Given how the Biden administration was against the Pelosi visit (as per the Washington Post), I can't see Biden approving of yet another pointless and counterproductive stunt by Lithuania, if Lithuania is serious about this. Nothing good will come out of it for Taiwan, China or the US.
So if we have both China and the US opposing the Lithuanians, there is literally no way for them to get to Taiwan.
No country will allow them passage through their airspace. That leaves the Malacca Straits or the Bering Straits, but who will allow the plane to land and refuel, given the combined opposition of China and the US?
And does any country really want the US and China to escalate against each other?
@Blitzo
This is how future visits to Taiwan are discouraged or blocked.