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Why airplane food tastes bland while high in the air
25th July, 2026 12:41 PM
A meal served thousands of feet in the air rarely tastes as rich as it does on the ground. Passengers taking off from airports often find that well-seasoned beef, chicken, or rice dishes taste surprisingly flat once airborne.
Airline caterers usually take the blame for the bland food, but human biology and cabin air are actually the real culprits.
At cruising altitude, cabin pressure drops to levels similar to standing on a high mountain peak. The air inside the cabin is also extremely dry, with humidity levels falling below 12 per cent.
This dry environment dries out the nasal passages, making it difficult for smell receptors to work properly. Since smell accounts for a large portion of overall flavour perception, food immediately loses much of its appeal.
How altitude weakens the sense of taste
Sensory tests show that low cabin pressure and dry air specifically affect sweetness and saltiness. Sensitivity to salt and sugar can drop by up to 30 per cent during a flight, while sour and spicy flavours remain unchanged.
As a result, a balanced meal prepared on the ground tastes under-seasoned once airborne.
Research published in the International Journal of Gastronomy and Food Science explains the main environmental drivers behind this shift.
In his study, Charles Spence noted that “three of the key environmental factors that have been shown to play havoc with the passenger’s ability to taste at altitude are the reduced cabin air pressure, the lack of humidity, and the loud background noise”.
Engine noise and craving savoury flavours
The steady hum of jet engines also plays a role in how food tastes. Background noise above 85 decibels dulls sweet tastes even further, but it enhances savoury notes known as umami.
This shift explains why many air travellers order tomato juice or heavily spiced soups during flights, even if they rarely consume them on the ground.
Staying hydrated during flights and drinking extra water helps keep nasal passages moist, allowing travellers to enjoy their inflight meals much better.
