How to find the cheapest flight from
Illinois to London (LON)
How far in advance should I book a flight from Illinois to London?
When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 51 days in advance, which can save you up to 38% on flights from Illinois to London compared to booking the week you need them. Waiting 51 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 $813. For sooner than that we have options available in the next 3 days from $886.
What is the cheapest month to fly from Illinois to London?
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 $394.
One-way flights to London from Illinois
The cheapest one-way flights from Illinois to London
2:10 pm - 6:55 pm
TAP AIR PORTUGAL
1:38 pm - 11:35 am
3:30 pm - 7:45 am
Related info for your journey
Useful info, stats and facts about Illinois to London flights.
Arrival points for flights from Illinois to London
Destination information for London
Things to know before you go. Useful info for your trip from Illinois to London