Spaceman Garrard is the third pilot to attempt the trip to the binary star system of Alpha Centauri using the FTL drive invented by Dolph Haertel (the next Einstein!) The Haertel Complex stories provide little in the way of actual time travel, but this one does have minor relativistic time dilation and more significant differing time rates.

Sylva—an heiress who is used to getting her way—devises a plan to (sort of) save her terminally ill lover, Guy Gibbon.

A moving story of an outcast boy who continued to feel the pain of how he’d been excluded throughout his adult life. You’ll need to decide for yourself whether time travel creeps in.

When all eleven families on Redford Crescent receive a newspaper from the middle of next week, the result is a hastily called neighborhood meeting and an assortment of get-rich-quick plans.

Wall Street investor Noel Breckenridge has been summoned to the far future, possibly to tell stories, but is there a larger purpose?

With eleven years of marriage behind them, Ted and Alice’s fantasies frequently start with a time machine and end with killing one or another of their spouse’s ancestors before they can procreate. So naturally, they each end up at Temponautics, Ltd. Oh, and Ted’s grandpa has some racy fantasies of his own.
In Silverberg’s Something Wild Is Loose (Vol. 3 of his collected stories), he posits that this story is “probably the most complex short story of temporal confusion” since Heinlein’s “By His Bootstraps” (1941) or “—All You Zombues—” (1959), but I would respectfully disagree. In particular, I would describe Heinlein’s two stories as the most complex short stories of temporal consistency in that there is but a single, static timeline and (in hindsight) every scene locks neatly into place within this one timeline. By contrast, Silverberg story involves multiple time travel choices by the characters in what I would call parallel universes. The confusion, such as it is, stems more from what appears to be alternate scenes in disconnected universes rather than temporal confusion per se.