Flying home to Dublin for the upcoming marriage referendum looks like it's going to be pricey for those who haven't bought well in advance. The same-sex marriage and presidential referendums take place this Friday, May 22. The same weekend as the UK bank holiday.

As a result, demand for flights has increased dramatically and prices to get home are reflecting the demand.

The cheapest one-way flight home on the day of the referendum from London stood at €192.99 with Ryanair as of Monday. However, all flights from Ryanair on Friday are now sold out.

All flights with Ryanair on the day of the referendum have sold out.

The next cheapest available one-way flight is €297.99 from Aer Lingus for a flight which leaves Gatwick at 9:10 a.m.

Flying from Heathrow is proving to be a lot more expensive also with the cheapest one-way flight from the West London airport with Aer Lingus standing at €367.99.

The day prior to the referendum flights are slightly cheaper. In the case of Aer Lingus with the cheapest flight available leaving from Heathrow at 6:40 a.m. for €131.

The demand for the cheapest flights has left very little remaining seats available with Ryanair. On Thursday, there are seven standard and seven business plus seats left at the time of writing. Each costing at least €192.99, with the business plus seats costing €247.99.

There is an abundance of tickets available still with Aer Lingus flying from both Gatwick and Heathrow but both at very high premiums.

Flights from Gatwick to Dublin with Aer Lingus on Friday, May 22.

Yes Vote group 'Get the Boat 2 Vote' is deciding to cross the sea by boat rather than the air. They're taking the Stena Line 'Rail and Sail' from Euston in London which costs £39 on Friday morning.