Transcontinental Air Transport (TAT) was an early airline service in the United States, established in 1929. It was notable for being the first to offer a coast-to-coast air service, connecting cities like New York and Los Angeles. TAT utilized a combination of air and rail travel, allowing passengers to complete their journeys efficiently. The airline played a significant role in the development of commercial aviation, demonstrating the potential for long-distance air travel. TAT was eventually absorbed into American Airlines in 1930, but its innovative approach laid the groundwork for future air travel services across the country.