Delta Seat Availability on Flightstats
 

If I see the seat availability per below on Flightstats, does it mean the flight have space for me to do a SDC? Why does coach show n/a?

Thank you!

Available Seats:
First: 4 (at least)
F/4 P/3 A/2
Coach: n/a
Y/6 B/5 M/4 H/4 Q/4 K/4 L/4 U/3 T/3 E/3

Expertflyer is more reliable though experience says not perfect.

Yes. If Y is greater than 0, you can SDC.

Does FlightStats show 4 as the max amount (some airlines are like that on ExpertFlyer) or does it show the actual amount of seats available. So if there are 50 seats, would it show 50?

The fare bucket counters only go up to 9. If you see Y/9, it means they are willing to sell at least 9 coach seats. The bucket counters can't tell you how are many seats are actually available which also may not match the number of physical seats when an airline oversells a flight.

Thanks! There are some airlines that only show 4 as the max though. I know what EF does, but is Flight Stats only max to 9? Ive seen some flights showing 18 or 19 on some flights. So Im confused.

It varies by airline but I have never seen a discrepancy between EF and Flightstats. And I have never seen more than 9 on any airline.

Just pulled this from Flightstats.com for today. First flights shows 17 seats available, second only 4. That's why I am confused. When you click further, it says Y9, but what does the 17 mean under the Seats column?

DL 6191*
11:10 AM GSO
12:46 PM LGA
CR7
17

DL 2247
2:00 PM LGA
4:35 PM ATL
738
4

What you're seeing would appear to be explained as (at least) 9 Y added to 8 F = 17.
This gets tricky, when, as sometimes happens, a flight shows some business and some F inventory. The field that you see that shows "17" always adds the coach, the business and the F, even though F and business are not additive, as they're largely the same seats.