Fly from
Fly to
Budget
£350 - £497
Route
Depart
Return
Price
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Fri 17/1
1 stop25h 20m
Chicago O'Hare Intl
Sun 26/1
1 stop14h 50m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Mon 10/3
1 stop11h 05m
Chicago O'Hare Intl
Tue 25/3
1 stop19h 00m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Fri 22/11
1 stop15h 30m
Chicago O'Hare Intl
Sun 1/12
1 stop20h 15m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Sat 23/11
1 stop20h 58m
Chicago O'Hare Intl
Mon 25/11
1 stop15h 43m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Mon 25/11
1 stop14h 00m
Chicago O'Hare Intl
Tue 3/12
1 stop18h 05m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Tue 5/11
2 stops34h 35m
Chicago O'Hare Intl
Tue 12/11
2 stops20h 45m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Tue 5/11
1 stop13h 43m
Chicago O'Hare Intl
Mon 9/12
1 stop15h 04m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Mon 4/11
1 stop11h 10m
Chicago O'Hare Intl
Mon 9/12
1 stop10h 10m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Mon 3/2
1 stop13h 35m
Chicago O'Hare Intl
Thu 20/2
Nonstop7h 35m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Mon 25/11
Nonstop8h 50m
Chicago O'Hare Intl
Thu 5/12
Nonstop7h 40m
London HeathrowChicago O'Hare Intl
LHR - ORD
LHRORD
London Heathrow
Mon 18/11
Nonstop9h 25m
Chicago O'Hare Intl
Mon 2/12
Nonstop8h 05m
London HeathrowChicago Midway
LHR - MDW
LHRMDW
London Heathrow
Tue 26/11
1 stop13h 04m
Chicago Midway
Thu 5/12
1 stop10h 48m
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Illinois (average of £601). Flying from London Heathrow Airport to Illinois in July is currently the most expensive (average of £775). 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.
When flying from London Heathrow Airport 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.
The most flights from LHR to USIL are scheduled on a Monday (60 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (60 on average).
In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.
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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.
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