In 2019, almost three million visitors arrived from the UK and this year there are three percent more airline seats available than pre-pandemic.
The EU reportedly has plans to automate the passport procedure but until then Britons could face lengthy queues.
Britons must make sure that their passport is stamped on entry and exit to Spain or the EU could assume they overstayed.
Overstaying the 90 out of every 180 days limit could result in fines, travel bans or detainment for Britons.