We've scanned every flight from Birmingham to St Lucia to find the best deals. If you want a cheap flight, it's best to be as flexible as you can on dates. If that day's no good for you, try searching by month to see some alternative dates.
You can use the filters on your search to see more flights and find cheaper rates – St Lucia has more than one airport. So if you don't need to fly into St Lucia Hewanorra International Airport, it's worth checking your other options.
During this peak season, accommodation prices often increase too, so it's best to book early. Or you could keep your fingers crossed and hold out for a last-minute deal.