AirHint found the following cheapest return flights from Dallas-Fort Worth (DFW) to Lisbon (LIS) in May 2026 (see full year).

Return flights

04 May - 11 May	Air Canada
05 May - 10 May	Delta
05 May - 21 May	Delta
03 May - 19 May	Delta
04 May - 20 May	Delta
12 May - 19 May	Finnair
13 May - 20 May	Finnair
08 May - 14 May	Finnair
01 May - 11 May	Finnair
14 May - 21 May	Finnair
25 May - 01 Jun	Finnair
18 May - 03 Jun	Air Canada
19 May - 04 Jun	Air Canada
16 May - 01 Jun	Air Canada
17 May - 02 Jun	Air Canada
29 May - 07 Jun	Finnair
20 May - 05 Jun	Air Canada
29 May - 14 Jun	Air Canada
30 May - 15 Jun	Air Canada
25 May - 10 Jun	Delta

Also check the deals for one-way flights from Dallas-Fort Worth to Lisbon in May.

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 Dallas-Fort Worth to Lisbon in May from 428€

Return flights