What are the cheapest airlines to fly from Chicago to Region of Ontario one-way?

To fly one-way, consider booking your trip with Porter Airlines, which is currently one of the cheapest options available, starting at $116. Air Canada flights start at $127 while deals on United Airlines start at $132 one-way.

Weekly flight availability from Chicago to Region of Ontario

The most flights from CHI to CAON are scheduled on a Monday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (29 on average).

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

What are the most popular routes from Chicago to Region of Ontario?

Most travelers choose Chicago O'Hare Intl - Toronto Pearson Intl, Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl or Chicago Midway - Toronto Pearson Intl when deciding on the best route from Chicago to Region of Ontario.

What are the cheapest flights from Chicago to Region of Ontario?

Looking at all options, your cheapest flight can be booked for $137. While the most popular route (Chicago O'Hare Intl - Toronto Pearson Intl) can be booked for $260 on average our data indicates $971 when flying from Chicago to Region of Ontario.

What are the most reliable airlines from Chicago to Region of Ontario?

Consider Royal Jordanian (94%), Egyptair (91%) or Qatar Airways (90%) when booking your flight. These represent the most reliable airlines when flying from Chicago to Region of Ontario.

What are the most popular airlines that fly from Chicago to Region of Ontario?

American Airlines, Air Canada and Porter Airlines are the most popular airlines when flying from Chicago to Region of Ontario.

How far in advance should I book a flight from Chicago to Region of Ontario?

To save on the cost of your flight from Chicago to Region of Ontario, book at least 35 days before your planned departure. Booking around this time can save you about 69% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $344 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $567.

What is the cheapest month to fly from Chicago to Region of Ontario?

Due to multiple factors, expect to potentially pay more when booking in November. For low rates, April can be a great choice for travel to Region of Ontario. Flights to Region of Ontario from Chicago in April are about $298 on average during April, but can be found for as low as $211.

What is the cheapest time of day to fly from CHI to ON?

When flying from Chicago to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Chicago to Ontario that include hotel bookings?

Yes. In addition to deals on Chicago to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Chicago to Ontario?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Ontario.

Can I find deals for business class flights from Chicago to Ontario?

Yes. Cheapflights offers flight deals from Chicago to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$99+ Flights from Chicago to Ontario

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Cheap flight deals from Chicago to Ontario

Round-trip from	$222 (Trip.com)
One-way from	$99 (Kiwi.com)

From Chicago (CHI) to Ontario

Search Deals

One-way flight from Chicago (CHI) to Ontario

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Find flight deals from Chicago to Ontario

Cheapest flights from Chicago to Ontario
Explore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 16, 2025.

mar. 2/181:05 pmMDW - YTZ

Nonstop1h 42mPorter Airlines

dom. 2/2311:20 amYTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 1/15

$222

jue. 2/201:05 pmMDW - YTZ

Nonstop1h 42mAir Transat

dom. 2/2311:20 amYTZ - MDW

Nonstop1h 50mAir Transat

Deal found 1/15

$243

mar. 2/45:11 amORD - YYZ

1 stop17h 44mMultiple Airlines

mar. 2/117:55 pmYYZ - ORD

1 stop23h 23mMultiple Airlines

Deal found 1/15

$247

jue. 2/65:11 amORD - YUL

1 stop8h 44mMultiple Airlines

mar. 2/113:55 pmYUL - ORD

1 stop8h 37mMultiple Airlines

Deal found 1/15

$255

vie. 2/75:30 amMDW - YTZ

2 stops10h 18mMultiple Airlines

sáb. 2/811:20 amYTZ - MDW

Nonstop1h 50mMultiple Airlines

Deal found 1/15

$263

dom. 3/22:05 pmORD - YUL

1 stop5h 48mAir Canada

dom. 3/99:15 amYUL - ORD

Nonstop2h 39mAir Canada

Deal found 1/16

$265

dom. 3/25:35 pmMDW - YUL

1 stop3h 55mPorter Airlines

mar. 3/116:50 amYUL - MDW

1 stop4h 30mPorter Airlines

Deal found 1/15

$286

mié. 2/57:20 amORD - YTZ

1 stop6h 30mAir Canada

jue. 2/610:25 amYTZ - ORD

1 stop5h 20mAir Canada

Deal found 1/15

$286

mié. 2/59:13 pmORD - YYZ

Nonstop1h 46mLufthansa

jue. 2/63:30 pmYYZ - ORD

Nonstop2h 11mLufthansa

Deal found 1/15

$290

mié. 2/56:35 pmORD - YYZ

Nonstop1h 45mAmerican Airlines

jue. 2/61:14 pmYYZ - ORD

Nonstop2h 00mAmerican Airlines

Deal found 1/15

$292

mar. 2/47:20 amORD - YYZ

1 stop5h 21mAir Canada

mar. 2/119:00 pmYYZ - ORD

Nonstop2h 13mAir Canada

Deal found 1/15

$293

lun. 3/35:10 amORD - YOW

1 stop11h 10mMultiple Airlines

jue. 3/136:15 amYOW - ORD

1 stop10h 41mMultiple Airlines

Deal found 1/16

$294

Best flights from Chicago to Ontario
Discover carefully curated flight deals from Chicago to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated enero 16, 2025.

