£34 Find Cheap Flights from Belfast to Portsmouth

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Belfast to Portsmouth departing on 15/5. 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
£68
Overall average: £105
easyJet
Fri 15/5Sun 17/5
BFS - SOU • Direct
Cheapest one-way flight
£42
Typical prices: £54-£74
easyJet
Fri 15/5
BFS - SOU • Direct
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from Belfast to Portsmouth (BFS-SOU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Belfast to Portsmouth 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 Belfast to Portsmouth

Fri, 15 May - Sun, 17 May
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£68easyJet
Sun, 10 May - Sun, 24 May
easyJet Logo
10:50 - 12:05
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£92easyJet
Sun, 10 May - Sun, 24 May
easyJet Logo
10:50 - 12:05
BFS
-
SOU
1h 15mdirect
easyJet Logo
18:20 - 17:35
SOU
-
BFS
23h 15m1 stop
£103easyJet
Sun, 10 May - Sun, 24 May
easyJet Logo
21:25 - 12:25
BFS
-
SOU
15h 00m1 stop
easyJet Logo
18:20 - 18:50
SOU
-
BFS
24h 30m1 stop
£122easyJet
Thu, 18 Jun - Mon, 22 Jun
easyJet Logo
08:20 - 07:25
BFS
-
SOU
23h 05m1 stop
easyJet Logo
12:25 - 13:40
SOU
-
BFS
1h 15mdirect
£142easyJet
Fri, 20 Feb - Fri, 27 Feb
Multiple Airlines Logo
20:20 - 08:45
BFS
-
SOU
12h 25m2 stops
Multiple Airlines Logo
17:45 - 07:25
SOU
-
BFS
13h 40m1 stop
£178Multiple Airlines
Fri, 20 Feb - Fri, 27 Feb
Multiple Airlines Logo
20:20 - 08:45
BFS
-
SOU
12h 25m2 stops
Multiple Airlines Logo
19:50 - 15:10
SOU
-
BFS
19h 20m2 stops
£179Multiple Airlines
Fri, 20 Feb - Fri, 27 Feb
easyJet Logo
10:35 - 17:10
BFS
-
SOU
6h 35m1 stop
easyJet Logo
17:45 - 13:05
SOU
-
BFS
19h 20m1 stop
£185easyJet
Thu, 22 Jan - Fri, 30 Jan
Multiple Airlines Logo
06:15 - 19:40
BFS
-
SOU
13h 25m2 stops
Multiple Airlines Logo
08:10 - 08:25
SOU
-
BFS
24h 15m2 stops
£188Multiple Airlines
Tue, 20 Jan - Fri, 23 Jan
Multiple Airlines Logo
21:35 - 11:55
BFS
-
SOU
14h 20m2 stops
Multiple Airlines Logo
20:10 - 15:10
SOU
-
BFS
19h 00m2 stops
£192Multiple Airlines
Useful Info

Good to know - Cheap tickets from Belfast to Portsmouth

Low seasonMarch
Cheapest flight£42
Best time to beat the crowds (40% less expensive on average)
Most popular time to fly (36% more expensive on average)
Flight from Belfast Intl Airport to Southampton

When to book flights from Belfast to Portsmouth

Are your dates flexible? Find out the best times to travel from Belfast to Portsmouth 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 Belfast to Portsmouth

  • Which airports will I be using when flying from Belfast Intl Airport to Portsmouth?

    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.

  • What’s the cheapest day of the week to fly between Belfast Intl Airport and Portsmouth?

    Consider leaving on a Wednesday 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 Tuesdays and the most expensive ones on Mondays.

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

    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.

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

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

    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.

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

    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.

  • Which airlines provide the cheapest flights from Belfast Intl Airport to Portsmouth?

    In the last 72 hours, the cheapest one-way ticket between Belfast Intl Airport and Portsmouth found on KAYAK was with easyJet for £26. easyJet offered a return connection from £25 and Aer Lingus from £72.

Top tips for finding cheap flights from Belfast Intl Airport to Portsmouth

  • There is no airport in Portsmouth. Instead, you’ll be flying into Southampton Airport when flying between Belfast Intl Airport and Portsmouth.
  • The cheapest flight from Belfast to Portsmouth was found 76 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is March.

Reviews of the top airlines flying from Belfast to Portsmouth

 
Need help choosing which airline to fly with from Belfast to Portsmouth? 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 1425 reviews
8.0Crew
7.1Comfort
6.9Entertainment
7.4Boarding
6.6Food
Airline reviews

My seat was broken. No sound available and the armrest between my wife and I was broken so it could only fold halfway up. Seats were a big close together so they felt a bit claustrophobic. Boarding was a little frustrating in Dublin as there is not sufficient room to actually queue up. Boarding was also frustrating for people behind me who were unable to use the overhead due to people abusing the privilege and putting more than one item each up there. Staff was friendly and helpful to those people.

8.0 ExcellentJohn, Jan 2026
BRU - DUB
Read more Aer Lingus reviews

My seat was broken. No sound available and the armrest between my wife and I was broken so it could only fold halfway up. Seats were a big close together so they felt a bit claustrophobic. Boarding was a little frustrating in Dublin as there is not sufficient room to actually queue up. Boarding was also frustrating for people behind me who were unable to use the overhead due to people abusing the privilege and putting more than one item each up there. Staff was friendly and helpful to those people.

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.

I was not admitted to the flight!!! i need a refund for this.

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.

They specifically asked about my flight from bordeaux to Dublin, which was fine. A little lacking but for a 1 and a half hour flight - it was more than enough. I transferred at Dublin and went to Newark. And wow that flight was incredible.

I liked that I went thru customs in Dublin instead of having to do that in LA.

Conveyer belt at the check in area stopped working and check in process was significantly slowed down.

I was pleasantly surprised and enjoyed the services of the airline since flying is not my favorite thing. My goal was to be with my brother's family in Manchester after his death. All staff was helpful, the food appreciated since I selected an overnight flight. Every aspect of the experience was comforting. I plan to return to Manchester in order to attend my brother's funeral in October and hope that I am able to find a reasonable priced flight. 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.

Liked. The check-in was pretty quick as they had 5 desks working.

Generally a good experience except for boarding in Naples on the flight back to London. We were all standing around for at least 20 minutes maybe longer as there was no seating.

Seats, WC,sizes for today's generation adults, and if technical problems arise a complimentary coffee, water nice for waiting one hours, the rest is perfect (pilot and cabin crew)

Boarding was smooth and quick. Flight departed on time. Equally evacuation upon landing was from both the front door and the back doors. Bags were on the conveyor belts before I got there. Excellent service.

First -the flight was late - more than two hours Second, not even a bottle of water at bord to give for free for this inconvenience. Three-at landing ive realised that I've lost one of my ear plug headphones and been very desperate to find it with my torch, the crew not helped at all more than that they asked to leave the plane as everyone did before me. This was the last flight from that day- extra 5 min for me with a bit of help from crew - would have bring a super review. I guess this days humanity disappeared!

I got caught using a stolen credit card number. Michelle Siziba is my name Nice to London Gatwick on 7/31/25.

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

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