Colds and Flu

Oh no. I've just learned that tomorrow at 4AM (!) we have to leave the house to fly on an airplane. While I don't mind flyig at all (makes me sleepy), the last time I flew, I got a cold that had me taking two rounds of antibiotics and lasted until about 1.5 weeks ago. I do NOT want to get another cold again. I hate having the cold, and I hate taking the antibiotics. I'm scared that the sick people in the plane are going to give me their germs. Yikes!