mar. 2/181:05 pmMDW - YTZ

Nonstop1h 42mPorter Airlines

dom. 2/2311:20 amYTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 1/15

$222

jue. 2/201:05 pmMDW - YTZ

Nonstop1h 42mAir Transat

dom. 2/2311:20 amYTZ - MDW

Nonstop1h 50mAir Transat

Deal found 1/15

$243

mar. 2/45:11 amORD - YYZ

1 stop17h 44mMultiple Airlines

mar. 2/117:55 pmYYZ - ORD

1 stop23h 23mMultiple Airlines

Deal found 1/15

$247

dom. 3/22:05 pmORD - YUL

1 stop5h 48mAir Canada

dom. 3/99:15 amYUL - ORD

Nonstop2h 39mAir Canada

Deal found 1/16

$265

mié. 2/59:13 pmORD - YYZ

Nonstop1h 46mLufthansa

jue. 2/63:30 pmYYZ - ORD

Nonstop2h 11mLufthansa

Deal found 1/15

$290

mié. 2/56:35 pmORD - YYZ

Nonstop1h 45mAmerican Airlines

jue. 2/61:14 pmYYZ - ORD

Nonstop2h 00mAmerican Airlines

Deal found 1/15

$292

vie. 2/74:00 pmORD - YYZ

Nonstop1h 41mUnited Airlines

lun. 2/1012:20 pmYYZ - ORD

Nonstop1h 51mUnited Airlines

Deal found 1/15

$301

vie. 2/146:45 amORD - YYZ

1 stop8h 24mDelta

lun. 2/171:20 pmYYZ - ORD

1 stop8h 33mDelta

Deal found 1/14

$326

jue. 2/201:26 pmMDW - YYZ

1 stop8h 41mWestJet

dom. 2/236:30 amYYZ - MDW

1 stop7h 12mWestJet

Deal found 1/16

$336

jue. 2/61:05 pmMDW - YTZ

Nonstop1h 42mAPG Airlines

dom. 2/911:20 amYTZ - MDW

Nonstop1h 50mAPG Airlines

Deal found 1/15

$367

jue. 2/65:11 amORD - YUL

1 stop8h 44mMultiple Airlines

mar. 2/113:55 pmYUL - ORD

1 stop8h 37mMultiple Airlines

Deal found 1/15

$255

dom. 3/25:35 pmMDW - YUL

1 stop3h 55mPorter Airlines

mar. 3/116:50 amYUL - MDW

1 stop4h 30mPorter Airlines

Deal found 1/15

$286

Last-minute flights from Chicago to Ontario
Discover last-minute flight deals from Chicago to Ontario. Data last updated enero 16, 2025 and is based on user searches.

mar. 1/215:35 amORD - YTZ

2 stops12h 18mMultiple Airlines

jue. 1/232:00 pmYTZ - ORD

2 stops21h 17mMultiple Airlines

Deal found 1/14

$337

mié. 1/221:05 pmMDW - YTZ

Nonstop1h 42mMultiple Airlines

mié. 1/2911:20 amYTZ - MDW

Nonstop1h 50mMultiple Airlines

Deal found 1/14

$376

mié. 1/2210:00 amORD - YYZ

1 stop5h 11mWestJet

mié. 1/2910:05 amYYZ - ORD

1 stop7h 08mWestJet

Deal found 1/14

$453

mié. 1/226:28 pmMDW - YYZ

1 stop3h 24mDelta

sáb. 2/16:00 amYYZ - MDW

1 stop3h 54mDelta

Deal found 1/15

$455

jue. 1/231:05 pmMDW - YTZ

Nonstop1h 42mPorter Airlines

jue. 2/1311:20 amYTZ - MDW

Nonstop1h 50mPorter Airlines

Deal found 1/15

$340

jue. 1/2310:30 amORD - YYZ

1 stop4h 42mDelta

jue. 2/131:20 pmYYZ - ORD

1 stop6h 05mDelta

Deal found 1/15

$434

vie. 1/241:44 pmORD - YUL

2 stops24h 11mMultiple Airlines

mar. 1/283:55 pmYUL - ORD

1 stop8h 37mMultiple Airlines

Deal found 1/15

$316

vie. 1/243:37 pmMDW - YYZ

1 stop17h 17mMultiple Airlines

dom. 1/267:55 pmYYZ - MDW

1 stop20h 07mMultiple Airlines

Deal found 1/15

$371

sáb. 1/257:26 amORD - YYZ

1 stop15h 27mMultiple Airlines

dom. 1/268:15 pmYYZ - ORD

1 stop16h 05mMultiple Airlines

Deal found 1/15

$279

sáb. 1/258:40 pmORD - YYZ

1 stop12h 29mAmerican Airlines

dom. 1/261:14 pmYYZ - ORD

Nonstop2h 00mAmerican Airlines

Deal found 1/15

$425

dom. 1/262:05 pmORD - YYZ

Nonstop1h 41mAir Canada

vie. 1/3112:20 pmYYZ - ORD

Nonstop1h 51mAir Canada

Deal found 1/14

$396

dom. 1/2610:53 amORD - YYZ

Nonstop1h 49mUnited Airlines

sáb. 2/112:20 pmYYZ - ORD

Nonstop1h 51mUnited Airlines

Deal found 1/14

$401

One-way flights from Chicago to Ontario
Search for one-way flight options from Chicago to Ontario. Find affordable one-way fares based on user searches. Data last updated enero 16, 2025.

