Edinburgh, London, and Shannon are included in Lufthansa's new offer. Tickets must be booked by August 5.
American's new Hawaii offer competes with a similar sale from Delta. Flights to Honolulu, Kona, and Lihue are featured.
Travelers departing from Boston, Chicago, New York, or Washington, D.C., can take advantage of Aer Lingus' Ireland deal. Book tickets by August 5.
