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

Return flights

11 May - 18 May	Scandinavian Airlines
08 May - 13 May	Icelandair
01 May - 06 May	Scandinavian Airlines
09 May - 15 May	Icelandair
08 May - 11 May	Icelandair
05 May - 12 May	Aer Lingus
04 May - 11 May	Scandinavian Airlines
03 May - 10 May	Icelandair
12 May - 19 May	TAP
20 May - 25 May	Scandinavian Airlines
26 May - 02 Jun	TAP
27 May - 03 Jun	TAP
18 May - 01 Jun	Air Canada
20 May - 01 Jun	TAP
25 May - 01 Jun	TAP
28 May - 04 Jun	TAP
28 May - 07 Jun	TAP
23 May - 02 Jun	Icelandair
31 May - 07 Jun	TAP
29 May - 14 Jun	WestJet

Also check the deals for one-way flights from Washington to Barcelona 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 Washington to Barcelona in May from $493

Return flights