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	Finnair
04 May - 20 May	Finnair
05 May - 21 May	Iberia
06 May - 13 May	Finnair
06 May - 22 May	Finnair
07 May - 14 May	Finnair
08 May - 15 May	Finnair
17 May - 24 May	Finnair
01 May - 10 May	Finnair
07 May - 23 May	Finnair
17 May - 02 Jun	Finnair
18 May - 03 Jun	Finnair
19 May - 04 Jun	Finnair
27 May - 03 Jun	Iberia
25 May - 10 Jun	American Airlines
26 May - 11 Jun	American Airlines
31 May - 16 Jun	Finnair
23 May - 08 Jun	Finnair
24 May - 09 Jun	Finnair
28 May - 04 Jun	Finnair

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 $455

Return flights