Cheap flights from Illinois to England from £236

The cheapest month to fly to England from Illinois is in February. Flight prices, which tend to average around £475, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to England from Illinois during September instead. Flights to England in September, while not as cheap as those in February, still average around £487.

The cheapest day to depart from Illinois to England is on a Sunday when prices can be found for as low as £510. The most expensive day to fly to England is Thursday, with ticket prices averaging around £710.

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 £565 when looking at flights departing in the evening. Flights to England are more costly in the afternoon, with an average ticket price of £653. 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 £587 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 £517 on momondo.

There are 4 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.

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

British Airways, Aer Lingus and United Airlines 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 53% of people opting to fly with this airline when travelling to England. Keep in mind that there are 8 different airlines that fly to England on a routine basis, so you have a few additional options to choose from.

As of April 2026, 55 flights take off from Illinois and land in England each day. The most common flight departure time for this route is 22:00, with 69% of daily flights taking off in the evening.

As of April 2026, there are 390 flights per week flying from Illinois to England. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.