Cheap Flights from Belfast to Kos

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Flight deals from Belfast to Kos

Looking for a cheap last-minute deal or the best round-trip flight from Belfast to Kos Airport? If you want to travel next month, round-trip fares start from $209. Find the lowest prices on one-way and round-trip tickets right here.

Kos.$171 per passenger.Departing Tue, Jun 16, returning Tue, Jun 23.Round-trip flight with Ryanair.Outbound indirect flight with Ryanair, departing from Belfast International on Tue, Jun 16, arriving in Kos.Inbound indirect flight with Ryanair, departing from Kos on Tue, Jun 23, arriving in Belfast International.Price includes taxes and charges.From $171, select.

Kos.$180 per passenger.Departing Sun, May 31, returning Mon, Jun 8.Round-trip flight with easyJet and Ryanair.Outbound indirect flight with easyJet, departing from Belfast International on Sun, May 31, arriving in Kos.Inbound indirect flight with Ryanair, departing from Kos on Mon, Jun 8, arriving in Belfast International.Price includes taxes and charges.From $180, select.

Kos.$208 per passenger.Departing Sun, Jul 12, returning Mon, Jul 20.Round-trip flight with Ryanair.Outbound indirect flight with Ryanair, departing from Belfast International on Sun, Jul 12, arriving in Kos.Inbound indirect flight with Ryanair, departing from Kos on Mon, Jul 20, arriving in Belfast International.Price includes taxes and charges.From $208, select.

Kos.$209 per passenger.Departing Sun, May 10, returning Sun, May 17.Round-trip flight with easyJet and Ryanair.Outbound indirect flight with easyJet, departing from Belfast International on Sun, May 10, arriving in Kos.Inbound indirect flight with Ryanair, departing from Kos on Sun, May 17, arriving in Belfast International.Price includes taxes and charges.From $209, select.

Kos.$212 per passenger.Departing Mon, Apr 27, returning Mon, May 4.Round-trip flight with easyJet and Jet2.Outbound indirect flight with easyJet, departing from Belfast International on Mon, Apr 27, arriving in Kos.Inbound indirect flight with Jet2, departing from Kos on Mon, May 4, arriving in Belfast International.Price includes taxes and charges.From $212, select.

Kos.$242 per passenger.Departing Wed, Jul 1, returning Wed, Aug 5.Round-trip flight with Ryanair and easyJet.Outbound indirect flight with Ryanair, departing from Belfast International on Wed, Jul 1, arriving in Kos.Inbound indirect flight with easyJet, departing from Kos on Wed, Aug 5, arriving in Belfast International.Price includes taxes and charges.From $242, select.

Kos.$248 per passenger.Departing Sat, Apr 18, returning Sat, Apr 25.Round-trip flight with easyJet and SKY express.Outbound indirect flight with easyJet, departing from Belfast International on Sat, Apr 18, arriving in Kos.Inbound indirect flight with SKY express, departing from Kos on Sat, Apr 25, arriving in Belfast International.Price includes taxes and charges.From $248, select.

Kos.$280 per passenger.Departing Tue, Jun 30, returning Tue, Jul 7.Round-trip flight with Aer Lingus and easyJet.Outbound indirect flight with Aer Lingus, departing from Belfast City on Tue, Jun 30, arriving in Kos.Inbound indirect flight with easyJet, departing from Kos on Tue, Jul 7, arriving in Belfast International.Price includes taxes and charges.From $280, select.

Kos.$280 per passenger.Departing Tue, Jun 30, returning Wed, Aug 5.Round-trip flight with Ryanair.Outbound indirect flight with Ryanair, departing from Belfast International on Tue, Jun 30, arriving in Kos.Inbound indirect flight with Ryanair, departing from Kos on Wed, Aug 5, arriving in Belfast International.Price includes taxes and charges.From $280, select.

Kos.$282 per passenger.Departing Sat, Sep 26, returning Sun, Oct 11.Round-trip flight with Ryanair.Outbound indirect flight with Ryanair, departing from Belfast International on Sat, Sep 26, arriving in Kos.Inbound indirect flight with Ryanair, departing from Kos on Sun, Oct 11, arriving in Belfast International.Price includes taxes and charges.From $282, select.

