Chelsea are 8/13 with Sky Bet to lift the Europa League trophy for the first time after setting up a final with Benfica.
The Blues, bidding to be the first team to win the Champions League and Europa League back-to-back in that order, knocked out Swiss outfit Basel 5-2 on aggregate night.
They'll face Benfica, who are 6/5 to lift the trophy at Chelsea's expense, in Amsterdam on May 15 after the Portuguese side eliminated Fenerbahce in the other semi-final.
Sky Bet's football trader Chris Spicer said: "Rafa Benitez has made no secret of his desire to enhance his CV by winning the competition, as he did with Valencia when it was named the UEFA Cup.
"Benitez brings an extra edge to any side in European competition, so we're expecting them to get the job done in 90 minutes in Amsterdam and go 11/10 that they do so."