£20 Find Cheap Flights from Portsmouth to Belfast

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portsmouth to Belfast departing on 30/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
£87
Overall average: £95
easyJet
Mon 30/3Mon 6/4
SOU - BFS • Direct
Cheapest one-way flight
£20
Typical prices: £24-£46
easyJet
Mon 30/3
SOU - BFS • Direct
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Flight Deals
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Flight Deals

Cheap Flights from Portsmouth to Belfast

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Portsmouth to Belfast that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Portsmouth to Belfast

Mon, 30 Mar - Mon, 6 Apr
easyJet Logo
12:25 - 13:40
SOU
-
BFS
1h 15mdirect
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
£87easyJet
Fri, 8 May - Sat, 9 May
easyJet Logo
12:20 - 13:35
SOU
-
BFS
1h 15mdirect
easyJet Logo
10:30 - 11:45
BFS
-
SOU
1h 15mdirect
£89easyJet
Wed, 25 Mar - Mon, 30 Mar
easyJet Logo
09:25 - 12:45
SOU
-
BFS
3h 20m
1 stop
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
£90easyJet
Sat, 7 Mar - Tue, 10 Mar
Aer Lingus Logo
08:55 - 10:35
SOU
-
BHD
1h 40mdirect
Aer Lingus Logo
06:40 - 08:25
BHD
-
SOU
1h 45mdirect
£93Aer Lingus
Wed, 25 Mar - Mon, 30 Mar
easyJet Logo
09:25 - 12:45
SOU
-
BFS
3h 20m
1 stop
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
£94easyJet
Fri, 8 May - Sat, 9 May
Aer Lingus Logo
16:45 - 18:20
SOU
-
BHD
1h 35mdirect
Aer Lingus Logo
14:40 - 16:15
BHD
-
SOU
1h 35mdirect
£97Aer Lingus
Wed, 11 Mar - Wed, 18 Mar
Aer Lingus Logo
12:15 - 13:50
SOU
-
BHD
1h 35mdirect
Aer Lingus Logo
06:40 - 08:25
BHD
-
SOU
1h 45mdirect
£99Aer Lingus
Fri, 8 May - Sun, 10 May
Aer Lingus Logo
08:55 - 10:35
SOU
-
BHD
1h 40mdirect
Aer Lingus Logo
10:20 - 12:00
BHD
-
SOU
1h 40mdirect
£100Aer Lingus
Thu, 2 Apr - Mon, 6 Apr
Aer Lingus Logo
08:55 - 10:35
SOU
-
BHD
1h 40mdirect
Aer Lingus Logo
06:40 - 08:25
BHD
-
SOU
1h 45mdirect
£102Aer Lingus
Fri, 24 Jul - Sun, 26 Jul
easyJet Logo
12:20 - 13:35
SOU
-
BFS
1h 15mdirect
easyJet Logo
10:50 - 12:05
BFS
-
SOU
1h 15mdirect
£110easyJet
Useful Info

Good to know - Cheap tickets from Portsmouth to Belfast

Cheapest flight£20
Flight from Southampton to Belfast Intl Airport

When to book flights from Portsmouth to Belfast

Are your dates flexible? Find out the best times to travel from Portsmouth to Belfast based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

FAQs for booking flights from Portsmouth to Belfast

  • How does KAYAK find such low prices on flights from Portsmouth to Belfast?

    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 Portsmouth to Belfast.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portsmouth to Belfast?

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

  • What is the Hacker Fare option on flights from Portsmouth to Belfast?

    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 Belfast with an airline and back to Portsmouth with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portsmouth to Belfast?

    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 Belfast from Portsmouth up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Portsmouth to Belfast

 
Need help choosing which airline to fly with from Portsmouth to Belfast? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
Aer LingusOverall score based on 1449 reviews
7.1Comfort
6.9Entertainment
7.4Boarding
8.0Crew
6.6Food
Airline reviews

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

10.0 ExcellentAnonymous, Feb 2026
DUB - LHR
Read more Aer Lingus reviews

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

One of the best flight experience I have had in along time. Would fly with them again.

Like getting a bus. No great luxury but will get you there

Got us to destination alive, albeit a bit late. Luggage was left behind. No live tracking app available (available on some other airlines). Supposedly going to be delivered in next couple of days.

