Cheap flights from Indianapolis to London from £175

The cheapest month to fly to London from Indianapolis is in October. Flight prices, which tend to average around £521, 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 £545.

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 £614. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Indianapolis to London for around £650.

The cheapest time of day to fly to London is in the morning when flights can be purchased for as low as £610. Flights in the afternoon are often more expensive, with an average ticket price of £677.

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 £616 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 Indianapolis for as low as £495 on momondo.

You could potentially save up to 40% 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 19% cheaper when compared to flights at the same time last year.

Dublin (DUB) was the most common stop: 80% of momondo users choosing one-stop flights on this route connected there.

Flights via Dublin (DUB) offer the lowest average return price of £492.

Flights connecting via Philadelphia (PHL) have the shortest average one-way travel time: 9h 53m.

Philadelphia (PHL) has the shortest average stopover time for this route: 1h 17m.