This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $144 fare is the cheapest current round-trip from Athens (ATH) to MIL on A3 flight A3878, departing 2026-08-27 at 17:00 with return on 2026-08-30.

Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count.