According to sources, the Page Three legend became ‘abusive’ towards staff after being told she had to pay £30 for her carry-on luggage.
The Wizz Air flight was from London Luton to Vilnius, where Samantha, 49, was due to be performing.
But eyewitnesses claim she kicked off about not having priority boarding on the £150 flight.
She allegedly told staff: “I shouldn’t have to queue with these people.”
A spokesperson for Wizz Air told The Sun: “A passenger was offloaded due to abusive behaviour towards staff.
“The passenger seemed to be intoxicated. The effect can be worse in the air.”
But a rep for Samantha insisted she was not drunk and was simply explaining that she’d booked priority boarding.
The spokesman said: “She did not delay the flight. She paid £30. Then she was explaining she had priority boarding, yet economy was boarding before her.
“A girl working for Wizz apologised and she caught a later flight.”
Samantha managed to make it to her show on time and later tweeted: “Amazing sold out show last night. Thank you Lithuania. Lovely people.”
Earlier this year, Samantha was left heartbroken by the death of her long-term girlfriend Myra Stratton.
Myra sadly lost her two-year battle with cancer in August, aged 60.