It's not ideal, and it's a point of contention between fans but fixture changes are here and here to stay. In fact with Sky Sports having spent £5 billion for the TV rights, the truth is fixture changes within the Premier League are looking more and more likely. While we at Ticketbis advise to book your tickets and flights with enough time to account for these possible changes, the actual reasons for these changes varies widely!
It's all down to Sky and BT
When the Premier League's fixtures are announced, usually in July, broadcasters begin their arduous task of scheduling matches for the first two months. As you can imagine, slight alterations between matches can occur such as the time of kick-off however there are times when the date may also change, such as changing from a Saturday to a Monday. In August, broadcasters, in the Premier League's case Sky, begin scheduling for the months of October and November, then in mid-October scheduling for December takes place. Basically from October onwards, confirmation for Premier League matches are sought after, five to six weeks before each match in question. The final round matches in May aren't usually decided until every club has played their 37 matches, however as kick off times are all simultaneous, this shouldn't be something that effect fans directly. As you can imagine, it's a bit of a minefield for budding fans making long trips to see their favourite team, which is why our customer service are more than happy to help you on your long and hard-worn journey!
Europa League and Champions League effects
If Chelsea have a match against Liverpool scheduled, but their progress in the Europa League sees them play Galatasaray the following day (though it's usually on a Thursday), the chances are that their Premier League match against Liverpool will be rescheduled, partly due to the logistics, but also to give Chelsea the sufficient rest period. Unfortunately, on rare occasions this can cause a domino affect where a number of matches are then affected by the change, and we then get a shuffling matches (though usually for much later dates).
FA Cup and EFL Cup effects
In the same manner sometimes both the EFL Cup and FA Cup can affect fixtures. For example if Manchester United has a match against Leicester, which overlaps with an FA Cup Semi Final match against Fulham on Saturday, their Leicester match, for obvious reasons, will be rescheduled. Likewise, while this isn't exactly due to competitions, certain teams have also been known to form agreements with each other to play on certain dates due to overlaps in training or international friendlies.
Does not exclude riots and general upheaval
While the weather is usually a common culprit for match cancellations, there has been a number of one-off occasions that probably won't happen again but are definitely interesting facts to know. 2011's London riots took centre stage around Tottenham and, due to the sheer lack of police resources, lead to a number of cancelled Spurs matches. Another example was when Princess Dianna's death in 1997 shook the entire country and, needless to say, with an entire country in mourning, many Premier League matches were postponed.