AirHint found the following cheapest one-way flights from Dublin (DUB) to Lisbon (LIS) in July 2025 (see full year).

One-Way flights

29 Jul	Ryanair	direct
28 Jul	Ryanair	direct
27 Jul	Aer Lingus	direct
26 Jul	Aer Lingus	direct
20 Jul	Ryanair	direct
21 Jul	Ryanair	direct
07 Jul	Iberia
08 Jul	Iberia
09 Jul	Iberia
25 Jul	Aer Lingus	direct

Also check the deals for return flights from Dublin to Lisbon in July.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest one-way flights from Dublin to Lisbon in July from $85

One-Way flights