Very difficult to help you if you do not give us more details.
Basically, between America and Europe, Aer Lingus and low cost airlines such as Virgin and Westjet are cheap airlines.
I suggest you to use some specialized booking sites that compare instantly airfares from different airlines for your real departure date (or flexible dates in summer). Include low cost airlines in your query, when possible.
Randy
From ? To ? When?
Very difficult to help you if you do not give us more details.
Basically, between America and Europe, Aer Lingus and low cost airlines such as Virgin and Westjet are cheap airlines.
I suggest you to use some specialized booking sites that compare instantly airfares from different airlines for your real departure date (or flexible dates in summer). Include low cost airlines in your query, when possible.
The most popular booking sites are listed here:
Get the best deals. it is easy and fast