AirHint found the following cheapest return flights from Dallas-Fort Worth (DFW) to Porto (OPO) in March 2026 (see full year).

Return flights

17 Mar - 02 Apr	American Airlines
02 Mar - 18 Mar	American Airlines
16 Mar - 01 Apr	American Airlines
10 Mar - 26 Mar	Air Canada
04 Mar - 20 Mar	British Airways
09 Mar - 25 Mar	American Airlines
24 Mar - 09 Apr	American Airlines
01 Mar - 17 Mar	Lufthansa
08 Mar - 24 Mar	Lufthansa
14 Mar - 30 Mar	Air Canada
18 Mar - 03 Apr	Air Canada
07 Mar - 23 Mar	American Airlines
31 Mar - 16 Apr	American Airlines
30 Mar - 15 Apr	American Airlines
29 Mar - 14 Apr	Air Canada
25 Mar - 10 Apr	Air Canada
11 Mar - 27 Mar	British Airways
20 Mar - 05 Apr	Air Canada
28 Mar - 13 Apr	Delta
06 Mar - 22 Mar	British Airways

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

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 Porto in March from $593

Return flights