Jet2 has issued an "urgent customer notice" to every holidaymaker.
The airline warned travellers about a new scam targeting people who have flights booked with them.
Jet2 posted on its official Twitter account to urge people to be cautious after customers reported being contacted by a fake account.
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It said: "We have been made aware of several customers receiving messages advising to contact @jet2helps.com (and/or similar) to discuss bookings & queries.
"These accounts are NOT affiliated to us, so please DO NOT give personal information/data to them.
"The only official account for http://Jet2.com and Jet2holidays on Twitter is @jet2tweets which is a verified ‘blue tick’ account."
Jet2 was forced to issue a similar scam warning last month when customers reported they had been contacted by a fake account.
The company also revealed they had received a spike in bookings following the easing of travel restrictions earlier this month.
Steve Heapy, chief executive of Jet2.com and Jet2holidays, said bookings had spiked "by more than 250%".
He said Turkey is proving "exceptionally popular", adding: "Thanks to the certainty that yesterday's announcement has given customers, destinations right across the board are selling well, whether it's for late summer sun, winter or next summer.
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