Cheap flights from Reykjavik Keflavik Intl Airport to London from £67

In general, December is the cheapest month to fly from Reykjavik Keflavik Intl Airport to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £159. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from Reykjavik Keflavik Intl Airport averaging around £195.

On average, the least expensive day to fly to London Heathrow Airport from Reykjavik Keflavik Intl Airport is on a Friday. momondo users have found tickets for Friday departures for as low as £177. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Monday is £820.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Reykjavik Keflavik Intl Airport to London Heathrow Airport in the afternoon for as low as £190. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £422 on average. Flights to London Heathrow Airport from Reykjavik Keflavik Intl Airport in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

There are 2 cabin classes available to choose from on Reykjavik Keflavik Intl to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 33% on your flight if you consider stops on a Reykjavik Keflavik Intl Airport to London Heathrow Airport flight.

Historically, on average around 9% of flights between Reykjavik and London have experienced a delay on any given week. The average delay length over the past 12 months has been 111 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.

Saturday 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, Icelandair have had the fewest delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

The number of flights available between Reykjavik Keflavik Intl Airport and London Heathrow Airport is 7 per day as of February 2026. The most frequent departure time is 16:00, with 52% of daily flights leaving at midday.

The number of flights available between Reykjavik Keflavik Intl Airport and London Heathrow Airport is 52 per week as of February 2026. The most frequent departure day is Fri, with 27% of weekly flights leaving on this day.