Originally Posted by
LondonElite
Many/most countries will not let you in/transit. Just fly direct for your sake and others'. I don't think any reasonable routing will offer you champagne and caviar at the moment, all fairly pared back service, in part to minimise contact.
AA does offer their full service at the moment. The OP could easily fly ORD-MIA/DFW-LHR with having the full service on the transatlantic leg without involving any other country.
Also, Qatar does allow transfer passengers.
However, I'm not sure of the policy of Spain ( Iberia ) and Ireland ( Aer Lingus ).