AirHint found the following cheapest one-way flights from Boston (BOS) to Lisbon (LIS) in July 2026 (see full year).
One-Way flights
| 29 Jul | LEVEL | ||
| 28 Jul | SWISS | ||
| 06 Jul | Aer Lingus | ||
| 08 Jul | TAP | ||
| 13 Jul | TAP | ||
| 15 Jul | TAP | ||
| 28 Jul | TAP | direct | |
| 29 Jul | TAP | direct | |
| 08 Jul | TAP | direct | |
| 12 Jul | TAP | direct |
Also check the deals for return flights from Boston to Lisbon in July.
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