travel, journey and trip

Travel means ‘travelling in general’. It is uncountable.

    My interests are music and travel.
    A journey is one ‘piece’ of travelling.
    A trip is a journey together with the activity which is the reason for the journey.
    I’m going on a business trip next week.
    (= I’m going on a journey and I’m going to do some business.)

We do not usually use trip for journeys which take a very long time.