SOU

£20 Find Cheap Flights from Belfast to Southampton – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Belfast to Southampton departing on 28/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
£43
Typical prices: £78-£144
easyJet
Sun 13/9Sat 19/9
BFS - SOU • Direct
Cheapest one-way flight
£20
Typical prices: £46-£52
easyJet
Mon 28/9
BFS - SOU • Direct
Top airlines
Cheapest • from £43 (return)
Best reviews • 7.3 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with Aer Lingus and easyJet. Average duration is 1h 35m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top routes
Cheapest • 39% average savings
Most popular
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
Insights
Insights
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Southampton!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Belfast to Southampton

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Belfast to Southampton that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Belfast to Southampton

Sun, 13 Sep - Sat, 19 Sep
easyJet Logo
10:50 - 12:05
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:15 - 13:30
SOU
-
BFS
1h 15mdirect
£43easyJet
Sun, 13 Sep - Sat, 19 Sep
easyJet Logo
10:50 - 12:05
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:15 - 13:30
SOU
-
BFS
1h 15mdirect
£44easyJet
Sun, 13 Sep - Sat, 19 Sep
easyJet Logo
10:50 - 12:05
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:15 - 13:30
SOU
-
BFS
1h 15mdirect
£46easyJet
Sat, 12 Sep - Sun, 13 Sep
easyJet Logo
10:30 - 11:45
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£53easyJet
Sat, 12 Sep - Sun, 13 Sep
easyJet Logo
10:30 - 11:45
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£57easyJet
Sat, 12 Sep - Sun, 13 Sep
easyJet Logo
10:30 - 11:45
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£58easyJet
Sat, 12 Sep - Sun, 13 Sep
easyJet Logo
10:30 - 11:45
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£58easyJet
Sat, 12 Sep - Sun, 13 Sep
easyJet Logo
10:30 - 11:45
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£59easyJet
Sun, 9 Aug - Sat, 22 Aug
Aer Lingus Logo
06:40 - 08:25
BHD
-
SOU
1h 45mdirect
Aer Lingus Logo
19:40 - 21:15
SOU
-
BHD
1h 35mdirect
£78Aer Lingus
Sat, 15 Aug - Sat, 22 Aug
Aer Lingus Logo
10:25 - 12:05
BHD
-
SOU
1h 40mdirect
Aer Lingus Logo
19:40 - 21:15
SOU
-
BHD
1h 35mdirect
£85Aer Lingus
Booking Insights

KAYAK’s insights & trends for Belfast to Southampton flights

Get data-powered insights and trends into flights from Belfast to Southampton to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from Belfast to Southampton?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Belfast to Southampton departing in September.

Flight prices are below average for this route right now.

Flights to Southampton from Belfast usually cost between £100 and £196 in September.
The lowest price found in the past 5 days was £43 on easyJet (13 Sept–19 Sept).

What is the cheapest Belfast to Southampton flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Belfast to Southampton costs £33 on the route between Belfast Intl Airport (BFS) and Southampton (SOU). Over the past month, this route was, on average, 39% cheaper than other Belfast-Southampton routes. The most popular route is between Belfast City Airport (BHD) and Southampton (SOU).

What’s the cheapest day of the week to fly from Belfast to Southampton?

The average price of all round-trip flights from Belfast to Southampton clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Southampton on a Monday and more expensive on a Friday. On your return trip to Belfast, you should consider flying back on a Saturday, and avoid Wednesdays for better deals.

What is the cheapest month to fly from Belfast to Southampton?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Belfast to Southampton, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Belfast to Southampton is March, where tickets cost £102 (return) on average. On the other hand, the most expensive months are July and January, where the average cost of round-trip tickets is £182 and £151 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Belfast to Southampton, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Belfast to Southampton, you should book around 2 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Expert advice

Expert advice for your flight from Belfast to Southampton

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Aer Lingus

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialising in airline interiors and regulations. 10 years ago, she pivoted to journalism. She shares her insights in leading aviation, travel and business publications and on her site, FlightChic.

Blane Bachelor

Blane Bachelor

Expert on easyJet

Blane Bachelor is a journalist and editor specialising in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favourite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history.

Good to know - Cheap tickets from Belfast to Southampton

Cheapest flight

£20
Flight from Belfast Intl Airport to Southampton

When to book flights from Belfast to Southampton

Are your dates flexible? Find out the best times to travel from Belfast to Southampton based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Belfast to Southampton

  • What is the cheapest flight from Belfast to Southampton?

    In the last 5 days, the lowest price for a flight from Belfast to Southampton was £20 for a one-way ticket and £43 for a return.

  • Which airports will I be using when flying from Belfast to Southampton?

    Belfast has 2 major airports: Belfast Intl and Belfast City. Southampton Eastleigh is the only airport in Southampton. You’ll usually find the cheapest deals if you fly from Belfast Intl Airport.

  • Which aircraft models fly most regularly from Belfast to Southampton?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Belfast to Southampton?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Belfast to Southampton.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Belfast to Southampton?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Southampton from Belfast is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Belfast to Southampton?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Southampton with an airline and back to Belfast with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Belfast to Southampton?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Southampton from Belfast up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from Belfast to Southampton?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Belfast to Southampton Eastleigh.
Find which airlines fly direct from Belfast to Southampton Eastleigh Airport, which days they fly and book direct flights.

