The new $ 25 option for same-day travel changes is only allowed on flights in the United States , Puerto Rico , the United States Virgin Islands and to the Caribbean , and it 's similar to options offered by Northwest and Delta .
Caribbean /location/location/contains Puerto Rico
DT JJ $ CD NN IN JJ NN NNS VBZ RB VBN IN NNS IN DT NNP NNPS , NNP NNP , DT NNP NNPS NNP NNPS CC TO DT NNP , CC PRP VBZ JJ TO NNS VBN IN NNP CC NNP .
Caribbean
LOCATION
Puerto Rico
LOCATION
/location/location/contains