Aware Traveler by Zuzanna Rogatty, via Behance
UI Design: Airwala App / flight travel checker
Filter - close up
UI Patterns For Mobile Apps: Search, Sort And Filter | Smashing UX Design - via
Travel App by uidynamics - Mobile app interface UI UX
HipMunk: We like to think of HipMunk as the best looking travel spreadsheet we've ever seen. Once you search it allows you to search by price, duration, departure time, arrival time, and agony (a combination of price, duration, and number of stops).