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Cheap flights from Ottawa to Illinois from C$ 259

YOW — ORD
9 Oct — 16 Oct1
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 3/106:55 a.m. -
1 stop8h 40m
Sun 4/1011:45 a.m. -
1 stop11h 35m
Deal found 6/9C$ 445
Sun 11/107:20 a.m. -
1 stop10h 20m
Thu 15/105:30 p.m. -
1 stop11h 05m
Deal found 8/9C$ 451
Sat 17/106:55 a.m. -
1 stop8h 40m
Sun 18/103:20 p.m. -
1 stop8h 00m
Deal found 4/9C$ 461
Fri 23/107:20 a.m. -
1 stop10h 20m
Wed 28/106:20 p.m. -
1 stop17h 54m
Deal found 6/9C$ 483
Wed 25/115:30 a.m. -
1 stop13h 10m
Fri 27/1112:20 p.m. -
1 stop11h 24m
Deal found 6/9C$ 487
Thu 12/115:30 a.m. -
1 stop13h 10m
Mon 16/1112:20 p.m. -
1 stop11h 24m
Deal found 5/9C$ 494
Sat 14/115:30 a.m. -
1 stop13h 10m
Sun 15/116:20 p.m. -
1 stop16h 14m
Deal found 4/9C$ 508
Thu 12/115:30 a.m. -
1 stop13h 10m
Sun 15/116:20 p.m. -
1 stop12h 39m
Deal found 5/9C$ 514
Sat 3/106:55 a.m. -
1 stop7h 28m
Sun 4/109:55 a.m. -
1 stop13h 25m
Deal found 6/9C$ 525
Sat 17/106:01 p.m. -
1 stop6h 20m
Sun 18/1010:40 a.m. -
Nonstop2h 19m
Deal found 4/9C$ 531
Sat 7/1112:40 p.m. -
1 stop6h 00m
Mon 9/1112:20 p.m. -
1 stop4h 54m
Deal found 7/9C$ 539
Tue 20/107:00 a.m. -
1 stop6h 45m
Fri 23/108:06 a.m. -
1 stop5h 49m
Deal found 5/9C$ 541

Find flight deals from Ottawa to Illinois

Round-trip from

C$ 445

One-way from

C$ 259

Popular in

January

Cheapest in

February

Average price

C$ 604

Good round-trip deal

C$ 748 or less

Good one-way deal

C$ 383 or less
3/10-4/10
  • 3/10-4/10
  • 2 total stops
  • 20h 15m total
  • Ottawa to Illinois
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WestJet
  • WestJet
  • 23/10-31/12
  • 1 total stop
  • 10h 20m total
  • Ottawa to Illinois
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 54 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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 - MDW Chicago Midway

YOWMDW

Ottawa

Mon 19/10

6:50 a.m.-2:35 p.m.

1 stop8h 45m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 288

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Sun 4/10

6:25 p.m.-11:00 a.m.

1 stop17h 35m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 290

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Mon 19/10

7:15 a.m.-12:31 a.m.

2 stops18h 16m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 346

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Thu 1/10

8:00 a.m.-11:00 a.m.

1 stop4h 00m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 348

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Tue 6/10

8:00 a.m.-11:00 a.m.

1 stop4h 00m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 350

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Tue 6/10

7:00 a.m.-3:20 p.m.

2 stops33h 20m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 357

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Sat 17/10

3:30 p.m.-2:35 p.m.

1 stop24h 05m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 361

OttawaChicago

YOW Ottawa - MDW Chicago Midway

YOWMDW

Ottawa

Fri 23/10

10:40 a.m.-2:35 p.m.

1 stop4h 55m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 370

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Tue 6/10

7:00 a.m.-12:45 p.m.

1 stop6h 45m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 379

OttawaChicago

YOW Ottawa - ORD Chicago O'Hare Intl

YOWORD

Ottawa

Wed 23/9

2:10 p.m.-9:20 a.m.

2 stops20h 10m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 389

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 51 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$ 560). Flying from Ottawa to Illinois in January is currently the most expensive (average of C$ 1,112). 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.

Weekly flight availability from Ottawa to Illinois

The most flights from YOW to USIL are scheduled on a Tuesday (13 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (8 on average).

Reviews of airlines servicing Illinois

Read reviews from past customers who have flown Porter Airlines,United Airlines, andAmerican Airlines 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
458 reviews
Check prices

Food

7.6

Overall

8.0

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

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
458 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Food

7.6

Overall

8.0

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

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
7.4
Good
10,190 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Food

7.6

Overall

8.0

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

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
7.1
Good
12,046 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Food

7.6

Overall

8.0

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

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
11,603 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Food

7.6

Overall

8.0

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

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 Air Canada can get you from Ottawa to Illinois in just under 4h 51m. Your travel time can differ by up to 1h 09m. There are 1413 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: Avianca (82%), ANA (80%), Air Canada( 72%).

  • 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$ 1,586, our data indicates the cheapest price to be C$ 260. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around C$ 487.

  • 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$ 560). Flying from Ottawa to Illinois in January is currently the most expensive (average of C$ 1,112). 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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Top 2 airlines flying from Ottawa to Illinois

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 414AverageC$ 978FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 469AverageC$ 765FlexibilityNo cancel feeOn-time69%
Search United Airlines 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?

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.

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