Search for cheap flights and last-minute deals with Netflights. We've scanned all the flights from London Heathrow to Mariehamn, across the one airlines that offer this route. We've found that 30 / May / 2025 is the cheapest date to travel at the moment, but it's best to go through the results to see which flight suits you.
Finnair is the most popular airline that flies from London Heathrow to Mariehamn. But it's still worth looking at other options, as there are five flights to Mariehamn every week. If you want to broaden your search, look at flights departing from other airports.
Your flight from London Heathrow to Mariehamn will take at least 7 hrs 10 mins. On average, it takes 7 hrs 10 mins to fly the 1585 km distance. Take a look at flight times to see which one works best for you.
You can also search by month, which will reveal the cheapest time of the week to fly.
