Question 1

What is the cheapest time of day to depart on your flight to London?

Accepted Answer

According to our data, the cheapest time of day to fly to London is in the afternoon. momondo users have found flights departing from Chicago to London in the afternoon for as low as ₹ 122,887. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to London are more costly in the evening, with an average ticket price of ₹ 144,938. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Question 2

What is the cheapest Chicago to London flight route?

Accepted Answer

Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago - London flight prices

Question 3

Can stopping save me money on Chicago to London flights?

Accepted Answer

You could potentially save up to 41% on your flight if you consider stops on a Chicago to London flight.

Question 4

How have Chicago to London flight prices changed over time?

Accepted Answer

As of July 2025, prices for Chicago to London flights are approximately 34% cheaper when compared to flights at the same time last year.

Question 5

What is the cheapest month to fly to London?

Accepted Answer

The month of February is, on average, the cheapest month to fly to London from Chicago, with most prices found around ₹ 56,137. The month of January is another great option to travel to London, with average flight prices from Chicago averaging around ₹ 57,696.

Question 6

What is the cheapest day to depart on your flight to London?

Accepted Answer

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as ₹ 90,772. On the other hand, Saturday is the most expensive day to depart from Chicago because it is more convenient for both business and leisure travellers. As a result, prices tend to be around ₹ 179,005.

Question 7

How far in advance should I book a flight to London?

Accepted Answer

You are more likely to see cheaper flights to London from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around ₹ 68,900 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Chicago for as low as ₹ 61,248 on momondo.

Question 8

What cabin class options are available on Chicago to London flights?

Accepted Answer

There are 3 cabin classes available to choose from on Chicago to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 9

When did momondo last update prices for flights from Chicago to London?

Accepted Answer

Prices for flights from Chicago to London are refreshed on a daily basis.

Question 10

How old do you have to be to fly from Chicago to London?

Accepted Answer

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 Chicago to London.

Question 11

What documentation or ID do you need to fly to London?

Accepted Answer

The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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What is the cheapest month to fly to London?

The month of February is, on average, the cheapest month to fly to London from Chicago, with most prices found around ₹ 56,137. The month of January is another great option to travel to London, with average flight prices from Chicago averaging around ₹ 57,696.

What is the cheapest day to depart on your flight to London?

What is the cheapest time of day to depart on your flight to London?

What is the cheapest Chicago to London flight route?

Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago - London flight prices

How far in advance should I book a flight to London?

What cabin class options are available on Chicago to London flights?

There are 3 cabin classes available to choose from on Chicago to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago to London flights?

You could potentially save up to 41% on your flight if you consider stops on a Chicago to London flight.

How have Chicago to London flight prices changed over time?

As of July 2025, prices for Chicago to London flights are approximately 34% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to London

Cheap Chicago to London (CHI to LON) flight deals and tips

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How far is Chicago to London by plane?

When did momondo last update prices for flights from Chicago to London?

How old do you have to be to fly from Chicago to London?

What documentation or ID do you need to fly to London?

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Best airlines flying from Chicago to London

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