jue. 2/63:56 pmORD - YUL

1 stop21h 59mMultiple Airlines

Deal found 1/14

$99

jue. 2/271:05 pmMDW - YTZ

Nonstop1h 42mPorter Airlines

Deal found 1/15

$116

lun. 2/105:35 amORD - YTZ

2 stops13h 30mMultiple Airlines

Deal found 1/15

$117

mié. 2/1912:02 pmORD - YYZ

1 stop10h 51mMultiple Airlines

Deal found 1/15

$117

mié. 2/122:05 pmORD - YYZ

Nonstop1h 41mAir Canada

Deal found 1/14

$127

dom. 2/910:53 amORD - YYZ

Nonstop1h 49mUnited Airlines

Deal found 1/16

$132

mié. 2/124:20 pmMDW - YYZ

1 stop18h 25mMultiple Airlines

Deal found 1/15

$133

sáb. 2/154:15 pmORD - YYZ

1 stop5h 52mDelta

Deal found 1/14

$136

lun. 2/103:35 pmORD - YTZ

1 stop5h 15mAir Canada

Deal found 1/15

$137

jue. 2/131:05 pmMDW - YUL

1 stop5h 20mPorter Airlines

Deal found 1/15

$139

jue. 2/272:08 pmMDW - YYZ

1 stop7h 41mDelta

Deal found 1/16

$142

lun. 4/144:45 pmORD - YUL

1 stop21h 51mWestJet

Deal found 1/14

$143

Find flights from Chicago to Ontario within your budget

Fly from

Fly to

Route

Depart

Return

Price

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

mar. 2/18

1:05 pm-3:47 pm

Nonstop1h 42m

Toronto Island

dom. 2/23

11:20 am-12:10 pm

Nonstop1h 50m

$222

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

jue. 1/30

7:26 am-11:53 pm

1 stop15h 27m

Toronto Pearson Intl

lun. 2/3

7:00 am-2:23 pm

1 stop8h 23m

$252

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

jue. 2/6

5:11 am-2:55 pm

1 stop8h 44m

Montreal Pierre Elliott Trudeau Intl

mar. 2/11

3:55 pm-11:32 pm

1 stop8h 37m

$255

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

jue. 2/20

1:05 pm-3:47 pm

Nonstop1h 42m

Toronto Island

dom. 2/23

11:20 am-12:10 pm

Nonstop1h 50m

$257

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

dom. 3/2

2:05 pm-8:53 pm

1 stop5h 48m

Montreal Pierre Elliott Trudeau Intl

dom. 3/9

9:15 am-10:54 am

Nonstop2h 39m

$265

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

vie. 2/7

5:30 am-4:48 pm

2 stops10h 18m

Toronto Island

dom. 2/9

11:20 am-12:10 pm

Nonstop1h 50m

$271

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

dom. 3/2

5:35 pm-10:30 pm

1 stop3h 55m

Montreal Pierre Elliott Trudeau Intl

mar. 3/11

6:50 am-10:20 am

1 stop4h 30m

$286

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

lun. 3/3

5:10 am-5:20 pm

1 stop11h 10m

Ottawa

jue. 3/13

6:15 am-3:56 pm

1 stop10h 41m

$294

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

jue. 2/6

9:49 am-12:30 pm

Nonstop1h 41m

Toronto Pearson Intl

lun. 2/10

1:14 pm-2:14 pm

Nonstop2h 00m

$297

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

dom. 2/2

5:35 am-8:05 pm

2 stops13h 30m

Toronto Island

mié. 2/5

2:00 pm-10:17 am

2 stops21h 17m

$298

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 60 results

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Best time to book a flight from Chicago to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Chicago with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Chicago to Ontario

Get recent, data-driven insights about flights from Chicago to Ontario including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Chicago to Region of Ontario?

Currently, January is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of $243). Flying from Chicago to Region of Ontario in July is currently the most expensive (average of $359). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

$99+ Cheap flights from Chicago (CHI) to Ontario

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/6. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Chicago to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Chicago to Ontario

Round-trip from

One-way from

Find flight deals from Chicago to Ontario

Cheapest flights from Chicago to OntarioExplore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 16, 2025.

Explore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 16, 2025.

Find flights from Chicago to Ontario within your budget

Best time to book a flight from Chicago to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Chicago with our price prediction graph.

Travel insights for flights from Chicago to Ontario

Get recent, data-driven insights about flights from Chicago to Ontario including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Chicago to Region of Ontario?

Cheapest flights from Chicago to Ontario
Explore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 16, 2025.