---
title: "What is a lie-flat seat | Business Class Glossary"
description: "A business class seat that turns into a fully flat bed, 180 degrees, so you can sleep lying down on a night flight."
canonical_url: https://buybusinessclass.com/glossary/lie-flat-seat
last_updated: 2026-11-04
---

# What is a lie-flat seat?

Source: https://buybusinessclass.com/glossary/lie-flat-seat

A business class seat that turns into a fully flat bed, 180 degrees, so you can sleep lying down on a night flight.

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## Lie-flat seat, explained

Most long-haul business class seats now become fully flat beds. The seat slides and reclines until it is level, and many airlines add a mattress pad, pillow and blanket.

The length of the bed and the width at the shoulders and feet vary by seat model. Some seats leave the feet in a narrow space under the seat ahead, called a footwell.

Older or shorter-haul business class seats may only recline part way or lie flat at an angle, which is less comfortable for sleeping.

### On a business class trip

On an overnight flight from the US to Europe, a lie-flat seat lets you sleep for a few hours and arrive able to start the day.

## Related terms

-   [Angled lie-flat seat](https://buybusinessclass.com/glossary/angled-lie-flat-seat)
    
    A seat that reclines to a long flat surface tilted at an angle, not level, so you tend to slide down it while sleeping.
    
-   [Direct aisle access](https://buybusinessclass.com/glossary/direct-aisle-access)
    
    A seat layout where every business class seat opens onto the aisle, so no one climbs over a neighbor.
    
-   [Business class suite](https://buybusinessclass.com/glossary/business-class-suite)
    
    A business class seat with a door or high walls that close it off from the aisle, for more privacy.
    
-   [Premium economy](https://buybusinessclass.com/glossary/premium-economy)
    
    A cabin between economy and business class: a wider seat with more legroom and recline, but no bed.
    
-   [Red-eye flight](https://buybusinessclass.com/glossary/red-eye-flight)
    
    A flight that leaves late in the evening and lands early the next morning, so most of it is flown at night.
    

Further reading: [Is business class worth it?](https://buybusinessclass.com/blog/is-business-class-worth-it). [Every term in the glossary](https://buybusinessclass.com/glossary).

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