the Phoenecians sailed around Africa and up to the British Isles by 500BC. So it is theoretically possible, although they did hug the coast
As far as the possibility that Egyptians sailed here, see "the Ra Expeditions" by Thor Heyerdahl
Barry Fell wrote a classic book on possible contacts in antiquity up until the Vikings.
there are many "anomalies" here that suggest some kind of contact, but considering that Colombus barely made it here in much more advanced ships - and the problem was food and particularly water running out on such a long voyage across empty ocean, especially in a blown off course scenario where they were unprepared - it's remotely possible that someone made it here, and then either stayed, or was lost trying to return home.....again, for someone unfamiliar with the crossing, the prevailing westerlies have to have found at a certain latitude, or else the ship ends up in the doldrums and everyone dies.
Years ago, I took a 300 level college course on prehistoric Amerind archaeology, and the professor focused on these anomalies. there's some real "oak island" type shit which opens up many questions. That's what started my interest in the topic.