Anyone know the name of this film/ tv show?

[Hertfordshire10012]

Two men are sat on a sofa in a plane. A man leaves the room and goes into another room and makes out with a woman, the door is shut but not fully and one of the men on the sofa sees them

ChatGPT: Based on your description, the scene you're recalling might be from the film Just a Kiss (2002). This dark comedy includes a sequence where two characters engage in a romantic encounter on an airplane, observed by others, fitting the scenario you described. Wikipedia
If this doesn't seem to match, could you provide any additional details? Information such as the approximate year you saw the film, the actors involved, or any specific lines or events can help narrow down the possibilities.