Use an indoor dryer to dry your clothes. Lastly, drive with your windows closed using an air conditioner if the air is warm. Pollen through open windows can cause significant symptoms. I travel a great deal for my work and never seem to know what will set off my nasal allergies in each city. Spending a great deal of time on planes doesn't help.
Airplanes are one of the worst places for people who have allergies.
There have been studies that have shown that airplanes have the highest levels of dust mite and cat dander of any other environment. This is due to the fact that many people are using the seats and have cat dander and dust mites on their clothes and body. Therefore, I would recommend that you use an antihistamine and topical nasal steroid spray on a regular basis when you are traveling. If possible, especially if your company is paying for it, try to upgrade to first class where the seats are leather and trap less dust and pollen, and also where you will have more room and won't be affected as much by the people sitting next to you. Doctor, I have pretty much outgrown my hay fever, but now have picked up more severe allergies such as latex and adhesive tape.