Airline "snobs" are snubbing certain carriers to avoid particular types of people, according to a survey.
As many as 21% of air passengers said they choose their flight bearing in mind the sort of people normally using a particular airline, the poll by travel agent sunshine.co.uk found.
Also, 9% said they would opt for flights based on how attractive they thought cabin crew would be, while 65% said they would behave differently if they were travelling with an "upmarket" airline.
A total of 2,265 UK adults took part in the survey. All had been on a holiday abroad in the past 12 months and had gone by air.
The cost of a flight was the main reason for choosing a particular airline, followed by flight times and luggage allowance.
A total of 33% said they would treat cabin crew and airline staff with more respect if travelling with an upmarket airline, while 46% said they would be more likely to make a complaint if they were flying with a budget carrier.
Rude staff topped the list of reasons for not travelling with an airline again, followed by delays, hidden costs and disorderly check-in processes.
Also, 25% said "bad experiences with other passengers" would put them off booking with a specific airline again.
Sunshine.co.uk managing director Chris Clarkson said: "While choosing a flight based on the lowest price tickets wasn't too surprising, it was a revelation to see that a fair few would disregard an airline just to avoid a 'certain type' of people."