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Cheap flights from Belfast to Southampton

BHD — SOU
29 Oct — 5 Nov1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Belfast to Southampton Eastleigh are usually found in March or April, booked 46 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

Find flight deals from Belfast to Southampton

Popular in

January

Cheapest in

March

Average price

£121
Highest demand for flights based on searches. 17% potential increase in price (£21 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£6 potential savings vs. average return price).
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Average for round-trip flights in September 2026
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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

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

Booking 86 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.

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 £103). Flying from Belfast 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 BFS to SOU?

Unlike in the evening, when flights are generally more expensive, you can save up to 39% on flights from Belfast to Southampton by exploring options for tickets in the morning.

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
1,794 reviews
Check prices

Boarding

7.4

Overall

7.3

Entertainment

7.0

Comfort

7.2

Crew

8.1

Food

6.7

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
1,794 reviews
Aer Lingus
7.3
Good
1,794 reviews
Check prices

Boarding

7.4

Overall

7.3

Entertainment

7.0

Comfort

7.2

Crew

8.1

Food

6.7

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
1,926 reviews
Aer Lingus
7.3
Good
1,794 reviews
Check prices

Boarding

7.4

Overall

7.3

Entertainment

7.0

Comfort

7.2

Crew

8.1

Food

6.7

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.

  • 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 £83. easyJet is priced at 63% 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 £132, our data shows the cheapest flight currently is £46. When looking at the most popular route, (Belfast Intl - Southampton Eastleigh), you can expect to pay £60 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 £103). Flying from Belfast 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

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Belfast to Southampton

AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£49Average£106FlexibilityNo cancel feeOn-time86%
Search easyJet flights
Aer LingusCheapest£83Average£140FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Southampton from Belfast today and book when prices fit your budget.

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