UV light does not just create repairable dimers in DNA bases, it can and does rip DNA apart. Enough exposure would cause more than enough irreparable damage to kill the cell and 99% of the cell being destroyed is certainly not salvageable.
The Delta flight is cheaper. But check a bag at a cost of $25 for the first checked bag each way on Delta, and your total fare climbs to $256 -- more than the cost of the Southwest flight, which includes free first and second checked bags. Add a second checked bag for $35 each way on the Delta flight, and you'll pay a whopping $326.
The Delta Airlines (DL) baggage policy for regular basic fares include the following: 1  Carry-on baggage. 2  1 personal item - Fee free. 3  1 carry-on item - Fee free.  Checked baggage / Hold luggage - Applicable fees per bag increase with number 1  checked. Overweight and Oversize bags - Applicable fees per bag depending on weight and size categories.