The connection time between the regional flight (from Newcastle) to an international flight (to The States) was too short. To require as second security scan and customs clearance within an hour and 20 mins is not enough time to make the actual connection. We had a final boarding call the minute we walked out of US customs and had to sprint (with two small children) through 20 gates to make it in time before the door closed. The concept is great in theory to clear customs before leaving Europe, but the timing needs to be adjusted. We travel abroad frequently and won’t be using this route again. Thanks.

One of the best flights I've been on in a while. Very genuinely friendly staff. Courteous, kind, respectful. On a past flight (not Aer Lingus) I remember being woken up rudely to put my seat forward. Like a child being berated for something. Oddly jarring experience when someone could just tap you gently on the shoulder and gesture kindly. But I noticed the Aer Lingus staff were incredibly patient with everyone on the plane. It's the holiday season and I noticed a lot more elderly customers on the plane than I typically see flying, and the staff went above and beyond with helping accommodate people. Service throughout the flight was flawless. They came through offering water, and picking up garbage at perfect intervals. Seemed like this flight, everyone was on point. And the flight landed early on top of that

The biking process was confusing and I was called for a seat assignment from I number I repeatedly though was spam, but the flight itself was great

I think the extra charges for seating with no added advantage and the added charges for baggage are excessive compared to other airlines.

I had zero issues with the flight. I did have issues with the staff at the airport. We missed out flight due to a delay with another airline. Talking to the staff and trying to get a new flight arranged was challenging. One guy was able to try to help us and got us on a new flight, but other staff was dismissive and clearly let us know it wasn’t their problem. All I kept thinking was… this is why air lingus has such a poor customer service reputation. I will be avoiding this airline in the future.

Food was just okay. Was surprised initially when was charged for a cup of tea when they first came through cabin for beverages. I’ve had far better long distance flights ( take some tips from Swiss airlines)

The best budget airline in Europe. Flight was on time, crew friendly and worked hard during flight and were able to meet our needs. Only downside (not the airline's fault), there were no rear steps.

It was transportation nothing more. I will give a positive rating over Ryanair. We missed our Ryanair flight the night before and received rude and unconcerned treatment from the Ryanair customer service. It was late. We were very tired and stressed after doing our best to get to the airport. The so called customer service ladies were completely unconcerned from the start. Aside from that, the flight to London seemed to be their opportunity for advertising. No time to relax as attendants were constantly in the aisle selling. I will never fly Ryanair again!!

Boarding and disembarking were smooth. Not offering free water was cheap ... I've never encountered that before on a flight.

Boarding could be better. To get through your gate but to be stood in a corridor for 20 minutes is not great.

The plane was postponed for over 2.5 hours, which meant that all four of us missed the check in time for our ongoing trip to Melbourne. We had to buy new tickets for 4 people as we had to forfeit the ones we had. The cost was really unfair. i understand that it was snowing during the first leg of the plane for that morning. Surely the cost could have been shared by the airline and not all by us. I could have bought insurance - but you can see how much I travel. I will need to chose more trustworthy airlines.

The true is that travel from London to Faro on 11/12/2025 by BA was cancelled, so I did not go to Faro, so i did not board easy flight. The mediocre qualification to you was because even when i bought an insurance, i could not change date neither obtain reimbursement. It could be ideal if you do something in order for me not to lose the purchase Thank you

Queuing for quite a while despite using the "speedy boarding".

Would not advise EasyJet for a 5 hour flight…small plane and hence a lot of turbulence. No inflight entertainment so struggle to pass time in cramped seats. We also fell victim to extra charge for our cabin bags, although bag dimensions were ok, but the handle was rigid and slightly fell outside their testing cage!!….never again will we fly with this airline and be party to their scams for making money!

The food and so are to expensive and old . Crew whas not very friendly . Apparently some other passenger can just Push through the waiting people to board while almost punching me and a father with a child down the stairs. Its always something with easy jet . The seats of row 26 where lose . And for a guy of my size there is absolutely no leg room at all .

Nice to fly out of Orly smaller easier to navigate airport. Being able to receive boarding pass well in advance of trip was comforting to know all travel was in order.

Everything you need to know for your flight from Portsmouth to Belfast

Cabin class types available on flights to Portsmouth

Cabin classes available on flights to Portsmouth. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.