Cheap flights from Indianapolis to London from $325

The cheapest month to fly to London from Indianapolis is in March. Flight prices, which tend to average around $87, are often lower during this time because this is during the off-season. The month of November is another great option to travel to London, with average flight prices from Indianapolis averaging around $95.

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 $819 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 $659 on momondo.

You could potentially save up to 10% on your flight if you consider stops on a Indianapolis to London flight.

As of May 2026, prices for Indianapolis to London flights are approximately 22% more expensive when compared to flights at the same time last year.

Air Canada, Delta, and United Airlines 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 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: 32% 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 20m.