flight of regular lines
The term 'vuelo de líneas regulares' in Spanish refers to what is known in English as a 'regular flight.' This phrase is commonly used in reference to commercial aviation and airports. It entails a flight that operates on a regular, scheduled basis. For instance, an airline might have a 'vuelo de líneas regulares' from one city to another that departs and arrives at the same times on specific days of the week. This is in contrast to charter flights, which operate on an as-needed, non-scheduled basis.
The regular flight to Madrid leaves at 10 a.m.
This sentence talks about a regular flight, also known as a scheduled flight, to Madrid. Scheduled flights are those that run per a pre-determined schedule.
The price of the regular flight has increased this year.
This sentence discusses how the price of a regular or scheduled flight has gone up in the given year. A scheduled flight refers to flights run according to a set timetable.
Please confirm the departure time of the regular flight.
In this sentence, someone is being asked to confirm the departure time of a regular or scheduled flight. Again, a scheduled flight is one that operates according to a predefined schedule.