According to extensive market research gleaned from departing passengers at Dublin Airport, the top 10 long-haul connecting destinations in 2012 were as follows:
1. Sydney
2. New York
3. San Francisco
4. Los Angeles
5. Melbourne
6. Johannesburg
7. Orlando
8. Toronto
9. Singapore
10. Chicago
It appears that SFO is the no. 3 interline destination from DUB – I’d say that EI feels there is sufficient traffic on the route to merit investigating it once again.