AirHint found the following cheapest one-way flights from Boston (BOS) to Madrid (MAD) in May 2026 (see full year).
One-Way flights
| 18 May | LEVEL | ||
| 01 May | Iberia | ||
| 15 May | Air Canada | ||
| 20 May | Azores Airlines | ||
| 24 May | TAP | ||
| 13 May | Iberia | direct | |
| 20 May | Iberia | direct | |
| 18 May | Iberia | direct | |
| 05 May | Iberia | direct | |
| 10 May | Iberia | direct |
Also check the deals for return flights from Boston to Madrid in May.
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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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