deal found 25/10C$ 563
Fri 11/123:15 p.m. -
2 stops21h 18m
Fri 18/128:35 p.m. -
1 stop26h 32m
Deal found 27/10C$ 829
Thu 17/128:00 a.m. -
1 stop12h 30m
Sun 20/128:35 p.m. -
1 stop16h 55m
Deal found 24/10C$ 877
Sat 24/1010:40 a.m. -
1 stop4h 55m
Sat 31/107:25 a.m. -
2 stops33h 20m
Deal found 23/10C$ 1,054
Sun 1/113:30 p.m. -
3 stops20h 55m
Sun 22/111:16 p.m. -
3 stops21h 16m
Deal found 25/10C$ 1,159

Find flight deals from Ottawa to Illinois

Round-trip from

C$ 515

One-way from

C$ 274

Popular in

January

Cheapest in

February

Average price

C$ 1,136

Good round-trip deal

C$ 875 or less

Good one-way deal

C$ 494 or less
Porter Airlines
  • Porter Airlines
  • 21/11-23/11
  • 2 total stops
  • 10h 57m total
  • Ottawa to Illinois
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5/12-31/12
  • 5/12-31/12
  • 2 total stops
  • 30h 02m total
  • Ottawa to Illinois
Search Deals
High demand for flights, 11% potential price rise
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Cheapest flight prices on average. 4% potential price decrease (C$ 51 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Ottawa to Illinois.
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Price to beat on a one-way flight from Ottawa to Illinois.
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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Sat 5/12

4:40 p.m.-9:42 p.m.

2 stops30h 02m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 274

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Sat 30/1

10:35 a.m.-11:50 a.m.

2 stops26h 15m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 299

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Thu 10/12

12:15 p.m.-5:40 p.m.

1 stop6h 25m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 314

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Sat 5/12

4:40 p.m.-5:16 p.m.

3 stops49h 36m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 334

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Fri 29/1

5:40 p.m.-11:46 p.m.

3 stops31h 06m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 341
Quickest round-trip

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Sat 5/12

12:40 p.m.-5:40 p.m.

1 stop6h 00m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 348

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Thu 10/12

3:15 p.m.-7:20 a.m.

2 stops17h 05m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 361

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Wed 9/12

3:15 p.m.-4:06 p.m.

2 stops25h 51m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 362

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Fri 29/1

2:10 p.m.-12:56 a.m.

1 stop11h 46m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 375

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Mon 14/12

12:15 p.m.-2:30 p.m.

3 stops27h 15m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 379

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/10

Showing 1-10 of 36 resultsSorted by cheapest first
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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

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, March is the cheapest month in which you can book a flight from Ottawa to Illinois (average of C$ 570). Flying from Ottawa to Illinois in January is currently the most expensive (average of C$ 1,131). 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?

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.

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

Airfare is below average for this route at the moment.
Ottawa to Illinois flights typically cost between C$ 777 and C$ 962 in November.
The cheapest round-trip price found within the last 5 days was C$ 515 on Porter Airlines (21 Nov-23 Nov).

Reviews of airlines servicing Illinois

Read reviews from past customers who have flown Porter Airlines,United Airlines, andAir Canada from Ottawa to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
467 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

6.9

Food

7.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Porter Airlines
8.0
Very good
467 reviews
Porter Airlines
8.0
Very good
467 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

6.9

Food

7.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
United Airlines
7.3
Good
10,443 reviews
Porter Airlines
8.0
Very good
467 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

6.9

Food

7.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Air Canada
7.1
Good
11,823 reviews
Porter Airlines
8.0
Very good
467 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

6.9

Food

7.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
American Airlines
7.0
Good
12,201 reviews
Porter Airlines
8.0
Very good
467 reviews
Check prices

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

6.9

Food

7.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.

Related info for your journey

  • 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.

  • How long is the flight from Ottawa to Illinois?

    Porter Airlines and WestJet can get you from Ottawa to Illinois in just under 6h 25m. Your travel time can differ by up to 2h 06m. There are 1051 km between Ottawa and Illinois. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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: ANA (85%), United Airlines (84%), Air Canada( 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$ 2,071, our data indicates the cheapest price to be C$ 342. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 551.

  • 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, March is the cheapest month in which you can book a flight from Ottawa to Illinois (average of C$ 570). Flying from Ottawa to Illinois in January is currently the most expensive (average of C$ 1,131). 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

Alternative routes for Ottawa to Illinois

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Toronto Island to Boston flights
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Hamilton to Orlando flights
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Top airline flying from Ottawa to Illinois

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 828AverageC$ 1,026FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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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?

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

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