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Cheap flights from Ottawa to Illinois from $161

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Illinois departing on 3/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ottawa to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:00 am - 12:40 am
YOW
-
ORD
14h 40m
2 stops
Multiple Airlines Logo
6:01 pm - 5:25 pm
ORD
-
YOW
22h 24m
1 stop
$291Multiple Airlines
mar., mar. 10 - mar., mar. 17
Multiple Airlines Logo
3:55 pm - 12:40 am
YOW
-
ORD
9h 45m
1 stop
Multiple Airlines Logo
6:01 pm - 5:25 pm
ORD
-
YOW
22h 24m
1 stop
$292Multiple Airlines
mar., mar. 10 - mar., mar. 17
United Airlines Logo
5:48 pm - 11:59 pm
YOW
-
STL
7h 11m
1 stop
United Airlines Logo
7:00 am - 1:34 pm
STL
-
YOW
5h 34m
1 stop
$301United Airlines
lun., feb. 23 - mié., feb. 25
Multiple Airlines Logo
3:35 pm - 12:22 am
YOW
-
ORD
9h 47m
2 stops
Multiple Airlines Logo
6:01 pm - 5:25 pm
ORD
-
YOW
22h 24m
1 stop
$311Multiple Airlines
mié., mar. 25 - mié., abr. 1
Multiple Airlines Logo
3:55 pm - 12:22 am
YOW
-
ORD
9h 27m
1 stop
Multiple Airlines Logo
6:01 pm - 5:25 pm
ORD
-
YOW
22h 24m
1 stop
$312Multiple Airlines
mié., mar. 25 - mié., abr. 1
Multiple Airlines Logo
3:35 pm - 12:22 am
YOW
-
ORD
9h 47m
2 stops
Multiple Airlines Logo
6:01 pm - 5:25 pm
ORD
-
YOW
22h 24m
1 stop
$313Multiple Airlines
sáb., mar. 21 - mar., mar. 24
United Airlines Logo
10:44 am - 9:08 pm
YOW
-
STL
11h 24m
1 stop
United Airlines Logo
7:45 am - 5:07 pm
STL
-
YOW
8h 22m
1 stop
$316United Airlines
jue., abr. 9 - sáb., abr. 11
Air Canada Logo
7:15 am - 3:29 pm
YOW
-
STL
9h 14m
1 stop
Air Canada Logo
4:05 pm - 11:18 pm
STL
-
YOW
6h 13m
1 stop
$367Air Canada
dom., mar. 1 - mié., mar. 4
American Airlines Logo
6:40 am - 2:26 pm
YOW
-
BMI
8h 46m
2 stops
American Airlines Logo
2:56 pm - 12:43 am
BMI
-
YOW
8h 47m
2 stops
$769American Airlines
vie., feb. 20 - lun., feb. 23
WestJet Logo
5:40 am - 2:51 pm
YOW
-
BMI
34h 11m
2 stops
WestJet Logo
3:36 pm - 12:39 am
BMI
-
YOW
32h 03m
2 stops
$1,020WestJet
mar., feb. 24 - sáb., feb. 28

WestJet flights from Ottawa to Illinois

Our best WestJet deals on Ottawa to Illinois flight tickets
WestJet
Apr 9
YOW5:45 pmOttawa
20h 50m
1 stop
ORD1:35 pmChicago O'Hare Intl
May 8
ORD5:30 pmChicago O'Hare Intl
11h 10m
1 stop
YOW5:40 amOttawa
$423
WestJet
Apr 9
YOW5:45 pmOttawa
20h 50m
1 stop
ORD1:35 pmChicago O'Hare Intl
May 8
ORD5:30 pmChicago O'Hare Intl
18h 00m
2 stops
YOW12:30 pmOttawa
$431
WestJet
Apr 18
YOW5:40 amOttawa
14h 43m
2 stops
ORD7:23 pmChicago O'Hare Intl
Apr 20
ORD11:19 amChicago O'Hare Intl
12h 20m
2 stops
YOW12:39 amOttawa
$436

American Airlines flights from Ottawa to Illinois

Our best American Airlines deals on Ottawa to Illinois flight tickets
American Airlines
Apr 9
YOW6:45 amOttawa
10h 56m
2 stops
STL4:41 pmLambert-St Louis
Apr 11
STL5:21 pmLambert-St Louis
24h 05m
2 stops
YOW6:26 pmOttawa
$467
American Airlines
Mar 27
YOW6:45 amOttawa
17h 50m
2 stops
STL11:35 pmLambert-St Louis
Mar 30
STL3:33 pmLambert-St Louis
24h 15m
2 stops
YOW4:48 pmOttawa
$553
American Airlines
Feb 20
YOW6:40 amOttawa
8h 46m
2 stops
BMI2:26 pmBloomington-Normal
Feb 23
BMI2:56 pmBloomington-Normal
8h 47m
2 stops
YOW12:43 amOttawa
$769

momondo 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, momondo users made 832,500 searches. Data last updated febrero 9, 2026.
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

