What does both itineraries look like?
the short trips are flying to BUD on Apr. 16 / 17 going to Kerestir, Ihel, Kaliv, Liska (option: a tour in Budapest), & returning from BUD on Apr. 18 / 19.
the longer trip is flying to PRG on Apr. 15
Apr. 16 - tour in Prague, all the shuls, museum & cemeteries, sleeping in Prague.
Apr. 17 - Bal shem tov`s MIKVEH in Ranshburg, Tachov & Nikelshburg (both within 3 days of yurtzeit), sleeping in Bratislava.
Apr. 18 - Preshburg - the chasam sofer, Kerestir, Ihel, Kaliv, Liska.
Apr. 19 - returning flight from BUD.
the cheap prices are only for reservations confirmed today by 5:00 pm Eastern time.