London Heathrow (LHR)Barcelona (BCN)
- non-stop flights:
- 9–11 per day
- flight duration:
- at least
direct flight availability- Sun
- Mon
- Tue
- Wed
- Thu
- Fri
- Sat
airlinesfrom $37number of non-stop flights per airline and day of the week Sun Mon Tue Wed Thu Fri Sat 
8–9 8 8 8 8 7–9 8 
2 2 2 2 2 2 2 London Heathrow (LHR)Madrid (MAD)
- non-stop flights:
- 12–16 per day
- flight duration:
- at least
direct flight availability- Sun
- Mon
- Tue
- Wed
- Thu
- Fri
- Sat
airlinesfrom $163number of non-stop flights per airline and day of the week Sun Mon Tue Wed Thu Fri Sat 
8 8 8 8 8–9 8 8 
4–6 4–7 4–6 4–7 4–7 4–5 4–7