Much of Wales' bus and train services are being cut today to respond to a drop in users say operators.
The Jones family from Penarth, used the airline several times a year to fly from Cardiff to visit family in Dublin.
The carrier narrowly avoided administration in January but has continued to lose money.
The railway line between Cardiff and Bridgend has been closed and tracks at Llanharan and Skewen have been flooded after heavy rainfall.
The improvements will include new lifts, accessible toilets and customer information screens.
The accident involved five vehicles
Transport for Wales faces a list of repairs from the damage caused by Storms Ciarra and Dennis.
Investment will also be made to expand CrossCountry's seat reservation service to allow passengers to reserve a seat on most services.
Some lines reopen but passengers are urged to check for delays or cancellations as poor weather set to continue into Wednesday and Thursday
An amber weather warning is in place.