The LP says that a lot of the morning flights in dry season get delayed
or cancelled because of fog. THIS IS TRUE !! What usually happens is
this: the first plane of 9.30 am gets delayed for about 1 to 2 hours.
THIS MEANS THAT ALSO THE 3rd FLIGHT GETS DELAYED, because this is the
same plane. The second flight of 11.30 am however is another one, and
by 11.30 am the fog has usually gone. So I strongly advise in dry
season to book the second flight which is usually on time, and to avoid
the first and the third flight. Secondly these flights tend to be
heavily booked by tour groups occupying 30 seats, so book ahead,
preferentially from home by internet, you've got nothing to loose with
making a reservation, since you pay once you're in Thailand.