This past March I booked a trip from my hometown in Virginia to Paris. The trip included visits to Malta, Sicily, and mainland Italy culminating in a flight from Rome to Paris thence back home. The transatlantic flight was booked as a round trip, as was the flight from my hometown to JFK (for the flight to Paris). All the other trips, CDG-MLA, MLA-PMO, PMO-NAP, ROM-CDG were booked individually in separate PNR's. The credit card used to purchase these flights has a trip interruption/cancellation benefit. In June, three weeks before departure I underwent surgery for a sudden back condition and was unable to make the trip. After contacting each airline I was denied a refund. I planned to file separate claims with the credit card company for each segment of the side trips. The first claim was denied for being one way travel without a return destination. When taken on an individual basis these flights are indeed one way with no return destination but taken in the aggregate it is clear the entire trip is indeed a round trip. I contacted American Airlines and received a very generous offer to exchange my non-refundable tickets for eVouchers, totaling close to $6,000. My question; do I have a case that my trip, even though consisting of several one way flight segments was round trip travel with a return destination? The 4 one way trips were booked on three different airlines separate and distinct from American Airlines. Thanks in advance for your input.