Direct departures

Belfast to Southampton Eastleigh

Monday

Aer Lingus,easyJet

Aer Lingus,easyJet

Tuesday

Aer Lingus

Aer Lingus

Wednesday

Aer Lingus

Aer Lingus

Thursday

Aer Lingus

Aer Lingus

Friday

Aer Lingus,easyJet

Aer Lingus,easyJet

Saturday

Aer Lingus,easyJet

Aer Lingus,easyJet

Sunday

Aer Lingus,easyJet

Aer Lingus,easyJet

See more direct flights

Direct returns

Southampton Eastleigh to Belfast

Monday

Aer Lingus,easyJet

Aer Lingus,easyJet

Tuesday

Aer Lingus

Aer Lingus

Wednesday

Aer Lingus

Aer Lingus

Thursday

Aer Lingus

Aer Lingus

Friday

Aer Lingus,easyJet

Aer Lingus,easyJet

Saturday

Aer Lingus,easyJet

Aer Lingus,easyJet

Sunday

Aer Lingus,easyJet

Aer Lingus,easyJet

See more direct flights

Reviews of the top airlines flying from Belfast to Southampton

 
See real verified KAYAK customer reviews for airlines flying from Belfast to Southampton. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Belfast to Southampton? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
Aer LingusOverall score based on 1678 reviews
7.2Comfort
7.4Boarding
8.1Crew
7.0Entertainment
6.6Food
Airline reviews

Air Lingus was in no hurry to get us on the plane as sat at the gate a long time before they boarded us. Then they leave us on the tarmac for an hour. They were no help to let me know what I needed to do to get home. I had to navigate London Heathrow with 0 help from them.

2.0 MediocreGeorge Craig, Jul 2026
DUB - LHR
Read more Aer Lingus reviews

Air Lingus was in no hurry to get us on the plane as sat at the gate a long time before they boarded us. Then they leave us on the tarmac for an hour. They were no help to let me know what I needed to do to get home. I had to navigate London Heathrow with 0 help from them.

There was a 6h delay with limited updates . When we got to Manchester the bus took ages to get to arrivals and we missed our train, dinner reservation. Basically lost a whole day due to arrivals Lingus!!

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

My flights with Aer Lingus were very good and I will definitely fly with them. Again in future trips to Ireland and Scotland.

At check-in the unmanned machines said QR code was invalid so had to queue for over an hour to check in bags

Friendly crew who apologised and explained reason for delay. Good on board service. Rather cramped seating. Late departure.

Amenity kits were never handed out. There was zero friendliness and assistance by crew. Food was uneatable. One drink was offered and no wine, with dinner or before or after. Cocktails and beverages were not encouraged and when I asked for water, none was given. Poorest, most cramped business class flight I’ve ever been on.

I fly to the USA every 6wks on Ave and 99% of the time I fly Aer Lingus. If I fly BA I’m always disappointed. My only criticism is the food. I’m vegan and over the last year it’s got slightly better these last couple of flights but on the whole it’s not good! Salad and fruit salad for breakfast and that’s also the starter and desert for the lunch/dinner and the main is usually rice with fried veg 😳the pasta is pretty good though. That’s been the last 2 meals…. Everything else is fantastic.

The flight was half full and I presume that the next few days are even less busy not sure why they are still charging a premium to change a flight.

Short flight so not much to rate. Surprised I had to pay for a soda.

The workers checking passengers from the boarding gate stole money from people whose luggage was perfectly fitting inside the carry-on sizer.

Whole way through - far more professional and slick than I expected

Good news was that Bag Check was open two and a half hours before the flight, which is essential with the chaotic immigration process. Flight was okay, but sitting at the back of the aircraft, 3 overhead bins on both sides were filled with crew bags and other misc items, so we couldn't put our cabin bags anywhere near us. To add insult, twice the crew managed to drop items that they were taking out of the overhead bins onto my wife's head, who was sitting in an aisle seat.

You need to make signage at Berlin Airport clearer. Having checked in online we had our boarding passes onlour phones. You do not make it clear that you need to check in again to receive a printed luggage tag. You get to baggage drop off and it says you can only do it with a luggage tag BUT not how to get this.

It was good except they could offer free water and tea/coffe

Sat at rear of aircraft and was very cold. As a frequent flyer for many years, this is was the coldest I have ever been. Other passengers and some crew were complaining how cold it was. Sitting near the doors always risks being colder, just the way the aircraft works - but this was exceptional, bring a good jumper. Everything else was pretty standard easyJet - good value low cost carrier.

The plane was postponed for over 2.5 hours, which meant that all four of us missed the check in time for our ongoing trip to Melbourne. We had to buy new tickets for 4 people as we had to forfeit the ones we had. The cost was really unfair. i understand that it was snowing during the first leg of the plane for that morning. Surely the cost could have been shared by the airline and not all by us. I could have bought insurance - but you can see how much I travel. I will need to chose more trustworthy airlines.

The true is that travel from London to Faro on 11/12/2025 by BA was cancelled, so I did not go to Faro, so i did not board easy flight. The mediocre qualification to you was because even when i bought an insurance, i could not change date neither obtain reimbursement. It could be ideal if you do something in order for me not to lose the purchase Thank you

Queuing for quite a while despite using the "speedy boarding".

Not great! Rude staff in London and the worse baggage reclaim I’ve ever seen. Great staff in flight but doubt I’ll fly with them again

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

Information on your arrival and departure airports