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

Return flights

29 Jul - 30 Jul	Aer Lingus
29 Jul - 05 Aug	Aer Lingus
29 Jul - 06 Aug	Aer Lingus
28 Jul - 05 Aug	Ryanair
29 Jul - 02 Aug	Aer Lingus
27 Jul - 30 Jul	Aer Lingus
29 Jul - 31 Jul	Aer Lingus
27 Jul - 02 Aug	Aer Lingus
27 Jul - 29 Jul	Aer Lingus
21 Jul - 29 Jul	Ryanair
25 Jul - 30 Jul	TAP
29 Jul - 01 Aug	Aer Lingus
25 Jul - 08 Aug	TAP
28 Jul - 02 Aug	Ryanair
20 Jul - 31 Jul	TAP
21 Jul - 31 Jul	Ryanair
29 Jul - 29 Jul	Ryanair
22 Jul - 29 Jul	Ryanair
24 Jul - 06 Aug	Ryanair
29 Jul - 01 Aug	Aer Lingus	direct

Also check the deals for one-way 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 return flights from Dublin to Lisbon in July from 164€

Return flights