UPDATE: The planned strike has been averted. See this article on GoTimeshare.org for more information: 

easyJet is warning passengers to check their flight status given uncertainty over flying due to the Spanish air strike threat, before they leave for the airport and have said they will transfer passengers to an alternative flight to the same destination free of charge, all of which can be done at www.easyjet.com

Passengers who did not book their flights through the website, however, should request a flight rebooking by calling the call centre on 0871 244 23661.

Refunds may also be an option, although if flights were originally booked through travel agents, the flight cost must be claimed back through that agency.

UPDATE!

The planned strike has been averted. See this article on GoTimeshare.org for more information: 

Ryanair has asked the Spanish government to help ease the effects of the Spanish air traffic controller strike which, if it goes ahead, will start August 18th and last three days.

The strikers are protesting at government plans to change their work hours and reduce overtime pay and more than 2,000 nationally have voted for the strike which could affect some two million passengers (many Spanish workers take their holidays in August and the strike couldn’t come at a busier time).

The dispute with the Spanish government has dragged on since February, when overtime hours and controllers’ pay were slashed. According to some reports, some controllers were earning as much as £290,000 a year, more than the Spanish prime minister Mr. Zapatero earns, and the government wants to increase their hours and shorten their rest breaks.

With a massive backlog of flights now facing holidaymakers trying to get home, despite the opening of European airports, timeshare resorts which are members of the Resort Development Organisation (RDO) have been working tirelessly to provide emergency accommodation for stranded guests, helping them get home whenever possible now that the flight ban is officially over.

Families with children have found themselves taking an unexpected extended holiday in sun-soaked holiday destinations such as the Costa del Sol, Cyprus, The Canary Islands and the Algarve, right before the start of the new school term.

A number of resorts have stepped in to provide last minute arrangements and accommodation for families unable to get home, with resort teams working flat out to ensure owners either have somewhere to stay if no immediate flights are available, or help with last minute travel arrangements.

Airport delays aren't part of the holiday plan but they happen. Here are the world's top 10 most punctual airlines with the best record of getting you there on time.