Cheap flights from the United States to Chicago from $68

The month of February is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from United States averaging around $283.

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 $334. 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 United States because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $415.

Flying to Chicago O'Hare Intl Airport from United States in the evening is the least expensive time of day to depart. momondo users have found prices as low as $339 when looking at flights departing in the evening. Try not to purchase tickets at noon because they tend to be around $375. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Atlanta Hartsfield-Jackson to Chicago O'Hare Intl for the best United States - Chicago O'Hare Intl flight prices

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $246 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 United States for as low as $177 on momondo.

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

United Airlines, Delta, and Alaska Airlines are the most popular carriers operating from United States to Chicago O'Hare Intl

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from United States according to our data. United Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Chicago O'Hare Intl Airport. Keep in mind that there are 9 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 12% of flights between United States and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 159 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

The number of flights available between United States and Chicago O'Hare Intl Airport is 664 per day as of September 2026. The most frequent departure time is 10:00AM, with 39% of daily flights leaving in the afternoon.

4,652 flights are operational weekly from United States to Chicago O'Hare Intl Airport as of September 2026. The most popular departure day for this route is Sun, with 16% of flights per week taking off on this day.