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Cheap flights from Ottawa to Chicago from $174

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 Chicago departing on 10/2. 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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Cheap round-trip flights

United Airlines Logo
6:33 am - 8:00 amYOW-ORD
2h 27mnonstop
United Airlines Logo
10:50 am - 2:04 pmORD-YOW
2h 14mnonstop
$341United Airlines
Find Deal
Fri, Oct 3 - Wed, Oct 15
Multiple Airlines Logo
3:50 pm - 4:50 pmYOW-ORD
26h 00m2 stops
Multiple Airlines Logo
5:05 am - 5:20 pmORD-YOW
11h 15m1 stop
$345Multiple Airlines
Find Deal
Fri, Oct 3 - Mon, Oct 6
Lufthansa Logo
5:25 pm - 6:54 pmYOW-ORD
2h 29mnonstop
Lufthansa Logo
6:06 pm - 9:35 pmORD-YOW
2h 29mnonstop
$346Lufthansa
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Thu, Oct 16 - Sun, Oct 19
United Airlines Logo
7:29 pm - 11:15 pmYOW-ORD
4h 46m1 stop
United Airlines Logo
8:50 am - 2:13 pmORD-YOW
4h 23m1 stop
$347United Airlines
Find Deal
Fri, Oct 3 - Wed, Oct 15
Multiple Airlines Logo
4:15 pm - 9:23 amYOW-ORD
18h 08m1 stop
Multiple Airlines Logo
6:10 pm - 12:42 amORD-YOW
29h 32m2 stops
$352Multiple Airlines
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Mon, Nov 10 - Sun, Nov 16
Air Canada Logo
5:25 pm - 6:54 pmYOW-ORD
2h 29mnonstop
Air Canada Logo
10:50 am - 2:04 pmORD-YOW
2h 14mnonstop
$403Air Canada
Find Deal
Fri, Oct 3 - Tue, Oct 7
Air Canada Logo
6:00 am - 1:08 pmYOW-ORD
8h 08m2 stops
Air Canada Logo
8:25 pm - 1:34 amORD-YOW
4h 09m1 stop
$414Air Canada
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Wed, Oct 1 - Sun, Oct 5
WestJet Logo
5:40 am - 8:23 pmYOW-ORD
15h 43m2 stops
WestJet Logo
11:14 am - 12:42 amORD-YOW
12h 28m2 stops
$426WestJet
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Thu, Nov 6 - Mon, Nov 10
WestJet Logo
5:55 am - 9:10 amYOW-ORD
28h 15m2 stops
WestJet Logo
1:26 pm - 12:22 amORD-YOW
9h 56m2 stops
$459WestJet
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Fri, Oct 3 - Tue, Oct 7
Lufthansa Logo
5:25 pm - 6:54 pmYOW-ORD
2h 29mnonstop
Lufthansa Logo
1:55 pm - 5:06 pmORD-YOW
2h 11mnonstop
$485Lufthansa
Find Deal
Wed, Oct 1 - Sun, Oct 5

Lufthansa flights from Ottawa to Chicago O'Hare Intl Airport

Our best Lufthansa deals on Ottawa to Chicago O'Hare Intl Airport flight tickets
Lufthansa
Oct 16
YOW5:25 pmOttawa
2h 29m
ORD6:54 pmChicago O'Hare Intl
Oct 19
ORD6:06 pmChicago O'Hare Intl
2h 29m
YOW9:35 pmOttawa
$346
Find similar
Lufthansa
Oct 1
YOW5:25 pmOttawa
2h 29m
ORD6:54 pmChicago O'Hare Intl
Oct 5
ORD1:55 pmChicago O'Hare Intl
2h 11m
YOW5:06 pmOttawa
$485
Find similar

Air Canada flights from Ottawa to Chicago O'Hare Intl Airport

Our best Air Canada deals on Ottawa to Chicago O'Hare Intl Airport flight tickets
Air Canada
Oct 3
YOW5:25 pmOttawa
2h 29m
ORD6:54 pmChicago O'Hare Intl
Oct 7
ORD10:50 amChicago O'Hare Intl
2h 14m
YOW2:04 pmOttawa
$403
Find similar
Air Canada
Oct 1
YOW6:00 amOttawa
8h 08m
2 stops
ORD1:08 pmChicago O'Hare Intl
Oct 5
ORD8:25 pmChicago O'Hare Intl
4h 09m
1 stop
YOW1:34 amOttawa
$414
Find similar
Air Canada
Mar 15
YOW5:45 amOttawa
6h 33m
1 stop
ORD11:18 amChicago O'Hare Intl
Mar 21
ORD7:15 amChicago O'Hare Intl
4h 07m
1 stop
YOW12:22 pmOttawa
$512
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momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to Chicago O'Hare Intl Airport 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 September 16, 2025.
Use the filters below to find and compare flights from Ottawa to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 10/3

