AirHint found the following cheapest return flights from Washington (DCA) to Lisbon (LIS) in March 2026 (see full year).

Return flights

07 Mar - 15 Mar	Scandinavian Airlines
02 Mar - 19 Mar	British Airways
16 Mar - 31 Mar	British Airways
06 Mar - 15 Mar	Scandinavian Airlines
07 Mar - 28 Mar	Air Canada
22 Mar - 29 Mar	United
06 Mar - 14 Mar	Air Canada
03 Mar - 28 Mar	British Airways
30 Mar - 06 Apr	jetBlue
15 Mar - 04 Apr	jetBlue
28 Mar - 04 Apr	TAP
30 Mar - 05 Apr	TAP
27 Mar - 04 Apr	TAP
08 Mar - 14 Mar	jetBlue
29 Mar - 05 Apr	jetBlue
27 Mar - 05 Apr	jetBlue
27 Mar - 02 Apr	TAP

Also check the deals for one-way flights from Washington to Lisbon 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 Washington to Lisbon in March from $768

Return flights