Its important to note that the automobile windshield chip repair exterior trim and moldings that we can see on the outside of the glass are for looks only. The actual water seal comes from the "urethane" adhesive which is used to create the bond. Its in this urethane that the water leak is originating.

For that reason, many companies will happily waive the deductible if the existing windshield can be repaired. So you may be able to have that chip or crack fixed without paying anything at all.
If you do decide that fix auto glass is your best bet, you have a few choices. First of all, make sure you check to see if your insurance covers it. In a lot of instances it does. The problem is that many policies have a deductible that is higher than the cost of the replacement or repair job. If that is the case, you will have to pay for it yourself.
There are auto glass shops that offer mobile windshield repair to give you the best convenience. With such, you can have the auto glass technician to come to your place so you no longer have to bring your car to the shop.
A surface pit is a nick in the glass associated with normal wear and tear that does not penetrate to the plastic inner layer. This can be repaired if the damaged area has a diameter of not less than 1/8 inch.
As you prepare for winter travel, do not neglect your windshield. It is an essential safety feature of your vehicle and should be given the attention it requires. With a little care and maintenance, your windshield should remain in good condition all season.