Finding cheap flights to Reykjavik often depends as much on flexibility as on the headline fare. Prices can shift around Iceland’s busy summer season, school holidays, Christmas and popular winter weekends, so travelling outside peak periods may give you more choice. If your plans allow, compare several nearby departure dates rather than searching for one fixed day, and look at both short breaks and slightly longer stays to see how the overall fare changes.

It is also worth widening the airport search beyond your usual UK departure point. Fares from London, Manchester, Edinburgh, Glasgow or other regional airports can differ, although availability varies by season and date. International flights for Reykjavik generally arrive at Keflavík, some distance from the city, so include the cost and convenience of the onward transfer when judging whether a lower fare is genuinely better. An airport change or lengthy journey from home may also outweigh a small saving.

Booking timing matters particularly when travelling during busy periods, when seats can become limited as demand builds. For quieter dates, monitoring fares and setting alerts can help you spot a useful drop without committing immediately. Check the final price carefully, including baggage, seat selection and any change fees, since the cheapest initial option may not remain the best-value choice.

When comparing flights to Reykjavik from the UK, start by checking which departure airports are practical for you, as fares and available itineraries can vary between London and regional airports. A nearby airport may not offer the most convenient journey overall once rail travel, parking, airport transfers and luggage costs are included. It is also worth comparing non-stop and connecting options by total travel time, connection length, baggage allowance and the conditions for changing or cancelling the booking.

Although searches may describe the destination as Reykjavik, many international services arrive at Keflavík International Airport, which is outside the capital rather than in central Reykjavik. Check the airport named in the itinerary before booking, particularly if you are arranging accommodation, a hire car or onward transport. Airport coaches and private transfers connect Keflavík with Reykjavik, while taxis and rental cars are other options; allow for the journey into the city when comparing arrival times.

Reykjavik Airport is closer to the city centre and is primarily used for domestic and some regional services, so it may appear in searches involving onward Icelandic flights rather than as the main arrival point from the UK. If your itinerary includes a separate connection, check whether you need to travel between the two airports and leave sufficient time for that transfer.