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Delta has round-trip flights from Austin (AUS) to Porto (OPO) for $581-$587 with a connection. Flights in March. Departures on Monday, Thursday, and Saturday.
This deal has a limited set of dates it works with and a 7-day minimum stay requirement.
Category: <span>Porto</span>
Image Credits: ho visto nina volare, Creative Commons 2.0 (Wikipedia)