BFS - SOU

£23 Find Cheap Flights from Belfast Intl Airport to Southampton

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 Intl to Southampton departing on 29/3. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Southampton

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Belfast to Southampton, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Belfast to Southampton, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
£91
Overall average: £110
easyJet
Thu 15/1Sun 18/1
BFS - SOU • 1 stop
Cheapest one-way flight
£23
Typical prices: £42-£92
easyJet
Sun 29/3
BFS - SOU • Direct
When to travel
March
Cheapest • 39% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Southampton!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Belfast Intl to Southampton (BFS-SOU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Belfast Intl 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 Intl to Southampton

Thu, 15 Jan - Sun, 18 Jan
easyJet Logo
13:35 - 17:20
BFS
-
SOU
3h 45m1 stop
easyJet Logo
18:20 - 20:20
SOU
-
BFS
26h 00m1 stop
£91easyJet
Thu, 5 Feb - Thu, 12 Feb
easyJet Logo
13:35 - 17:20
BFS
-
SOU
3h 45m1 stop
easyJet Logo
17:55 - 19:35
SOU
-
BFS
25h 40m1 stop
£127easyJet
Mon, 30 Mar - Sun, 5 Apr
Multiple Airlines Logo
08:40 - 17:40
BFS
-
SOU
9h 00m1 stop
Multiple Airlines Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£132Multiple Airlines
Thu, 15 Jan - Sun, 18 Jan
easyJet Logo
20:40 - 17:10
BFS
-
SOU
20h 30m2 stops
easyJet Logo
18:20 - 07:45
SOU
-
BFS
13h 25m1 stop
£152easyJet
Thu, 5 Feb - Thu, 12 Feb
Multiple Airlines Logo
13:35 - 17:20
BFS
-
SOU
3h 45m1 stop
Multiple Airlines Logo
20:10 - 10:30
SOU
-
BFS
14h 20m2 stops
£166Multiple Airlines
Thu, 15 Jan - Sun, 18 Jan
easyJet Logo
20:40 - 17:10
BFS
-
SOU
20h 30m2 stops
easyJet Logo
18:20 - 09:45
SOU
-
BFS
15h 25m2 stops
£176easyJet
Thu, 5 Feb - Thu, 12 Feb
Multiple Airlines Logo
06:15 - 19:40
BFS
-
SOU
13h 25m2 stops
Multiple Airlines Logo
20:10 - 10:30
SOU
-
BFS
14h 20m2 stops
£183Multiple Airlines
Tue, 13 Jan - Tue, 20 Jan
Multiple Airlines Logo
06:30 - 17:30
BFS
-
SOU
11h 00m1 stop
Multiple Airlines Logo
15:00 - 20:15
SOU
-
BFS
5h 15m1 stop
£188Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb
Multiple Airlines Logo
19:55 - 17:20
BFS
-
SOU
21h 25m2 stops
Multiple Airlines Logo
16:05 - 09:20
SOU
-
BFS
17h 15m2 stops
£189Multiple Airlines
Tue, 13 Jan - Tue, 20 Jan
Multiple Airlines Logo
06:30 - 17:30
BFS
-
SOU
11h 00m1 stop
Multiple Airlines Logo
12:25 - 08:20
SOU
-
BFS
19h 55m2 stops
£190Multiple Airlines
Booking Insights

KAYAK's insights & trends for Belfast Intl to Southampton flights

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

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

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

When flying from Belfast Intl Airport to Southampton, you should consider leaving on a Wednesday and avoid Fridays if you are looking for the best rates. For your return to Belfast Intl Airport, you’ll find the best rates on Sundays and the most expensive ones on Tuesdays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Belfast Intl Airport 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 Intl Airport to Southampton is March, where tickets cost £74 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £164 and £159 respectively.

How far in advance should I book a flight from Belfast Intl Airport 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 Intl Airport 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 Intl Airport to Southampton, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know - Cheap tickets from Belfast Intl Airport to Southampton

Low seasonMarch
Cheapest flight£23
Best time to beat the crowds (39% less expensive on average)
Most popular time to fly (36% more expensive on average)
Flight from Belfast Intl Airport to Southampton

When to book flights from Belfast Intl to Southampton

Are your dates flexible? Find out the best times to travel from Belfast Intl 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 Belfast Intl Airport to Southampton flights

  • What is the cheapest flight from Belfast Intl Airport to Southampton?

    In the last 3 days, the lowest price for a flight from Belfast Intl Airport to Southampton was £23 for a one-way ticket and £91 for a return.

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

    On your way to Southampton, you’ll fly out from Belfast Intl. You’ll be landing at Southampton Eastleigh.

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

    The ATR 72-201 / 202 is the aircraft model that flies most regularly on the Belfast Intl Airport to Southampton flight route.

