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

Return flights

11 Mar - 17 Mar	TAP
23 Mar - 09 Apr	TAP
04 Mar - 10 Mar	TAP
15 Mar - 23 Mar	TAP
16 Mar - 23 Mar	TAP
17 Mar - 23 Mar	TAP
02 Mar - 08 Mar	TAP
04 Mar - 11 Mar	TAP
04 Mar - 12 Mar	TAP
09 Mar - 16 Mar	TAP
11 Mar - 16 Mar	TAP
16 Mar - 02 Apr	TAP
24 Mar - 09 Apr	TAP
25 Mar - 06 Apr	Air Canada
30 Mar - 06 Apr	Aer Lingus
30 Mar - 05 Apr	Scandinavian Airlines
27 Mar - 06 Apr	Allegiant Air
31 Mar - 17 Apr	Turkish Airlines
24 Mar - 05 Apr	Scandinavian Airlines
26 Mar - 06 Apr	Air Canada

Also check the deals for one-way flights from Washington to Barcelona 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 Barcelona in March from $393

Return flights