Portal Creation – The ability to create wormholes, discs or other spatial portals for transport between two non-adjacent locations.
Sidewinder (Marvel) has a cloak that acts a portal to one rather than multiple dimensions (Official Handbook of the Marvel Universe V1 #10).
Spot (Marvel) is a supervillain that has this power.
Spot plays portal hit and run in Jessica Jones #2.
Eden Fesi (Marvel) uses a portal to aid the Black Panther in Black Panther V6 #12.
The Time Traveler explains his portals in Micronauts #9 (IDW).
Brother Voodoo (Marvel) creates a portal with demon’s blood in Uncanny Avengers V3 #15.
Warp (DC) is a supervillain that has this power (DC Who’s Who V1 #25).
Isotope (Image) makes mini black holes that act as portals (Official Handbook of the Invincible Universe #1).
Twilight (Dakotaverse) has a body that serves as living portal (Milestone Media Universe Card Set).
Gate (Malibu) can create portals that can move huge amounts of material in the Ultraverse (1993 SkyBox Ultraverse).
Richard Wizard can create portals as shown in T.H.U.N.D.E.R. Agents #6 (Tower).
Slarecian Gatekeeper – Creature Collection II. Dark Menagerie
The Shi’ar Imperial Guard includes Voyager (Marvel) who uses portals for transport and offensively by creating vortexes to suck opponents into portals.
Apparently drunkenness can open a portal that monsters can use to enter our world in Adventures into Terror #18 (Atlas).
Bizarre Adventures V1 #32 suggests the great deluge might have something to do with a portal from another dimension.