Trying to find a connection on ITN's website from JFK to SEA I found a flight with EVA AIR's 747-400.
I was pretty amazed to find a non-US carrier offering a US flight. Strangely though I couldn't get the price of that connection. It made me wonder if actually any non-US carrier is allowed to sell tickets for US-flights.
Something I noticed only in Europe (an example is Air Namibias 747 service between FRA and LHR).
Are there any other US routes offered by non US-carriers? If not, why not? Can US airlines sell tickets for their European connection flights?