AirHint found the following cheapest return flights from Washington (IAD) to Madrid (MAD) in August 2026 (see full year).

Return flights

26 Aug - 02 Sep	TAP
21 Aug - 28 Aug	TAP
10 Aug - 21 Aug	Aer Lingus
16 Aug - 30 Aug	United
16 Aug - 23 Aug	TAP
04 Aug - 16 Aug	TAP
04 Aug - 17 Aug	TAP
05 Aug - 12 Aug	TAP
16 Aug - 23 Aug	Iberia	direct
06 Aug - 13 Aug	TAP
05 Aug - 14 Aug	Aer Lingus
26 Aug - 09 Sep	British Airways	direct
26 Aug - 02 Sep	Iberia	direct

Also check the deals for one-way flights from Washington to Madrid in August.

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 Madrid in August from 397€

Return flights