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Cheap flights from Portsmouth to Belfast from £39

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BHD
31 ינו' — 7 פב​​​​​​​'1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Portsmouth to Belfast are usually found in January or March, booked 83 days in advance, depart on a Tuesday or Saturday and return on a Saturday

Cheap flight deals from Portsmouth to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Belfast
Explore the most affordable flight options available from Portsmouth to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 ינואר 2026.

ד' 31/1208:55SOU - BHD
Nonstop1h 40mMultiple Airlines
ו' 2/107:00BHD - SOU
1 stop12h 20mMultiple Airlines
Deal found 30/12£369
ד' 31/1208:55SOU - BHD
Nonstop1h 40mAer Lingus
ו' 2/110:10BHD - SOU
Nonstop1h 40mAer Lingus
Deal found 30/12£398
ד' 31/1216:05SOU - BFS
2 stops24h 10mMultiple Airlines
ו' 2/105:45BFS - SOU
2 stops13h 35mMultiple Airlines
Deal found 30/12£412

Find flight deals from Portsmouth to Belfast

Keep the following information in mind while searching for Portsmouth to Belfast flight deals. Data was last updated 1 ינואר 2026.

Round-trip from

£84

One-way from

£39

Popular in

December

Cheapest in

January

Average price

£72
easyJet
  • easyJet
  • 24/2-26/2
  • 2 total stops
  • 11h 25m total
  • Portsmouth to Belfast
Search Deals
Aer Lingus
  • Aer Lingus
  • 20/3
  • Nonstop
  • 1h 35m total
  • Portsmouth to Belfast
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£15 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Belfast that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 ינואר 2026.
Use the filters below to find and compare flights from Portsmouth to Belfast that are best for you.

Fly from

Portsmouth

Fly to

Belfast

Route

Depart

Return

Price

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

ג' 24/2

09:20-17:00

1 stop7h 40m

Belfast Intl

ה' 26/2

13:35-17:20

1 stop3h 45m

£84

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

א' 19/4

16:45-18:20

Nonstop1h 35m

Belfast City

ו' 24/4

06:40-08:25

Nonstop1h 45m

£85

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

ג' 13/1

08:55-10:35

Nonstop1h 40m

Belfast City

ש' 17/1

13:40-15:15

Nonstop1h 35m

£87

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

ו' 19/6

12:20-13:35

Nonstop1h 15m

Belfast Intl

א' 21/6

10:50-12:05

Nonstop1h 15m

£99

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

א' 8/2

18:20-07:45

1 stop13h 25m

Belfast Intl

ש' 28/2

07:00-13:10

1 stop6h 10m

£103

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

ה' 15/1

19:00-20:35

Nonstop1h 35m

Belfast City

ב' 19/1

08:20-11:25

1 stop3h 05m

£123

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

ו' 13/2

19:00-20:35

Nonstop1h 35m

Belfast City

ב' 16/2

10:10-11:50

Nonstop1h 40m

£127

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

ו' 13/3

19:00-20:35

Nonstop1h 35m

Belfast City

א' 15/3

10:10-11:50

Nonstop1h 40m

£136

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

ג' 24/2

09:20-17:00

1 stop7h 40m

Belfast Intl

ה' 26/2

18:40-08:45

2 stops14h 05m

£145

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

ה' 12/2

19:00-20:35

Nonstop1h 35m

Belfast City

א' 15/2

08:40-17:45

2 stops9h 05m

£151

Flights are sorted by cheapest return flights first.

Deals found on 29/12

Showing 1-10 of 24 results
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Best time to book a flight from Portsmouth to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Portsmouth with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from Portsmouth to Belfast?

Use this chart to determine the optimal time to book a return flight from Portsmouth to Belfast. Price data was last updated on 26 December 2025.

To ensure you get the cheapest price possible for a flight from Portsmouth to Belfast, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Portsmouth to Belfast?

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Belfast (average of £14). Flying from Portsmouth to Belfast in August is currently the most expensive (average of £39). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from P0R to BFS?

Find hourly flight availability from Portsmouth to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 ינואר 2026.

One of the essential ways to save on airfare from Portsmouth to Belfast is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 38% on airfare.

What is the cheapest day to fly from Portsmouth to Belfast?

Use this chart to determine the cheapest time to fly return from Portsmouth to Belfast. Price data was last updated on 27 December 2025.

Travellers seeking maximum savings on their Portsmouth to Belfast flight should consider departing on Sunday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Belfast. Reviews last updated 1 ינואר 2026.
See what other customers who have flown with Aer Lingus and easyJet from Portsmouth to Belfast have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,418 reviews
Check prices

Entertainment

6.9

Overall

7.2

Food

6.6

Crew

8.0

Comfort

7.1

Boarding

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

MAN - DUB

They did not list a gate until it was time to board.
Aer Lingus
7.2
Good
1,418 reviews
Aer Lingus
7.2
Good
1,418 reviews
Check prices

Entertainment

6.9

Overall

7.2

Food

6.6

Crew

8.0

Comfort

7.1

Boarding

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

MAN - DUB

They did not list a gate until it was time to board.
easyJet
6.9
Okay
1,855 reviews
Aer Lingus
7.2
Good
1,418 reviews
Check prices

Entertainment

6.9

Overall

7.2

Food

6.6

Crew

8.0

Comfort

7.1

Boarding

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

MAN - DUB

They did not list a gate until it was time to board.

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portsmouth to Belfast?

    easyJet and Aer Lingus can get you from Portsmouth to Belfast in just under 1h 35m. Your travel time can differ by up to 6h 05m. There are 316 mi between Portsmouth and Belfast. This flight may include one or multiple stops.

  • Can I find deals for flights from Portsmouth to Belfast that include hotel bookings?

    Yes. In addition to deals on Portsmouth to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Belfast.

  • Can I find deals for business class flights from Portsmouth to Belfast?

    Yes. Cheapflights offers flight deals from Portsmouth to Belfast by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portsmouth to Belfast?

    Currently, January is the cheapest month in which you can book a flight from Portsmouth to Belfast (average of £14). Flying from Portsmouth to Belfast in August is currently the most expensive (average of £39). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Portsmouth to Belfast

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Top 6 airlines flying from Portsmouth to Belfast

Discover the top 6 airlines that operate flights from Portsmouth to Belfast. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 ינואר 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£28Average£59FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
easyJetCheapest£29Average£79FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£40Average£73FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£64Average£114FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£81Average£159FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LoganairCheapest£133Average£190FlexibilityNo cancel feeOn-time79%
Search Loganair flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Portsmouth to Belfast?

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Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Belfast?

Cheapflights helps you find that perfect flight to Belfast from Portsmouth by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portsmouth to Belfast with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portsmouth to Belfast flexibly with Cheapflights today.

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