What's the best word for one ride on a train?

According to its schedule, a train leaves A and arrives at B. It does it everyday just like, well, trains should. We've all been there.

Now - what's the most natural word for this scheduled journey? Is it a "route from A to B"? "Route" seems to refer to a line in space... Or should we say "today's travel/journey has been interrupted by a bomb threat"? But aren't they too general? Service, maybe?

The context is as follows: "They ensure that the trains are both loaded and unloaded during/within one ______________ as often as possible."


Solution 1:

RUN(S)

How about, "the train [makes] two [runs] from London Paddington to Penzance and back - one in the morning, one in the afternoon".

Run noun plural noun: runs:

  1. a journey accomplished or route taken by a vehicle, aircraft, or boat, especially on a regular basis. "the New York-Washington run"

Synonyms: route, journey

See Google.com, “run” Link

Actual example,

The Paris Metro runs from roughly 05:30 till 00:40 (5:30am – 12:40am) Sunday thru Thursday and 05:30 – 01:40 on Fridays, Saturdays and on days before a holiday. Frequency between most trains range from 2 minutes during rush hour up to 8-10 minutes during off hours, holidays, and sundays.

See, Paris by Train Link

Solution 2:

Train journey is a common word used to refer to a train service from one place to another:

  • A journey is the process of travelling from one place to another by land, air, or sea.
    • There is a direct train from London Paddington to Penzance. The journey takes around 5 hours. This service will save thousands of long-distance lorry journeys on Britain's roads.

Ngram: train journey, route, travel, passage.