A station (7) for sealing thermoformed containers for a packaging line, comprising a sealing carousel (71) which can rotate continuously about a central axis (H) which comprises a plurality of sealing heads (72) which are radially spaced apart from said central axis (H), each sealing head (72) being adapted to: - receive at least one container to be sealed at a first, input, peripheral region, which is outside the sealing carousel (71); - receive at least one closing seal at a second, input, peripheral region, which is outside the sealing carousel (71); - hold the closing seal (S) and the container during the rotation of the sealing carousel (71) and couple them together; - release the container complete with the closing seal at a third, output, peripheral region, which is outside the sealing carousel (71) and angularly spaced from the first and from the second region; the invention also relates to a method of sealing containers.