PHP/MYSQL - adding multiple records at once

Hi All,
I have an issue I am trying to get around.
I have a website for plane spotters, some have asked if they can have the following -

multiple input of spots for a spotting occasion.

e.g. they visit Manchester Airport, on 2015-02-23 and spot 18 aircraft. they want to be able to add into the DB all of the records on one screen so that they can see what they have already entered. eg.

G-TUIA B787 Dreamliner Thomson
G-OOBM A330 Monarch
G-EZUM A320 easyJet

they wish to input them into the screen and once completed they can click insert.

I can do this for one spotting but how to do it for multiple?