Business class, also called executive class seats, which are usually purchased by those traveling for business and which are usually a higher quality of seats. First class seats, which offer the most comfortable accommodations available and are generally more expensive than all other types of seats. Business-class seat on a Cathay Pacific Airbus A330-300. Business class is a travel class available on many commercial airlines and rail lines, known by brand names which vary, by airline or rail company. In the airline industry, it was originally intended as an intermediate level of service between economy class and first class, but many airlines now offer business class as the highest level
Generally, first class travel is more expensive than business class; however, a business class international ticket will likely be more expensive than a first class domestic ticket. When comparing business class vs first class, the greatest differences are found in international flights.
Airlines. Traditionally, an airliner is divided into, from the fore to aft, first, business, and economy classes, sometimes referred to as cabins. In recent years, some airlines have added a premium economy class as an intermediate class between economy and business classes.

Portugal is a beautiful country and definitely worth the visit. If you're planning how you want to get to Portugal (or other European countries), TAP Airlines is probably an option. Here's what you can expect if you choose to fly TAP Portugal Business Class, which they call Executive.

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executive class vs business class