Maybe a strange question but....
We have a choice of flying into CDG or Heathrow for our couple weeks.
We have an apartment confirmed in Paris from 20 April to 27 April.
My question is:
Fly into CDG and almost immediately take the Eurostar from CDG to London, spend a week and then Eurostar back to CDG & Paris.
Fly into Heathrow, send a week and then Eurostar to Paris for the week and then return to London for a flight back to the US.
FWIW we must do a round trip from the US due to using limited rewards miles.