Why do certain carriers disappear from the Priceline matrix

[NTorch]

I've been trying to price flights for a flight to Israel in August and I noticed that some days certain carriers just dont show up on the list of flights. Its not that  certain carriers are not offering flights for certain dates, but for example today (and one day last week) American Airlines was not in the list of potential flights regardless of which day I was looking to book for.

Is this something that others have observed and do you know why?

[aygart]

I've been trying to price flights for a flight to Israel in August and I noticed that some days certain carriers just dont show up on the list of flights. Its not that  certain carriers are not offering flights for certain dates, but for example today (and one day last week) American Airlines was not in the list of potential flights regardless of which day I was looking to book for.

Is this something that others have observed and do you know why?

Maybe they are booked?

[NTorch]

Maybe they are booked?

No, because if I go on the AA site there are flights, they just dont show up on Priceline.

Am wondering if this happens for other airlines too.