Book cheap flights from Belfast to Lisbon with Netflights. If you can’t find what you’re looking for, simply adjust the filters to widen your search.
But when you fly is just as important as who you fly with. If you're flexible on dates, try searching by month to see when the cheapest flights are.
Another way to get a cheap flight is to book last minute – but this does mean you may not be able to get the exact flights you want.
Once you’ve chosen your flight, why not check out our deals on accommodation and car hire? You’ll find lots of hotels in Portugal, including some close to the airport – perfect if you're arriving late or leaving early.