Airlines rarely disclose the exact number of remaining seats to the general public to protect their competitive pricing algorithms, but you can get a very accurate estimate using a few specialized tools. The most popular method for "power travelers" is to use ExpertFlyer, a subscription service that allows you to see the "fare buckets" for a specific flight. For example, if you see "J9 C9 D9," it means there are at least 9 seats available in the top business class categories. Another trick is to use the airline’s own website by attempting a "dummy booking" for a large group. If you try to book 9 seats and the system allows it, you know there are at least that many left. You can also view the seat map during the booking process, though this can be misleading as many passengers may have booked a ticket but not yet selected a seat, or the airline may be holding seats for elite upgrades. For a more casual check, tools like Google Flights will sometimes flag "only 2 seats left at this price," which indicates that the lower-cost business class tiers are nearly exhausted, even if the cabin itself still has several physical seats available for a higher fare.