Below are the ferry & plane timetables to & from Kastellorizo. Click the blue link to be taken to its timetable page.
The ferry schedules are as follows:
Dodekanisos Pride and Dodekanisos Express catamarans (Monday 2pm, Wednesday 8:30am & Thursday 7:30am) depart Rhodes direct for Kastellorizo (2.5 hour journey).
Blue Star Chios ferry (Monday 7:30am & Friday 8:30am) departs Rhodes direct for Kastellorizo (3 hour journey) and immediately turns around and departs Kastellorizo back to Rhodes.
SAOS Stavros ferry as of 20 June (Tuesday 6:30pm, Wednesday 5:30pm & Sunday 8am) departs Rhodes direct for Kastellorizo (5 hour journey). Click for more details: https://www.saos.gr/wp-content/uploads/2022/05/e8d866f5374d47fd959467d4aee97074_.pdf
Aegean Airlines (every day except Thursday) AO096 departs Rhodes at 11:05am and arrives Kastellorizo 11:45am. The plane immediately turns around and Flight AO097 departs Kastellorizo at 12:05pm and arrives Rhodes at 12:45pm.