But also right in the running is Daniel Ricciardo, the in-house candidate who, like Vettel before him, would win his place after serving time at Red Bull's junior team Toro Rosso.
Nico Hulkenberg, the Sauber driver who might be first in line to replace Raikkonen should the famous Finn leave Lotus, actually thinks the rising Ricciardo should get the nod.
"I would pick him," the German is quoted by Auto Motor und Sport.
"Daniel is a fast guy, and finally a young driver would get the chance to prove himself."
Meanwhile, Toro Rosso team boss Franz Tost insists Ricciardo's candidature for the plum Red Bull seat should not reflect badly on Jean-Eric Vergne.
"Jean-Eric is a driver who is very good and has a lot of skill," he told Brazil's Totalrace.
"The only reason Daniel is being tipped for the job and not him is just the question of experience -- he has done 13 races more than Vergne, which is practically a season," Tost insisted.