Cheap flights from the United Kingdom to Illinois from $282
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Illinois departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from United Kingdom to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from United Kingdom is in February. Flight prices, which tend to average around $580, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $611.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from United Kingdom to Illinois is on a Friday when prices can be found for as low as $805. Flights from United Kingdom to Illinois on a Sunday will generally be more expensive and average around $940. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from United Kingdom to Illinois during this time can be as low as $620. Flights in the afternoon are often more expensive with an average ticket price of $953.
What is the cheapest United Kingdom to Illinois flight route?
Fly from London Heathrow to Chicago O'Hare Intl for the best United Kingdom - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from United Kingdom when booking 13 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $742 when searching 13 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from United Kingdom for as low as $710 on momondo.
What cabin class options are available on United Kingdom to Illinois flights?
There are 4 cabin classes available to choose from on United Kingdom to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from United Kingdom to Illinois?
TAP AIR PORTUGAL is the most popular carrier operating from United Kingdom to Illinois
What airlines fly to Illinois?
British Airways, Aer Lingus and American Airlines are the top three most popular airlines that fly to Illinois from United Kingdom according to our data. British Airways is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 11 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from United Kingdom to Illinois on average per day?
The number of flights available between United Kingdom and Illinois is 55 per day as of June 2025. The most frequent departure time is 11:00AM, with 50% of daily flights leaving in the afternoon.
How many flights depart from United Kingdom to Illinois on average per week?
As of June 2025, 386 flights take off from United Kingdom and land in Illinois each week. The most common flight departure day for this route is Sat, with 15% of weekly flights taking off on this day.
Cheap United Kingdom to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from United Kingdom to Illinois
When did momondo last update prices for flights from United Kingdom to Illinois?
Prices for flights from United Kingdom to Illinois are updated daily.
How many operators does momondo search for flights from United Kingdom to Illinois?
There are 12 operators available for flights from United Kingdom to Illinois as of June 2025.
How old do you have to be to fly from United Kingdom to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United Kingdom to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from United Kingdom to Illinois?
Based on momondo bookings for flights between United Kingdom and Illinois, the leading plane model is Boeing 767-300, making up 40.87% of the total bookings. Other popular models include Boeing 787-10 Dreamliner with 19.17%, Boeing 777 with 15.12%, and Boeing 777-300ER with 7.32%.
Best airlines flying from United Kingdom to Illinois
Compare and see reviews for airlines that fly from United Kingdom to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $390 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom $462 | Free Cancellation | Rating 7.3 1,388 reviews | |||
| PriceFrom $483 | Free Cancellation | Rating 7.1 1,890 reviews | |||
| PriceFrom $538 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $551 | Free Cancellation | Rating 6.6 7,019 reviews | |||
| PriceFrom $568 | Free Cancellation | Rating 7.1 1,118 reviews | |||
| PriceFrom $582 | Free Cancellation | Rating 7.0 2,778 reviews | |||
| PriceFrom $582 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $586 | Free Cancellation | Rating 7.6 804 reviews | |||
| PriceFrom $607 | Free Cancellation | Rating 7.6 1,291 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from United Kingdom to Illinois?
Finding the right flight to Illinois from United Kingdom is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.
Can I find flights from United Kingdom to Illinois with flexible booking policies on momondo?
Flights from United Kingdom to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from United Kingdom to Illinois?
momondo helps you find the best flight between United Kingdom and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from United Kingdom to Illinois right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of United Kingdom to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.