My doctor has a 1 month travel ban too (he didn't tell me about it, but it was in my post op instructions I received at my pre-op appt). I had to attend a funeral out of state about 2 1/2 - 3 weeks after surgery and told my doctor. He let me go, but sent me with 2 shots of blood thinner for the two flight days and firm instructions to walk every hour to prevent blood clots. He said by that point, I was probably ok, but he wanted to have an abundance of precaution.