Cheap flights from Indianapolis to London from $274

The cheapest month to fly to London from Indianapolis is in October. Flight prices, which tend to average around $692, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from Indianapolis averaging around $728.

The cheapest day to depart from Indianapolis to London is on a Tuesday. Travelers who choose to depart for London on a Tuesday will often find tickets for as low as $938. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,010. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from Indianapolis in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $882 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $1,018. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

You are more likely to see cheaper flights to London from Indianapolis when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $818 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Indianapolis for as low as $657 on momondo.

You could potentially save up to 44% on your flight if you consider stops on a Indianapolis to London flight.

As of March 2026, prices for Indianapolis to London flights are approximately 20% cheaper when compared to flights at the same time last year.

British Airways, Aer Lingus, and Delta are the most popular carriers operating from Indianapolis to London

British Airways, American Airlines and Iberia are the top three most popular airlines that fly to London from Indianapolis according to our data. British Airways is the first choice among our users, with 49% of people opting to fly with this airline when traveling to London. Keep in mind that there are 11 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Dublin (DUB) was the most common stop: 31% of momondo users choosing 1-stop flights on this route connected there.

Flights via Newark (EWR) offer the lowest average round-trip price of $533.

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 10h 02m.

Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 20m.