Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Southampton to Belfast Intl Airport from £42

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — BFS
22 Feb — 1 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Southampton Eastleigh to Belfast Intl are usually found in March or May, booked 83 days in advance, depart on a Tuesday or Saturday and return on a Saturday

Cheap flight deals from Southampton to Belfast Intl

Enter your travel dates to find the best prices.

Cheapest flights from Southampton to Belfast Intl
Explore the most affordable flight options available from Southampton to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 January 2026.

Sat 2/512:15
SOU
-
BFS
Nonstop1h 15m
easyJet
Tue 5/507:15
BFS
-
SOU
1 stop5h 35m
easyJet
Deal found 21/1£97
Tue 24/309:20
SOU
-
BFS
1 stop7h 40m
easyJet
Fri 27/310:35
BFS
-
SOU
1 stop6h 35m
easyJet
Deal found 21/1£103
Fri 26/612:20
SOU
-
BFS
Nonstop1h 15m
easyJet
Sun 28/610:50
BFS
-
SOU
Nonstop1h 15m
easyJet
Deal found 22/1£106
Tue 17/309:20
SOU
-
BFS
1 stop7h 40m
easyJet
Wed 18/320:40
BFS
-
SOU
1 stop20h 40m
easyJet
Deal found 21/1£111
Fri 24/712:20
SOU
-
BFS
Nonstop1h 15m
easyJet
Sun 26/710:50
BFS
-
SOU
Nonstop1h 15m
easyJet
Deal found 22/1£113
Thu 9/411:40
SOU
-
BFS
1 stop9h 30m
easyJet
Sun 12/410:50
BFS
-
SOU
Nonstop1h 15m
easyJet
Deal found 21/1£123
Sat 7/313:55
SOU
-
BFS
2 stops18h 30m
easyJet
Sat 14/307:00
BFS
-
SOU
1 stop6h 10m
easyJet
Deal found 21/1£166

Find flight deals from Southampton to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to Belfast Intl (BFS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 23 January 2026.

Round-trip from

£97

One-way from

£42

Popular in

December

Cheapest in

March

Average price

£83

Good round-trip deal

£55 or less
easyJet
  • easyJet
  • 12/5-15/5
  • 2 total stops
  • 31h 45m total
  • Southampton to Belfast
Search Deals
easyJet
  • easyJet
  • 13/4
  • Nonstop
  • 1h 15m total
  • Southampton to Belfast
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£17 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 January 2026
Search Deals
Price to beat on a round-trip flight from Southampton Eastleigh to Belfast Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Southampton to Belfast Intl 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 23 January 2026.
Use the filters below to find and compare flights from Southampton to Belfast Intl Airport that are best for you.

Fly from

Southampton

Fly to

Belfast Intl

Route

Depart

Return

Price

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Sat 2/5

12:15-13:30

Nonstop1h 15m

Belfast Intl

Tue 5/5

07:15-12:50

1 stop5h 35m

£97

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Tue 24/3

09:20-17:00

1 stop7h 40m

Belfast Intl

Fri 27/3

10:35-17:10

1 stop6h 35m

£103

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Fri 26/6

12:20-13:35

Nonstop1h 15m

Belfast Intl

Sun 28/6

10:50-12:05

Nonstop1h 15m

£106

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Tue 17/3

09:20-17:00

1 stop7h 40m

Belfast Intl

Wed 18/3

20:40-17:20

1 stop20h 40m

£111

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Thu 9/4

11:40-21:10

1 stop9h 30m

Belfast Intl

Sun 12/4

10:50-12:05

Nonstop1h 15m

£123

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Tue 24/3

09:20-17:00

1 stop7h 40m

Belfast Intl

Fri 27/3

14:30-08:45

2 stops18h 15m

£162

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Sat 7/3

13:55-08:25

2 stops18h 30m

Belfast Intl

Sat 14/3

07:00-13:10

1 stop6h 10m

£166

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Mon 13/4

12:25-13:40

Nonstop1h 15m

£42

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Fri 20/2

17:45-07:25

1 stop13h 40m

£95

SouthamptonBelfast

SOU - BFS

SOUBFS

Southampton Eastleigh

Thu 29/1

16:05-07:25

2 stops15h 20m

£127

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 11 results
1
2

Best time to book a flight from Southampton to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Southampton 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 Southampton to Belfast Intl Airport

How far ahead should I book a flight from Southampton to Belfast Intl Airport?

Use this chart to determine the optimal time to book a return flight from Southampton to Belfast Intl. Price data was last updated on 16 January 2026.

Booking 83 days in advance of your planned departure date is, on average, the best time to get cheap flights from Southampton to Belfast Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Southampton to Belfast Intl Airport?

Currently, November is the cheapest month in which you can book a flight from Southampton to Belfast Intl Airport (average of £15). Flying from Southampton to Belfast Intl Airport 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 SOU to BFS?

Find hourly flight availability from Southampton to Belfast Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 January 2026.

One of the essential ways to save on airfare from Southampton to Belfast Intl Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at midday could potentially save you up to 34% on airfare.

