American and United have a low fare $128 to $136 one-way between Los Angeles LAX and Boston. I sure could have used these fares last July when I needed to get from California to Boston. The deal here I early June departures with American, most of June and some July dates and much of August and September with United. American has few low fares in July, some in the second part of August, then low fare through December.
American Airlines Los Angeles LAX – Boston BOS – Philadelphia PHL – Los Angeles LAX
$262.70 Wed June 8 – Sat June 11
United Airlines Los Angeles LAX – Boston BOS – Washington IAD – Los Angeles LAX
$262.70 Tue July 12 – Thu July 21