Travelling long haul pregnant

Me, my partner and his parents have booked a Christmas get away to Las Vegas!! (We live in the UK) We have been ttc for last six months so decided the time away would be good. However we don't want to put the trying for a baby on hold! Has anyone travelled Long haul pregnant? At most I'll be 27 weeks on the day we fly back.  Also in Vegas I won't be drinking or clubbing as we aren't like that anyway!