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mar. 3/10

11:00 am-12:40 am

2 stops14h 40m

Chicago O'Hare Intl

mar. 3/17

6:01 pm-5:25 pm

1 stop22h 24m

$291

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mar. 3/10

3:55 pm-12:40 am

1 stop9h 45m

Chicago O'Hare Intl

mar. 3/17

6:01 pm-5:25 pm

1 stop22h 24m

$292

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

lun. 2/23

5:48 pm-11:59 pm

1 stop7h 11m

Lambert-St Louis

mié. 2/25

7:00 am-1:34 pm

1 stop5h 34m

$301

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mié. 3/25

3:35 pm-12:22 am

2 stops9h 47m

Chicago O'Hare Intl

mié. 4/1

6:01 pm-5:25 pm

1 stop22h 24m

$311

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mié. 3/25

3:55 pm-12:22 am

1 stop9h 27m

Chicago O'Hare Intl

mié. 4/1

6:01 pm-5:25 pm

1 stop22h 24m

$312

OttawaChicago

YOW - ORD

YOWORD

Ottawa

sáb. 3/21

3:35 pm-12:22 am

2 stops9h 47m

Chicago O'Hare Intl

mar. 3/24

6:01 pm-5:25 pm

1 stop22h 24m

$313

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

jue. 4/9

10:44 am-9:08 pm

1 stop11h 24m

Lambert-St Louis

sáb. 4/11

7:45 am-5:07 pm

1 stop8h 22m

$316

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

dom. 3/1

7:15 am-3:29 pm

1 stop9h 14m

Lambert-St Louis

mié. 3/4

4:05 pm-11:18 pm

1 stop6h 13m

$367

OttawaBloomington

YOW - BMI

YOWBMI

Ottawa

vie. 2/20

6:40 am-2:26 pm

2 stops8h 46m

Bloomington-Normal

lun. 2/23

2:56 pm-12:43 am

2 stops8h 47m

$769

OttawaBloomington

YOW - BMI

YOWBMI

Ottawa

mar. 2/24

5:40 am-2:51 pm

2 stops34h 11m

Bloomington-Normal

sáb. 2/28

3:36 pm-12:39 am

2 stops32h 03m

$1,020

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Ottawa to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Ottawa is in May. Flight prices, which tend to average around $288, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of May, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $356.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Ottawa to Illinois is on a Saturday when prices can be found for as low as $545. Flights from Ottawa to Illinois on a Monday will generally be more expensive and average around $692. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Ottawa to Illinois during this time can be as low as $551. Flights in the morning are often more expensive with an average ticket price of $629.

What is the cheapest Ottawa to Illinois flight route?

Fly from Ottawa to Chicago O'Hare Intl for the best Ottawa - Illinois flight prices

What cabin class options are available on Ottawa to Illinois flights?

There are 4 cabin classes available to choose from on Ottawa to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ottawa to Illinois flights?

No. A direct flight is the cheapest option for a flight between Ottawa to Illinois.

Cheap Ottawa to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to Illinois

Best Price Found

$188

Fastest flight time

2h 08m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Ottawa in the past 72 hours is $188. The best round-trip flight deal from Ottawa to Illinois found on momondo in the last 72 hours is $406.
The fastest flight from Ottawa to Illinois takes 2h 08m
Direct flights go from Ottawa to Illinois every day.
There are 98 airports in Illinois. From Ottawa there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

  • When did momondo last update prices for flights from Ottawa Airport to Illinois?

    Prices for flights from Ottawa Airport to Illinois were last updated today.

  • How many operators does momondo search for flights from Ottawa Airport to Illinois?

  • How old do you have to be to fly from Ottawa Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ottawa Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Ottawa to Illinois?

Best airlines flying from Ottawa to Illinois

Compare and see reviews for airlines that fly from Ottawa to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $306Free CancellationRating
7.1
10,701 reviews
Search Air Canada flights
United AirlinesPriceFrom $324Free CancellationRating
7.4
9,267 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ottawa to Illinois for you.

Can I find flights from Ottawa to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ottawa to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Ottawa to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from Ottawa. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ottawa to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Ottawa. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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