AirHint found the following cheapest one-way flights from Boston (BOS) to Madrid (MAD) in May 2026 (see full year).
One-Way flights
| 03 May | SWISS | ||
| 02 May | LEVEL | ||
| 20 May | Air Canada | ||
| 19 May | Air Canada | ||
| 07 May | TAP | ||
| 01 May | TAP | ||
| 03 May | Iberia | direct | |
| 01 May | Iberia | direct | |
| 19 May | jetBlue | direct | |
| 02 May | Finnair | 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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