Wedding money???

Hi,

I just wanted to get your opinion on giving a couple $250 as a wedding gift. We are flying into the state that we used to live in to attend this wedding. Not super close with a couple but close enough to fly in and give them a nice gift… Do you think 250 is enough or should I just make it 300??? Venue is that a restaurant but is kinda irreverent ...let me know what you think?