Aer Lingus dropped a lot of awards from Washington DC. There are more than one business class seat available from Washington/Dulles almost every day of July and August. It could be a mistake by Aer Lingus or it could be the beginning of broader award availability being loaded.
Although Aer Lingus is part of the rewards program, they are not a part of One World.
This availability is only available during July and August and is currently available via most of Aer Lingus. The August schedule is from IAD-DUB. The Aer Lingus saver award flights are listed as 60K and $19 on the calendar. The majority of these days are on AA and United.
In August there are some flights with multi-seat availability. The Aer Lingus saver availability is shown on the Alaska calendar as 60K + $50.
The business cabin on these flights is the same price as the economy cabin. It happens with Alaska award pricing, but it is usually on AS metal.
Both A330 and A321 are flown by Aer Lingus. The A330 business cabin layout uses a combination of 1-2-1 and 2-2-1 layout, while the A321LR cabin is arranged in a straight line. The seats 3K and 5K are the most desirable on the plane.
H/t: STTP.