AirHint found the following cheapest return flights from Washington (DCA) to Barcelona (BCN) in July 2025 (see full year).

Return flights

29 Jul - 05 Aug	Delta
31 Jul - 05 Aug	KLM
28 Jul - 04 Aug	United
28 Jul - 11 Aug	Iberia
29 Jul - 31 Jul	jetBlue
19 Jul - 22 Jul	ITA Airways
09 Jul - 15 Jul	ITA Airways
11 Jul - 18 Jul	ITA Airways
06 Jul - 15 Jul	jetBlue
21 Jul - 31 Jul	United
21 Jul - 12 Aug	United
14 Jul - 20 Aug	British Airways
15 Jul - 30 Jul	ITA Airways
10 Jul - 15 Jul	ITA Airways
22 Jul - 27 Jul	British Airways
22 Jul - 11 Aug	United
23 Jul - 02 Aug	British Airways
14 Jul - 26 Jul	ITA Airways
19 Jul - 17 Aug	TAP

Also check the deals for one-way flights from Washington to Barcelona in July.

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 July from 633€

Return flights