Route notes
Why this routing works
This multi-stop itinerary keeps the routing simple: depart Charleston, stop in New York City for 4 nights, continue to London for 16 nights, then return to Charleston. With just two stop points before the final return, it fits travelers who want a straightforward transatlantic sequence without adding extra flight segments.
The timing is balanced around a shorter domestic stop followed by a longer stay overseas, which can make ticketing more efficient than pricing each leg separately. Building this as one economy multi-stop ticket also keeps the full route tied together from departure through return.
At 3 weeks total, the schedule leaves most of the trip length in London while still carving out time in New York City on the outbound side. A March departure places the itinerary in the Jan-Mar season, which is useful when comparing date flexibility and overall trip timing against similar multi-stop options.