Cheapest return flights from Philadelphia to Buenos Aires in May from 544€

AirHint found the following cheapest return flights from Philadelphia (PHL) to Buenos Aires (AEP) in May 2026 (see full year).

Return flights

11 May - 19 May Frontier Airlines
11 May - 18 May Spirit Airlines
12 May - 19 May Frontier Airlines
12 May - 28 May Frontier Airlines
05 May - 14 May Frontier Airlines
13 May - 29 May Frontier Airlines
19 May - 02 Jun Frontier Airlines
19 May - 27 May Spirit Airlines
13 May - 02 Jun Frontier Airlines
05 May - 19 May Frontier Airlines
11 May - 21 May Frontier Airlines
15 May - 27 May Frontier Airlines
12 May - 01 Jun Frontier Airlines
20 May - 03 Jun Spirit Airlines
27 May - 03 Jun Spirit Airlines
14 May - 03 Jun Spirit Airlines
25 May - 02 Jun Spirit Airlines
17 May - 05 Jun Frontier Airlines
12 May - 04 Jun Frontier Airlines
20 May - 05 Jun Spirit Airlines

Also check the deals for one-way flights from Philadelphia to Buenos Aires in May.

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