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Cheap flights from Ottawa to Illinois from $171

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 9/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ottawa to Illinois

Cheap round-trip flights

Porter Airlines Logo
7:00 am - 9:50 amYOW-MDW
3h 50m1 stop
Porter Airlines Logo
9:35 am - 4:34 pmMDW-YOW
5h 59m1 stop
$288Porter Airlines
Find Deal
lun., sep. 1 - lun., sep. 8
WestJet Logo
3:35 pm - 12:39 pmYOW-ORD
22h 04m2 stops
WestJet Logo
5:30 pm - 4:19 pmORD-YOW
21h 49m2 stops
$289WestJet
Find Deal
vie., sep. 19 - lun., sep. 22
Air Canada Logo
11:05 am - 2:55 pmYOW-ORD
4h 50m1 stop
Air Canada Logo
8:40 am - 1:51 pmORD-YOW
4h 11m1 stop
$319Air Canada
Find Deal
mié., sep. 17 - mié., sep. 24
United Airlines Logo
5:25 pm - 6:54 pmYOW-ORD
2h 29mnonstop
United Airlines Logo
6:06 pm - 9:35 pmORD-YOW
2h 29mnonstop
$322United Airlines
Find Deal
mié., sep. 17 - mié., sep. 24
United Airlines Logo
5:25 pm - 6:54 pmYOW-ORD
2h 29mnonstop
United Airlines Logo
10:35 am - 4:43 pmORD-YOW
5h 08m1 stop
$331United Airlines
Find Deal
mié., sep. 17 - mié., sep. 24
Air Canada Logo
6:00 am - 9:51 amYOW-ORD
4h 51m1 stop
Air Canada Logo
8:40 am - 1:51 pmORD-YOW
4h 11m1 stop
$333Air Canada
Find Deal
mié., sep. 17 - mié., sep. 24
Logo
5:55 am - 8:39 amYOW-MDW
27h 44m1 stop
Logo
9:35 am - 12:22 amMDW-YOW
13h 47m1 stop
$348
Find Deal
sáb., oct. 4 - dom., oct. 12
Logo
5:55 am - 8:45 amYOW-MDW
27h 50m1 stop
Logo
9:40 am - 12:22 amMDW-YOW
13h 42m1 stop
$377
Find Deal
dom., ago. 24 - mar., ago. 26
Air Transat Logo
8:40 am - 3:20 pmYOW-MDW
7h 40m1 stop
Air Transat Logo
4:15 pm - 10:29 pmMDW-YOW
5h 14m1 stop
$532Air Transat
Find Deal
jue., ene. 22 - lun., ene. 26
Air Transat Logo
8:40 am - 3:20 pmYOW-MDW
7h 40m1 stop
Air Transat Logo
4:15 pm - 10:29 pmMDW-YOW
5h 14m1 stop
$573Air Transat
Find Deal
jue., dic. 18 - lun., dic. 22

United Airlines flights from Ottawa to Illinois

Our best United Airlines deals on Ottawa to Illinois flight tickets
United Airlines
Sep 17
YOW5:25 pmOttawa
2h 29m
ORD6:54 pmChicago O'Hare Intl
Sep 24
ORD6:06 pmChicago O'Hare Intl
2h 29m
YOW9:35 pmOttawa
$322
Find similar
United Airlines
Sep 17
YOW5:25 pmOttawa
2h 29m
ORD6:54 pmChicago O'Hare Intl
Sep 24
ORD10:35 amChicago O'Hare Intl
5h 08m
1 stop
YOW4:43 pmOttawa
$331
Find similar
United Airlines
Oct 5
YOW7:29 pmOttawa
4h 46m
1 stop
ORD11:15 pmChicago O'Hare Intl
Oct 9
ORD6:06 pmChicago O'Hare Intl
2h 29m
YOW9:35 pmOttawa
$337
Find similar

WestJet flights from Ottawa to Illinois

Our best WestJet deals on Ottawa to Illinois flight tickets
WestJet
Sep 19
YOW3:35 pmOttawa
22h 04m
2 stops
ORD12:39 pmChicago O'Hare Intl
Sep 22
ORD5:30 pmChicago O'Hare Intl
21h 49m
2 stops
YOW4:19 pmOttawa
$289
Find similar
WestJet
Sep 19
YOW5:15 pmOttawa
20h 24m
1 stop
ORD12:39 pmChicago O'Hare Intl
Sep 22
ORD5:30 pmChicago O'Hare Intl
21h 49m
2 stops
YOW4:19 pmOttawa
$292
Find similar
WestJet
Sep 19
YOW5:15 pmOttawa
20h 24m
1 stop
ORD12:39 pmChicago O'Hare Intl
Sep 22
ORD5:30 pmChicago O'Hare Intl
23h 50m
1 stop
YOW6:20 pmOttawa
$305
Find similar

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 agosto 5, 2025.
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 - MDW

YOWMDW

Ottawa

lun. 9/1

7:00 am-9:50 am

1 stop3h 50m

Chicago Midway

lun. 9/8

9:35 am-4:34 pm

1 stop5h 59m

$288

OttawaChicago

YOW - ORD

YOWORD

Ottawa

vie. 9/19

3:35 pm-12:39 pm

2 stops22h 04m

Chicago O'Hare Intl

lun. 9/22

5:30 pm-4:19 pm

2 stops21h 49m

$289

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mié. 9/17

11:05 am-2:55 pm

1 stop4h 50m

Chicago O'Hare Intl

mié. 9/24

8:40 am-1:51 pm

1 stop4h 11m

$319

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mié. 9/17

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

mié. 9/24

6:06 pm-9:35 pm

Nonstop2h 29m

$322

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mié. 9/17

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

mié. 9/24

10:35 am-4:43 pm

1 stop5h 08m

$331

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mié. 9/17

6:00 am-9:51 am

1 stop4h 51m

Chicago O'Hare Intl

mié. 9/24

8:40 am-1:51 pm

1 stop4h 11m

$333

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

sáb. 10/4

5:55 am-8:39 am

1 stop27h 44m

Chicago Midway

dom. 10/12

9:35 am-12:22 am

1 stop13h 47m

$348

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

dom. 8/24

5:55 am-8:45 am

1 stop27h 50m

Chicago Midway

mar. 8/26

9:40 am-12:22 am

1 stop13h 42m

$377

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

jue. 1/22

8:40 am-3:20 pm

1 stop7h 40m

Chicago Midway

lun. 1/26

4:15 pm-10:29 pm

1 stop5h 14m

$532

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

jue. 12/18

8:40 am-3:20 pm

1 stop7h 40m

Chicago Midway

lun. 12/22

4:15 pm-10:29 pm

1 stop5h 14m

$573

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 $339, 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 $358.

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 $464. Flights from Ottawa to Illinois on a Monday will generally be more expensive and average around $687. 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 evening. Flights from Ottawa to Illinois during this time can be as low as $353. Flights in the morning are often more expensive with an average ticket price of $650.

What is the cheapest Ottawa to Illinois flight route?

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

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $509 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Ottawa for as low as $232 on momondo.

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 20% 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

$171

Fastest flight time

2h 22m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in Illinois

2 airports
The best one-way flight to Illinois from Ottawa in the past 72 hours is $171. The best round-trip flight deal from Ottawa to Illinois found on momondo in the last 72 hours is $288.
The fastest flight from Ottawa to Illinois takes 2h 22m
Direct flights go from Ottawa to Illinois on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is United Airlines.
There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)
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  • 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
8,916 reviews
Search United Airlines flights
Air CanadaPriceFrom $326Free CancellationRating
7.1
9,890 reviews
Search Air Canada 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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