Flying ✈️✈️

Just wanted to know is it safe to fly during pregnancy. Me and my boyfriend want to take a trip to Florida for his birthday. We went to California for mine. I'll be about 18 weeks around then. It's the end of August. I've never been on a plane either so that's another thing I feel I should add in. Has anyone flown during pregnancy? I plan to ask my ob but I just wanted to here opinions