Thanks to airplanes, we can travel around the world in two or three days.
Literal
Airplane [thanks to-のおかげで], we [topic-は] 2-3 days [in-で] world-trip [subject-が] is-possible.
世界一周 (せかいいっしゅう, 'trip around the world') is a vivid compound. ２、３日 ('2 or 3 days') uses the Japanese convention of a comma between approximate numbers to express a range.