$359 Find Cheap Flights from London to Illinois - Compare and Save

The cheapest ticket to Illinois from London found in the last 5 days was to Chicago, at $625 round-trip. The most popular route is from London Heathrow Airport (LHR) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $625.

The cheapest time of day to fly to Illinois is generally in the afternoon, when round-trip flights cost $906 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $946.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $1,006 on average.

The cheapest month for flights from London to Illinois is February, when tickets cost $615 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $1,020 and $932 respectively.

When flying from London to Illinois, you should consider leaving on a Thursday and avoid Saturdays if you are looking for the best rates. For your return to London, you’ll find the best rates on Tuesdays and the most expensive ones on Saturdays.

To get a below average price on the flight from London to Illinois, you should book around 4 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

There are 5 airlines that fly nonstop from London to Illinois. They are: American Airlines, Austrian Airlines, United Airlines, Lufthansa and British Airways. The cheapest price of all airlines flying this route was found with Austrian Airlines at $530 for a round-trip flight to Chicago O'Hare Intl Airport (ORD). On average, British Airways offers the best prices for nonstop flights between London and Illinois.

American Airlines connects London to Illinois with 52 flights per week. Alaska Airlines also offers 52 flights per week, while British Airways follows with 52 flights per week.

The duration of a flight to Illinois depends on your arrival airport. The shortest routes to Illinois from London are to Moline, which takes 12h 47m, Chicago, which takes 13h 55m, and Peoria, which takes 23h 38m.

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

The earliest flight from London to Illinois departs at 8:00 am, landing in Chicago at 11:05 am.

If you prefer to fly at night, the latest flight from London to Illinois jets off at 3:15 pm and lands in Chicago at 6:15 pm.