“Due to” is a prepositional phrase often used to indicate a cause or reason. Some synonyms for “due to” are “because of”, “owing to”, and “on account of”.
“Because of” is a very common alternative. For example, “We had to cancel the picnic because of the bad weather.” This has a similar meaning to “We had to cancel the picnic due to the bad weather.” Here, both phrases explain that the bad weather is the reason for the cancellation.
“Owing to” is a bit more formal. “Owing to his hard work, he received a promotion.” This is comparable to saying “Due to his hard work, he received a promotion.” In both cases, the person’s hard work is given as the cause for the promotion.
“On account of” also serves the same purpose. “The flight was delayed on account of technical issues.” Just like “due to”, it shows that the technical issues are the reason for the delay.
In summary, these synonyms for “due to” can be used interchangeably in many contexts to express the idea that something is the result of a particular cause or reason.