LOT Polish Airlines asks nothing of an uncomplicated single pregnancy up to 32 weeks. Beyond that you need a MEDIF completed by your attending physician no more than 14 days before departure (10 for US flights) and submitted at least 72 hours ahead; twins or complications need one at any stage. LOT publishes no final week.
Or plan by dates. Enter your due date and flight dates: the planner works out how pregnant you will be on each flight, whether that flight is allowed, whether a letter is needed for each leg, and the dates a letter must be signed between so it is still valid on the way home.
Copy the flight lines from the airline’s confirmation email (flight number, date, times) and paste them here. It is read in your browser; nothing is sent anywhere.
Enter your flight number and the dates above (or a route), and the planner fills in the airline — the operating carrier on a codeshare — and the flight time from the published schedule.
Or by route: to on the outbound date.
Choose a situation to see whether you need documentation.
Up to 32 weeks, with one baby and no complications, you fly LOT without any medical form; LOT just recommends carrying your maternity record. Beyond 32 weeks, or at any stage with twins or complications, your attending physician completes a MEDIF no more than 14 days before departure and you submit it to LOT at least 72 hours ahead. No last week is published: the MEDIF review decides.
Most airlines that demand a letter want it from week 28 or 29; LOT and Finnair are the only two in our comparison whose requirement starts at 32, and Finnair's applies only on flights over 6 hours. LOT's page draws the line at 32 weeks: up to 32 weeks no form, beyond 32 weeks the MEDIF.
It does not say which side of the line week 32 itself sits on, so treat any flight on or after 32 weeks + 0 days as needing the form.
The MEDIF must be completed by your attending physician no more than 14 days before departure, so the earliest signing date is day 14. It must reach LOT at least 72 hours before departure, so the latest submission is day 3. That leaves an 11-day window to see the doctor and send the form; for US flights the completion window shrinks to 10 days.
Submit through LOT's passenger-support form. If you booked through a travel agency, LOT asks you to send the MEDIF to the ticket issuer, who forwards it.
Only if the return takes place within 14 days of the document's issue date; then LOT accepts the same certificate for the journey home. Stay longer and you need a new certificate for the return, arranged abroad or over video inside 14 days of the homeward flight and 72 hours before it. For US flights LOT's page says a new certificate is not required for the return.
Condor's form stays valid for the return whenever it is, while airBaltic wants its note dated within 14 days of the flight.
LOT publishes no final week. Every pregnancy past 32 weeks, and every multiple or complicated pregnancy, goes through the MEDIF review instead. That is not an invitation to fly at 38 weeks: the UK CAA's page for health professionals notes that most airlines do not allow travel after 36 weeks (32 for a multiple pregnancy), and a MEDIF reviewer assesses exactly that risk.
Twins at 20 weeks need the form just as a single pregnancy at 34 does. Ask LOT before booking anything late; our airline pregnancy rules comparison lists carriers that publish a limit.
| Letter or certificate required from | Beyond 32 weeks (MEDIF); at any stage for twins or complications |
| Last week you can fly, single | Not published; the MEDIF review decides |
| Last week, twins or more | Not published; MEDIF at any stage |
| Letter must be issued within | 14 days before departure (10 for US flights); submitted 72 hours ahead |
| Own form | MEDIF (Medical Information Form) |
| Who can sign | Your attending physician |
| Source checked | LOT pregnant women page, 24 September 2026 |
SAS also relies on a MEDIF, but frames its rule by due date.
Get the MEDIF form from LOT. LOT wants the medical part from your attending physician; if your own obstetrician cannot fit you in, a doctor on Mobi Doctor can go through your maternity record with you over video, usually within 15 minutes, daily 7am–11pm CET, and complete the physician's section where clinically appropriate.
The signed form is emailed to you after the consultation; you then send it to LOT at least 72 hours before departure. Cost: €54 + €10 for the certificate. Our fit-to-fly certificate page explains how a MEDIF differs from a plain letter; the flying while pregnant guide covers counting your weeks.
Not a letter: a MEDIF. Up to 32 weeks an uncomplicated single pregnancy needs nothing. Beyond 32 weeks, or at any stage with twins or complications, your attending physician completes LOT's MEDIF within 14 days of departure and you submit it 72 hours ahead.
LOT publishes no maximum week. Beyond 32 weeks every flight depends on a MEDIF that LOT reviews, so how late you can fly is decided case by case; most European airlines stop at 36 weeks, so do not assume LOT goes later.
Only with a MEDIF completed within 14 days of departure, submitted at least 72 hours ahead and accepted by LOT. No week is ruled out on LOT's page, but acceptance is LOT's decision.
Only with a MEDIF: LOT wants the form for a multiple pregnancy regardless of stage, so even at 20 weeks the physician completes it within 14 days of departure and you submit it 72 hours ahead.
Completed no more than 14 days before departure (10 for US flights) and with LOT at least 72 hours before you fly. For the return, the same form works only if you fly home within 14 days of its issue date.
You need a new certificate for the return, completed within 14 days of the homeward flight and submitted 72 hours before it. LOT's page makes an exception for US flights, where a new certificate is not required for the return.
General information, not medical advice — always confirm with your airline before you travel.
