Flights to Spain and Portugal will be disrupted for the next few days due to industrial action.
Iberia has been forced to cancel a large number of flights tomorrow, including services between Heathrow and Madrid, due to a decision by pilots union SEPLA to strike every Friday and Monday until July 20.
The strikes started on Monday, when Iberia was forced to ground 150 flights.
The series of 30, one-day walk-outs is in protest against Iberia parent IAG's decision to launch lowcost carrier Iberia Express.
Iberia partner British Airways is giving passengers booked to fly to Spain on any of these dates the option to cancel or switch to alternative flights free of charge.
A two-hour strike by air traffic controllers in Portugal this morning, which ended at 9:00hrs today, will be repeated again tomorrow from 7:00hrs and again on April 19, 20 and 26.
EasyJet said that as a result it had cancelled a number of flights tomorrow, including its early morning service between Gatwick and Faro.
By Linsey McNeill
