Is Flying Safe During Pregnancy While Having Intramural Fibroids?

Hi I am pregnant with my fifth child at age 39 soon. I have still fibroid intramural 3.3 cm. My unborn baby is healthy and I am wondering and hoping it is safe to fly in the plane to fly to Oregon from Canada this July that I will be around 32-33 weeks pregnant. i hope I am not considered high risk for my age and fibroid. This is will be my first time to fly with my pregnancy. I had never had misscarriage with my boys when I was young, no diabetes, no high blood pressure. I am still taking iron pills. Please advise. thanks