https://kids.guinnessworldrecords.com en

First double swim crossing of the English Channel (male)

First double swim crossing of the English Channel (male)
Who
Antonio Abertondo
What
First
Where
English Channel
When
22 September 1961
The first double crossing of the English Channel was by Antonio Abertondo (Argentina), in 43 hr 10 min on 20-22 September 1961. CS&PF list this as the Longest time (2-way).