Como dizer passagem de ônibus/avião/ida & volta em Inglês?

PASSAGEM DE ÔNIBUS: BUS FARE/TICKET

Ex: Bus fare in my state is really expensive. 

PASSAGEM DE AVIÃO: PLANE TICKET

Ex: Why is January the best month to buy a plane ticket?

PASSAGEM DE IDA: ONE-WAY TICKET

Ex: would you go to Mars if you had a one-way ticket?

PASSAGEM DE VOLTA: RETURN  TRIPTICKET

Ex: They're offering economy class return trip tickets to London.

PASSAGEM DE IDA E VOLTA: ROUND TRIP TICKET

Ex: The question is, will the round-trip ticket be precisely double the one-way fare?