Kos.$312 per passenger.Departing Sun, Sep 20, returning Sun, Sep 27.Round-trip flight with Ryanair.Outbound indirect flight with Ryanair, departing from Belfast International on Sun, Sep 20, arriving in Kos.Inbound indirect flight with Ryanair, departing from Kos on Sun, Sep 27, arriving in Belfast International.Price includes taxes and charges.From $312, select.

Kos.$321 per passenger.Departing Sat, May 30, returning Sat, Jun 13.Round-trip flight with TUI.Outbound direct flight with TUI departing from Belfast International on Sat, May 30, arriving in Kos.Inbound direct flight with TUI departing from Kos on Sat, Jun 13, arriving in Belfast International.Price includes taxes and charges.From $321, select.

Kos.$322 per passenger.Departing Sat, May 16, returning Sat, May 23.Round-trip flight with TUI.Outbound direct flight with TUI departing from Belfast International on Sat, May 16, arriving in Kos.Inbound direct flight with TUI departing from Kos on Sat, May 23, arriving in Belfast International.Price includes taxes and charges.From $322, select.

Kos.$336 per passenger.Departing Mon, Aug 17, returning Sat, Aug 22.Round-trip flight with easyJet.Outbound indirect flight with easyJet, departing from Belfast International on Mon, Aug 17, arriving in Kos.Inbound indirect flight with easyJet, departing from Kos on Sat, Aug 22, arriving in Belfast International.Price includes taxes and charges.From $336, select.

Kos.$348 per passenger.Departing Fri, Aug 28, returning Sun, Sep 6.Round-trip flight with Ryanair.Outbound indirect flight with Ryanair, departing from Belfast International on Fri, Aug 28, arriving in Kos.Inbound indirect flight with Ryanair, departing from Kos on Sun, Sep 6, arriving in Belfast City.Price includes taxes and charges.From $348, select.

Kos.$391 per passenger.Departing Sat, Jun 6, returning Sat, Jun 20.Round-trip flight with TUI.Outbound direct flight with TUI departing from Belfast International on Sat, Jun 6, arriving in Kos.Inbound direct flight with TUI departing from Kos on Sat, Jun 20, arriving in Belfast International.Price includes taxes and charges.From $391, select.

Find the cheapest month to fly from Belfast to Kos

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Belfast to Kos flights are currently cheapest in June.

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Direct flights from Belfast to Kos

Belfast to Kos: Flight information

The things to know before you go.

Cheapest flight found	$171
Cheapest month to fly	June
Average flight time	4 hrs, 15 mins
Most popular airline	TUI
Average flights per week	1

Finding cheap flights from Belfast to Kos: Frequently asked questions

How much are round-trip flights from Belfast to Kos?

The best price we found for a round-trip flight from Belfast to Kos is $171. 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.

How long does it take to fly from Belfast to Kos?

4 hours and 15 minutes is the average flight time from Belfast to Kos.

Which airlines fly direct from Belfast to Kos?

TUI flies direct from Belfast to Kos.

How many flights are there a week from Belfast to Kos?

There is one flight per week flying from Belfast to Kos, as of April 2026.

When is the cheapest time to fly from Belfast to Kos?

The cheapest month to fly from Belfast to Kos is usually June.

Which upcoming date is cheapest to fly from Belfast to Kos Airport on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Belfast to Kos Airport on Tuesday, June 16, 2026.

Can I get a direct flight from Belfast to Kos Airport?

Yes – the average flight time is 4 hours and 15 minutes.

How can I find the best flight deal to Kos?

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 Kos 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.

When is the best time to book flights to Kos?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Kos is around 40 days in advance, so don’t leave your flight to the last minute.

Traveling from Belfast to Kos Ippokratis International Airport (KGS): What you need to know

Kos is two hours ahead of Belfast. Kos Ippokratis International Airport is located in Kos, which is in the UTC+2 timezone.
To ensure you catch your flight from Belfast to KGS, allow plenty of time for things like check-in and baggage drop. Arriving two hours before international departures and one hour before domestic flights is the general rule.
You can expect longer queues during popular months such as June and other peak periods. Arriving up to four hours in advance for an international flight and two hours for domestic departures is a good idea.

