2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/224373We study the classical and quantum wormholes for a flat {\it Euclidean} Friedmann-Robertson-Walker metric with a perfect fluid including an ordinary matter source plus a source playing the role of dark energy (decaying cosmological term). It is shown that classical wormholes exist for this model and the quantum version of such wormholes are consistent with the Hawking-Page conjecture for quantum wormholes as solutions of the Wheeler-DeWitt equation.8 pages, 4 figures, accepted for publication in IJTPGeneral Relativity and Quantum CosmologyClassical and quantum wormholes in a flat $Λ$-decaying cosmologytext