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Cheap flights from Northern Ireland to Southampton from £20

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 27/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SOU
7 Sep — 14 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Northern Ireland to Southampton

Enter your travel dates to find the best prices.

Cheapest flights from Northern Ireland to Southampton
Explore the most affordable flight options available from Northern Ireland to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 August 2026.

Sun 27/910:50 -
Nonstop1h 15m
Mon 28/912:25 -
Nonstop1h 15m
Deal found 7/8£45
Sun 13/910:50 -
Nonstop1h 15m
Sun 27/912:35 -
Nonstop1h 15m
Deal found 3/8£50
Sun 20/910:50 -
Nonstop1h 15m
Mon 28/912:25 -
Nonstop1h 15m
Deal found 5/8£50
Sat 26/910:30 -
Nonstop1h 15m
Sun 27/912:35 -
Nonstop1h 15m
Deal found 7/8£60
Sat 26/910:30 -
Nonstop1h 15m
Mon 28/912:25 -
Nonstop1h 15m
Deal found 3/8£62
Sat 19/910:30 -
Nonstop1h 15m
Mon 21/912:25 -
Nonstop1h 15m
Deal found 5/8£68
Mon 21/910:25 -
Nonstop1h 40m
Mon 28/908:55 -
Nonstop1h 40m
Deal found 7/8£73
Thu 24/906:40 -
Nonstop1h 45m
Thu 24/919:30 -
Nonstop1h 35m
Deal found 7/8£78
Sat 26/910:25 -
Nonstop1h 40m
Sun 27/912:35 -
Nonstop1h 35m
Deal found 5/8£79
Sat 24/1014:40 -
Nonstop1h 35m
Sat 31/1008:55 -
Nonstop1h 40m
Deal found 4/8£81
Thu 15/1017:40 -
1 stop20h 15m
Mon 19/1012:25 -
Nonstop1h 15m
Deal found 4/8£82
Tue 1/906:40 -
Nonstop1h 45m
Tue 8/908:55 -
Nonstop1h 40m
Deal found 4/8£85

Find flight deals from Northern Ireland to Southampton

Keep the following information in mind while searching for Northern Ireland to Southampton flight deals. Data was last updated 8 August 2026.

Round-trip from

£45

One-way from

£20

Popular in

July

Cheapest in

November

Average price

£98

Good round-trip deal

£85 or less

Good one-way deal

£45 or less
easyJet
  • easyJet
  • 27/9-28/9
  • Nonstop
  • 2h 30m total
  • Northern Ireland to Southampton
Search Deals
easyJet
  • easyJet
  • 27/9
  • Nonstop
  • 1h 15m total
  • Northern Ireland to Southampton
Search Deals
Highest demand for flights based on searches. 29% potential increase in price (£20 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Northern Ireland to Southampton Eastleigh.
Search Deals
Price to beat on a one-way flight from Northern Ireland to Southampton Eastleigh.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Northern Ireland 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 8 August 2026.
Use the filters below to find and compare flights from Northern Ireland to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sun 13/9

10:50-12:05

Nonstop1h 15m

Southampton Eastleigh

Sun 27/9

12:35-13:50

Nonstop1h 15m

£50

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sat 26/9

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Sun 27/9

12:35-13:50

Nonstop1h 15m

£63

BelfastSouthampton

BHD Belfast City - SOU Southampton Eastleigh

BHDSOU

Belfast City

Sat 24/10

14:40-16:15

Nonstop1h 35m

Southampton Eastleigh

Sat 31/10

08:55-10:35

Nonstop1h 40m

£81

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Thu 15/10

17:40-13:55

1 stop20h 15m

Southampton Eastleigh

Mon 19/10

12:25-13:40

Nonstop1h 15m

£82

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sun 6/9

10:50-12:05

Nonstop1h 15m

Southampton Eastleigh

Sat 12/9

12:15-13:30

Nonstop1h 15m

£91

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sun 27/9

10:50-12:05

Nonstop1h 15m

Southampton Eastleigh

Mon 28/9

12:55-21:00

1 stop8h 05m

£106

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Mon 7/9

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Tue 8/9

13:25-20:40

1 stop7h 15m

£111

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Mon 21/9

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Fri 25/9

12:20-13:35

Nonstop1h 15m

£111

BelfastSouthampton

BHD Belfast City - SOU Southampton Eastleigh

BHDSOU

Belfast City

Mon 24/8

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Fri 28/8

10:20-21:05

1 stop10h 45m

£186

BelfastSouthampton

BHD Belfast City - SOU Southampton Eastleigh

BHDSOU

Belfast City

Tue 6/10

11:05-19:30

2 stops8h 25m

Southampton Eastleigh

Thu 15/10

06:45-17:10

1 stop10h 25m

£215

Flights are sorted by cheapest return flights first.

Deals found on 5/8

Showing 1-10 of 40 resultsSorted by cheapest first
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Best time to book a flight from Northern Ireland to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Northern Ireland 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 Northern Ireland to Southampton

What is the cheapest month to book a flight from Northern Ireland to Southampton?

Currently, March is the cheapest month in which you can book a flight from Northern Ireland to Southampton (average of £102). Flying from Northern Ireland to Southampton in July is currently the most expensive (average of £189). 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 NIR to SOU?

Find hourly flight availability from Northern Ireland 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 8 August 2026.

It’s typically best to fly out from Northern Ireland to Southampton in the morning. Doing so could potentially save you 39% on the flight price compared to flying in the evening, which is usually more expensive.

How much does it cost for a return flight from Northern Ireland to Southampton?

Airfare is below average for this route at the moment.
Northern Ireland to Southampton flights typically cost between £96 and £157 in September.
The cheapest return price found within the last 5 days was £45 on easyJet (27 Sept–28 Sept).

How far ahead should I book a flight from Northern Ireland to Southampton?

The best time to book flights from Northern Ireland to Southampton is 46 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland 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 Northern Ireland?

    Southampton Eastleigh (SOU), located 3.5 mi from the city center, is the airport you fly into when you book flights from Northern Ireland to Southampton.

  • How long is the flight from Northern Ireland to Southampton?

    Departing from Northern Ireland to Southampton will take you 1h 15m. The distance from Northern Ireland to Southampton is about 326 mi. All flights are typically direct.

  • What are the cheapest flights from Northern Ireland to Southampton?

    The cheapest flight price from Northern Ireland to Southampton is £61. On average you can expect to pay £136. The most popular route, (Belfast Intl - Southampton Eastleigh), can usually be booked for £45.

  • Can I find deals for flights from Northern Ireland to Southampton that include hotel bookings?

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

  • How can I find direct flights from Northern Ireland to Southampton?

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

  • Can I find deals for business class flights from Northern Ireland to Southampton?

    Yes. Cheapflights offers flight deals from Northern Ireland 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 Northern Ireland to Southampton?

    Currently, March is the cheapest month in which you can book a flight from Northern Ireland to Southampton (average of £102). Flying from Northern Ireland to Southampton in July is currently the most expensive (average of £189). 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 Northern Ireland 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 Northern Ireland to Southampton

Discover the top 2 airlines that operate flights from Northern Ireland 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 8 August 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£40Average£107FlexibilityNo cancel feeOn-time86%
Search easyJet flights
Aer LingusCheapest£84Average£140FlexibilityNo 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 Northern Ireland to Southampton?

Deals for Northern Ireland to Southampton 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 Northern Ireland to Southampton?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Northern Ireland to Southampton.

Can Cheapflights find flights from Northern Ireland to Southampton with no change fees?

Need flexible booking options for your flight to Southampton from Northern Ireland? 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 Northern Ireland to Southampton 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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