American Airlines have round trip airfares travelling from Philadelphia (PHL) to Aruba (AUA) for $340, nonstop! This is a basic economy fare. On AA, you’re allowed one carry-on in addition to a personal item.
Travel Availability:
Departs PHL: Nov 26; Dec 4, 7, 10, 13
Returns: 4, 6, 7 day turn-around
Enter travel dates on Expedia and select your fares to book this deal. Bundling hotel with airfare will save money and Expedia can also sell you attraction and sightseeing tour tickets in their "things to do" section.
My sample travel itinerary is Nov 26-30, 2018
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http://www.expedia.com/