When traveling from London to Reykjavik, there are typically alternate options for departure airport, arrival airport, or both. Instead of landing at Reykjavik Keflavik Intl, there are routes available with WOW air that will take you to Reykjavik Domestic. Alternatively, if you are looking for more options when departing from London, consider London Gatwick which is the closest major airport to London Heathrow that offers WOW air flights.
Cheapflights users who travel with WOW air (a popular airline from London to Reykjavik) have rated them a 6.5/10. This rating comes from 227 reviews. If you are looking to travel LON-REK, search your dates above.