Cheap flights from Illinois to the United Kingdom from $193
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 7/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Round-trip
1 adult
Economy
0 bags
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Round-trip
One-way
Last minute
Direct
Cheap round-trip flights
KAYAK's recommended round-trip deals from the most popular airlines that fly from Illinois to the United Kingdom.
Cheap one-way flights
Flying one-way? These are some of the best deals recently discovered on momondo for flights from Illinois to the United Kingdom.
Cheap last minute flights
Planning a quick getaway from Illinois to the United Kingdom? These are the last-minute flight deals available now.
Cheap direct flights
If you prefer a non-stop journey, check out our latest direct flight deals to the United Kingdom, so you can enjoy a seamless trip without layovers.
KLM flights from Illinois to United Kingdom
Our best KLM deals on Illinois to United Kingdom flight tickets
KLM![KLM]()
May 6![KLM]()
May 15
ORD5:05 pmChicago O'Hare Intl
9h 50m
1 stop
LHR8:55 amLondon Heathrow
LHR6:30 amLondon Heathrow
13h 40m
1 stop
ORD2:10 pmChicago O'Hare Intl
KLM![KLM]()
Apr 22![KLM]()
Apr 30
ORD1:15 pmChicago O'Hare Intl
11h 30m
1 stop
LHR6:45 amLondon Heathrow
LHR6:30 amLondon Heathrow
14h 10m
1 stop
ORD2:40 pmChicago O'Hare Intl
Delta flights from Illinois to United Kingdom
Our best Delta deals on Illinois to United Kingdom flight tickets
Delta![Delta]()
Apr 22![Delta]()
Apr 30
ORD3:30 pmChicago O'Hare Intl
16h 00m
1 stop
LHR1:30 pmLondon Heathrow
LHR9:00 amLondon Heathrow
12h 00m
1 stop
ORD3:00 pmChicago O'Hare Intl
Delta![Delta]()
Apr 29![Delta]()
Sep 9
ORD10:25 amChicago O'Hare Intl
15h 40m
1 stop
LHR8:05 amLondon Heathrow
LHR6:30 amLondon Heathrow
13h 40m
1 stop
ORD2:10 pmChicago O'Hare Intl
See travel insights to the United Kingdom from
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
Prices
Airlines
Other information
What is the cheapest month to fly to United Kingdom?
In general, February is the cheapest month to fly from Illinois to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $651. If you aren’t able to travel to United Kingdom during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $659.
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 when prices can be found for as low as $772. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $885.
What is the cheapest time of day to depart on your flight to United Kingdom?
According to our data, the cheapest time of day to fly to United Kingdom is in the morning. momondo users have found flights departing from Illinois to United Kingdom in the morning for as low as $728. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly in the evening, with an average ticket price of $835. 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 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 3 weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $784 when searching 3 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 $712 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?
Icelandair and TAP AIR PORTUGAL are the most popular carriers operating from Illinois to United Kingdom
What airlines fly to United Kingdom?
British Airways, Iberia and American Airlines 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 42% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 18 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?
The number of flights available between Illinois and United Kingdom is 54 per day as of April 2025. The most frequent departure time is 9:00PM, with 65% of daily flights leaving in the evening.
How many flights depart from Illinois to United Kingdom on average per week?
As of April 2025, there are 379 flights per week flying from Illinois to United Kingdom. The most common day of the week flights depart is Thu, with 15% of flights taking off 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 | $193 |
|---|---|
Fastest flight time | 7h 35m |
Direct flights | Every day |
Airports in United Kingdom | 5 airports |
When did momondo last update prices for flights from Illinois to United Kingdom?
Prices for flights from Illinois to United Kingdom are updated daily.
How many operators does momondo search for flights from Illinois to United Kingdom?
As of April 2025, there are 18 operators available to choose from for flights from Illinois to United Kingdom.
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?
momondo data reveals that the most frequently booked plane model on the route from Illinois to United Kingdom is Boeing 787-9 Dreamliner, representing 41.57% of all bookings. The subsequent popular models are Boeing 777 at 19.21%, Boeing 787-10 Dreamliner at 17.76%, and Boeing 767-300 at 8.08%.
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 7.5 1,580 reviews | |||
| PriceFrom $381 | Free Cancellation | Rating 7.3 1,335 reviews | |||
| PriceFrom $467 | Free Cancellation | Rating 6.7 7,012 reviews | |||
| PriceFrom $468 | Free Cancellation | Rating 7.0 482 reviews | |||
| PriceFrom $506 | Free Cancellation | Rating 7.1 1,837 reviews | |||
| PriceFrom $516 | Free Cancellation | Rating 7.3 2,926 reviews | |||
| PriceFrom $543 | Free Cancellation | Rating 7.0 1,063 reviews | |||
| PriceFrom $554 | Free Cancellation | Rating 7.0 9,142 reviews | |||
| PriceFrom $559 | Free Cancellation | Rating 7.6 1,269 reviews | |||
| PriceFrom $571 | Free Cancellation | Rating 7.8 1,329 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Illinois to United Kingdom?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to United Kingdom for you.
Can I find flights from Illinois to United Kingdom with flexible booking policies on momondo?
Yes. All flights to United Kingdom from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Illinois to United Kingdom?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to United Kingdom from Illinois.
I’m not ready to book a flight from Illinois to United Kingdom right now. Can momondo alert me if prices change?
Price alerts on flights to United Kingdom from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.
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Find better results for your trip to the United Kingdom
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