Maximum sortiment av en portnyckel?

According to W.O.M.B.A.T., in order for portkeys to be arranged between countries, the consent of both Nations's Ministries of Magic may be required. (sourced from Wikia)

Som sådan kan du tydligt resa över långa avstånd. Bland de kända användningsområdena:

• Frankrike till Burrow (underförstått, det finns en chans att det inte var en direkt transport)

  Mr. Weasley had therefore gone to meet the Delacours on top of a nearby hill, where they were to arrive by Portkey (DH - Ch 6, "The Ghoul In Pajamas").

• Godrics Hollow till någonstans i Europa (var än Grindelwalds hem var)

  “It was poor little Ariana dying, I think, that did it,” says Bathilda. “It came as an awful shock. Gellert was there in the house when it happened, and he came back to my house all of a dither, told me he wanted to go home the next day. Terribly distressed, you know. So I arranged a Portkey and that was the last I saw of him (DH - Ch. 19, The Life and Lies of Albus Dumbledore.

Jag kunde inte hitta kanoninformation utöver det, i böckerna, Pottermore eller intervjuer (eller Wikia:).

Svaret från @DVK visar att Portkey Travel kan vara internationellt, men alla hans exempel återstår inom Europa. Följande citat ger oss ett exempel på vad som förmodligen är interkontinentala Portkey Travel:

"While there have been no proven referee slayings since [1357], there have been several incidences of broom-tampering over the centuries, the most dangerous being the transformation of the referee's broom into a Portkey, so that he or she is whisked away from the match halfway through and turns up months later in the Sahara Desert."
-- Kennilworthy Whisp, Quidditch Through the Ages

Det verkar som om Portkey resor till Sahara-öknen gjordes flera gånger från flera olika Quidditch-platser, förmodligen inte alla i Afrika .

(Detta är den längsta Portkey-turen som nämns i Wikia .)