Aer Lingus with 20% off fare cost to USA, offer is on for 1-week only

[Samaya]

Just received an email from Aer Lingus with 20% off the fare cost to USA, offer is on for 1-week only and for travel September through to next March.

For one week only we’re taking 20% off fares on every seat!
Choose from Britain, Europe and North America, everywhere is on sale!
Book by 7 July and travel between September and March.
Discount applies to fares before taxes and charges.
Explore more for less in New York, Boston, Orlando, Chicago, Toronto and San Francisco.

Also Quidco offering 2.5% cashback for some Aer Lingus bookings