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Cheap flights from Illinois to Ottawa from $110

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Ottawa departing on 4/14. 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

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Find the cheapest flights from Illinois to Ottawa

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
1:05 pm - 8:51 pm
STL
-
YOW
6h 46m
1 stop
Air Canada Logo
2:00 pm - 8:04 pm
YOW
-
STL
7h 04m
1 stop
$310Air Canada
Mon, May 4 - Mon, May 11
Air Canada Logo
1:05 pm - 8:46 pm
STL
-
YOW
6h 41m
1 stop
Air Canada Logo
7:00 am - 12:06 pm
YOW
-
STL
6h 06m
1 stop
$312Air Canada
Tue, May 5 - Tue, May 12
Air Canada Logo
7:05 am - 1:05 pm
STL
-
YOW
5h 00m
1 stop
Air Canada Logo
7:00 am - 12:06 pm
YOW
-
STL
6h 06m
1 stop
$346Air Canada
Sat, Jun 6 - Sat, Jun 13
Multiple Airlines Logo
7:30 am - 5:25 pm
MDW
-
YOW
8h 55m
1 stop
Multiple Airlines Logo
3:55 pm - 1:00 pm
YOW
-
MDW
22h 05m
1 stop
$353Multiple Airlines
Thu, Apr 23 - Sun, Apr 26
Air Canada Logo
1:05 pm - 8:46 pm
STL
-
YOW
6h 41m
1 stop
Air Canada Logo
2:35 pm - 8:25 pm
YOW
-
STL
6h 50m
1 stop
$358Air Canada
Wed, May 6 - Wed, May 13
Multiple Airlines Logo
7:30 am - 5:25 pm
MDW
-
YOW
8h 55m
1 stop
Multiple Airlines Logo
6:55 am - 3:20 pm
YOW
-
MDW
9h 25m
1 stop
$364Multiple Airlines
Thu, Apr 23 - Sun, Apr 26
United Airlines Logo
9:21 am - 9:35 pm
STL
-
YOW
11h 14m
1 stop
United Airlines Logo
5:25 pm - 9:13 pm
YOW
-
STL
4h 48m
1 stop
$366United Airlines
Tue, May 5 - Wed, May 6
United Airlines Logo
7:45 am - 5:07 pm
STL
-
YOW
8h 22m
1 stop
United Airlines Logo
2:40 pm - 9:13 pm
YOW
-
STL
7h 33m
2 stops
$375United Airlines
Fri, Apr 24 - Tue, Apr 28
American Airlines Logo
2:46 pm - 2:55 pm
BMI
-
YOW
23h 09m
3 stops
American Airlines Logo
7:00 am - 11:52 pm
YOW
-
BMI
17h 52m
2 stops
$882American Airlines
Wed, May 13 - Mon, May 18
American Airlines Logo
2:46 pm - 2:55 pm
BMI
-
YOW
23h 09m
3 stops
American Airlines Logo
8:40 am - 11:52 pm
YOW
-
BMI
16h 12m
3 stops
$913American Airlines
Wed, May 13 - Mon, May 18

United Airlines flights from Illinois to Ottawa

Our best United Airlines deals on Illinois to Ottawa flight tickets
United Airlines
May 5
STL9:21 amLambert-St Louis
11h 14m
1 stop
YOW9:35 pmOttawa
May 6
YOW5:25 pmOttawa
4h 48m
1 stop
STL9:13 pmLambert-St Louis
$366
United Airlines
Apr 24
STL7:45 amLambert-St Louis
8h 22m
1 stop
YOW5:07 pmOttawa
Apr 28
YOW2:40 pmOttawa
7h 33m
2 stops
STL9:13 pmLambert-St Louis
$375
United Airlines
Apr 15
STL9:10 amLambert-St Louis
8h 45m
2 stops
YOW6:55 pmOttawa
Apr 19
YOW6:10 amOttawa
5h 46m
1 stop
STL10:56 amLambert-St Louis
$376

WestJet flights from Illinois to Ottawa

Our best WestJet deals on Illinois to Ottawa flight tickets
WestJet
May 5
STL6:05 amLambert-St Louis
10h 30m
2 stops
YOW5:35 pmOttawa
May 6
YOW6:55 amOttawa
9h 37m
2 stops
STL3:32 pmLambert-St Louis
$1,264
WestJet
Mar 30
MDW9:35 amChicago Midway
14h 04m
2 stops
YOW12:39 amOttawa
Mar 31
YOW5:40 amOttawa
13h 14m
2 stops
MDW5:54 pmChicago Midway
$1,359
WestJet
Apr 3
MDW9:35 amChicago Midway
14h 04m
2 stops
YOW12:39 amOttawa
Apr 6
YOW5:45 pmOttawa
25h 55m
2 stops
MDW6:40 pmChicago Midway
$1,382

