Cheap flights from Indianapolis to London from $258

The cheapest month to fly to London from Indianapolis is in September. Flight prices, which tend to average around $700, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Indianapolis averaging around $705.

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 $848 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 $736 on momondo.

You could potentially save up to 52% on your flight if you consider stops on a Indianapolis to London flight.

As of July 2026, prices for Indianapolis to London flights are approximately 53% cheaper when compared to flights at the same time last year.

Delta, United Airlines, and SWISS are the most popular carriers operating from Indianapolis to London

British Airways, American Airlines and United Airlines 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 46% 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: 45% of momondo users choosing 1-stop flights on this route connected there.

Flights via New York (JFK) offer the lowest average round-trip price of $488.

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 9h 58m.

Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 13m.