£33 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 19/2. 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.
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Good to know - Cheap tickets from Belfast to Portsmouth

Low season

March

High season

July

Cheapest flight

£33
Best time to beat the crowds (26% less expensive on average)
Most popular time to fly (44% 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 10m.

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

    Consider leaving on a Monday and avoid Saturdays 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 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.

See more FAQs

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 32 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.
See more tips

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.
7.1
Aer LingusOverall score based on 1076 reviews
6.4Food
8.0Crew
7.3Boarding
6.8Entertainment
7.0Comfort
Airline reviews

There was a very drunk and disruptive passenger who was on the plane, right behind me. He was already drunk before boarding but was still let on the plane. He kept kicking and hitting the back of my chair the entire flight. It was an early morning flight and had zero rest on that leg

2.0 MediocreValerie, Dec 2024DUB - BCN
Read more Aer Lingus reviews

There was a very drunk and disruptive passenger who was on the plane, right behind me. He was already drunk before boarding but was still let on the plane. He kept kicking and hitting the back of my chair the entire flight. It was an early morning flight and had zero rest on that leg

Really lovely trip and flight. The flight staff were so accommodating and warm throughout!

Friendly crew who apologised and explained reason for delay. Good on board service. Rather cramped seating. Late departure.

Very sad, couldn't stop crying. Was an hour delay in Ireland and when we got to Canada the flight was boarded and couldn't get on. Was the last flight of the day. Now in a hotel waiting on a stand by.I have to got o work, so I'll go first available while my son stays in the hotel til one's available

Both flights late. Almost missed connecting flight and flight staff not willing to help expedite us off the plane.

during a very rough flight, I was forced to sit in a last row seat, fell asleep, and was forced to return to my assigned seat after the turbulence. The stewardess then used that seat to sleep.

We couldn't talk to aer lingus we had issues with the flight change and aer lingus made us talk to kayak

Flight was great. Had to wait almost 100 minutes for luggage (some problem in the delivery). This may not be an Aer Lingus problem, but an SFO problem.

Amenity kits were never handed out. There was zero friendliness and assistance by crew. Food was uneatable. One drink was offered and no wine, with dinner or before or after. Cocktails and beverages were not encouraged and when I asked for water, none was given. Poorest, most cramped business class flight I’ve ever been on.

Loved it! Best airline to fly with. Nice crew, good planes, good food!

There were a lot (4 I think) of EasyJet flights leaving Agadir, we arrived two and a half ours before our flight. Very slow to get through the booking in, passport control and security!! We had booked in on line but had to Queue with others who had not to drop our bags off!,

We boarded and then sat on the tarmac for an hour….probably not E Jets fault. But the gentleman that checked us in and took our luggage was exceptionally friendly and calming for early morning/ confused passengers. As always, it’s the people that make or break an experience, right?

Kayak sent several notifications that the flight was late. This contradicted the information on the airport boards. This was extremely confusing and we very nearly missed the flight purely because we double checked with the info desk when the flight stays said’closed’. Kayak notifications are therefore unreliable and pointlesa

Usual issues with flight delay. Perennial problem of travel by plane.

i didnt go this was a hacker booked this flight on my debit card !

Delayed almost 2 hours sitting on plane. No updates at all from flight deck and virtually no updates from cabin crew

Long delay resulted in my being unable to catch a train home and resulted in an additional £76 cost for an Uber

Be sure to check bags for 23 kg,.(50 lbs) Coming from US I chose the wrong size luggage weight when I checked in on my phone, and had to pay more when I dropped it off

The flight was delayed for over 1 hour. The boarding process is appalling making you wait for 30 minutes in the passage leading to the outside door without any seats.

All around poor experience. Barely got on flight because it was ostensibly overbooked. Forced into checking a carryon bag with empty overhead compartments. Nickeled and dimed. Charged for coffee. Despicable.

Book cheap flights from Belfast to Portsmouth

Cheapest flights to Portsmouth from Belfast found in 2024 and 2025

Recent return flight deals

10/2Mon
directeasyJet
1h 10mBFS-SOU
12/2Wed
directeasyJet
1h 20mSOU-BFS
£45
10/2Mon
directeasyJet
1h 10mBFS-SOU
12/2Wed
directeasyJet
1h 20mSOU-BFS
£47
19/2Wed
directeasyJet
1h 10mBFS-SOU
26/2Wed
directeasyJet
1h 20mSOU-BFS
£52
10/2Mon
directeasyJet
1h 10mBFS-SOU
12/2Wed
1 stopeasyJet
7h 40mSOU-BFS
£91
19/2Wed
directeasyJet
1h 10mBFS-SOU
26/2Wed
1 stopeasyJet
7h 40mSOU-BFS
£129
10/2Mon
2 stops
8h 10mBFS-SOU
12/2Wed
direct
1h 20mSOU-BFS
£149
19/2Wed
2 stopseasyJet
20h 40mBFS-SOU
26/2Wed
directeasyJet
1h 20mSOU-BFS
£164
19/2Wed
2 stopseasyJet
20h 40mBFS-SOU
26/2Wed
1 stopeasyJet
10h 35mSOU-BFS
£224
10/2Mon
2 stops
27h 00mBFS-SOU
12/2Wed
1 stop
7h 40mSOU-BFS
£225
4/1Sat
2 stops
23h 15mBFS-SOU
6/1Mon
1 stop
14h 05mSOU-BFS
£242

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Recent one-way flight deals

19/2Wed
directeasyJet
1h 10mBFS-SOU
£33

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

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