However, since the country is only accessible via the Schengen countries Spain or France, entrance is not possible without entering the Schengen area first and the Schengen visa rules can, therefore, be regarded to apply de facto.
Thus, although no visa requirements exist, apply the relevant regulations of France or Spain, whichever must be transited to reach Andorra. Because Andorra is not part of the Schengen area, a multiple entry visa is required to reenter the Schengen area when leaving Andorra.
There are no airports for fixed-wing aircraft within Andorra's borders but there are, however, heliports in La Massana (Camí Heliport), Arinsal and Escaldes-Engordany with commercial helicopter services.
Andorra tourist visa is not required for citizens of Gibraltar for a stay up to 90 days.
All travelers will need a passport valid for at least 90 days following your departure date from Andorra. However, we strongly recommend traveling with 6 months validity on your passport at all times. Citizens of United Kingdom can refer to www.ips.gov.uk for forms and instructions for new passport applications and British passport renewals.
Most destinations, including Andorra, require that you have adequate un-used pages in your passport, allowing for any necessary stamps upon arrival and departure. We recommend that you have at least two free pages in Visas section of your passport before any international travel. British citizens can get extra passport pages added to their passports at www.ips.gov.uk.
Check with your airline in case you have connecting flights overseas as part of your journey to Andorra. It may be the case that countries you pass through en route to your destination may require a separate transit visa. Please refer to visa requirements of the specific country.