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Cheap flights from Belfast to Portsmouth from £35

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — LHR
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Belfast to Portsmouth are usually found in March or January, booked 34 days in advance, depart on a Monday or Wednesday and return on a Tuesday

Cheap flight deals from Belfast to Portsmouth

Keep the following information in mind while searching for Belfast to Portsmouth flight deals. Data was last updated 12 September 2025.

Round-trip from

£49

One-way from

£35

Popular in

June

Cheapest in

March

Average price

£108
easyJet
  • easyJet
  • 6/10-18/10
  • Nonstop
  • 2h 35m total
  • Belfast to Portsmouth
Search Deals
easyJet
  • easyJet
  • 18/10
  • Nonstop
  • 1h 15m total
  • Belfast to Portsmouth
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£22 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Belfast to Portsmouth

Cheapest flights from Belfast to Portsmouth
Explore the most affordable flight options available from Belfast to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Mon 6/1010:05BFS - SOU
Nonstop1h 15measyJet
Sat 18/1015:20SOU - BFS
Nonstop1h 20measyJet
Deal found 10/9£49
Mon 29/910:05BFS - SOU
Nonstop1h 15measyJet
Thu 2/1015:05SOU - BFS
Nonstop1h 20measyJet
Deal found 12/9£80
Mon 27/1006:40BHD - SOU
Nonstop1h 45mAer Lingus
Mon 3/1112:20SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 11/9£81
Sat 20/906:40BHD - SOU
Nonstop1h 45mAer Lingus
Sun 21/908:55SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 10/9£83
Sat 4/1013:35BFS - SOU
Nonstop1h 15measyJet
Mon 13/1011:50SOU - BFS
Nonstop1h 20measyJet
Deal found 12/9£86
Fri 28/1114:40BHD - SOU
Nonstop1h 35mAer Lingus
Fri 5/1216:45SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 10/9£103
Sat 4/1013:35BFS - SOU
Nonstop1h 15measyJet
Sun 5/1012:00SOU - BFS
Nonstop1h 20measyJet
Deal found 10/9£109
Mon 6/1010:05BFS - SOU
Nonstop1h 15mMultiple Airlines
Sat 18/1018:55SOU - BFS
1 stop27h 55mMultiple Airlines
Deal found 10/9£120
Fri 3/1010:30BFS - SOU
Nonstop1h 15measyJet
Sun 5/1012:00SOU - BFS
Nonstop1h 20measyJet
Deal found 10/9£126
Sun 28/1206:40BHD - SOU
Nonstop1h 45mAer Lingus
Tue 30/1208:55SOU - BHD
Nonstop1h 40mAer Lingus
Deal found 11/9£139
Mon 29/916:20BFS - SOU
2 stops15h 55mMultiple Airlines
Thu 2/1015:05SOU - BFS
Nonstop1h 20mMultiple Airlines
Deal found 12/9£148
Mon 27/1011:05BHD - SOU
1 stop6h 30mMultiple Airlines
Mon 3/1112:20SOU - BHD
Nonstop1h 35mMultiple Airlines
Deal found 11/9£159

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast to Portsmouth 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 12 September 2025.
Use the filters below to find and compare flights from Belfast to Portsmouth that are best for you.

Fly from

Belfast

Fly to

Portsmouth

Route

Depart

Return

Price

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 6/10

10:05-11:20

Nonstop1h 15m

Southampton Eastleigh

Sat 18/10

15:20-16:40

Nonstop1h 20m

£49

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 29/9

10:05-11:20

Nonstop1h 15m

Southampton Eastleigh

Thu 2/10

15:05-16:25

Nonstop1h 20m

£80

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Mon 27/10

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Mon 3/11

12:20-13:55

Nonstop1h 35m

£81

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Sat 20/9

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Sun 21/9

08:55-10:30

Nonstop1h 35m

£83

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 4/10

13:35-14:50

Nonstop1h 15m

Southampton Eastleigh

Mon 13/10

11:50-13:10

Nonstop1h 20m

£86

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Fri 28/11

14:40-16:15

Nonstop1h 35m

Southampton Eastleigh

Fri 5/12

16:45-18:20

Nonstop1h 35m

£103

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 4/10

13:35-14:50

Nonstop1h 15m

Southampton Eastleigh

Sun 5/10

12:00-13:20

Nonstop1h 20m

£109

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 6/10

10:05-11:20

Nonstop1h 15m

Southampton Eastleigh

Sat 18/10

18:55-22:50

1 stop27h 55m

£120

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 3/10

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Sun 5/10

12:00-13:20

Nonstop1h 20m

£126

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 29/9

16:20-08:15

2 stops15h 55m

Southampton Eastleigh

Thu 2/10

15:05-16:25

Nonstop1h 20m

£148

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 29 results
1
2
3

Best time to book a flight from Belfast to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Belfast 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 Belfast to Portsmouth

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

Use this chart to determine the optimal time to book a return flight from Belfast to Portsmouth. Price data was last updated on 29 August 2025.

The price you pay for your flight from Belfast to Portsmouth may vary depending on when you book. For the best chance of a lower fare, look to book 33 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Belfast to Portsmouth (average of £112). Flying from Belfast to Portsmouth in August is currently the most expensive (average of £164). 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 BFS to P0R?

Find hourly flight availability from Belfast to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 September 2025.

When flying from Belfast to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Use this chart to determine the cheapest time to fly return from Belfast to Portsmouth. Price data was last updated on 16 December 2024.

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

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. 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 Portsmouth. Reviews last updated 12 September 2025.
Get a feel of what it's like to fly with Aer Lingus and easyJet from Belfast to Portsmouth by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Food

6.5

Boarding

7.3

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Aer Lingus
7.2
Good
1,271 reviews
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Food

6.5

Boarding

7.3

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
easyJet
6.9
Okay
1,820 reviews
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Food

6.5

Boarding

7.3

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.

Related info for your journey

Find useful and relevant information for your journey from Belfast to Portsmouth. 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 Belfast to Portsmouth?

    There are many flights that can get you from Belfast to Portsmouth in 1h 15m. Fly via easyJet or Aer Lingus to get the fastest option. Airlines will cover a distance of 326 mi. All flights are typically direct.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast to Portsmouth 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 Belfast to Portsmouth?

    Currently, January is the cheapest month in which you can book a flight from Belfast to Portsmouth (average of £112). Flying from Belfast to Portsmouth in August is currently the most expensive (average of £164). 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 Belfast to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Belfast to Portsmouth

Discover the top 6 airlines that operate flights from Belfast to Portsmouth. 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 12 September 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£28Average£52FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
easyJetCheapest£29Average£86FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£50Average£65FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£66Average£153FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£74Average£153FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LoganairCheapest£129Average£210FlexibilityNo 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 Belfast to Portsmouth?

Deals for Belfast to Portsmouth flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Belfast to Portsmouth for you. Better yet — we are completely free to use.

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

Certainly. Search results for flights to Portsmouth from Belfast shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on Belfast to Portsmouth flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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