Cheap flights from Chicago to the United States from $85

In general, January is the cheapest month to fly from Chicago to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $264. If you aren’t able to travel during the month of January, then book flights to United States from Chicago during October instead. Flights to United States in October, while not as cheap as those in January, still average around $267.

According to our data, Friday is the cheapest day to fly to United States from Chicago. The lowest ticket price found for a Friday departure recently was $271. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $398. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

The cheapest time of day to fly to United States is in the evening when flights can be purchased for as low as $279. Try not to purchase tickets in the afternoon because they tend to be around $381. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You are more likely to see cheaper flights to United States from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $213 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Chicago for as low as $164 on momondo.

There are 4 cabin classes available to choose from on Chicago to United States 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 JetBlue are the most popular carriers operating from Chicago to United States

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to United States from Chicago according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 9 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

Historically, on average around 21% of flights between Chicago and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 140 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, Delta have had the least number of delays on this route over the last 12 months; with about 18% of their flights experiencing any sort of delay.

507 flights are operational daily from Chicago to United States as of August 2026. The most popular departure time for this route is 6:00PM, with 39% of flights per day taking off at noon.

3,553 flights are operational weekly from Chicago to United States as of August 2026. The most popular departure day for this route is Thu, with 19% of flights per week taking off on this day.