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Cheap flights from Belfast to Southampton from £20

BHD — SOU
10 Dec — 17 Dec1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Belfast to Southampton Eastleigh are usually found in March or October, booked 46 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Belfast to Southampton

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to Southampton

Sat 21/1106:40 -
Nonstop1h 40m
Mon 23/1119:40 -
Nonstop1h 35m
Deal found 9/11£79
Thu 10/1221:05 -
1 stop15h 50m
Thu 17/1213:55 -
1 stop8h 25m
Deal found 9/11£82
Thu 31/1221:05 -
1 stop15h 50m
Thu 7/113:50 -
1 stop8h 30m
Deal found 9/11£91
Sat 14/1106:40 -
Nonstop1h 40m
Mon 16/1119:40 -
Nonstop1h 35m
Deal found 5/11£93
Sat 28/1106:40 -
Nonstop1h 40m
Mon 30/1119:40 -
Nonstop1h 35m
Deal found 10/11£94
Wed 23/1207:40 -
1 stop6h 45m
Wed 30/1215:05 -
1 stop5h 50m
Deal found 8/11£99
Thu 10/1214:05 -
Nonstop1h 35m
Thu 17/1216:10 -
Nonstop1h 35m
Deal found 9/11£119
Sat 12/1210:25 -
Nonstop1h 40m
Mon 14/1216:10 -
Nonstop1h 35m
Deal found 7/11£119
Thu 3/1221:05 -
1 stop15h 50m
Mon 7/1215:30 -
1 stop4h 45m
Deal found 7/11£121
Thu 31/1216:00 -
1 stop20h 55m
Thu 7/112:35 -
Nonstop1h 35m
Deal found 9/11£121
Wed 23/1208:20 -
1 stop6h 05m
Mon 28/1212:20 -
1 stop19h 40m
Deal found 9/11£122
Thu 3/1221:05 -
1 stop15h 50m
Sat 5/1208:20 -
1 stop13h 35m
Deal found 8/11£126

Find flight deals from Belfast to Southampton

Round-trip from

£79

One-way from

£20

Popular in

January

Cheapest in

March

Average price

£112
Aer Lingus
  • Aer Lingus
  • 21/11-23/11
  • Nonstop
  • 3h 15m total
  • Belfast to Southampton
Search Deals
easyJet
  • easyJet
  • 5/2-31/12
  • Nonstop
  • 1h 10m total
  • Belfast to Southampton
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£26 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Belfast 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

Fri 5/2

16:55-18:05

Nonstop1h 10m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£20

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Tue 8/12

21:05-08:45

1 stop11h 40m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£38

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Tue 1/12

21:05-08:45

1 stop11h 40m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£40

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Wed 16/12

08:15-08:40

1 stop24h 25m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£43

BelfastSouthampton

BHD Belfast City - SOU Southampton Eastleigh

BHDSOU

Belfast City

Sat 13/2

10:25-12:05

Nonstop1h 40m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£49

BelfastSouthampton

BHD Belfast City - SOU Southampton Eastleigh

BHDSOU

Belfast City

Sat 13/2

18:15-15:35

1 stop21h 20m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£50

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Fri 4/12

20:45-07:45

1 stop11h 00m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£62

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Wed 25/11

18:55-08:40

1 stop13h 45m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£62

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Fri 5/2

08:25-12:00

1 stop3h 35m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£63

BelfastSouthampton

BHD Belfast City - SOU Southampton Eastleigh

BHDSOU

Belfast City

Mon 23/11

15:30-11:45

1 stop20h 15m

Southampton Eastleigh

Wed 31/12

00:00-00:00

Nonstop0h 00m

£65

Flights are sorted by cheapest return flights first.

Deals found on 9/11

Showing 1-10 of 41 resultsSorted by cheapest first
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Best time to book a flight from Belfast to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Belfast with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Belfast to Southampton

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

Currently, March is the cheapest month in which you can book a flight from Belfast to Southampton (average of £101). Flying from Belfast to Southampton in July is currently the most expensive (average of £178). 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?

Unlike in the evening, when flights are generally more expensive, you can save up to 49% on flights from Belfast to Southampton by exploring options for tickets at midday.

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

Airfare is below average for this route at the moment.
Belfast to Southampton flights typically cost between £103 and £227 in November.
The cheapest return price found within the last 5 days was £79 on Aer Lingus (21 Nov–23 Nov).

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

Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from Belfast to Southampton. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Southampton

Read through reviews of airlines operating flights from Belfast to Southampton, 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
7.3
Good
1,881 reviews
Check prices

Crew

8.1

Boarding

7.5

Comfort

7.2

Food

6.7

Overall

7.3

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Aer Lingus
7.3
Good
1,881 reviews
Aer Lingus
7.3
Good
1,881 reviews
Check prices

Crew

8.1

Boarding

7.5

Comfort

7.2

Food

6.7

Overall

7.3

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
easyJet
6.9
Okay
1,916 reviews
Aer Lingus
7.3
Good
1,881 reviews
Check prices

Crew

8.1

Boarding

7.5

Comfort

7.2

Food

6.7

Overall

7.3

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Related info for your journey

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

    Southampton Eastleigh (SOU), located 3.5 mi from the city center, is the airport you fly into when you book flights from Belfast to Southampton. 2 airlines have flights to Eastleigh from Belfast on a regular basis. Booking flights from Belfast to Southampton Eastleigh should not be difficult; the airport handles an average of 0 inbound flights from Belfast per day.

  • How long is the flight from Belfast to Southampton?

    A quick flight from Belfast to Southampton can take about 1h 40m. easyJet provides one of the quickest options available for as low as £94. There are 316 mi between Belfast and Southampton. This flight may include one or multiple stops.

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

    Currently priced at £49, easyJet will fly you from Belfast 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 £79. easyJet is priced at 61% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest flights from Belfast to Southampton?

    While on average a flight from Belfast to Southampton is generally £43, our data shows the cheapest flight currently is £27. When looking at the most popular route, (Belfast Intl - Southampton Eastleigh), you can expect to pay £79 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast 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 to Southampton?

    Currently, March is the cheapest month in which you can book a flight from Belfast to Southampton (average of £101). Flying from Belfast to Southampton in July is currently the most expensive (average of £178). 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

Top 2 airlines flying from Belfast to Southampton

AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£49Average£99FlexibilityNo cancel feeOn-time86%
Search easyJet flights
Aer LingusCheapest£79Average£136FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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