Salman Haqqi, personal finance expert at money.co.uk, comments:
"Most British Airways customers who were due to travel today or tomorrow will already have either cancelled their flight for a full refund, or rebooked with BA or an alternative airline.
"But for those customers who are due to travel on Wednesday or Thursday, after the official strike is over, there is a chance that further flights could be delayed or even cancelled.
"Customers should contact their travel providers for up-to-date information on flights taking off later this week from Gatwick and Heathrow.
"It's important to check this information before travelling to the airport to ensure you know the latest status of your scheduled flight and you're not left waiting unnecessarily at the terminal.
"Also, BA hasn't yet confirmed if there are any flight cancellations on Wednesday or Thursday as a knock-on effect of the industrial action. So, don't cancel your flight or book a replacement until you have confirmation on the status of your existing flight, or you might be left footing the bill for two tickets if your flight takes off as scheduled.
"If BA does confirm that your flight to or from the UK is cancelled, thanks to EU regulations, you are entitled to: a full refund; or an alternative flight to your destination from a nearby airport, with the airline responsible for additional travel costs; or an alternative flight on a later date.
Can you claim if you're at the airport and your flight is delayed?
"If you experience a significant delay when you're at the airport on Wednesday or Thursday, BA is required to make your wait a comfortable one, including providing food and drink, phone calls, and even accommodation, if necessary.
"If your flight is delayed by three hours or more, you are entitled to a cash payment of 250 Euros for short flights and 400 Euros for a flight distance of 1,500 to 3,500km.
"If you are delayed by more than five hours, you have the right to cancel your journey and have the cost of your flight reimbursed - which won't be much of a consolation to those people who have already paid for accommodation and other costs at their holiday destination.
Can I claim anything on my travel insurance or credit card if my flight is cancelled on Wednesday or Thursday?
"You can't claim for your cancelled flight on your holiday or travel insurance as the airline will offer a refund or alternative booking. However, your insurance should cover any other losses, such as missed hotel stays, car hire or train tickets.
"This will depend on your travel insurance provider's policy on cancellation due to strike action and the level of cover you have in place. Some travel insurance providers will only pay for claims on policies that are purchased before the actual strike dates were announced.
"This will be stated in the terms and conditions of your travel insurance policy. If you are unsure, contact your insurer to find out what is covered under your travel insurance for airline strike action, including disruption after the strike is actually over.
"If you used a credit card and booked your flights directly with the airline, you may be able to claim a refund for delays or cancellations under Section 75 of the Consumer Credit Act."