Cheap Flights from London to Barcelona Starting at $21

The route London — Barcelona is served by many carriers — 7 in total, including EasyJet, Ryanair, Wizz Air, Vueling, Air Malta, LC Busre SAC, and Jet2.com. This gives passengers wide opportunities: from finding the lowest fare (from $21) to selecting flights by schedule or service class. Our service aggregates data from multiple booking systems so you can compare offers in one place. This saves time and money: no need to check dozens of sites — just pick the right option and book online.

London is served by several airports, each with distinct roles. Heathrow (LHR) is the primary international hub, typically handling long-haul carriers and full-service airlines; it’s about 24 km west of central London and reachable by Heathrow Express (15–20 minutes, premium fares), the Elizabeth Line or Piccadilly Line (30–60 minutes, lower fares), and road options that can be affected by traffic. Gatwick (LGW) is a large international and leisure gateway often used by both low-cost and full-service airlines, roughly 45 km south; Gatwick Express takes about 30 minutes to Victoria, with cheaper rail alternatives in 30–50 minutes. Stansted (STN) and Luton (LTN) are usually budget-leaning airports serving many low-cost carriers and charter flights, 48–65 km north/northwest: Stansted Express to Liverpool Street is around 45–50 minutes, while buses and trains from both can take 35–90 minutes depending on route. London City (LCY) sits close to the financial districts (about 10 km east) and typically caters to business travelers with short-haul and regional services; it’s reachable by DLR or taxi in about 20–30 minutes. Pros across the network include wide airline choice and frequent services; cons can be longer transfers, variable fares, and potential congestion at peak times. Public transport fares vary by operator and time of day, while taxis and ride-shares generally cost more but offer door-to-door convenience.

Barcelona–El Prat (BCN) serves as the city’s main international gateway and regional hub, handling long-haul carriers, full-service European airlines, and a sizeable low-cost presence. It’s located about 12 km southwest of central Barcelona, with the airport split into terminals that can affect transfer times. The Aerobús express and regular public buses reach Plaça de Catalunya in roughly 30–35 minutes and usually cost modest fares; the R2 suburban train takes ~25 minutes to Passeig de Gràcia with similar ticket prices, while taxis typically need 20–30 minutes depending on traffic and may cost more. Pros: frequent services, good international connections, and several ground-transport options; cons: busy peak periods, walking between terminals, and occasionally higher fares during events or holidays.

In different months, ticket prices from London to Barcelona vary: minimum — $20 (November 2025), maximum — $95 (February 2026). Typically, the flight costs $40–$69.