AirHint found the following cheapest one-way flights from Boston (BOS) to Madrid (MAD) in May 2026 (see full year).
One-Way flights
| 04 May | Air France | ||
| 10 May | Iberia | direct | |
| 11 May | Air France | ||
| 07 May | Air France | ||
| 14 May | Air France | ||
| 09 May | KLM | ||
| 08 May | KLM | ||
| 09 May | jetBlue | direct | |
| 02 May | jetBlue | direct | |
| 01 May | jetBlue | 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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