People have mentioned returning Odo via slipstream. Just how fast is slipstream? How long would it take?
Depends on the portrayal. "Hope and Fear" put it at 20,000 light-years per month, but "Timeless" had Voyager
cover 10,000 light-years in a couple of minutes. The VGR relaunch has assumed it's somewhere in between those, requiring maybe a couple of weeks to reach the nearest edge of the Delta Quadrant (about 30 kly away). In any case, it would take no more than a few months tops to reach the Dominion.