Flyers warn air travel is becoming unbearable as passenger seats keep shrinking

More and more travelers are taking to social media to share the uncomfortable experiences they've had sitting in cramped airplane seats - prompting renewed debate over airline seating policies and passenger etiquette.

Across multiple platforms, passengers have posted videos and detailed accounts about situations in which they were literally pressed against windows or armrests on fully booked flights.

Some users described feeling trapped, panicked or even short of breath during flights when neighboring passengers leaned into their space or occupied more than the person's assigned seat area.

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In one widely discussed Reddit post, a passenger said he or she was crushed against the side of the plane during a cross-country flight after the middle-seat passenger fell asleep shortly after takeoff. 

The user said attempts to push back were unsuccessful - and the person eventually asked for help from flight attendants.

The post prompted hundreds of responses from users who said they, too, had encountered situations like that.

One user wrote, "United has a policy for this - [passengers] must be able to sit in their own seat with the armrests fully down, otherwise they need a second seat. If there aren't extra seats, they need to change to a flight that has some."

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Many people urged other passengers to raise seating concerns during the boarding process rather than after a flight departs - while others said the airlines often fail to enforce their own policies.

On TikTok, users have posted videos describing feeling squeezed into their seats during flights and debating who bears responsibility when space becomes an issue.

In one video, a man described sitting next to a larger passenger and suggested the person may have needed two seats. 

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Some commenters said criticism should not be directed at larger passengers. 

"Instead of shaming them, you [should] keep your opinion to yourself," one user wrote.

Others defended those speaking out about the issue. 

"How is he being mean?" one user said, referencing a poster who complained about his situation. "He paid for a seat and was crushed into two-thirds of it."

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"Put the armrest down," several users wrote.

Florida-based etiquette expert Jacqueline Whitmore, a former flight attendant, said the issue reflects growing challenges as airplane seating continues to shrink.

"The seats on airplanes seem to be getting smaller for everyone, which makes awareness essential," Whitmore told Fox News Digital.

"No one should be pressed, leaned on or crowded out of their seat."

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"When space becomes a problem and boundaries are crossed, the solution isn't to suffer in silence," she also said.

"It's best to address the situation calmly, thoughtfully and appropriately."

The websites of United Airlines and American Airlines note that passengers who need more space can book an additional seat or upgrade to a wider premium cabin - with options to rebook on another flight if extra seating is unavailable.

The airlines also state that passengers must be able to sit within their own seats, with armrests fully lowered.

They recommend addressing seating needs in advance, as same-day accommodations may be limited on full flights.

Fox News Digital reached out to United Airlines and American Airlines for further comment.