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Cheap flights from Portsmouth to Belfast from £31

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BHD
6 Aug — 13 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portsmouth to Belfast are usually found in September or October, booked 64 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

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 7 July 2026.

Sun 2/808:55
SOU
-
BHD
Nonstop1h 40m
Aer Lingus
Sun 9/806:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 3/7£84
Mon 3/808:55
SOU
-
BHD
Nonstop1h 40m
Aer Lingus
Mon 10/806:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 6/7£85
Thu 16/708:55
SOU
-
BHD
Nonstop1h 40m
Aer Lingus
Sun 19/706:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 3/7£86
Wed 22/708:55
SOU
-
BHD
Nonstop1h 40m
Aer Lingus
Sat 25/706:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 6/7£89
Mon 21/912:35
SOU
-
BHD
Nonstop1h 35m
Aer Lingus
Mon 28/917:25
BHD
-
SOU
Nonstop1h 35m
Aer Lingus
Deal found 6/7£91
Sat 8/816:45
SOU
-
BHD
Nonstop1h 35m
Aer Lingus
Sun 9/806:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 2/7£93
Wed 29/716:15
SOU
-
BHD
Nonstop1h 35m
Aer Lingus
Sun 2/806:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 5/7£94
Sat 25/719:40
SOU
-
BHD
Nonstop1h 35m
Aer Lingus
Sun 26/706:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 3/7£95
Fri 31/712:20
SOU
-
BFS
Nonstop1h 15m
easyJet
Fri 7/810:35
BFS
-
SOU
Nonstop1h 15m
easyJet
Deal found 3/7£97
Fri 9/1014:30
SOU
-
BFS
1 stop4h 50m
easyJet
Sun 11/1010:50
BFS
-
SOU
Nonstop1h 15m
easyJet
Deal found 6/7£97
Wed 15/708:55
SOU
-
BHD
Nonstop1h 40m
Aer Lingus
Thu 16/706:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 7/7£97
Fri 9/1008:55
SOU
-
BHD
Nonstop1h 40m
Aer Lingus
Sun 11/1006:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 6/7£98

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 7 July 2026.

Round-trip from

£84

One-way from

£31

Popular in

December

Cheapest in

September

Average price

£121
Aer Lingus
  • Aer Lingus
  • 2/8-9/8
  • Nonstop
  • 3h 25m total
  • Portsmouth to Belfast
Search Deals
easyJet
  • easyJet
  • 12/10
  • Nonstop
  • 1h 15m total
  • Portsmouth to Belfast
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£18 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 7 July 2026.
Use the filters below to find and compare flights from Portsmouth to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Sun 30/8

12:35-13:50

Nonstop1h 15m

Belfast Intl

Wed 2/9

17:40-11:05

1 stop17h 25m

£86
Fastest return journey

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Fri 7/8

12:20-13:35

Nonstop1h 15m

Belfast Intl

Sun 9/8

10:50-12:05

Nonstop1h 15m

£103

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Wed 9/9

10:45-19:40

1 stop8h 55m

Belfast Intl

Sat 12/9

10:30-11:45

Nonstop1h 15m

£103

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Sat 25/7

12:15-13:30

Nonstop1h 15m

Belfast Intl

Sun 26/7

10:50-12:05

Nonstop1h 15m

£108

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Sat 25/7

12:15-13:30

Nonstop1h 15m

Belfast Intl

Mon 27/7

10:35-11:50

Nonstop1h 15m

£109

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Sat 1/8

12:15-13:30

Nonstop1h 15m

Belfast Intl

Sat 15/8

10:30-11:45

Nonstop1h 15m

£110

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Fri 31/7

12:20-13:35

Nonstop1h 15m

Belfast Intl

Fri 14/8

10:35-11:50

Nonstop1h 15m

£124

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Thu 6/8

11:40-06:45

1 stop19h 05m

Belfast Intl

Sun 9/8

10:50-12:05

Nonstop1h 15m

£125

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Sun 30/8

12:35-13:50

Nonstop1h 15m

Belfast Intl

Wed 2/9

20:15-11:05

2 stops14h 50m

£126

SouthamptonBelfast

SOU - BHD

SOUBHD

Southampton Eastleigh

Tue 4/8

08:55-10:35

Nonstop1h 40m

Belfast City

Tue 18/8

17:25-19:00

Nonstop1h 35m

£231

Flights are sorted by cheapest return flights first.

Deals found on 7/7

Showing 1-10 of 38 resultsSorted by cheapest first
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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

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 7 July 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 39% on airfare.

How much does it cost for a return flight from Portsmouth to Belfast?

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 4 July 2026.

Travellers seeking maximum savings on their Portsmouth to Belfast flight should consider departing on Wednesday at midday when fares are most often at their lowest. Friday at midday 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 7 July 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
7.3
Good
1,648 reviews
Check prices

Food

6.6

Overall

7.3

Crew

8.1

Entertainment

7.0

Boarding

7.4

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Aer Lingus
7.3
Good
1,648 reviews
Aer Lingus
7.3
Good
1,648 reviews
Check prices

Food

6.6

Overall

7.3

Crew

8.1

Entertainment

7.0

Boarding

7.4

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
easyJet
6.9
Okay
1,915 reviews
Aer Lingus
7.3
Good
1,648 reviews
Check prices

Food

6.6

Overall

7.3

Crew

8.1

Entertainment

7.0

Boarding

7.4

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

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 British Airways can get you from Portsmouth to Belfast in just under 1h 15m. Your travel time will be generally consistent. There are 326 mi between Portsmouth and Belfast. All flights are typically direct.

  • 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.

See more FAQs

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Alternative routes for Portsmouth to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
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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 7 July 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£17Average£85FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£18Average£56FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
RyanairCheapest£40Average£58FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£44Average£182FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£80Average£130FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LoganairCheapest£139Average£220FlexibilityNo cancel feeOn-time79%
Search Loganair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights helps you search for flights from Portsmouth to Belfast via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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.

Can Cheapflights notify me if prices for flights from Portsmouth to Belfast become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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