£23 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 19/10. 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

KAYAK searches hundreds of travel sites at once for deals on flights from Belfast Intl Airport to Portsmouth

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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

Sat, 11 Oct - Thu, 23 Oct
easyJet Logo
13:35 - 14:50BFS-SOU
1h 15mdirect
easyJet Logo
15:05 - 16:25SOU-BFS
1h 20mdirect
£39easyJet
Find Deal
Thu, 9 Oct - Thu, 23 Oct
easyJet Logo
13:05 - 14:20BFS-SOU
1h 15mdirect
easyJet Logo
15:05 - 16:25SOU-BFS
1h 20mdirect
£42easyJet
Find Deal
Sun, 19 Oct - Mon, 20 Oct
easyJet Logo
10:10 - 11:25BFS-SOU
1h 15mdirect
easyJet Logo
18:35 - 19:55SOU-BFS
1h 20mdirect
£46easyJet
Find Deal
Sat, 11 Oct - Sat, 18 Oct
easyJet Logo
13:35 - 14:50BFS-SOU
1h 15mdirect
easyJet Logo
15:20 - 16:40SOU-BFS
1h 20mdirect
£51easyJet
Find Deal
Sun, 12 Oct - Thu, 16 Oct
easyJet Logo
10:10 - 11:25BFS-SOU
1h 15mdirect
easyJet Logo
15:05 - 16:25SOU-BFS
1h 20mdirect
£84easyJet
Find Deal
Thu, 16 Oct - Thu, 23 Oct
easyJet Logo
13:05 - 14:20BFS-SOU
1h 15mdirect
easyJet Logo
15:05 - 16:25SOU-BFS
1h 20mdirect
£88easyJet
Find Deal
Mon, 20 Oct - Mon, 20 Oct
easyJet Logo
06:40 - 10:35BFS-SOU
3h 55m1 stop
easyJet Logo
18:35 - 19:55SOU-BFS
1h 20mdirect
£89easyJet
Find Deal
Fri, 17 Oct - Tue, 21 Oct
easyJet Logo
10:30 - 11:45BFS-SOU
1h 15mdirect
easyJet Logo
12:25 - 22:40SOU-BFS
10h 15m1 stop
£108easyJet
Find Deal
Sat, 11 Oct - Thu, 23 Oct
Multiple Airlines Logo
06:00 - 07:55BFS-SOU
25h 55m2 stops
Multiple Airlines Logo
15:05 - 16:25SOU-BFS
1h 20mdirect
£130Multiple Airlines
Find Deal
Sun, 19 Oct - Mon, 20 Oct
Multiple Airlines Logo
10:10 - 11:25BFS-SOU
1h 15mdirect
Multiple Airlines Logo
20:30 - 15:20SOU-BFS
18h 50m2 stops
£140Multiple Airlines
Find Deal
Useful Info

Good to know - Cheap tickets from Belfast to Portsmouth

Low seasonMarch
Cheapest flight£23
Best time to beat the crowds (31% less expensive on average)
Most popular time to fly (43% 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.

  • How long does a flight from Belfast Intl Airport to Portsmouth take?

    Direct flights cover the 326 miles separating Belfast Intl Airport and Portsmouth in about 1h 15m.

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

    Consider leaving on a Saturday 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 Mondays and the most expensive ones on Thursdays.

  • 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.

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 33 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 1302 reviews
6.5Food
8.0Crew
7.1Comfort
7.3Boarding
6.9Entertainment
Airline reviews

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

8.0 ExcellentAnonymous, Sept 2025CDG - DUB
Read more Aer Lingus reviews

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

A caveat, we flew during the ransomware attack that hacked the boarding and luggage tracking systems. I wouldn't ever be angry at the employees for that, but I WOULD be (and am) angry that communication was incredibly poor, that we got few live updates, and that the employees seemed uninformed and ill-equipped to handle the situation. Clear, honest, open communication and instructions would have benefited the situation. Unfortunately, there were literally no gate agents to talk to, no airport employees to direct people, and no clear signage (the app pretty much said "we don't know what gate your flight is."). Beyond this nightmare, the security was the usual dehumanizing circus of "Security Theater" which is... as we all know... only for show and completely useless. All three airports on this journey dropped the ball so hard. The flight industry can do so much better. Aer Lingus can do so much better.

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

The worst Terrible Late for connecting flights. Made flight without luggage! I am still waiting for my luggage to be returned! I paid premium for this flight. My luggage should have been flown to Hartford instead they keep telling me it was put on a jet blue flight and is in New York! I flew Hartford to avoid New Yofk! The flight over was also unpleasant. We were stuck in a bus at Edinburgh airport for 30 minutes then our luggage again could not be found! Very poor service. Very disappointed . I need my luggage to be returned. Shirley Baliki 42 Blaine Sreet Fairfield CT

Baggage fees are deceptive! When I booked this flight, I purchased two tickets and had indicated that I wanted one checked bag. That increased the ticket price by about $100 PER TICKET!. When we went to check in, I was told that I could only check ONE bag, even though I had purchased TWO tickets. I had to pay an additional $50 each way for my wife’s bag. In my opinion, I paid twice for her bag.

Wonderful experience from start to finish. Extremely nice flight staff and much better food than other airlines I have used. Arrived right on time.

Delays resulting in missed connecting flight. Attendant failed to arrange special assistance as promised to get us on connecting flight. Robyn was the particular attendant.

Very good except for the boarding process which was more hectic than it should have been

My flights with Aer Lingus were very good and I will definitely fly with them. Again in future trips to Ireland and Scotland.

Best travel day I've had in a long time. Everything went perfectly, no delays. 10 out of 10

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.

The terminals are far away, be prepared to walk. Also, You climb stairs to the plane since there are no aero bridges. Boarding was haphazard not in multiple groups, so stand in line early. Hard to find place to stow cabin baggage if you are behind in the line. You can purchase food on the plane. There are vegetarian options.

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.

Not happy with price of luggage or that we had no choice but to pay whether cabin or hold. I didn't book seats but this is unnecessary extra money along with suitcase

We accidentally purchased twice the bags we needed. Our fault, but the ticket was not clear to us, and it asked us to purchase bags at checkin. When we notified them to get credit back at the airport, they said to contact customer service. We flew the flight and then contracted customer service. They said no credits after the flight has flown. Not customer service oriented at all. They know we didn’t check that many bags and kept our money for a service they did not provide. Be aware and very careful of what you are purchasing from them because they will not make it right if there is an error.

sadly in Basel & Naples- no jetway we had to climb up and down stairs with our max size carry-on luggage, which was not fun!!!

This was our first time using them. I gave okay ratings for food and entertainment because it was minimal or not provided so I couldn't judge, but much better than most budget carriers we have ever used.

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

Complete your trip to Portsmouth with a hotel stay or car hire

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.