Cheap flights from the United Kingdom to Illinois from £228
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 3/3. 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, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise 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 the United Kingdom to Illinois
Recent return flight deals from the United Kingdom to Illinois
Recent one-way flight deals from the United Kingdom to Illinois
Recent last minute flight deals from the United Kingdom to Illinois
Recent direct flight deals from the United Kingdom to Illinois
Aer Lingus flights from United Kingdom to Illinois
Our best Aer Lingus deals on United Kingdom to Illinois flight tickets
Finnair flights from United Kingdom to Illinois
Our best Finnair deals on United Kingdom to Illinois flight tickets
See travel insights to Illinois from
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 month of February is, on average, the cheapest month to fly to Illinois from United Kingdom, with most prices found around £462. 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 £511.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart on your flight to Illinois is on a Tuesday when prices can be found for as low as £660. This is often the case because there is less demand to fly during this day of the week. Flights from United Kingdom to Illinois on a Sunday will generally be more expensive and average around £719. 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 data shows that the cheapest United Kingdom to Illinois flights are usually those with departure times in the evening. Our users have found flights to Illinois in the evening for as low as £605. In the morning is when there is more demand to fly to Illinois, so prices are often more expensive at around £686 per ticket.
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 5 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around £592 when searching 5 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 £577 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.
How many flights depart from United Kingdom to Illinois on average per day?
The number of flights available between United Kingdom and Illinois is 29 per day as of February 2025. The most frequent departure time is 11:00, with 51% of daily flights leaving at midday.
How many flights depart from United Kingdom to Illinois on average per week?
As of February 2025, 206 flights take off from United Kingdom and land in Illinois each week. The most common flight departure day for this route is Mon, with 16% 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 17 operators available for flights from United Kingdom to Illinois as of February 2025.
How old do you have to be to fly from United Kingdom to Illinois?
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 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 24.68% of the total bookings. Other popular models include Boeing 787-10 Dreamliner with 21.66%, Boeing 777 with 21.36%, and Airbus A350-900 with 7.54%.
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 £340 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom £356 | Free Cancellation | Rating 7.1 1,070 reviews | |||
| PriceFrom £367 | Free Cancellation | Rating 7.4 1,470 reviews | |||
| PriceFrom £385 | Free Cancellation | Rating 7.3 1,317 reviews | |||
| PriceFrom £397 | Free Cancellation | Rating 7.1 1,857 reviews | |||
| PriceFrom £409 | Free Cancellation | Rating 6.6 6,779 reviews | |||
| PriceFrom £419 | Free Cancellation | Rating 7.5 658 reviews | |||
| PriceFrom £449 | Free Cancellation | Rating 6.7 7,040 reviews | |||
| PriceFrom £450 | Free Cancellation | Rating 7.4 8,892 reviews | |||
| PriceFrom £475 | Free Cancellation | Rating 7.5 785 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?
Once you have performed a search for United Kingdom to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from United Kingdom to Illinois right now. Can momondo alert me if prices change?
If you are not ready to book a flight from United Kingdom to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.