###User: Quelle est la compagnie aérienne la plus utilisée pour les vols de paris (par) à porto (opo) ?  ###Assistant: Les compagnies aériennes opérant des vols de paris (par) à porto (opo) incluent : [air france](https://fr.trip.com/flights/airline-af/air-france/), [tap portugal](https://fr.trip.com/flights/airline-tp/tap-portugal/), [vueling airlines](https://fr.trip.com/flights/airline-vy/vueling-airlines/), [transavia france](https://fr.trip.com/flights/airline-to/transavia-france/), [easyjet](https://fr.trip.com/flights/airline-u2/easy-jet/), [aigle azur](https://fr.trip.com/flights/airline-zi/aigle-azur/), [jet airways](https://fr.trip.com/flights/airline-9w/jet-airways/), [ryanair](https://fr.trip.com/flights/airline-fr/ryanair/), [iberia](https://fr.trip.com/flights/airline-ib/iberia/), [atlasglobal](https://fr.trip.com/flights/airline-kk/atlasjet/), [klm royal dutch airlines](https://fr.trip.com/flights/airline-kl/klm-royal-dutch-airlines/) et [sata international](https://fr.trip.com/flights/airline-s4/sata-international/).