Which airlines were competitors for international routes in the late twenties and thirties?

During the late 1920s and 1930s, the development of international air travel was gaining momentum, and several airlines emerged as key players in this expanding market. Lufthansa, the German airline founded in 1926, was instrumental in establishing international routes within Europe and beyond. Pan American World Airways, often referred to as Pan Am, played a pioneering role in transcontinental and transoceanic flights, particularly between the United States and other parts of the world.

Both Lufthansa and Pan Am were focused on developing their international route networks, engaging in significant competition to secure lucrative markets, such as transatlantic flights and routes throughout Latin America. Their rivalry not only contributed to advancements in aviation technology and service standards but also to the broader growth of global aviation infrastructure during that era.

The other options do not align with the historical context of the late twenties and thirties for international airlines. For instance, American Airlines and Delta primarily focused on domestic routes at that time, while United and Southwest Airlines didn't engage in international competition during that period, as Southwest was not established until 1967 and United was more centered on domestic routes. Similarly, Eastern Airlines and Alaska Airlines had limited operations related to international routes, focusing more on domestic services and, in the