Is it 'on route' or 'en route'?

En route is a phrase borrowed from French that means

55+ Introduction Email Subject Lines, opening english email

Basic route information including route numbers, and start and end

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55+ Introduction Email Subject Lines, opening english email

Enroute Simplifying the complexity of last mile logistics

BC Transit - Schedules and Maps

Main Maritime Shipping Routes and Chokepoints

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West Coast Express Schedules

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511 Nova Scotia

In Route or En Route – What's The Difference?