Cheap flights from London Heathrow Airport to Reykjavik from £80

If you aren’t able to travel during the month of December, then book flights to Reykjavik from London Heathrow Airport during June instead. Flights to Reykjavik in June, while not as cheap as those in December, still average around £50.

On average, the least expensive day to fly to Reykjavik from London Heathrow Airport is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £331. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Reykjavik for around £401.

Our most recent data shows that the best time of day to fly to Reykjavik is in the morning. Flights from London Heathrow Airport to Reykjavik during this time can be as low as £317. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £494 on average. Flights to Reykjavik from London Heathrow Airport at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from London Heathrow to Reykjavik Keflavik Intl for the best London Heathrow - Reykjavik flight prices

You are more likely to see cheaper flights to Reykjavik from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Reykjavik for around £239 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Reykjavik from London Heathrow Airport for as low as £182 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to Reykjavik flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

British Airways, KLM, and Scandinavian Airlines are the most popular carriers operating from London Heathrow to Reykjavik

Icelandair, British Airways and Scandinavian Airlines are the top three most popular airlines that fly to Reykjavik from London Heathrow Airport according to our data. Icelandair is the first choice among our users, with 62% of people opting to fly with this airline when travelling to Reykjavik. Keep in mind that there are 3 different airlines that fly to Reykjavik on a routine basis, so you have a few additional options to choose from.

Historically, on average around 9% of flights between London and Reykjavik have experienced a delay on any given week. The average delay length over the past 12 months has been 110 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Monday is statistically the day of the week that experiences the fewest delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.

Copenhagen (CPH) was the most common stop: 75% of momondo users choosing one-stop flights on this route connected there.

Flights via Copenhagen (CPH) offer the lowest average return price of £214.

Flights connecting via Copenhagen (CPH) have the shortest average one-way travel time: 8h 47m.

Copenhagen (CPH) has the shortest average stopover time for this route: 10h 06m.

The number of flights available between London Heathrow Airport and Reykjavik is 8 per day as of May 2026. The most frequent departure time is 13:00, with 47% of daily flights leaving in the afternoon.

As of May 2026, there are 60 flights per week flying from London Heathrow Airport to Reykjavik. The most common day of the week flights depart is Wed, with 23% of flights taking off on this day.