Cheap flights to Illinois, United States

One search, all the flights

We find you the best flight deals and travel hacks so that you can choose how to book.

Rise above all travel anxieties

With the Kiwi.com Guarantee we have your back with whatever happens.

Trusted by millions

Join over 10 million yearly travellers booking with ease.

Cheapest month to fly to Illinois

Explore price trends for trips to Illinois

Annual Avg. Price305 GBP
July 2025323 GBP
August 2025307 GBP
September 2025263 GBP
October 2025268 GBP
November 2025260 GBP
December 2025248 GBP
January 2026273 GBP
February 2026326 GBP
March 2026306 GBP
April 2026328 GBP
May 2026319 GBP
June 2026442 GBP

Illinois - popular routes

Flights to Illinois

Flights from Illinois

Flights to places near Illinois

Frequently asked questions

What are the main airports in Illinois, United States?
When is the best time of the year to fly to Illinois, United States?
What to do in Illinois, United States?
When to book your flight to Illinois, United States?
What part of Illinois, United States is visited the most?
What are top tourist attractions in Illinois, United States?

Download our app

Start your next adventure now. Download our app and explore cheap flights effortlessly!


We hack the system,
you fly for less