2

Terminal A Delta uses exclusively Terminal A in Boston (unless it's an international arrival which go through immigration and customs at Terminal E)


1

Searching the flight number on Google will typically indicate the departure terminal, e.g. for Qatar Airways QR 738, which departs from SFO airport: Otherwise the departure airport will very likely have the information as well. https://flightaware.com/live/flight/QTR738 is another source.


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