$92 Find Cheap Flights from Illinois to the United States - Compare and Save

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to the United States.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to the United States is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Illinois to the United States with an airline and back with another airline.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Illinois to the United States up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Illinois and United States are connected by different airlines. The airlines that fly that route the most regularly are United Airlines (5,178 flights per week), American Airlines (3,690 flights per week), and Air New Zealand (3,352 flights per week).

There are 593 airports in the United States. The busiest airport is Hartsfield-Jackson Atlanta Airport (ATL), with 9% of all flights arriving there.

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in the United States is Fort Lauderdale Airport (FLL), with an average flight price of $168.

Based on KAYAK data, the cheapest day to fly to the United States is Friday where round-trip tickets can be as cheap as $271. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $396 on average.

The cheapest time of day to fly to the United States is generally at night, when round-trip flights cost $277 on average. Morning departures are around 24% cheaper than evening flights, on average. The most expensive time of day to fly to the United States is generally in the evening, which is peak travel time and where the average cost of a ticket is $374.

The cheapest ticket to the United States from Illinois found in the last 5 days was to Las Vegas, at $130 round-trip. The most popular route is Bloomington (BMI) to Atlanta (ATL) and the cheapest round-trip airline ticket found on this route in the last 5 days was $141.

The cheapest month for flights from Illinois to the United States is September, when tickets cost $166 (return) on average. On the other hand, the most expensive months are March and June, when the average cost of round-trip tickets is $224 and $218 respectively.

To get a below average price on the flight from Illinois to the United States, you should book around 2 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

From Illinois, there are direct flights to the United States from 10 cities. The city with the most direct flights is Chicago, with 32,840 direct flights each week.

There are around 4,853 direct flights from within Illinois to the United States every day. Most flights (34%) depart in the morning.

Each week there are around 33,971 direct flights from within Illinois to the United States. The most common day for departures is Sunday, with 16% of flights taking off on this day.

An average nonstop flight from Illinois to the United States takes 3h 02m, covering a distance of 1117 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Nashville (BNA) with an average flight time of 1h 24m.

Each week there are around 15 long-haul flights (6-12 hour flight duration), 3,702 medium-haul (3-6 hour flight duration) and 30,254 short-haul (up to 3 hour flight duration) flights to the United States. The most long-haul flights depart from Chicago.

Based on KAYAK flight searches, the most popular destination is New York (17% of total searches to the United States). The next most popular destinations are Seattle (7%) and Las Vegas (7%). Searches for flights to Dallas (5%), to Houston (5%) and to Denver (5%) are also popular.