Cheapest one-way flights from Washington to Madrid in September from 197€

AirHint found the following cheapest one-way flights from Washington (IAD) to Madrid (MAD) in September 2025 (see full year).

One-Way flights

22 Sep TAP
30 Sep TAP
21 Sep SWISS
26 Sep Frontier Airlines
25 Sep Frontier Airlines
22 Sep British Airways direct
30 Sep British Airways direct
21 Sep British Airways direct
20 Sep SWISS
19 Sep SWISS

Also check the deals for return flights from Washington to Madrid in September.

Skyscanner

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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