Aer Lingus has low fares to Dublin from cities all around the USA, with some notable exceptions like SFO/LAX. I found lowest fares from Atlanta, Dallas and Houston at $560 round trip. October-December are lowest fares and Sep, Jan-Mar look to be about $30 more. These are Aer lingus ticket prices. UA prices are mostly astronomical, but I did find some low fare anomalies with United Airlines like $615 round trip for Houston – Dublin with the return flight on British Airways.
Here are sample fares:
New York JFK/Newark EWR – Dublin $496 nonstop
Washington IAD – Dublin $617 nonstop
Monterey MRY – Dublin $630 (most regional California airports lower fares than LAX/SFO)
San Francisco – Dublin $806 (nonstop)
Aer Lingus Atlanta ATL – Newark EWR (UA) – Dublin (Aer Lingus) – Chicago ORD (Aer Lingus) – Atlanta (UA)
$561.02 round trip Wed Nov 9 – Wed Nov 16
Aer Lingus Portland PDX – San Francisco SFO (UA) – Dublin, Ireland (Aer Lingus) – Chicago ORD (Aer Lingus) – Portland PDX (UA)
$601.02 round trip Wed Nov 9 – Tue Nov 15
United Airlines ticket with British Airways long-haul flight
Houston IAH – Chicago ORD (UA) – Dublin, Ireland (Aer Lingus) – London LHR (Aer Lingus) – Houston IAH (British Airways as Aer Lingus codeshare)
$614.73 round trip Tuesday Sep 20 – Thursday Sep 29
Aer Lingus also has BA flights via LHR on both directions for Houston – Dublin on these same dates for $632 round trip.
Aer Lingus Houston IAH – London LHR – Dublin DUB – London LHR – Houston IAH
$631.91 round trip Tue Sep 20 – Thu Sep 29
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