Logistics of Ravens vs Commanders

I suspect that the DC, Baltimore, Philly, and NY teams could charter an Amtrak train to get to the area and then a bus from the train station to the stadium, but that's just a guess.
I know for sure Philly charters a train for Washington away games as I saw some video coverage of it once.

As for the OPs question, many teams stay at a team hotel for home games too so it's not much different as I see it.