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Ottawa 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 March 24, 2026.
Use the filters below to find and compare flights from Illinois to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Mon 5/4

1:05 pm-8:51 pm

1 stop6h 46m

Ottawa

Mon 5/11

2:00 pm-8:04 pm

1 stop7h 04m

$310

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Tue 5/5

1:05 pm-8:46 pm

1 stop6h 41m

Ottawa

Tue 5/12

7:00 am-12:06 pm

1 stop6h 06m

$312
Quickest round-trip

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sat 6/6

7:05 am-1:05 pm

1 stop5h 00m

Ottawa

Sat 6/13

7:00 am-12:06 pm

1 stop6h 06m

$346

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Thu 4/23

7:30 am-5:25 pm

1 stop8h 55m

Ottawa

Sun 4/26

3:55 pm-1:00 pm

1 stop22h 05m

$353

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 5/6

1:05 pm-8:46 pm

1 stop6h 41m

Ottawa

Wed 5/13

2:35 pm-8:25 pm

1 stop6h 50m

$358

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Thu 4/23

7:30 am-5:25 pm

1 stop8h 55m

Ottawa

Sun 4/26

6:55 am-3:20 pm

1 stop9h 25m

$364

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Tue 5/5

9:21 am-9:35 pm

1 stop11h 14m

Ottawa

Wed 5/6

5:25 pm-9:13 pm

1 stop4h 48m

$366

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Fri 4/24

7:45 am-5:07 pm

1 stop8h 22m

Ottawa

Tue 4/28

2:40 pm-9:13 pm

2 stops7h 33m

$375

BloomingtonOttawa

BMI - YOW

BMIYOW

Bloomington-Normal

Wed 5/13

2:46 pm-2:55 pm

3 stops23h 09m

Ottawa

Mon 5/18

7:00 am-11:52 pm

2 stops17h 52m

$882

BloomingtonOttawa

BMI - YOW

BMIYOW

Bloomington-Normal

Wed 5/13

2:46 pm-2:55 pm

3 stops23h 09m

Ottawa

Mon 5/18

8:40 am-11:52 pm

3 stops16h 12m

$913

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 Ottawa from

How to get the cheapest flight ticket from Illinois to Ottawa

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 Ottawa?

In general, May is the cheapest month to fly from Illinois to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $338. The month of September is another great option to travel to Ottawa, with average flight prices from Illinois averaging around $400.

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

The cheapest day to depart from Illinois to Ottawa is on a Saturday. Travelers who choose to depart for Ottawa on a Saturday will often find tickets for as low as $499. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Ottawa on Monday is $708.

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

In the morning is the cheapest time of day to fly from Illinois to Ottawa when you can find flight prices for as low as $551. Flying to Ottawa in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $616 on average. Flights to Ottawa from Illinois at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Illinois to Ottawa flight route?

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

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

There are 4 cabin classes available to choose from on Illinois to Ottawa 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 Illinois to Ottawa flights?

You could potentially save up to 23% on your flight if you consider stops on a Illinois to Ottawa flight.

Cheap Illinois to Ottawa flight deals and tips

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

Best Price Found

$370

Fastest flight time

2h 12m

Direct flights

Every day

Airports in Ottawa

1 airport
The best one-way flight to Ottawa from Illinois in the past 72 hours is $370. The best round-trip flight deal from Illinois to Ottawa found on momondo in the last 72 hours is $500.
The fastest flight from Illinois to Ottawa takes 2h 12m
Direct flights go from Illinois to Ottawa every day.
There is 1 airport in Ottawa. From Illinois there are direct flights to Ottawa (YOW).
Search flight deals

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

    Prices for flights from Illinois to Ottawa Airport are refreshed on a daily basis.

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

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

  • What documentation or ID do you need to fly to Ottawa Airport?

    The necessary travel and health documents for your Ottawa Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Illinois to Ottawa

Compare and see reviews for airlines that fly from Illinois to Ottawa with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $181Free CancellationRating
7.1
10,836 reviews
Search Air Canada flights
United AirlinesPriceFrom $257Free CancellationRating
7.4
9,469 reviews
Search United Airlines flights

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Pembroke
Calabogie
Petawawa
Smiths Falls
Brockville
Perth
Prescott
Winchester
Wakefield

Why use momondo?

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

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 Illinois to Ottawa for you.

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

Yes. All flights to Ottawa from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Illinois to Ottawa flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Illinois to Ottawa now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ottawa and let you know when they change.

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