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Cheap Flights from Kos to Belfast

Compare Kos to Belfast flight deals

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Flight deals from Kos Airport to Belfast

Looking for a cheap last-minute deal or the best return flight from Kos to Belfast? Find the lowest prices on one-way and return tickets right here.
Belfast.ر.ق.‏ 362 per passenger.Departing Thu, 18 Jun.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from Kos on Thu, 18 Jun, arriving in Belfast International.Price includes taxes and charges.From ر.ق.‏ 362, select.
Belfast.ر.ق.‏ 484 per passenger.Departing Tue, 19 May.One-way flight with Aegean Airlines.Outbound indirect flight with Aegean Airlines, departs from Kos on Tue, 19 May, arriving in Belfast International.Price includes taxes and charges.From ر.ق.‏ 484, select.
Belfast.ر.ق.‏ 650 per passenger.Departing Sat, 28 Mar.One-way flight with SKY express.Outbound indirect flight with SKY express, departs from Kos on Sat, 28 Mar, arriving in Belfast International.Price includes taxes and charges.From ر.ق.‏ 650, select.
Belfast.ر.ق.‏ 865 per passenger.Departing Sat, 29 Aug.One-way flight with Condor.Outbound indirect flight with Condor, departs from Kos on Sat, 29 Aug, arriving in Belfast International.Price includes taxes and charges.From ر.ق.‏ 865, select.
Belfast.ر.ق.‏ 958 per passenger.Departing Sat, 20 Jun.One-way flight with TUI.Outbound direct flight with TUI departs from Kos on Sat, 20 Jun, arriving in Belfast International.Price includes taxes and charges.From ر.ق.‏ 958, select.
Belfast.ر.ق.‏ 958 per passenger.Departing Sat, 16 May.One-way flight with TUI.Outbound direct flight with TUI departs from Kos on Sat, 16 May, arriving in Belfast International.Price includes taxes and charges.From ر.ق.‏ 958, select.

Find the cheapest month to fly from Kos to Belfast

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Kos to Belfast flights are currently cheapest in June.
Mar
from ر.ق.‏ 650
Apr
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May
from ر.ق.‏ 484
Jun
from ر.ق.‏ 362
Jul
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Aug
from ر.ق.‏ 865
Sep
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Oct
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Nov
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Dec
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Jan
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Feb
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Direct flights from Kos to Belfast

Alternative Kos to Belfast routes

Looking for the cheapest, fastest or easiest route from Kos to Belfast? You could fly into the following airports instead.

Belfast City

4km from central Belfast
Closest
from ر.ق.‏ 489
Search flights

Belfast International

20km from central Belfast
Cheapest
from ر.ق.‏ 362
Search flights

Kos to Belfast: Flight information

The things to know before you go.
Cheapest flight foundر.ق.‏ 362
Cheapest month to flyJune
Average flight time4 hrs, 45 mins
Most popular airlineTUI
Average flights per week1

Finding cheap flights from Kos to Belfast: Frequently asked questions

There are 2 airports in Belfast: Belfast City and Belfast International.
The best price we found for a return flight from Kos to Belfast is ر.ق.‏ 971. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
4 hours and 45 minutes is the average flight time from Kos to Belfast.
TUI flies direct from Kos to Belfast.
As of March 2026, there is one flight per week flying from Kos to Belfast.
The cheapest month to fly from Kos to Belfast is usually September.
If you're flying from Kos Airport, the cheapest airport near Belfast is Belfast International – which is 19.6 km away from the centre of Belfast. We've found flights into this airport from ر.ق.‏ 971.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Kos Airport to Belfast on Sunday, 13 September 2026.
Yes – the average flight time is 4 hours and 45 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Belfast but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Belfast is around 40 days in advance, so don’t leave your flight to the last minute.
In March, the average temperature is usually around 6°C. August is typically the warmest month in Belfast, when it usually averages around 17°C. You can expect the least rain in May. The coldest month is January, with temperatures averaging 4°C. The rainiest month is October.
Currently, Ryanair offers the cheapest flight tickets to Belfast.

Travelling from Kos Airport (KGS) to Belfast: what you need to know

  • To avoid rushing for your KGS to Belfast flight, leave plenty of time for things like check-in and baggage drop. Arriving two hours ahead of international departures and one hour before domestic flights is the general rule.

