His close-range volley after Gus Poyet's header was saved by David James secured the 1-0 win at Upton Park and was the first goal on his travels since August 1999.
Les had to take a bit of stick from his team-mates after revealing the full extent of his away-day drought in the dressing room.
He said: "I haven't scored an away goal for two years but in one of those seasons I was out of the team for a long time through injury.
"The records don't show that though, just that I hadn't scored for two years.
"I'm quietly confident that if I get on with my job things will fall into place."
Les has been in fine form alongside Teddy Sheringham all season and the partnership has now yielded eight goals in the Premiership.
He insists that our new playing system, the continuity of side and the pressure of having to perform with the likes of Sergei Rebrov and fit-again Steffen Iversen around have all contributed to what has been, so far, his best season in a Spurs shirt.
Les added: "The manager has come in and changed the way we play and the fortunate thing for us is that the team has been functioning well and there hasn't been that many changes.
"We've been more or less fielding the same team and the level of performances have proved that.
"You've got to play well. What you want to do is get the best out of yourself week in, week out.
"You will have off games but if you can be on your game more than off you have a better chance. Fortunately I've been able to do that this season."
Paul Miles at Upton Park
Les Ferdinand is confident he won't have to wait so long for his next away goal after grabbing the winner at West Ham.