  • Which is the best airline for flights from Belfast to Southampton, Aer Lingus or easyJet?

    The two airlines most popular with KAYAK users for flights from Belfast to Southampton are Aer Lingus and easyJet. With an average price for the route of £132 and an overall rating of 7.2, Aer Lingus is the most popular choice. easyJet is also a great choice for the route, with an average price of £112 and an overall rating of 6.9.

  • How does KAYAK find such low prices on flights from Belfast Intl Airport 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 Intl Airport to Southampton.

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

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

  • What is the Hacker Fare option on flights from Belfast Intl Airport 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 Intl Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Belfast Intl Airport 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 Intl Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Belfast Intl Airport to Southampton

  • Looking for a cheap flight from Southampton to Belfast Intl Airport? 25% of our users found flights on this route for Southampton or less round-trip.

Reviews of the top airlines flying from Belfast Intl 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 Intl 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.
7.2
Aer LingusOverall score based on 1412 reviews
7.4Boarding
8.0Crew
7.1Comfort
6.6Food
6.9Entertainment
Airline reviews

Seats a little to soft on the SFO DUB flight

8.0 ExcellentDavid, Dec 2025
SFO - DUB
Read more Aer Lingus reviews

Seats a little to soft on the SFO DUB flight

This is a bit of a rant, but I'll try to keep it civil. The flight was delayed for 2 hours with almost ZERO updates from agents. Just "there's technical issues, we don't know if or when it'll be resolved" once an hour maybe? And the gate signs, and app never updated to show the delay until it was finally resolved. So when I called Aer Lingus to see if I could rebook, I had literally the dumbest conversation with the person on the phone there where he says "It's showing your flight departed at 11:10. So it's already departed!", where I responded, "Well, it's 12:45 and I'm on the phone with you, standing in the airport, staring at the plane. So...I'm not sure what your system is saying, but we aren't in the air right now.". He said "Nothing I can do. Since it doesn't show delayed in my system, you would be charged to reschedule." Once we finally departed 2 hours late, things were going smoothly as I would expect, except in another very strange way. The stewardesses were rolling the cart down the aisle offering drinks and I asked for a water, to which they said "Sure, you can buy a bottle". I'm not sure if this is an Aer Lingus thing. Maybe something I'd expect from Ryan Air, but for a 3 hour international flight, to not have complimentary water available for customers is an absolute first, in 15 years of flying for me. I'm not upset with the plane staff at all. They were very friendly, but Aer Lingus' policies, how they handled the delay, and the unbelievable conversation with the customer service representative, leaves a lot to be desired in those areas. Also, I'm not upset about the delay. Things happen. Technical issues. But this is a place where airlines really need to clearly communicate with their customers. They also changed gates from 12N to 13N and there was no notification on any app, or announcement over the PA. End of rant. I hope they get some feedback on how to improve communication, because otherwise, they were great. And the second leg of my trip was incredibly smooth - no nickle and diming water, no communication issues. Very professional and efficient and even landed early

Seats are small, but comfortable and more space around you, so for a normal person the seats are perfect. If you are a big and fat individual, I would not think the seats are comfortable. All else was good and normal. Lots of movies to watch.

The biking process was confusing and I was called for a seat assignment from I number I repeatedly though was spam, but the flight itself was great

My experience with Aer Lingus was not too good. First, because of the last minute delayed flight from Amsterdam to Dublin we almost missed our flight from Dublin to Philadelphia. Secondly, the flight from Dublin to Philadelphia had very uncomfortable seats especially it was a very long flight. My buttocks were constantly in pain for sitting on these seats for this long. Lastly, the service in the plane was also slow. I asked for a second cup of water and the hostess told me he'll be right back with that where it took him over an hour to come back with water. It was warm in the plane and I was very thirsty. Overall this airline needs much improvement in their services.

I think the extra charges for seating with no added advantage and the added charges for baggage are excessive compared to other airlines.

I had zero issues with the flight. I did have issues with the staff at the airport. We missed out flight due to a delay with another airline. Talking to the staff and trying to get a new flight arranged was challenging. One guy was able to try to help us and got us on a new flight, but other staff was dismissive and clearly let us know it wasn’t their problem. All I kept thinking was… this is why air lingus has such a poor customer service reputation. I will be avoiding this airline in the future.

Experience was great overall. However, the connection time between my flights (1hr 15 mins) was too short. We had to get through security check and US immigration in that time, and I made it to the gate just as they were announcing it was about to close. Flights with such a short connection time should maybe not be offered for purchase, or an advance alert would be helpful. Other than that the in-flight experience was excellent, especially the food. Many thanks!

I liked that I went thru customs in Dublin instead of having to do that in LA.

