We use a product called, "Earplanes", they are ear plugs used by pilots, etc., and have worked like a charm on my ears, and on my DD's, which we have troubles with. You can find them at Target, etc., and are about $4.50 per set. Each set can be used for two flights only. They may seem expensive, but they have been amazing. As mentioned before, Saline is a good idea too.