The men, named as Alexander Petrov and Ruslan Boshirov, told the RT channel that they went sightseeing in Salisbury but returned to London within an hour.
They are accused by the UK of trying to kill Russian ex-spy Sergei Skripal and his daughter Yulia in March.
The UK has described them as agents of Russia's military intelligence service, the GRU.
"The town was covered by this slush. We got wet, took the nearest train and came back" to London, they told RT, Russia's state-run international broadcaster.
