When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 11 days in advance, which can save you up to 3% on flights from Illinois to London compared to booking the week you need them. Waiting 11 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £510. For sooner than that we have options available in the next 3 days from £525.
Flights from Illinois to London lean towards being more expensive in June. Prices are generally better when you fly from Illinois to London in February, with the cheapest ticket starting at £343.
When flying from Illinois to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Fly from
Fly to
Budget
£385 - £456
Route
Depart
Return
Price
Chicago O'Hare IntlLondon Gatwick
ORD - LGW
ORDLGW
Chicago O'Hare Intl
Wed 6/11
1 stop13h 50m
London Gatwick
Tue 12/11
1 stop28h 55m
Chicago O'Hare IntlLondon Heathrow
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Fri 8/11
2 stops31h 25m
London Heathrow
Mon 11/11
1 stop17h 25m
Lambert-St LouisLondon Gatwick
STL - LGW
STLLGW
Lambert-St Louis
Tue 17/9
1 stop13h 25m
London Gatwick
Tue 24/9
1 stop28h 46m
Chicago O'Hare IntlLondon Heathrow
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Mon 19/8
1 stop16h 05m
London Heathrow
Sun 25/8
1 stop29h 50m
Chicago O'Hare IntlLondon Gatwick
ORD - LGW
ORDLGW
Chicago O'Hare Intl
Sun 11/8
1 stop14h 05m
London Gatwick
Wed 21/8
1 stop31h 05m
Chicago O'Hare IntlLondon Heathrow
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 25/9
Nonstop7h 50m
London Heathrow
Thu 3/10
Nonstop8h 40m
Chicago O'Hare IntlLondon Gatwick
ORD - LGW
ORDLGW
Chicago O'Hare Intl
Tue 24/9
1 stop14h 00m
London Gatwick
Wed 9/10
1 stop15h 00m
Chicago O'Hare IntlLondon Heathrow
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Mon 28/10
Nonstop7h 40m
London Heathrow
Tue 5/11
1 stop14h 05m
Chicago O'Hare IntlLondon Heathrow
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 6/11
Nonstop7h 40m
London Heathrow
Fri 15/11
1 stop14h 00m
No data available for this route at this time. Please check back soon.
Crew
Overall
Food
Entertainment
Comfort
Boarding
Reviews
Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Crew
Overall
Food
Entertainment
Comfort
Boarding
Reviews
Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Crew
Overall
Food
Entertainment
Comfort
Boarding
Reviews
Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Crew
Overall
Food
Entertainment
Comfort
Boarding
Reviews
Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Crew
Overall
Food
Entertainment
Comfort
Boarding
Reviews
Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Crew
Overall
Food
Entertainment
Comfort
Boarding
Reviews
Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
1%of flight departures | Early morningMidnight to 6 am |
---|---|
10%of flight departures | Morning6 am to noon |
49%of flight departures | AfternoonNoon to 6 pm |
40%of flight departures | Evening6 pm to midnight |
Cheapflights helps you search for flights from Illinois to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
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Certainly. Search results for flights to London from Illinois shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Yes, Cheapflights offers price alerts on Illinois to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.