The actual flight experience was great. The handling of my luggage was terrible. First, I had to check in at the airport and wasn’t able to check in online because they booked me with a partner carrier in the U.S. that was incredibly inconvenient. I was also told that I would have to check in again with the partner airline in the U.S., also incredibly inconvenient at a large airport. Second, when I was at the counter, they did not tell me my carryon was too big. I only found that out when I tried to board the plane. I don’t know that it actually was too big though. It’s a standard sized carry on that I’ve never had issue with on any planes before. They assured me my bag would be checked all the way to my final destination. Due to flight from Paris to Dublin being delayed, I was rebooked on a different transatlantic flight to the U.S., which resulted in a different connecting flight to my final destination. My luggage was rerouted and I was assured it would be at my final destination. When I got to Newark, I received multiple phone calls alerting me that my bag was across the airport at a different terminal and that I needed to go pick it up near the baggage carousels. In the Newark airport, every terminal has its own security checkpoint. Leaving any terminal and entering another one requires a security check. At this point, I had to go through security in Paris, then again for US customs and pre-clearance at Dublin, then a third time when I had to change terminals at Newark for my connecting flight home. It was at this point I received the call that I needed to retrieve my bag from literally the opposite end of the airport and go through security A FOURTH TIME. These was no notification that I needed to do this before I went to the gate for my final flight. It took me an hour to go do all this, after I had already been traveling for 19 hours while sick and should have been home already were it not for the delay of my original flight. I retrieved the bag. My carryon became a carryon again and fit just fine on the last plane, by the way. I would also like to mention that my TSA flight information was not included on my ticket, so once again, I had to go to the airline counter to get my ticket corrected and reprinted before I could go through security and try to save myself time. Finally, I have celiac disease and prefer not to eat meat. There was literally no food I could eat on the seven and a half hour flight across the Atlantic. When the flight attendant woke me up for dinner (I would have preferred to sleep), I asked if there were any gluten free options. I was told the only option was chicken. I begrudgingly accepted because it was the only option, hoping anything else in the meal could be eaten. There was plain rice and a few green beans. The side dish was teriyaki vegetables containing gluten. There was a piece of bread, containing gluten. There was a custard, containing gluten. I could eat literally nothing except the very small amount of rice and green beans. When the same flight attendant came around again, while I was sleeping, a sandwich was placed in front of me, again food I could not eat. And this was after I got to the flight to find that my newly assigned seat on my transatlantic flight had been given to someone else! It’s like nobody communicates over there. This airline has the worst logistics of any airline I have ever been on, and I travel frequently. Dear Aer Lingus, DO BETTER.

Would not advise EasyJet for a 5 hour flight…small plane and hence a lot of turbulence. No inflight entertainment so struggle to pass time in cramped seats. We also fell victim to extra charge for our cabin bags, although bag dimensions were ok, but the handle was rigid and slightly fell outside their testing cage!!….never again will we fly with this airline and be party to their scams for making money!

The food and so are to expensive and old . Crew whas not very friendly . Apparently some other passenger can just Push through the waiting people to board while almost punching me and a father with a child down the stairs. Its always something with easy jet . The seats of row 26 where lose . And for a guy of my size there is absolutely no leg room at all .

Nice to fly out of Orly smaller easier to navigate airport. Being able to receive boarding pass well in advance of trip was comforting to know all travel was in order.

Liked. The check-in was pretty quick as they had 5 desks working.

Generally a good experience except for boarding in Naples on the flight back to London. We were all standing around for at least 20 minutes maybe longer as there was no seating.

Seats, WC,sizes for today's generation adults, and if technical problems arise a complimentary coffee, water nice for waiting one hours, the rest is perfect (pilot and cabin crew)

Boarding was smooth and quick. Flight departed on time. Equally evacuation upon landing was from both the front door and the back doors. Bags were on the conveyor belts before I got there. Excellent service.

The terminals are far away, be prepared to walk. Also, You climb stairs to the plane since there are no aero bridges. Boarding was haphazard not in multiple groups, so stand in line early. Hard to find place to stow cabin baggage if you are behind in the line. You can purchase food on the plane. There are vegetarian options.

First -the flight was late - more than two hours Second, not even a bottle of water at bord to give for free for this inconvenience. Three-at landing ive realised that I've lost one of my ear plug headphones and been very desperate to find it with my torch, the crew not helped at all more than that they asked to leave the plane as everyone did before me. This was the last flight from that day- extra 5 min for me with a bit of help from crew - would have bring a super review. I guess this days humanity disappeared!

I got caught using a stolen credit card number. Michelle Siziba is my name Nice to London Gatwick on 7/31/25.

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

Information on your arrival and departure airports