Is there any US-based airline that has lie-flat seats on 737s?

Is there any US-based airline that has lie-flat seats on A321 other than on NYC-SFO/LAX flights (with special configurations limited to those routes)?

With that NYC-SFO/LAX exception, lie-flat seats on single-aisle aircraft tend to be only trans-oceanic flights such as 757s that go to Europe AFAIK. But AS flies no such flights.

Other than that, lie-flat seats are mostly on two-aisle aircraft, and I haven't heard of AS having any plans for those.