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Cheap flights from Belfast Intl Airport to London from £25

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Belfast Intl Airport to London departing on 14/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Belfast Intl Airport to London

Cheap return flights

Enter your travel dates to find the best prices.
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£43easyJet
Mon, 14 Sep - Sun, 27 Sep
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:15 - 13:30
SOU
-
BFS
1h 15mdirect
£44easyJet
Mon, 14 Sep - Sat, 19 Sep
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:15 - 13:30
SOU
-
BFS
1h 15mdirect
£45easyJet
Mon, 14 Sep - Sat, 19 Sep
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£45easyJet
Mon, 14 Sep - Sun, 27 Sep
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:15 - 13:30
SOU
-
BFS
1h 15mdirect
£47easyJet
Mon, 14 Sep - Sat, 19 Sep
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:15 - 13:30
SOU
-
BFS
1h 15mdirect
£49easyJet
Mon, 14 Sep - Sat, 19 Sep
easyJet Logo
10:35 - 11:50
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:15 - 13:30
SOU
-
BFS
1h 15mdirect
£50easyJet
Mon, 14 Sep - Sat, 19 Sep
easyJet Logo
10:50 - 12:05
BFS
-
SOU
1h 15mdirect
easyJet Logo
12:25 - 13:40
SOU
-
BFS
1h 15mdirect
£62easyJet
Sun, 13 Sep - Mon, 14 Sep
Multiple Airlines Logo
10:30 - 11:45
BFS
-
SOU
1h 15mdirect
Multiple Airlines Logo
08:20 - 10:05
SOU
-
BFS
25h 45m
2 stops
£102Multiple Airlines
Sat, 24 Oct - Sat, 31 Oct
Multiple Airlines Logo
19:35 - 12:50
BFS
-
SOU
17h 15m
2 stops
Multiple Airlines Logo
12:35 - 13:50
SOU
-
BFS
1h 15mdirect
£117Multiple Airlines
Mon, 14 Sep - Sun, 27 Sep

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easyJet flights from Belfast Intl Airport to Southampton

Our best easyJet deals on Belfast Intl Airport to Southampton flight tickets
easyJet
14 Sept
BFS10:35Belfast Intl
1h 15m
SOU11:50Southampton Eastleigh
27 Sept
SOU12:35Southampton Eastleigh
1h 15m
BFS13:50Belfast Intl
£43
easyJet
14 Sept
BFS10:35Belfast Intl
1h 15m
SOU11:50Southampton Eastleigh
19 Sept
SOU12:15Southampton Eastleigh
1h 15m
BFS13:30Belfast Intl
£44
easyJet
13 Sept
BFS10:50Belfast Intl
1h 15m
SOU12:05Southampton Eastleigh
19 Sept
SOU12:15Southampton Eastleigh
1h 15m
BFS13:30Belfast Intl
£44

momondo Fare Finder

 
Customise your flight search to find flights from Belfast Intl Airport 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, momondo users made 279,928 searches. Data last updated 29 July 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 14/9

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Sun 27/9

12:35-13:50

Nonstop1h 15m

£43

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 14/9

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Sat 19/9

12:15-13:30

Nonstop1h 15m

£44

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 14/9

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Sat 19/9

12:15-13:30

Nonstop1h 15m

£45

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 14/9

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Sun 27/9

12:35-13:50

Nonstop1h 15m

£45

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 14/9

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Sat 19/9

12:15-13:30

Nonstop1h 15m

£47

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 14/9

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Sat 19/9

12:15-13:30

Nonstop1h 15m

£49

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 14/9

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Sat 19/9

12:15-13:30

Nonstop1h 15m

£50

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sun 13/9

10:50-12:05

Nonstop1h 15m

Southampton Eastleigh

Mon 14/9

12:25-13:40

Nonstop1h 15m

£62

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 24/10

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Sat 31/10

08:20-10:05

2 stops25h 45m

£102

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Mon 14/9

19:35-12:50

2 stops17h 15m

Southampton Eastleigh

Sun 27/9

12:35-13:50

Nonstop1h 15m

£117

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

How to get the cheapest flight ticket from Belfast Intl Airport to Southampton

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Belfast Intl Airport and Southampton?

Prices are currently low for flights on this route.

Typical prices usually range from £100 to £169.
The lowest price recently found on this route was £43.

What is the cheapest month to fly to Southampton?

