Aer Lingus Europe-US business class return from £700

Thanks to @Ivan for flagging, and this appears to be a very generous sales fare:

• Aer Lingus operated or codeshare
• Open jaw Dublin / Europe – North America – Europe / UK
• Business class return from under £700
• Availability from October to April 2027

Destinations include major US cities and Toronto / Canada. It is generally cheaper to fly from Dublin and return to Spain (Barcelona and Madrid), but many combinations are available.

Dublin – Toronto – Barcelona

Dublin – San Francisco – Madrid

Codeshares to more destinations are available with BA, Iberia, United, Air Canada and more. Direct return to London is possible.

Madrid – New York – London

Dublin – Vancouver & New York – London