Cheap flights from Illinois to the United Kingdom from £142
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to the United Kingdom departing on 9/7. 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 Illinois to United Kingdom
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 United Kingdom?
The cheapest month to fly to United Kingdom from Illinois is in February. Flight prices, which tend to average around £482, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of February, then departing from Illinois during the month January is also very affordable. Most momondo users find prices during this month for around £494.
What is the cheapest day to depart on your flight to United Kingdom?
The cheapest day to depart from Illinois to United Kingdom is on a Wednesday. Travellers who choose to depart for United Kingdom on a Wednesday will often find tickets for as low as £547. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to United Kingdom for around £678.
What is the cheapest time of day to depart on your flight to United Kingdom?
The cheapest time of day to fly to United Kingdom is in the afternoon when flights can be purchased for as low as £606. Try not to purchase tickets at midday because they tend to be around £694. Of course, these prices can vary depending on the time of year and what airport you fly to.
What is the cheapest Illinois to United Kingdom flight route?
Fly from Chicago O'Hare Intl to London Heathrow for the best Illinois - United Kingdom flight prices
How far in advance should I book a flight to United Kingdom?
You are more likely to see cheaper flights to United Kingdom from Illinois when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around £597 when searching 16 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Illinois for as low as £529 on momondo.
What cabin class options are available on Illinois to United Kingdom flights?
There are 4 cabin classes available to choose from on Illinois to United Kingdom 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 Illinois to United Kingdom?
TAP AIR PORTUGAL and Icelandair are the most popular carriers operating from Illinois to United Kingdom
Which airlines fly to United Kingdom?
British Airways, Iberia and Icelandair are the top three most popular airlines that fly to United Kingdom from Illinois according to our data. British Airways is the first choice among our users, with 58% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 9 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.
How many flights depart from Illinois to United Kingdom on average per day?
As of June 2025, there are 58 flights per day flying from Illinois to United Kingdom. The most common time of day flights depart is 21:00, with 67% of flights taking off in the evening.
How many flights depart from Illinois to United Kingdom on average per week?
The number of flights available between Illinois and United Kingdom is 409 per week as of June 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.
Cheap Illinois to United Kingdom flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to United Kingdom
Best price found | £142 |
|---|---|
Fastest flight time | 7h 40m |
Direct flights | Every day |
Airports in United Kingdom | 4 airports |
When did momondo last update prices for flights from Illinois to United Kingdom?
Prices for flights from Illinois to United Kingdom are refreshed on a daily basis.
How many operators does momondo search for flights from Illinois to United Kingdom?
The number of operators available for flights from Illinois to United Kingdom is 10 as of June 2025.
How old do you have to be to fly from Illinois to United Kingdom?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to United Kingdom.
What documentation or ID do you need to fly to United Kingdom?
The required travel and health documents for your United Kingdom trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at United Kingdom. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Illinois to United Kingdom?
Based on momondo bookings for flights between Illinois and United Kingdom, the leading plane model is Boeing 787-9 Dreamliner, making up 41.43% of the total bookings. Other popular models include Boeing 777 with 18.30%, Boeing 787-10 Dreamliner with 18.14%, and Boeing 767-300 with 12.10%.
Best airlines flying from Illinois to United Kingdom
Compare and see reviews for airlines that fly from Illinois to United Kingdom with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £257 | Free Cancellation | Rating 7.0 502 reviews | |||
| PriceFrom £327 | Free Cancellation | Rating 6.6 7,031 reviews | |||
| PriceFrom £411 | Free Cancellation | Rating 7.1 1,123 reviews | |||
| PriceFrom £413 | Free Cancellation | Rating 7.6 1,292 reviews | |||
| PriceFrom £446 | Free Cancellation | Rating 7.0 2,778 reviews | |||
| PriceFrom £462 | Free Cancellation | Rating 7.4 8,810 reviews | |||
| PriceFrom £484 | Free Cancellation | Rating 6.8 7,158 reviews | |||
| PriceFrom £486 | Free Cancellation | Rating 7.4 653 reviews | |||
| PriceFrom £513 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Illinois to United Kingdom?
Finding the right flight to United Kingdom from Illinois 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 United Kingdom quick and easy, saving you time and money.
Can I find flights from Illinois to United Kingdom with flexible booking policies on momondo?
momondo does allow users to show only those flights to United Kingdom from Illinois which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Illinois to United Kingdom?
momondo helps you find the best flight between Illinois and United Kingdom 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 Illinois to United Kingdom right now. Can momondo alert me if prices change?
If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from Illinois and alert you when they change.