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Cheap flights from Ottawa to Illinois from $198

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 9/10. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ottawa to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:55 am - 2:35 pm
YOW
-
ORD
8h 40m
1 stop
Multiple Airlines Logo
3:20 pm - 8:04 pm
ORD
-
YOW
3h 44m
1 stop
$370Multiple Airlines
Wed, Oct 14 - Sun, Oct 18
Multiple Airlines Logo
6:55 am - 2:35 pm
YOW
-
ORD
8h 40m
1 stop
Multiple Airlines Logo
3:20 pm - 8:04 pm
ORD
-
YOW
3h 44m
1 stop
$371Multiple Airlines
Tue, Oct 20 - Fri, Oct 23
United Airlines Logo
6:00 am - 11:00 am
YOW
-
STL
6h 00m
1 stop
United Airlines Logo
5:00 am - 9:16 pm
STL
-
YOW
15h 16m
1 stop
$377United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
6:00 am - 11:00 am
YOW
-
STL
6h 00m
1 stop
United Airlines Logo
5:00 am - 9:16 pm
STL
-
YOW
15h 16m
1 stop
$378United Airlines
Sat, Oct 31 - Wed, Nov 4
Porter Airlines Logo
8:00 am - 2:35 pm
YOW
-
ORD
7h 35m
1 stop
Porter Airlines Logo
11:45 am - 9:44 pm
ORD
-
YOW
8h 59m
1 stop
$378Porter Airlines
Wed, Sep 2 - Fri, Sep 4
American Airlines Logo
8:40 am - 2:20 pm
YOW
-
ORD
6h 40m
1 stop
American Airlines Logo
8:09 am - 2:55 pm
ORD
-
YOW
5h 46m
1 stop
$395American Airlines
Thu, Aug 20 - Sun, Aug 23
Porter Airlines Logo
8:00 am - 2:35 pm
YOW
-
MDW
7h 35m
1 stop
Porter Airlines Logo
10:25 am - 8:04 pm
MDW
-
YOW
8h 39m
1 stop
$409Porter Airlines
Fri, Jul 24 - Sun, Jul 26
American Airlines Logo
7:00 am - 12:44 pm
YOW
-
ORD
6h 44m
1 stop
American Airlines Logo
2:38 pm - 9:35 pm
ORD
-
YOW
5h 57m
1 stop
$416American Airlines
Tue, Jul 21 - Tue, Jul 28
Air Canada Logo
9:05 am - 6:42 pm
YOW
-
STL
10h 37m
1 stop
Air Canada Logo
2:40 pm - 9:15 pm
STL
-
YOW
5h 35m
1 stop
$439Air Canada
Tue, Jul 28 - Wed, Aug 26
Air Canada Logo
9:55 am - 9:13 pm
YOW
-
STL
12h 18m
2 stops
Air Canada Logo
1:08 pm - 9:50 pm
STL
-
YOW
7h 42m
2 stops
$445Air Canada
Sat, Oct 31 - Wed, Nov 4

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American Airlines flights from Ottawa to Illinois

Our best American Airlines deals on Ottawa to Illinois flight tickets
American Airlines
Aug 20
YOW8:40 amOttawa
6h 40m
1 stop
ORD2:20 pmChicago O'Hare Intl
Aug 23
ORD8:09 amChicago O'Hare Intl
5h 46m
1 stop
YOW2:55 pmOttawa
$395
American Airlines
Jul 21
YOW7:00 amOttawa
6h 44m
1 stop
ORD12:44 pmChicago O'Hare Intl
Jul 28
ORD2:38 pmChicago O'Hare Intl
5h 57m
1 stop
YOW9:35 pmOttawa
$416
American Airlines
Oct 20
YOW8:40 amOttawa
6h 40m
1 stop
ORD2:20 pmChicago O'Hare Intl
Oct 23
ORD8:06 amChicago O'Hare Intl
5h 49m
1 stop
YOW2:55 pmOttawa
$417

Porter Airlines flights from Ottawa to Illinois

Our best Porter Airlines deals on Ottawa to Illinois flight tickets
Porter Airlines
Sep 2
YOW8:00 amOttawa
7h 35m
1 stop
ORD2:35 pmChicago O'Hare Intl
Sep 4
ORD11:45 amChicago O'Hare Intl
8h 59m
1 stop
YOW9:44 pmOttawa
$378
Porter Airlines
Jul 24
YOW8:00 amOttawa
7h 35m
1 stop
MDW2:35 pmChicago Midway
Jul 26
MDW10:25 amChicago Midway
8h 39m
1 stop
YOW8:04 pmOttawa
$409
Porter Airlines
Jul 26
YOW8:50 pmOttawa
18h 45m
1 stop
MDW2:35 pmChicago Midway
Jul 29
MDW3:20 pmChicago Midway
3h 44m
1 stop
YOW8:04 pmOttawa
$427

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 July 6, 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

Cheapest round-trip
Quickest round-trip

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 10/14

6:55 am-2:35 pm

1 stop8h 40m

Chicago O'Hare Intl

Sun 10/18

3:20 pm-8:04 pm

1 stop3h 44m

$370

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 10/20

6:55 am-2:35 pm

1 stop8h 40m

Chicago O'Hare Intl

Fri 10/23

3:20 pm-8:04 pm

1 stop3h 44m

$371

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 10/31

6:00 am-11:00 am

1 stop6h 00m

Lambert-St Louis

Wed 11/4

5:00 am-9:16 pm

1 stop15h 16m

$377

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 10/31

6:00 am-11:00 am

1 stop6h 00m

Lambert-St Louis

Wed 11/4

5:00 am-9:16 pm

1 stop15h 16m

$378

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 9/2

8:00 am-2:35 pm

1 stop7h 35m

Chicago O'Hare Intl

Fri 9/4

11:45 am-9:44 pm

1 stop8h 59m

$378

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 8/20

8:40 am-2:20 pm

1 stop6h 40m

Chicago O'Hare Intl

Sun 8/23

8:09 am-2:55 pm

1 stop5h 46m

$395

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 7/24

8:00 am-2:35 pm

1 stop7h 35m

Chicago Midway

Sun 7/26

10:25 am-8:04 pm

1 stop8h 39m

$409

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 7/21

7:00 am-12:44 pm

1 stop6h 44m

Chicago O'Hare Intl

Tue 7/28

2:38 pm-9:35 pm

1 stop5h 57m

$416

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 7/28

9:05 am-6:42 pm

1 stop10h 37m

Lambert-St Louis

Wed 8/26

2:40 pm-9:15 pm

1 stop5h 35m

$439

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 10/31

9:55 am-9:13 pm

2 stops12h 18m

Lambert-St Louis

Wed 11/4

1:08 pm-9:50 pm

2 stops7h 42m

$445

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 August. Flight prices, which tend to average around $131, 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 August, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $213.

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

The cheapest day to depart from Ottawa to Illinois is on a Tuesday when prices can be found for as low as $514. Flights from Ottawa to Illinois on a Monday will generally be more expensive and average around $704. 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 $543. Flights in the morning are often more expensive with an average ticket price of $624.

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?

You could potentially save up to 36% on your flight if you consider stops on a Ottawa to Illinois flight.

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

$288

Fastest flight time

2h 20m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Ottawa in the past 72 hours is $288. The best round-trip flight deal from Ottawa to Illinois found on momondo in the last 72 hours is $545.
The fastest flight from Ottawa to Illinois takes 2h 20m
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

Frequently asked questions about flying from Ottawa to Illinois

  • 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
United AirlinesPriceFrom $324Free CancellationRating
7.4
9,938 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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