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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 29/3. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — LHR
6 Mar — 13 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Belfast to Portsmouth are usually found in March or April, booked 76 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Belfast to Portsmouth

Enter your travel dates to find the best prices.

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 4 February 2026.

Sat 19/910:30
BFS
-
SOU
Nonstop1h 15m
easyJet
Sat 26/912:15
SOU
-
BFS
Nonstop1h 15m
easyJet
Deal found 3/2£102
Fri 27/216:55
BHD
-
SOU
Nonstop1h 35m
Aer Lingus
Mon 2/319:00
SOU
-
BHD
Nonstop1h 35m
Aer Lingus
Deal found 2/2£115
Sat 19/906:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Sat 26/913:05
SOU
-
BHD
Nonstop1h 35m
Aer Lingus
Deal found 3/2£115
Fri 6/316:55
BHD
-
SOU
Nonstop1h 35m
Aer Lingus
Sun 8/319:00
SOU
-
BHD
Nonstop1h 35m
Aer Lingus
Deal found 2/2£116
Sat 25/406:40
BHD
-
SOU
Nonstop1h 45m
Aer Lingus
Sun 26/412:30
SOU
-
BHD
Nonstop1h 35m
Aer Lingus
Deal found 2/2£118
Sat 25/413:45
BFS
-
SOU
1 stop5h 35m
Multiple Airlines
Sun 26/412:35
SOU
-
BFS
Nonstop1h 15m
Multiple Airlines
Deal found 2/2£170
Sat 25/410:55
BHD
-
SOU
Nonstop1h 40m
Multiple Airlines
Sun 26/410:00
SOU
-
BHD
1 stop4h 55m
Multiple Airlines
Deal found 2/2£175
Fri 6/311:45
BFS
-
SOU
1 stop5h 25m
easyJet
Sun 8/318:20
SOU
-
BFS
1 stop13h 25m
easyJet
Deal found 2/2£176
Fri 6/314:25
BHD
-
SOU
1 stop3h 05m
Multiple Airlines
Sun 8/319:00
SOU
-
BHD
Nonstop1h 35m
Multiple Airlines
Deal found 2/2£188
Sat 21/312:45
BFS
-
SOU
1 stop4h 00m
Multiple Airlines
Sat 28/317:15
SOU
-
BFS
1 stop4h 45m
Multiple Airlines
Deal found 4/2£199
Fri 27/214:30
BFS
-
SOU
2 stops18h 15m
Multiple Airlines
Mon 2/319:55
SOU
-
BFS
2 stops20h 20m
Multiple Airlines
Deal found 2/2£208
Fri 27/217:20
BHD
-
SOU
2 stops13h 25m
Multiple Airlines
Mon 2/319:00
SOU
-
BHD
Nonstop1h 35m
Multiple Airlines
Deal found 2/2£211

Find flight deals from Belfast to Portsmouth

Keep the following information in mind while searching for Belfast to Portsmouth flight deals. Data was last updated 4 February 2026.

Round-trip from

£115

One-way from

£35

Popular in

June

Cheapest in

March

Average price

£94
Aer Lingus
  • Aer Lingus
  • 27/2-2/3
  • Nonstop
  • 3h 10m total
  • Belfast to Portsmouth
Search Deals
easyJet
  • easyJet
  • 29/3
  • Nonstop
  • 1h 15m total
  • Belfast to Portsmouth
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£16 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 February 2026
Search Deals

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 4 February 2026.
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

BHD - SOU

BHDSOU

Belfast City

Fri 27/2

16:55-18:30

Nonstop1h 35m

Southampton Eastleigh

Mon 2/3

19:00-20:35

Nonstop1h 35m

£115

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Sat 25/4

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Sun 26/4

12:30-14:05

Nonstop1h 35m

£118

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 25/4

13:45-19:20

1 stop5h 35m

Southampton Eastleigh

Sun 26/4

12:35-13:50

Nonstop1h 15m

£170

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Sat 25/4

10:55-12:35

Nonstop1h 40m

Southampton Eastleigh

Sun 26/4

10:00-14:55

1 stop4h 55m

£175

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 6/3

11:45-17:10

1 stop5h 25m

Southampton Eastleigh

Sun 8/3

18:20-07:45

1 stop13h 25m

£176

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Fri 6/3

14:25-17:30

1 stop3h 05m

Southampton Eastleigh

Sun 8/3

19:00-20:35

Nonstop1h 35m

£188

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 21/3

12:45-16:45

1 stop4h 00m

Southampton Eastleigh

Sat 28/3

17:15-22:00

1 stop4h 45m

£199

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 27/2

05:45-13:45

1 stop8h 00m

Southampton Eastleigh

Mon 2/3

19:55-16:15

2 stops20h 20m

£208

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Fri 6/3

06:30-17:00

1 stop10h 30m

Southampton Eastleigh

Sun 8/3

09:30-21:00

1 stop11h 30m

£214

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 28/2

07:55-13:10

1 stop5h 15m

Southampton Eastleigh

Sat 28/2

15:25-06:45

2 stops15h 20m

£222

Flights are sorted by cheapest return flights first.

Deals found on 2/2

Showing 1-10 of 25 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 30 January 2026.

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 76 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, February is the cheapest month in which you can book a flight from Belfast to Portsmouth (average of £13). Flying from Belfast to Portsmouth in July is currently the most expensive (average of £46). 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 4 February 2026.

A simple way to save on the total cost of your ticket is to fly from Belfast to Portsmouth in the evening. If you’re flexible enough to do this you can expect to save up to 47% on your trip compared to booking a flight in the afternoon.

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 31 January 2026.

Travellers seeking maximum savings on their Belfast to Portsmouth flight should consider departing on Tuesday at midday when fares are most often at their lowest. Sunday afternoons 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 4 February 2026.
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
1,444 reviews
Check prices

Boarding

7.4

Crew

8.0

Comfort

7.1

Food

6.6

Overall

7.2

Entertainment

6.9

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
1,444 reviews
Aer Lingus
7.2
Good
1,444 reviews
Check prices

Boarding

7.4

Crew

8.0

Comfort

7.1

Food

6.6

Overall

7.2

Entertainment

6.9

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
1,867 reviews
Aer Lingus
7.2
Good
1,444 reviews
Check prices

Boarding

7.4

Crew

8.0

Comfort

7.1

Food

6.6

Overall

7.2

Entertainment

6.9

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 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 35m. Fly via Aer Lingus, easyJet, or KLM to get the fastest option. Airlines will cover a distance of 316 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Belfast to Portsmouth one-way?

    £26 is the cheapest one-way deal found within the past few days, from easyJet. You may also be able to find cheap deals on Aer Lingus and British Airways, with prices starting from £41 and £84, respectively.

  • 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, February is the cheapest month in which you can book a flight from Belfast to Portsmouth (average of £13). Flying from Belfast to Portsmouth in July is currently the most expensive (average of £46). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 4 February 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£18Average£93FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£18Average£54FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
RyanairCheapest£47Average£62FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£75Average£151FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£80Average£160FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LoganairCheapest£132Average£198FlexibilityNo 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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