Southwest ends open seating, rolling out assigned seats and paid upgrades

A signature Southwest tradition ends

For decades, Southwest Airlines stood out by letting customers pick any open seat once they boarded. That system turned check-in into a 24-hour countdown: travelers who tapped “check in” the moment the window opened often landed early boarding positions and better odds at a window or aisle. By Monday, many passengers were taking what amounted to their final flights under the familiar “find-your-own-seat” approach as the carrier prepared for a major change.

Starting Tuesday, Southwest begins operating with assigned seats. The shift is one of the most visible changes in the airline’s modern history, designed to make the boarding experience more predictable for customers while giving the company new ways to price different seating options.

How boarding will work now

The airline is replacing its old lineup system—built around letter groups—with an eight-group boarding structure. Instead of passengers clustering around numbered columns and trying to determine when their group should move, travelers will board by group and follow a more typical lane-based flow at the gate. Southwest said it will convert gate areas in phases, a process expected to take about two months, and some legacy equipment may remain temporarily while signage is updated.

Under the new model, boarding passes will show both a seat assignment and a boarding group. Southwest also says that reservations for nine or fewer people—including many families—will be placed into the same boarding group to reduce the chances that parties get split across widely separated boarding positions.

Paid seat choices and fare tiers

Southwest is selling tickets tied to different seating choices. Some seats will be assigned at check-in, while travelers can pay for preferred placement closer to the front or for extra-legroom seats selected earlier in the booking process. For certain flights, customers will also be able to purchase priority boarding starting 24 hours before departure.

The airline says boarding group placement will be influenced by factors such as seat location, fare class, loyalty-tier status, and benefits linked to the company’s credit card rewards. Passengers who buy extra-legroom seats are expected to be placed into earlier groups, while basic fares will tend to board later.

A revised policy for passengers who need extra space

Alongside assigned seating, Southwest is changing how it handles customers who need additional room. Under the updated rule effective Tuesday, travelers who cannot fit within a single seat’s armrests will be required to purchase an additional seat in advance. Refunds may be possible, but the company says they are no longer guaranteed and depend on availability and fare conditions.

Why Southwest is making the move

The open-seating system originally helped Southwest turn planes faster and run a tighter schedule—one reason the airline built a reputation for efficient operations. Over time, however, the process became less straightforward as the airline added options that let customers pay more to improve their boarding position, and many travelers increasingly preferred to know their seat before arriving at the airport.

Southwest has also been under investor pressure to improve profitability, and leadership has argued that offering a more conventional seating approach could attract customer segments that previously avoided the airline because of open seating. The change arrives amid a broader set of shifts as Southwest refashions long-standing practices to compete in a market where major carriers increasingly monetize seat location, boarding order, and other travel perks.