Aer Lingus has released a promo code that will take $300 off round trip Business Class transatlantic flights from select U.S. markets to Ireland, the UK, and Europe. This offer must be booked by November 4 for travel November 1 – 30, 2019. It is valid from Hartford (BDL) Minneapolis-St Paul (MSP) Chicago (ORD) Newark (EWR) or Philadelphia (PHL) to Dublin, the UK, and Europe. It is also valid from New York (JFK) or Boston (BOS) to Shannon, Ireland. You can book this offer here.
Make sure you enter promo code BUSINESSDEAL in the promo code box on the first booking page!