Airports in Belfast

Belfast International Airport (BFS)

Stopovers are the perfect opportunity to take a break from traveling and perhaps even visit a new city. When searching for cheap flights from Belfast to KGS departing from Belfast International Airport (BFS), deselect the 'Direct flights only' box to find out where you can visit along the way. Some popular options include:
- London Gatwick Airport (LGW)
- London Stansted Airport (STN)
- Edinburgh Airport (EDI)
Located around 19 kilometers from central Belfast, BFS can be reached in about 25 minutes by car (depending on traffic). The journey on public transport takes roughly 45 minutes.
Catching an early flight from Belfast to Kos Ippokratis International Airport? Avoid rushing to the terminal (and sneak in some extra precious sleep) by choosing one of these stays near Belfast International Airport:
68% of flights that take off from Belfast International Airport touch down at their destination on time.

George Best Belfast City Airport (BHD)

Make the most of your vacation with a stopover on your flight from Belfast to Kos Ippokratis International Airport. Check out these connections between George Best Belfast City Airport and KGS:
- Manchester Airport (MAN)
- Glasgow Airport (GLA)
- East Midlands Airport (EMA)
BHD is around 5 kilometers from central Belfast. It'll take 15 minutes or so to get to the airport by car from the city center. Public transport takes roughly 25 minutes.
Want to enjoy an extra night away before your Belfast to KGS flight? Check in to a hotel near George Best Belfast City Airport before your adventure officially starts. These stays have a room with your name on it:
69% of all departures from George Best Belfast City Airport make it to their destination as expected.

About Kos Ippokratis International Airport (KGS)

If you're arriving on a late flight from Belfast to Kos Ippokratis International Airport, few things top the convenience of staying close to the terminal. Grab your bags from the carousel and then be showered and sleeping not long after at one of these hotels near KGS:
Grab a Kos Ippokratis International Airport rental car and explore Kos and beyond with your own wheels. Abbycar, Green Motion and Caldera are top outlets to choose from here.
Booking your vehicle around three weeks ahead of your Belfast to Kos Ippokratis International Airport flight can help you lock in a great deal.

Getting from Kos Ippokratis International Airport (KGS) to central Kos

Central Kos is around 26 kilometers from Kos Ippokratis International Airport and takes about 30 minutes to reach by car. Look into how to get from the airport to the city, whether that's with a cab, car rental or ride-share.
Traveling by public transport typically takes 40 minutes.

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

Currently, $83 is the lowest price we've found for a one-way ticket from Belfast to Kos Ippokratis International Airport. The cheapest price for a return flight is $171. Keep in mind fares may change due to demand at the time of booking.
Booking in advance is often the key to finding a cheap flight from Belfast to KGS. Flight prices rise as demand increases, so the closer you get to departure, the more you'll likely pay.
Affordable Belfast to Kos Ippokratis International Airport tickets are easier to find when your dates are flexible. Use the 'Whole month' search tool to compare fares across each month and then choose the cheapest day.
Locking in a cheap plane ticket from Belfast to KGS is a breeze with Price Alerts. All you need to do is set up one of these automatic alerts and we'll let you know as soon as prices go down.
Tailor your flights using filters. Choose your ideal departure and arrival times, airlines and total journey duration. You can also sort the results by 'Best,' 'Fastest' or 'Cheapest' flights from Belfast to Kos Ippokratis International Airport.

More about Kos

After booking your flight from Belfast to Kos Ippokratis International Airport, find a hotel that offers the right mix of comfort and location. Make one of these accommodation options your base for exploring Kos:
Your Kos trip won't be complete without checking out the sights. Highlights you won't want to miss include Paradise Beach, Agios Stefanos Beach and Xerokambos (Exotic Beach).

Explore more of Greece

Kos has plenty to offer, but there are so many other parts of Greece you should also see. Around 290 kilometers southwest of Kos, a trip to Rethymno will keep you on the move. Start with leading attractions like Rethymnon Old Town, Rethymnon beach and Venetian Harbour.
Mytilene is another well-known destination in Greece and is around 257 kilometers north of Kos. No trip is complete without experiencing Castle of Mytilene, Byzantine Museum and Mytilene Castle.