"The news has really got to me," Sauber reserve driver Giedo van der Garde, a Dutchman, said on Twitter.
"I've been on a MH flight from Amsterdam to KL often. Thoughts go out to everyone involved."
The shocking development will put more pressure on organisers of October's inaugural Russian grand prix, who were already fending off rumours the deepening Crimean crisis could force the race's cancellation.
At least 27 Australians were on the doomed flight MH17, and federal opposition leader Bill Shorten has described their deaths as "murder".
Prime minister Tony Abbott, meanwhile, called on Russia to "fully cooperation in this investigation", even though his counterpart Vladimir Putin is clearly blaming Ukraine.
"Undoubtedly," he said, "the state on whose territory this happened is responsible for this awful tragedy."