A LOT of passengers assume that they're entitled to some form of compensation whenever their flight is cancelled, or just delayed for a long period of time. However, that sadly isn't always the case - and passengers can be left disappointed when their compensation claims are rejected by the airlines, due to "extraordinary circumstances". 5 Passengers often think they're entitled to compensation for all cancelled or delayed flights 5 There are some extraordinary circumstances that meant airlines don't have to pay up Credit: Splash 5 These circumstances have already caused problems for passengers this summer Credit: Garrett White 5 The Sun's head of travel has explained what passengers are entitled to Credit: sbw-photo Already this summer, we've seen plenty of passengers unable to claim compensation for delayed or cancelled flights because of things that the airlines weren't responsible for.

In these instances, the carriers are not obliged to pay any extra to the customers whose travel plans have been disrupted. Included in that is air traffic control (ATC) problems, which have already made life difficult for passengers this summer - and could well do again. Staff shortages have forced airlines to cancel or delay trips, while ATC systems issues have also been at fault for some setbacks.

If this is the reason for a flight being grounded or postponed, travellers will not be eligible for any compensation. The Sun's head of travel, Lisa Minot, explained: "Airlines can say that this.