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

Return flights

14 Mar - 20 Mar	Scandinavian Airlines
07 Mar - 13 Mar	Scandinavian Airlines
13 Mar - 20 Mar	TAP	direct
05 Mar - 12 Mar	TAP	direct
07 Mar - 13 Mar	TAP	direct
02 Mar - 09 Mar	TAP	direct
03 Mar - 10 Mar	TAP	direct
04 Mar - 11 Mar	TAP	direct
08 Mar - 15 Mar	TAP	direct
16 Mar - 23 Mar	TAP	direct
28 Mar - 03 Apr	Turkish Airlines
23 Mar - 18 Apr	Scandinavian Airlines
27 Mar - 18 Apr	Turkish Airlines
25 Mar - 01 Apr	TAP	direct
23 Mar - 18 Apr	TAP	direct
28 Mar - 03 Apr	TAP	direct

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Washington to Lisbon in March from $521

Return flights