Cheap flights from Illinois to London from $207
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 London departing on 4/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Illinois to London
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Lufthansa flights from Illinois to London
Our best Lufthansa deals on Illinois to London flight tickets
Scandinavian Airlines flights from Illinois to London
Our best Scandinavian Airlines deals on Illinois to London flight tickets
See travel insights to London from
How to get the cheapest flight ticket from Illinois to London
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 London?
The cheapest month to fly to London from Illinois is in February. Flight prices, which tend to average around $652, are often lower during this time because this is during the off-season. The month of November is another great option to travel to London, with average flight prices from Illinois averaging around $661.
What is the cheapest day to depart on your flight to London?
The cheapest day to depart from Illinois to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $779. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $892. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.
What is the cheapest time of day to depart on your flight to London?
Flying to London from Illinois in the morning is the least expensive time of day to depart. momondo users have found prices as low as $741 when looking at flights departing in the morning. Flights to London are more costly in the evening, with an average ticket price of $850. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Illinois to London flight route?
Fly from Chicago O'Hare Intl to London Heathrow for the best Illinois - London flight prices
How far in advance should I book a flight to London?
You are more likely to see cheaper flights to London from Illinois when booking 3 weeks ahead of your departure date. In general, you can expect to find flights to London for around $800 when searching 3 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Illinois for as low as $722 on momondo.
What cabin class options are available on Illinois to London flights?
There are 4 cabin classes available to choose from on Illinois to London 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 London?
Icelandair, WestJet, and JetBlue are the most popular carriers operating from Illinois to London
What airlines fly to London?
British Airways, Iberia and American Airlines are the top three most popular airlines that fly to London from Illinois according to our data. British Airways is the first choice among our users, with 40% of people opting to fly with this airline when traveling to London. Keep in mind that there are 15 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.
How many flights depart from Illinois to London on average per day?
As of February 2025, there are 37 flights per day flying from Illinois to London. The most common time of day flights depart is 5:00PM, with 67% of flights taking off in the evening.
How many flights depart from Illinois to London on average per week?
259 flights are operational weekly from Illinois to London as of February 2025. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.
Cheap Illinois to London flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to London
When did momondo last update prices for flights from Illinois to London?
Prices for flights from Illinois to London were last updated today.
How many operators does momondo search for flights from Illinois to London?
As of February 2025, there are 17 operators available to choose from for flights from Illinois to London.
How old do you have to be to fly from Illinois to London?
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 Illinois to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Illinois to London?
Based on momondo bookings for flights between Illinois and London, the leading plane model is Boeing 787-9 Dreamliner, making up 42.88% of the total bookings. Other popular models include Boeing 777 with 22.89%, Boeing 787-10 Dreamliner with 14.00%, and Boeing 767-300 with 9.61%.
Best airlines flying from Illinois to London
Compare and see reviews for airlines that fly from Illinois to London with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $381 | Free Cancellation | Rating 7.3 1,319 reviews | |||
| PriceFrom $451 | Free Cancellation | Rating 8.0 8,163 reviews | |||
| PriceFrom $464 | Free Cancellation | Rating 7.0 487 reviews | |||
| PriceFrom $506 | Free Cancellation | Rating 7.2 1,835 reviews | |||
| PriceFrom $516 | Free Cancellation | Rating 7.4 3,044 reviews | |||
| PriceFrom $547 | Free Cancellation | Rating 6.7 6,982 reviews | |||
| PriceFrom $554 | Free Cancellation | Rating 7.0 8,782 reviews | |||
| PriceFrom $565 | Free Cancellation | Rating 7.6 1,273 reviews | |||
| PriceFrom $581 | Free Cancellation | Rating 7.5 1,569 reviews | |||
| PriceFrom $581 | Free Cancellation | Rating 7.0 2,641 reviews |
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Illinois to London?
Finding the right flight to London 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 London quick and easy, saving you time and money.
Can I find flights from Illinois to London with flexible booking policies on momondo?
momondo does allow users to show only those flights to London 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 London?
momondo helps you find the best flight between Illinois and London 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 London right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Illinois to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.