Discover the cheapest round-trip fares from Madrid to Luxembourg, all sourced directly from airlines — no third-party markups, no hidden fees.
🗓️ Fri, Dec 19, 2025 - Fri, Jan 02, 2026 • 14 nights
🗓️ Wed, Dec 17, 2025 - Wed, Dec 31, 2025 • 14 nights
🗓️ Fri, Dec 19, 2025 - Thu, Jan 01, 2026 • 13 nights
🗓️ Thu, Dec 18, 2025 - Thu, Jan 01, 2026 • 14 nights
🗓️ Thu, Dec 18, 2025 - Wed, Dec 31, 2025 • 13 nights
🗓️ Sat, Jan 31, 2026 - Wed, Feb 11, 2026 • 11 nights
🗓️ Sat, Jan 31, 2026 - Thu, Feb 05, 2026 • 5 nights
🗓️ Wed, Feb 04, 2026 - Wed, Feb 18, 2026 • 14 nights
🗓️ Thu, Feb 05, 2026 - Wed, Feb 18, 2026 • 13 nights
🗓️ Thu, Feb 05, 2026 - Thu, Feb 19, 2026 • 14 nights
🗓️ Thu, Feb 12, 2026 - Wed, Feb 18, 2026 • 6 nights
🗓️ Thu, Feb 12, 2026 - Thu, Feb 19, 2026 • 7 nights