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Cheap flights from Belfast Intl Airport to Southampton from £23

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 26/4. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SOU
21 Feb — 28 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Belfast Intl to Southampton Eastleigh are usually found in March or April, booked 76 days in advance, depart on a Saturday or Wednesday and return on a Tuesday

Cheap flight deals from Belfast Intl to Southampton

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Southampton
Explore the most affordable flight options available from Belfast Intl to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2026.

Fri 1/517:15
BFS
-
SOU
1 stop14h 05m
easyJet
Sun 3/512:35
SOU
-
BFS
Nonstop1h 15m
easyJet
Deal found 20/1£85
Sun 6/910:50
BFS
-
SOU
Nonstop1h 15m
easyJet
Sun 13/912:35
SOU
-
BFS
Nonstop1h 15m
easyJet
Deal found 21/1£86
Fri 15/517:15
BFS
-
SOU
1 stop14h 05m
easyJet
Sun 17/512:35
SOU
-
BFS
Nonstop1h 15m
easyJet
Deal found 21/1£92
Tue 17/317:35
BFS
-
SOU
1 stop15h 15m
easyJet
Thu 19/317:55
SOU
-
BFS
1 stop25h 40m
easyJet
Deal found 21/1£112
Sat 11/710:30
BFS
-
SOU
Nonstop1h 15m
easyJet
Mon 13/712:25
SOU
-
BFS
Nonstop1h 15m
easyJet
Deal found 21/1£118
Sat 7/307:55
BFS
-
SOU
1 stop5h 15m
Multiple Airlines
Sat 14/317:15
SOU
-
BFS
1 stop3h 15m
Multiple Airlines
Deal found 21/1£165
Fri 5/610:35
BFS
-
SOU
Nonstop1h 15m
easyJet
Sun 7/612:35
SOU
-
BFS
Nonstop1h 15m
easyJet
Deal found 20/1£174
Tue 17/310:35
BFS
-
SOU
1 stop6h 55m
Multiple Airlines
Wed 18/309:25
SOU
-
BFS
1 stop3h 20m
Multiple Airlines
Deal found 21/1£182

Find flight deals from Belfast Intl to Southampton

Discover tips and strategies to find the most affordable flight options for your journey from Belfast Intl (BFS) to Southampton (SOU). 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 22 January 2026.

Round-trip from

£85

One-way from

£23

Popular in

June

Cheapest in

March

Average price

£112

Good round-trip deal

£78 or less
easyJet
  • easyJet
  • 1/5-3/5
  • 1 total stop
  • 15h 20m total
  • Belfast to Southampton
Search Deals
easyJet
  • easyJet
  • 26/4
  • Nonstop
  • 1h 15m total
  • Belfast to Southampton
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 (£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 Belfast Intl to Southampton Eastleigh.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl to Southampton 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 22 January 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Southampton that are best for you.

Fly from

Belfast Intl

Fly to

Southampton

Route

Depart

Return

Price

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 1/5

17:15-07:20

1 stop14h 05m

Southampton Eastleigh

Sun 3/5

12:35-13:50

Nonstop1h 15m

£85

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 15/5

17:15-07:20

1 stop14h 05m

Southampton Eastleigh

Sun 17/5

12:35-13:50

Nonstop1h 15m

£92

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Tue 17/3

17:35-08:50

1 stop15h 15m

Southampton Eastleigh

Thu 19/3

17:55-19:35

1 stop25h 40m

£112

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 11/7

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Mon 13/7

12:25-13:40

Nonstop1h 15m

£118

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 5/6

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Sun 7/6

12:35-13:50

Nonstop1h 15m

£174

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 7/3

07:55-13:10

1 stop5h 15m

Southampton Eastleigh

Sat 14/3

15:25-06:45

2 stops15h 20m

£188

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Tue 17/3

16:30-11:55

2 stops19h 25m

Southampton Eastleigh

Thu 19/3

17:55-21:05

2 stops27h 10m

£193

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 14/2

08:50-08:45

2 stops23h 55m

Southampton Eastleigh

Sat 21/2

17:15-22:00

1 stop4h 45m

£194

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sun 26/4

10:50-12:05

Nonstop1h 15m

£23

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 26/6

10:35-11:50

Nonstop1h 15m

£206

Flights are sorted by cheapest return flights first.

Deals found on 22/1

Best time to book a flight from Belfast Intl to Southampton

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

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

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

To ensure you get the cheapest price possible for a flight from Belfast Intl Airport to Southampton, you should look to book at least 76 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 Belfast Intl Airport to Southampton?

Currently, February is the cheapest month in which you can book a flight from Belfast Intl Airport to Southampton (average of £13). Flying from Belfast Intl Airport to Southampton in July is currently the most expensive (average of £47). 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 SOU?

Find hourly flight availability from Belfast Intl to Southampton. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 January 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 58% on flights from Belfast Intl Airport to Southampton by exploring options for tickets at midday.

Reviews of airlines servicing Southampton

Get insights into the airlines that provide service to Southampton. 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 Southampton. Reviews last updated 22 January 2026.
Read reviews from past customers who have flown with Aer Lingus and easyJet from Belfast Intl Airport to Southampton. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,439 reviews
Check prices

Entertainment

6.9

Food

6.6

Crew

8.0

Comfort

7.1

Overall

7.2

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
1,439 reviews
Aer Lingus
7.2
Good
1,439 reviews
Check prices

Entertainment

6.9

Food

6.6

Crew

8.0

Comfort

7.1

Overall

7.2

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
1,864 reviews
Aer Lingus
7.2
Good
1,439 reviews
Check prices

Entertainment

6.9

Food

6.6

Crew

8.0

Comfort

7.1

Overall

7.2

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 Belfast Intl to Southampton. 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 into for flights to Southampton from Belfast Intl?

    Southampton Eastleigh (SOU) is the airport you will fly into if you book a flight from Belfast Intl to Southampton. You should not have trouble finding flights to Eastleigh from Belfast Intl; the airport handles an average of 0 inbound flights from Belfast Intl per day. You should also have plenty of airline options to choose from since 2 airlines have flights to the Southampton airport from Belfast Intl. It is only a 3.5 mi journey from Eastleigh (SOU) to Southampton’s city center.

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

    Departing from Belfast Intl Airport to Southampton will take you 14h 05m. Belfast Intl Airport and Southampton are separated by a distance of 326 mi.

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

    Currently priced at £25, easyJet will fly you from Belfast Intl Airport to Southampton and back. In addition to easyJet, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Aer Lingus for as low as £74. These flights start at 79% lower than the current average price 3 months from now.

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

    On average you can expect to pay £108 for a flight from Belfast Intl Airport to Southampton. The cheapest flight overall is £48 while the most popular route, (Belfast Intl - Southampton Eastleigh) is currently priced at £85.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Belfast Intl Airport to Southampton (average of £13). Flying from Belfast Intl Airport to Southampton in July is currently the most expensive (average of £47). 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 Intl to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Belfast Intl to Southampton

Discover the top 2 airlines that operate flights from Belfast Intl to Southampton. 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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£25Average£101FlexibilityNo cancel feeOn-time86%
Search easyJet flights
Aer LingusCheapest£74Average£130FlexibilityNo 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 Belfast Intl to Southampton?

When you search for this flight from Belfast Intl to Southampton, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from Belfast Intl to Southampton by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Certainly. Search results for flights to Southampton from Belfast Intl 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 Intl to Southampton become cheaper?

Of course! You can now track prices for flights from Belfast Intl to Southampton 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.

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