I am Brazilian and my fiancé is Filipino. We are planning to go to Brazil from Singapore, and the few cheap flights we found have 3 different stops in 3 different European countries: London, Romania, and Portugal. We are only going to wait in these airports for the next flight. Does it require us a transit visa? We won't dispatch any luggage, just bring hand bags with us.
The flight itinerary is SIN > LGW > OPT > LIS > POA. This is the image: