Quote Originally Posted by Twickster View Post
Bifrost doesn't work that way, its not an instant teleport and more a "tunnel" that one can exit before the intended destination. See Hela throwing Thor and Loki off the bifrost in Ragnarok.

Given this, this tactic is less than effective. Carol is completely fine in space, has feats of crossing intergalactic distances and can come back under her own power.

If its simply a match between Thor and Carol, barring a lucky Stormbreaker hit, Carol also ragdolls Thanos, who in turn ragdolls Thor. It's Carol's fight to lose.
I don't think that anything in the MCU has been directly stated to work on the intergalactic range (not counting the full powered Infinity Gauntlet's snaps) as of yet, so Carol's verifiable flight speeds are probably on the interstellar/galactic tier at best for now.