I have no issues with flying and have made several flights already during my pregnancy, my question is more concerning the admin side of things. I am due to fly to the UK in a few weeks and for the outbound flight I will be 26w3d - no problem with airline etc etc... The return leg (10 days later) I will be 27w6d. I have got the following from the airline website... Expectant mothers can be accepted for travel up to 27 weeks (inclusive) without a medical certificate. When travelling between 28 - 35 (inclusive) weeks a medical certificate issued by a doctor or midwife confirming the number of weeks of pregnancy is required confirming that the passenger is fit to fly. This document needs to be issued within the 5 days prior to departure. Pregnant passengers cannot be accepted for travel on or after week 36, and therefore all return flights must be completed no later than week 36. So my questions are.... At 27w6d do I need a letter? perhaps not by my reading. If asked how pregnant I am and I reply 27 weeks will that cause me issues if I don't have a letter. Is there any reason why I shouldn't say 25 or 26 weeks, are they really going to check up. A few additional points: Currently my bump is small and I can easily just look a bit podgy. The flight is less than 90min long. I have had no problems with my pregnancy so far. My doctor is here in Switzerland and will give me notes but they will be in German and useless to most UK medical professionals. I don't have a UK doctor and getting an appointment could be tricky.