Un avion is an airplane in English.
The Spanish word, avion, is Bird in English.
you say avion
un avion
Boletos de avion baratos is Spanish. The English translation of Boletos de avion baratos is cheap plane tickets. Online travel agents us this to attract the Spanish speaking travelers.
un avion
"llevame al avion"
"avion est cassé"
plane un avion
The phrase 'boletos de avion' is a Spanish phrase; it can be translated into English as 'Airplane Tickets', according to Google Translate and the Translate website.
le voyage en avion
un avion, un aéroplane