Travelling from PHL to BOS to LHR, do I need security check at BOS again?

Question

I am travelling from Philadelphia to New Delhi. The flight is with American Airlines, from Philadelphia to Boston to London To New Delhi.

Do I need to come out land-side at Boston airport, for security check? My flight from Boston to London is a code-share with British Airways.

Answer 1

Most likely yes. American Airlines arrives into terminal B and British Airways departs terminal E. There is no airside connection between the terminals.