6:33 am-8:00 am

Nonstop2h 27m

Chicago O'Hare Intl

Wed 10/15

10:50 am-2:04 pm

Nonstop2h 14m

$341

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 10/3

3:50 pm-4:50 pm

2 stops26h 00m

Chicago O'Hare Intl

Mon 10/6

5:05 am-5:20 pm

1 stop11h 15m

$345

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 10/16

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Sun 10/19

6:06 pm-9:35 pm

Nonstop2h 29m

$346

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 10/3

7:29 pm-11:15 pm

1 stop4h 46m

Chicago O'Hare Intl

Wed 10/15

8:50 am-2:13 pm

1 stop4h 23m

$347

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 11/10

4:15 pm-9:23 am

1 stop18h 08m

Chicago O'Hare Intl

Sun 11/16

6:10 pm-12:42 am

2 stops29h 32m

$352

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 10/3

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Tue 10/7

10:50 am-2:04 pm

Nonstop2h 14m

$403

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 10/1

6:00 am-1:08 pm

2 stops8h 08m

Chicago O'Hare Intl

Sun 10/5

8:25 pm-1:34 am

1 stop4h 09m

$414

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 11/6

5:40 am-8:23 pm

2 stops15h 43m

Chicago O'Hare Intl

Mon 11/10

11:14 am-12:42 am

2 stops12h 28m

$426

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 10/3

5:55 am-9:10 am

2 stops28h 15m

Chicago O'Hare Intl

Tue 10/7

1:26 pm-12:22 am

2 stops9h 56m

$459

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 10/1

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Sun 10/5

1:55 pm-5:06 pm

Nonstop2h 11m

$485

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 Chicago from

How to get the cheapest flight ticket from Ottawa to Chicago O'Hare Intl Airport

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 typical price of a round-trip flight between Ottawa and Chicago O'Hare Intl Airport?

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

The month of July is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Ottawa averaging around $443.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Saturday when prices can be found for as low as $523. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from Ottawa because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $683.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from Ottawa in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $571 when looking at flights departing in the afternoon. Try not to purchase tickets in the morning because they tend to be around $654. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ottawa to Chicago O'Hare Intl flight route?

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

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $516 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Ottawa for as low as $232 on momondo.

What cabin class options are available on Ottawa to Chicago O'Hare Intl flights?

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

When to book flights from Ottawa to Chicago O'Hare Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ottawa to Chicago O'Hare Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ottawa to Chicago O'Hare Intl Airport (YOW to ORD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to Chicago O'Hare Intl Airport

Best Price Found

$340

Fastest flight time

2h 08m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Ottawa in the past 72 hours is $340. The best round-trip flight deal from Ottawa to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $523.
The fastest flight from Ottawa to Chicago O'Hare Intl Airport takes 2h 08m
Direct flights go from Ottawa to Chicago O'Hare Intl Airport every day.
Search flight deals

  • How far is Ottawa to Chicago O'Hare Intl by plane?

    Ottawa and Chicago O'Hare Intl are 653.1 mi apart from one another. A reasonable flight in good conditions will take 2h 27m.

  • When did momondo last update prices for flights from Ottawa Airport to Chicago O'Hare Intl Airport?

    Prices for flights from Ottawa Airport to Chicago O'Hare Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ottawa Airport to Chicago O'Hare Intl Airport?

  • How old do you have to be to fly from Ottawa Airport to Chicago O'Hare Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ottawa Airport to Chicago O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The travel and health documents required for your trip to Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport. 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 Chicago O'Hare Intl Airport?

  • What is the most popular airline from Ottawa to Chicago O'Hare Intl Airport?

Best airlines flying from Ottawa to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Ottawa to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $324Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
Air CanadaPriceFrom $326Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights

  • United Airlines Flights From Ottawa to Chicago O'Hare Intl Airport

    United Airlines is one of the most popular airlines flying from Ottawa to Chicago O'Hare Intl Airport, operating 21 flights/week on average for this route. A good United Airlines flight deal for Ottawa to Chicago O'Hare Intl Airport starts from $324 round-trip, up to an average price of $519. Our users have rated United Airlines at 7.4/10.

  • Air Canada Flights From Ottawa to Chicago O'Hare Intl Airport

    Air Canada is also a popular choice for this route. Air Canada flight deals for Ottawa to Chicago O'Hare Intl Airport start from as low as $326 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around $550. Air Canada operates 21 flights to Chicago O'Hare Intl Airport from Ottawa in an average week. Users have rated it 7.1/10 across 10,000 reviews.

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lake Geneva
South Haven
Rockford
Schaumburg
Merrillville
Gurnee
Naperville
Rosemont
Kenosha
New Buffalo
Joliet
Oak Brook
Racine
Hammond
Orland Park
Tinley Park
Elgin
Aurora
Janesville
Benton Harbor

Why use momondo?

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

Finding the right flight to Chicago from Ottawa is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Chicago quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Chicago from Ottawa with this policy.

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

momondo provides multiple filters to help you find the best flight to Chicago 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 Chicago right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ottawa to Chicago flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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