Southwest Airlines does not provide a direct "seats remaining" counter on its website, but you can use a "pro" workaround by utilizing the booking tool to check availability. To do this, start a new reservation for the flight you are interested in and select "8" or "9" passengers in the search criteria. If the system allows you to proceed to the checkout with that number of passengers, you know there are at least that many seats left. If it says "Only 3 seats left at this price," it refers to the specific fare bucket, not the whole plane. Another method in 2026 is to look at the Assigned Seating map (since Southwest moved away from open seating in late 2025). By proceeding through the booking process to the seat selection screen, you can see a real-time map of all "occupied" vs. "available" seats. Note that some seats are held for "A-List" members or "Basic" fare assignments at check-in, so a map with 20 empty seats might only have 10 truly "bookable" ones. For the most accurate view, checking the flight's status in the Southwest App 24 hours before departure will show if it is "sold out" or still accepting "Same-Day Standby."