Start with the final address
Write down the airport terminal and the full accommodation address. For a scheduled shuttle or train, add the final walk or connection. For an accommodation transfer, verify that the quoted destination is your actual address.
Compare like-for-like totals
Multiply per-person fares by the travellers who need tickets, then include onward transport and any declared extras. Compare that total with the private-vehicle offer. Avoid comparing a one-person promotional fare with a whole-car price.
Check the timetable and flexibility
Scheduled services depart at defined times. Private services are subject to booking availability and agreed pickup arrangements. Check what happens after a flight delay, the included waiting period and the cancellation terms before payment.
Public transport has a place in the comparison
RER B serves CDG; metro line 14 serves Orly. Consult the official journey planner for fares, service changes and accessibility. For Beauvais, check the airport’s own transport information and the onward journey from its coach stop.
Questions before you travel
Which is cheapest?
It depends on the route, date, passengers and onward journey. Use current quotes and operator fares instead of assuming one mode always costs less.