The month of March is, on average, the cheapest month to fly to Southampton from Belfast Intl Airport, with most prices found around £97. If you’re not able to fly to Southampton in March, then April is your next best option. Flight prices from Belfast Intl Airport to Southampton during April average around £99.

What is the cheapest day to depart on your flight to Southampton?

Our data shows that Thursday is the least expensive day to fly to Southampton. Tickets to fly out on this day can be as low as £59. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around £122. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southampton.

What is the cheapest time of day to depart on your flight to Southampton?

According to our data, the cheapest time of day to fly to Southampton is in the morning. momondo users have found flights departing from Belfast Intl Airport to Southampton in the morning for as low as £129. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £143 on average. Flights to Southampton from Belfast Intl Airport at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Belfast Intl to Southampton Eastleigh flight route?

Fly from Belfast Intl to Southampton Eastleigh for the best Belfast Intl - Southampton Eastleigh flight prices

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

You are more likely to see cheaper flights to Southampton from Belfast Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Southampton for around £134 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southampton from Belfast Intl Airport for as low as £102 on momondo.

What cabin class options are available on Belfast Intl Airport to Southampton flights?

There is only 1 cabin class available to choose from on Belfast Intl Airport to Southampton flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Belfast Intl Airport to Southampton flights?

No. A direct flight is the cheapest option for a flight between Belfast Intl Airport to Southampton.

How have Belfast Intl Airport to Southampton flight prices changed over time?

As of July 2026, prices for Belfast Intl Airport to Southampton flights are approximately 33% more expensive when compared to flights at the same time last year.

When to book flights from Belfast Intl Airport to Southampton

Are you open to changing your travel dates? Check out the ideal times to fly from Belfast Intl Airport to Southampton according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Belfast Intl Airport to Southampton (BFS to SOU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Belfast Intl Airport to Southampton

Best price found

£87

Fastest flight time

1h 15m

Direct flights

Mon, Tue, Sat and Sun

Airports in Southampton

1 airport
The best flight deal from Belfast Intl Airport to Southampton found on momondo in the last 72 hours is £87
The fastest flight from Belfast Intl Airport to Southampton takes 1h 15m
Direct flights go from Belfast Intl Airport to Southampton on Monday, Tuesday, Saturday and Sunday. Airline offering direct flights is easyJet..
There is 1 airport in Southampton. From Belfast Intl Airport there are direct flights to Southampton Eastleigh (SOU).
Search flight deals

Frequently asked questions about flying from Belfast Intl Airport to Southampton

  • How far is Belfast Intl to Southampton Eastleigh by plane?

    Southampton Eastleigh is 327.5 mi away from Belfast Intl. 1h 15m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Belfast Intl Airport to Southampton Eastleigh Airport?

    Prices for flights from Belfast Intl Airport to Southampton Eastleigh Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Belfast Intl Airport to Southampton Eastleigh Airport?

  • How old do you have to be to fly from Belfast Intl Airport to Southampton Eastleigh Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast Intl Airport to Southampton Eastleigh Airport.

  • What documentation or ID do you need to fly to Southampton Eastleigh Airport?

    The necessary travel and health documents for your Southampton Eastleigh Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Belfast Intl Airport to Southampton?

  • What is the most popular airline from Belfast Intl Airport to Southampton?

Best airlines flying from Belfast Intl Airport to Southampton

Compare and see reviews for airlines that fly from Belfast Intl Airport to Southampton with momondo
Airline
Rating
Free Cancellation
Price
easyJetPriceFrom £40Free CancellationRating
6.9
1,919 reviews
Search easyJet flights
Aer LingusPriceFrom £86Free CancellationRating
7.3
1,682 reviews
Search Aer Lingus flights

  • easyJet Flights From Belfast Intl Airport to Southampton

    The lowest priced easyJet flight from Belfast Intl Airport to Southampton from the last 72 hours was £40. Generally, easyJet has 2 flights on this route every week with an average price of £109. easyJet is rated 6.9/10 by our users.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Portsmouth

Why use momondo?

Why should I use momondo to find a flight deal from Belfast to Southampton?

Finding the right flight to Southampton from Belfast is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Southampton quick and easy, saving you time and money.

Can I find flights from Belfast to Southampton with flexible booking policies on momondo?

Flights from Belfast to Southampton with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Belfast to Southampton?

momondo provides multiple filters to help you find the best flight to Southampton from Belfast. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Belfast to Southampton right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Belfast to Southampton now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Southampton and let you know when they change.

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