KLM asks for no fit-to-fly certificate and nothing is sent in advance, yet its page still draws a line: it advises you to stop flying once you are 36 weeks pregnant, so your last KLM flight falls in week 35. Below: the day count, the twins gap, and what a cautious traveller carries.
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KLM requires no fit-to-fly letter, and there is no form to send in. KLM's rule is advisory: stop flying when you reach 36 weeks, so the last KLM flight you should take is in week 35, at 35 weeks + 6 days or earlier. For twins or a pregnancy with past complications, KLM sets no number and tells you to consult your physician.
KLM's wording is that you should stop flying when you are 36 weeks pregnant. Counted by the day, 36 weeks + 0 days is the first day the advice applies, so your last day on a KLM aircraft is 35 weeks + 6 days. In short, KLM's last week is week 35.
Apply it to each flight. Leave at 34 weeks + 2 days, come back eleven days later, and you land home at 35 weeks + 6 days, inside the advice; a day later you would not be.
| Letter or certificate required from | Never; KLM advises medical clearance from your physician, kept for yourself |
| Last week you can fly, single | Week 35 (35 weeks + 6 days); KLM advises stopping at 36 weeks |
| Last week, twins or more | Not published; KLM says consult your physician before departure |
| Letter must be issued within | Not applicable, as nothing is submitted |
| Own form | None |
| Who can sign | Any physician, for your own clearance; KLM names no particular professional |
| Source checked | klm.com, Flying while pregnant, 24 September 2026 |
No. KLM's page says two things that are easy to run together: it advises you to get medical clearance from your physician before you board, and it says you do not have to submit this in advance. The clearance is for you, not the airline; no form or upload is described.
Other carriers on a KLM ticket may differ: if a codeshare or connecting leg is operated by another airline, that airline's rule applies to its flight. KLM asks something simpler: tell its staff you are pregnant and give your due date.
KLM says less than most airlines here: no twins week limit, no list of complications, just an instruction to consult your physician before departure if you expect more than one baby or have had complications.
Do not read the single figure across. Carriers that publish a twins limit set it earlier (32 weeks at British Airways, Lufthansa and easyJet, 31 at Iberia and Vueling), and the RCOG advises against flying beyond 32 weeks with an uncomplicated twin pregnancy. End the consultation with a dated letter (see the pregnancy fit-to-fly guide) confirming fitness to fly on your dates.
KLM will not ask, but three documents help if a border officer, connecting airline or insurer does.
A doctor on Mobi Doctor provides the first: wherever you are in the EU, a video consultation begins usually within 15 minutes; hours are daily 7am–11pm CET. The signed pregnancy fit-to-fly certificate, issued where clinically appropriate, is emailed after the call.
KLM advises against flying during the first week following delivery, the same seven days Air France and Iberia name, so a birth abroad means at least a week before the flight home, and longer if your doctor advises it. The newborn's own booking is a separate question for the airline. If you delivered abroad and need to get home, a doctor on Mobi Doctor can review how you are recovering and, where clinically appropriate, confirm in writing that you are fit for the flight.
Within Air France–KLM the numbers do not line up. Air France asks passengers to avoid travel from week 37, with no clearance required and, like KLM, no twins figure. Transavia, its low-cost sister, takes an uncomplicated pregnancy through week 36 but stops twins and complicated pregnancies after week 34. easyJet shares KLM's week-35 boundary and adds a twins limit of 32 weeks. On a mixed itinerary the strictest carrier sets your window; all 30 are on the airline pregnancy rules hub.
No. KLM requires no certificate and has nothing to submit. It advises medical clearance from your physician before boarding, for your own benefit, so carrying the resulting letter is sensible past week 28.
KLM advises you to stop flying at 36 weeks. Counted by the day, your final KLM flying day is 35 weeks + 6 days, so plan the return to land before then.
KLM advises against it: 36 weeks or more is where it tells you to stop. That is advice rather than a printed refusal, but it is the airline's stated position.
No. KLM publishes no limit for a multiple pregnancy and asks you to consult your physician. Do not assume week 35 applies; airlines that publish a twins limit set it at 31 or 32 weeks.
KLM recommends it: let staff know you are pregnant and give your expected due date. There is no form to fill in; just mention it at check-in or to the cabin crew.
KLM advises against flying in the first week after delivery. Wait at least seven days, take your doctor's advice on whether you are ready, and ask KLM separately about the newborn's booking.
General information, not medical advice — always confirm with your airline before you travel.
