AirHint found the following cheapest one-way flights from Dallas (DAL) to Lisbon (LIS) in May 2026 (see full year).
One-Way flights
| 24 May | Delta | ||
| 25 May | Delta | ||
| 27 May | Delta | ||
| 31 May | Air France | ||
| 30 May | Delta | ||
| 23 May | Delta | ||
| 28 May | Delta | ||
| 29 May | Delta | ||
| 19 May | Aeromexico | ||
| 26 May | Delta |
Also check the deals for return flights from Dallas to Lisbon in May.
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