The cheapest round-trip from Madrid to London is about 50 EUR, usually in November 2026; April 2027 is priciest, so booking the low month saves around 49 EUR (~50%). Typical fare ~71 EUR, from 330 priced fares. Flightmussy live data, updated 2026-06-05.
Cheap flights from Madrid (MAD) to London (LHR/LGW/STN/LTN/LCY). Free, no signup, no ads, no tracking. Compare every airline across 12 months of fares on one heatmap — including low-cost carriers Google Flights often deprioritises.
Cheapest round-trip seen: 50 EUR, usually around November 2026. Typical fare ~71 EUR. Across the year prices range roughly 50–99 EUR — about 50% cheaper in the low season than the peak (April 2027). Carriers on this route include British Airways, Iberia.
Based on Flightmussy's live 12-month fare data; prices last updated 2026-06-05. Prices change constantly — search live for current fares.
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