https://www.cheapjet.com/SearchByPrice/ABE/2/Cheapest-flights-from-Allentown.htm Cheapest flights from Allentown en https://www.cheapjet.com/i/logo/named/cheapjet-com.png https://www.cheapjet.com/SearchByPrice/ABE/2/Cheapest-flights-from-Allentown.htm https://www.cheapjet.com/Flights/searching.aspx?depIATA=ABE&destIATA=MAD&depart=2026-12-17&return=2027-1-5&adults=1&infants=0&children=0&flway=false&flight=true&lang=en&currency=US https://www.cheapjet.com/Flights/searching.aspx?depIATA=ABE&destIATA=MAD&depart=2026-12-17&return=2027-1-5&adults=1&infants=0&children=0&flway=false&flight=true&lang=en&currency=US Flights Spain Allentown - Madrid Barajas (Return)<br/>17 December - 5 January<br/>$1,688.04 USD incl. payment fees, <a href="https://www.cheapjet.com/redirect.aspx?opid=86&url=&DepartAirport=ABE&DestinationAirport=MAD&Adults=1&Children=0&Infants=0&DepartureDate=17/12/2026&ReturnDate=05/01/2027&FLWay=2" target=_blank>KLM</a><br/>Found: 13 Hours Ago<br/><a href="https://www.cheapjet.com/Flights/ABE/MAD/Cheap-flights-from-Allentown-to-Madrid.htm" target=_blank>More offers to this destination - CheapJet.com</a> Sun, 18 Oct 2026 18:47:13 +0200