It's easy to do. If you need to edit details / delete a flight which is on the trip, you need to split it and then edit each flight. See more here how can you split trips.


iOS

Edit trip name

Swipe trip left and tap on the blue button.


Rename it


Edit flight details

Swipe flight left and tap on the blue button


Then you can edit flight details (as well as its name)


Android

Edit trip name

Tap and hold the trip, then select the Edit button.


Rename it


Edit flight details

Tap and hold the flight, then select the Edit button.


Then you can edit flight details (as well as its name)