$396+ Cheap flights from London (LON) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from London to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from London to Illinois
Keep the following information in mind while searching for London to Illinois flight deals. Data was last updated junio 23, 2025.
Round-trip from | $557 (Air Canada) |
|---|---|
One-way from | $396 (Kiwi.com) |
Popular in | August |
Cheapest in | February |
Average price | $721 |
Good round-trip deal | $644 or less |
Good one-way deal | $589 or less |
Find flight deals from London to Illinois
Cheapest flights from London to IllinoisExplore the most affordable flight options available from London to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 23, 2025.
Explore the most affordable flight options available from London to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 23, 2025.
This Air Canada deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This SWISS deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This SWISS deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This oojo deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This ChecknFly deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Icelandair deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This ChecknFly deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Gotogate deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Expedia deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from London to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 23, 2025.
Use the filters below to find and compare flights from London to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonChicago
LHR - ORD
LHRORD
London Heathrow
vie. 9/5
9:30 am-6:12 pm
2 stops14h 42m
Chicago O'Hare Intl
jue. 9/11
1:55 pm-6:30 am
1 stop10h 35m
LondonChicago
LCY - ORD
LCYORD
London City
vie. 10/31
9:25 am-5:15 pm
1 stop12h 50m
Chicago O'Hare Intl
sáb. 11/8
7:05 pm-5:05 pm
1 stop16h 00m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
mié. 12/3
6:50 am-12:10 pm
1 stop11h 20m
Chicago O'Hare Intl
mar. 12/9
3:45 pm-5:55 am
Nonstop8h 10m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
mié. 8/13
7:50 pm-1:10 pm
1 stop23h 20m
Chicago O'Hare Intl
vie. 8/22
6:00 pm-10:55 pm
1 stop22h 55m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
sáb. 11/22
6:40 pm-12:45 pm
1 stop24h 05m
Chicago O'Hare Intl
lun. 12/1
9:30 pm-5:50 pm
2 stops38h 20m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
mar. 10/7
2:00 pm-6:43 pm
1 stop34h 43m
Chicago O'Hare Intl
jue. 10/16
1:03 pm-10:00 am
1 stop14h 57m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
jue. 10/9
8:30 am-3:04 pm
1 stop12h 34m
Chicago O'Hare Intl
lun. 10/13
6:00 pm-7:40 pm
1 stop19h 40m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
lun. 12/1
12:15 pm-5:20 pm
1 stop11h 05m
Chicago O'Hare Intl
lun. 1/12
6:30 pm-10:50 am
1 stop10h 20m
LondonChicago
LCY - ORD
LCYORD
London City
mié. 9/10
8:45 am-2:55 pm
1 stop12h 10m
Chicago O'Hare Intl
mié. 9/17
3:05 pm-4:25 pm
1 stop19h 20m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
lun. 9/1
3:40 pm-9:15 pm
1 stop11h 35m
Chicago O'Hare Intl
lun. 9/15
7:25 pm-2:35 pm
1 stop13h 10m
Best time to book a flight from London to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from London with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London to Illinois
What is the cheapest month to book a flight from London to Illinois?
Currently, August is the cheapest month in which you can book a flight from London to Illinois (average of $245). Flying from London to Illinois in March is currently the most expensive (average of $320). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LON to IL?
Find hourly flight availability from London to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 23, 2025.
When flying from London to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from London to Illinois
Explore weekly flight availability from London to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated junio 23, 2025.
The most flights from LON to USIL are scheduled on a Saturday (48 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (41 on average).
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated junio 23, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Air Transat from London to Illinois to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Boarding
Food
Crew
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Food
Crew
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Food
Crew
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Food
Crew
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Food
Crew
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Food
Crew
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from London to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for London to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from London to Illinois
Discover the top 10 airlines that operate flights from London to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 23, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$390 | Average$564 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$462 | Average$569 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$483 | Average$789 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$538 | Average$794 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$551 | Average$769 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$568 | Average$711 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$582 | Average$784 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$582 | Average$794 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$586 | Average$987 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$607 | Average$838 | FlexibilityNo cancel fee | On-time76% |