Cheap flights from Illinois to England from £168

The cheapest month to fly to England from Illinois is in January. Flight prices, which tend to average around £493, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to England from Illinois during February instead. Flights to England in February, while not as cheap as those in January, still average around £511.

The cheapest day to depart from Illinois to England is on a Monday when prices can be found for as low as £550. The most expensive day to fly to England is Saturday, with ticket prices averaging around £979.

Flying to England from Illinois in the evening is the least expensive time of day to depart. momondo users have found prices as low as £772 when looking at flights departing in the evening. Flights to England are more costly in the afternoon, with an average ticket price of £839. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Chicago O'Hare Intl to London Heathrow for the best Illinois - England flight prices

You are more likely to see cheaper flights to England from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to England for around £658 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to England from Illinois for as low as £607 on momondo.

There are 3 cabin classes available to choose from on Illinois to England flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

British Airways, United Airlines, and KLM are the most popular carriers operating from Illinois to England

British Airways, Aer Lingus and Icelandair are the top three most popular airlines that fly to England from Illinois according to our data. British Airways is the first choice among our users, with 34% of people opting to fly with this airline when travelling to England. Keep in mind that there are 7 different airlines that fly to England on a routine basis, so you have a few additional options to choose from.

As of September 2026, 51 flights take off from Illinois and land in England each day. The most common flight departure time for this route is 18:00, with 79% of daily flights taking off in the evening.

As of September 2026, there are 359 flights per week flying from Illinois to England. The most common day of the week flights depart is Wed, with 17% of flights taking off on this day.