Reviews of airlines servicing Belfast Intl

Get insights into the airlines that provide service to Belfast Intl. 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 Intl. Reviews last updated 23 January 2026.
Read through reviews of airlines operating flights from Southampton to Belfast Intl Airport, such as Aer Lingus and easyJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,442 reviews
Check prices

Food

6.6

Comfort

7.1

Overall

7.2

Entertainment

6.9

Boarding

7.4

Crew

8.0

Reviews

1 / 20
4.0
Okay

Catherine,Dec 2025

AGP - DUB

Flight out to Malaga was terrific on A330 but flight back on A320 no where as good. Seat was uncomfortable, sweet wrappers & toilet paper on the floor at my seat. Rubbish in holder of seat in front. All unpleasant. Flight itself was fine & crew otherwise very good.
Aer Lingus
7.2
Good
1,442 reviews
Aer Lingus
7.2
Good
1,442 reviews
Check prices

Food

6.6

Comfort

7.1

Overall

7.2

Entertainment

6.9

Boarding

7.4

Crew

8.0

Reviews

1 / 20
4.0
Okay

Catherine,Dec 2025

AGP - DUB

Flight out to Malaga was terrific on A330 but flight back on A320 no where as good. Seat was uncomfortable, sweet wrappers & toilet paper on the floor at my seat. Rubbish in holder of seat in front. All unpleasant. Flight itself was fine & crew otherwise very good.
easyJet
6.9
Okay
1,864 reviews
Aer Lingus
7.2
Good
1,442 reviews
Check prices

Food

6.6

Comfort

7.1

Overall

7.2

Entertainment

6.9

Boarding

7.4

Crew

8.0

Reviews

1 / 20
4.0
Okay

Catherine,Dec 2025

AGP - DUB

Flight out to Malaga was terrific on A330 but flight back on A320 no where as good. Seat was uncomfortable, sweet wrappers & toilet paper on the floor at my seat. Rubbish in holder of seat in front. All unpleasant. Flight itself was fine & crew otherwise very good.

Related info for your journey

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

  • What airport do you fly from for flights from Southampton to Belfast Intl?

    If you book a flight to Belfast Intl from Southampton, you will be flying from Eastleigh, which is the city’s only airport. Southampton Eastleigh (SOU) is located 3.5 mi from the center of Southampton. There are 0 flights from Eastleigh to Belfast Intl per day from 2 different airlines.

  • How long is the flight from Southampton to Belfast Intl Airport?

    There are many flights that can get you from Southampton to Belfast Intl Airport in 1h 15m. Fly via easyJet to get the fastest option. The distance between Southampton and Belfast Intl Airport is about 326 mi. All flights are typically direct.

  • What are the cheapest airlines flying from Southampton to Belfast Intl Airport round-trip?

    Cheapflights users have booked flights from Southampton to Belfast Intl Airport round-trip from £28. Another airline that can offer you cheap pricing is Aer Lingus. easyJet is priced at 73% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest flights from Southampton to Belfast Intl Airport?

    The cheapest flight price from Southampton to Belfast Intl Airport is £50. On average you can expect to pay £96. The most popular route, (Southampton Eastleigh - Belfast Intl), can usually be booked for £62.

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

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

  • How can I find direct flights from Southampton to Belfast Intl?

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

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

    Yes. Cheapflights offers flight deals from Southampton to Belfast Intl 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 Southampton to Belfast Intl Airport?

    Currently, November is the cheapest month in which you can book a flight from Southampton to Belfast Intl Airport (average of £15). Flying from Southampton to Belfast Intl Airport 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

Travelling to a place near Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry
Ballymena
Cookstown
Dungannon

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.

Alternative routes for Southampton to Belfast Intl

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Belfast Intl flights
Luton to Belfast Intl flights
Heathrow to Belfast Intl flights
Heathrow to Belfast City flights
Stansted to Belfast Intl flights
Gatwick to Belfast City flights
Manchester to Belfast Intl flights
Luton to Belfast City flights
Manchester to Belfast City flights
London City to Belfast Intl flights
London City to Belfast City flights
Birmingham to Belfast Intl flights
Stansted to Belfast City flights
Bristol to Belfast Intl flights
Birmingham to Belfast City flights
Edinburgh to Belfast Intl flights
Leeds to Belfast Intl flights
Liverpool to Belfast Intl flights
Edinburgh to Belfast City flights
Liverpool to Belfast City flights
Newcastle upon Tyne to Belfast Intl flights
Leeds to Belfast City flights
Southampton to Belfast City flights
Bristol to Belfast City flights
East Midlands to Belfast Intl flights
Newcastle upon Tyne to Belfast City flights
East Midlands to Belfast City flights
Southend to Belfast Intl flights
Exeter to Belfast Intl flights
Exeter to Belfast City flights
Newquay to Belfast Intl flights
Norwich to Belfast Intl flights
Southend to Belfast City flights
Newquay to Belfast City flights
Doncaster to Belfast Intl flights
Doncaster to Belfast City flights

Top 2 airlines flying from Southampton to Belfast Intl

Discover the top 2 airlines that operate flights from Southampton to Belfast Intl. 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 23 January 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£28Average£71FlexibilityNo cancel feeOn-time86%
Search easyJet flights
Aer LingusCheapest£63Average£116FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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 Southampton to Belfast Intl?

Cheapflights makes it easy to find Southampton to Belfast Intl flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

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

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

Need flexible booking options for your flight to Belfast Intl from Southampton? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from Southampton to Belfast Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.