  • We make it easy to book flight tickets from KGS to Belfast with a stopover. To see your options, uncheck 'Direct flights only.' Next, choose a flight that has a stop long enough to tour the city of your choice. The most sought-after stopovers include:

    • London Heathrow Airport (LHR)

    • Amsterdam Airport Schiphol (AMS)

    • Frankfurt Airport (FRA)

  • 89.58% of flights departing from Kos Airport reach their destination as planned. Given its reliable on-time performance, delays are unlikely when jetting out of KGS.

How to find the cheapest flights from Kos Airport (KGS) to Belfast

  • The lowest price we've seen for a one-way Kos Airport to Belfast flight is ر.ق.‏ 362. The cheapest price for a return flight is ر.ق.‏ 971. Keep in mind fares can change due to availability at the time of booking.

  • Don't leave everything to the last moment. You're more likely to land cheap flights from KGS to Belfast if you book in advance. Airlines often offer some excellent early bird rates.

  • The 'Whole month' tool will show you the cheapest tickets from Kos Airport to Belfast across every month. It's a great way to find a bargain if your plans aren't set in stone.

  • Snapping up a cheap flight from KGS to Belfast is a breeze with Price Alerts. All you need to do is create one of these automatic notifications and we'll notify you when the price has dropped.

  • Choose your preferred arrival and departure times, number of stops and airlines with our filters. Then, sort the results for your flight from Kos Airport to Belfast by 'Fastest,' 'Best' or 'Cheapest.'

Airports in Belfast

Belfast International Airport (BFS)

  • Belfast International Airport (BFS) is around 32 kilometres from central Belfast. If you're catching a cab or a ride-share, the drive will take roughly 30 minutes.

  • If you're using public transport, expect a journey time of around 2 hours.

  • If you have a late flight from Kos Airport to Belfast, few things beat the convenience of staying close to the terminal. Collect your bags from the carousel and then be showered and resting not long after at one of these accommodation options near BFS:

  • Grab a Belfast International Airport rental car and explore Belfast and beyond with your own set of wheels. Budget, Drivalia and Dollar are well-known companies to choose from here.

  • Get the best deal by reserving your ride from Belfast International Airport about three weeks ahead of your flight from KGS to Belfast.

George Best Belfast City Airport (BHD)

  • After your flight from Kos Airport to Belfast has hit the runway, you can get to the city centre in around 10 minutes by car. Central Belfast is roughly 8 kilometres from George Best Belfast City Airport (BHD).

  • If you choose to travel on public transport, you'll reach the centre in 20 minutes or so.

  • There are some comfortable places to rest your head close to BHD. Settle in and get cosy after your KGS to Belfast flight at any of these perfectly located options:

  • The fastest way to get to where you're going is with a George Best Belfast City Airport rental car. Grab your wheels from Budget, Sixt or Alamo and get going in the blink of an eye.

  • Get the pick of the lot. Securing your ride from BHD two weeks ahead of time often means more savings and a greater selection of vehicles.

Best time to go to Belfast

  • Carefully consider your dates before locking in your flight from Kos Airport to Belfast. The city buzzes in peak season, but hotel rates are generally higher and attractions can be busy. Visit Belfast in the off-season for a quieter vibe.

  • Lock in a Kos Airport to Belfast flight ticket with a departure in July if you want to experience the city during its warmest month. Expect temperatures to range from 10ºC to 19ºC.

  • Look for cheap tickets from KGS to Belfast in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between 1ºC and 8ºC on average.

More about Belfast

  • Start your Belfast trip off on the right foot by choosing the ideal place to stay. After booking your flight from Kos Airport to Belfast, browse our selection of hotels including:

  • There are so many things to see and do in this city it can be hard to know where to begin. Crumlin Road Gaol Visitor Attraction and Conference Centre, Titanic Belfast and Botanic Gardens are popular attractions which should be on any good Belfast itinerary.

Explore more of United Kingdom

  • Belfast has its own special appeal, but there are so many other corners of United Kingdom just waiting to be discovered. Around 354 kilometres south-east of Belfast, a trip to Birmingham will keep your itinerary packed. Start with popular sights like Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • Around 418 kilometres south-east of Belfast, Bristol is another favourite stop in United Kingdom. Start your sightseeing at Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.

Plan the rest of your trip from Kos to Belfast

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.