Quick answer: A baby under 2 can travel on an adult's lap on KLM at a reduced infant fare. The bassinet rules are unusually precise and worth reading before you plan around one: the baby must be under 1 year old, under 10 kg and under 65 cm, and all three are assessed on the day of travel rather than at booking. Requests go through the contact centre and bassinets are on intercontinental flights only. A nine-month-old who is tall will frequently fail on length alone. Call a travel expert at Fond Travels on +1 (323) 800 6001.
Details below reflect what was published at the time of writing. Confirm them for your flights.
The three bassinet limits
- Under 1 year old on the day of travel. This is a stricter age ceiling than most airlines, which work on weight alone.
- Under 10 kg.
- Under 65 cm. This is the one that catches families — 65 cm is reached by many babies well before their first birthday.
- All three assessed on the travel date, not when you asked. A baby who qualified when you booked may not by the time you fly.
- Intercontinental flights only.
- Requests go through the contact centre, and nothing is confirmed until you board.
Measure your baby lying flat and weigh them before you plan around a bassinet. If they are near any of the three limits and the trip is months away, assume they will not qualify and plan accordingly — a purchased seat with an approved car seat is the realistic alternative.
The age and fare rules
- Under 2 on the travel date qualifies as a lap infant, assessed per segment.
- A second birthday mid-trip means a purchased seat for the return.
- A reduced infant fare applies on international journeys, typically a percentage of the adult fare plus taxes.
- It buys carriage, not a seat.
- Only one lap infant per adult.
Who operates your flight matters
This airline runs a transatlantic joint venture with two partners, and a ticket sold under one name is frequently flown by another.
- Infant rules, bassinet limits and allowances differ between the partners.
- Ask who operates each leg before you plan around a particular bassinet limit.
- On a two-leg trip the answer can differ between the long-haul sector and the European connection.
- The booking channel can matter too for infant arrangements on partner-operated flights.






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