Find Cheap Flights from Belfast to Portsmouth – Compare and Save

When flying out of Belfast Intl Airport you’ll be using Belfast Intl. Portsmouth does not have its own airport so you’ll be flying into nearby Southampton Eastleigh airport, which is 14.7 mi away.

Consider leaving on a Sunday and avoid Tuesdays if you're looking for the best rates. For your return to Belfast Intl Airport, you’ll find the best rates on Wednesdays and the most expensive ones on Tuesdays.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Belfast to Portsmouth.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portsmouth from Belfast is likely to change within 7 days, so travellers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Portsmouth with an airline and back to Belfast with another airline.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portsmouth from Belfast up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

In the last 5 days, the cheapest one-way ticket between Belfast Intl Airport and Portsmouth found on KAYAK was with easyJet for £26. easyJet offered a return connection for £50 and Aer Lingus for £82.