A number of passengers went on social media to express their anger at the latest disruption.
"Bags won't be making it onto flights, absolute shambles", said Ryan Wooldridge on Twitter.
Thousands of passengers departing London's Heathrow airport were forced to fly without larger items of luggage on Thursday morning after the baggage-handling system serving two of its terminals broke down. "Terminals 2 and 4 were unaffected by the issue", it said.
The problem affected departures from Terminals 3 and 5, with passengers advised to take only essential items in their hand luggage.
"Further to the baggage issues we experienced this morning, bag drop desks are now open and operating normally in terminals 3 and 5".
Heathrow has apologised - and says it is working on fixing the problem.