Cheap flights from Chicago to Ontario from $67

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Cheap Chicago - Ontario flight offers

Find cheap flight tickets and last-minute flight deals from Chicago to Ontario

Frontier Airlines
Thu, 06/11 (CHI) Chicago -> (ONT) Ontario
Direct
Frontier Airlines
Mon, 06/15 (ONT) Ontario -> (CHI) Chicago
Direct

Price found 10 days ago
from $123
American Airlines
Sat, 06/13 (CHI) Chicago -> (ONT) Ontario
Direct
American Airlines
Sun, 06/21 (ONT) Ontario -> (CHI) Chicago
Direct

Price found 8 days ago
from $151
American Airlines
Fri, 06/12 (CHI) Chicago -> (ONT) Ontario
Direct
American Airlines
Sun, 06/21 (ONT) Ontario -> (CHI) Chicago
Direct

Price found 8 days ago
from $191
Frontier Airlines
Sat, 08/01 (CHI) Chicago -> (ONT) Ontario
Direct
Frontier Airlines
Sun, 08/09 (ONT) Ontario -> (CHI) Chicago
Direct

Price found 9 days ago
from $231
Southwest Airlines
Sun, 06/21 (CHI) Chicago -> (ONT) Ontario
Direct

Price found 9 days ago
from $67
Frontier Airlines
Thu, 06/11 (CHI) Chicago -> (ONT) Ontario
Direct
Frontier Airlines
Mon, 06/15 (ONT) Ontario -> (CHI) Chicago
Direct

Price found 10 days ago
from $123
American Airlines
Sat, 06/13 (CHI) Chicago -> (ONT) Ontario
Direct
American Airlines
Sun, 06/21 (ONT) Ontario -> (CHI) Chicago
Direct

Price found 8 days ago
from $151
American Airlines
Fri, 06/12 (CHI) Chicago -> (ONT) Ontario
Direct
American Airlines
Sun, 06/21 (ONT) Ontario -> (CHI) Chicago
Direct

Price found 8 days ago
from $191
Frontier Airlines
Sat, 08/01 (CHI) Chicago -> (ONT) Ontario
Direct
Frontier Airlines
Sun, 08/09 (ONT) Ontario -> (CHI) Chicago
Direct

Price found 9 days ago
from $231

Info about flights from Chicago to Ontario

Some useful info about flights from Chicago to Ontario to help you plan your next trip

Best price last 15 days $67
Average flight duration 4h 18m
Cheapest month February
Average number of flights per week 3
First flight time 05:00
Last flight time 22:15
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Top airlines on the route Chicago - Ontario

Airlines providing flights to Ontario from Chicago

How much is a flight from Chicago to Ontario?

There’s no fixed price — fares between Chicago and Ontario can vary a lot by day or time.

$67 is the lowest fare found in the past 15 days.

Flying during the week can be more affordable, as weekend flights tend to be pricier. Also consider demand and availability: the last remaining seats often come at higher fares!

Flying from or to Chicago and Ontario? Here are your airport options

Knowing your full list of nearby airports can make flight planning easier, especially when routes vary.

  • Airports in Chicago: You have 3 departure options - Midway, O'Hare, Rockford.
  • Airports in Ontario: Ontario is the only arrival option right now.

For families or those traveling with assistance, smaller airports can be easier to navigate. Cities served by multiple airports often allow for more flexible travel planning.

Flight filters for the route Chicago – Ontario

Customize your search on Jetcost to focus only on flights that suit your needs. Whether you want a direct connection, specific airline, or shorter layover, filters help you find it faster.

Other popular destinations

Flights to United States are often searched alongside: Las Vegas, Los Angeles, Miami, New York City, Orlando.

The cheapest flights might leave at odd hours or arrive at less central airports — keep that in mind. If you travel often, you can always select your trusted airlines from the available options.

Frequently Asked Questions

Frequently asked questions about flights from Chicago to Ontario.

How much does an airline ticket from Chicago to Ontario cost?

The lowest price recorded in the last 15 days for a flight from Chicago to Ontario is $67.

How far is Chicago from Ontario?

Chicago is about 1707 mi from Ontario.

What are the airports in Ontario?

Ontario has one airport: Ontario.

What are the airports in Chicago?

Chicago has 3 airports: Midway, O'Hare, Rockford.

What are the most popular cities in United States?

The most popular cities in United States according to our users' searches are: Las Vegas, Los Angeles, Miami, New York City, Orlando.

When should I book a flight from Chicago to Ontario?

The best time to book a flight from Chicago to Ontario is 1 month in advance, while the worst time is 12 weeks in advance.

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

The cheapest month to fly from Chicago to Ontario is February.

What is the most expensive month to fly from Chicago to Ontario?

The most expensive month to fly from Chicago to Ontario is August.

What is the best day of the week to fly from Chicago to Ontario?

For flights from Chicago to Ontario Thursday is on average the cheapest day to fly, while Saturday is the most expensive day to fly.