Cheap Flights from Frankfurt to Kos

View €106 flight on Fri, 22 Aug 2025Opens in a new window

Popular airlines from Frankfurt to Kos

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Cheap flights from Frankfurt to Kos (FRA-LRS)

Prices were available within the past 7 days and start at €106 for one-way flights and €353 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Fri, 15 Aug - Mon, 18 Aug
FRA
Frankfurt
KGS
Kos
€353 Return, found 5 days ago
€353
Return
found 5 days ago
Select Swiss International Air Lines flight, departing Fri, 15 Aug from Frankfurt to Kos, returning Mon, 18 Aug, priced at €353 found 5 days ago
Swiss International Air Lines
Fri, 15 Aug - Mon, 18 Aug
FRA
Frankfurt
KGS
Kos
€356 Return, found 5 days ago
€356
Return
found 5 days ago
Select Swiss International Air Lines flight, departing Fri, 15 Aug from Frankfurt to Kos, returning Mon, 18 Aug, priced at €356 found 5 days ago
Brussels Airlines
Fri, 15 Aug - Mon, 18 Aug
FRA
Frankfurt
KGS
Kos
€360 Return, found 5 days ago
€360
Return
found 5 days ago
Select Brussels Airlines flight, departing Fri, 15 Aug from Frankfurt to Kos, returning Mon, 18 Aug, priced at €360 found 5 days ago
Involatus
Fri, 15 Aug - Mon, 18 Aug
FRA
Frankfurt
KGS
Kos
€360 Return, found 5 days ago
€360
Return
found 5 days ago
Select Involatus flight, departing Fri, 15 Aug from Frankfurt to Kos, returning Mon, 18 Aug, priced at €360 found 5 days ago
Austrian Airlines
Fri, 15 Aug - Mon, 18 Aug
FRA
Frankfurt
KGS
Kos
€364 Return, found 5 days ago
€364
Return
found 5 days ago
Select Austrian Airlines flight, departing Fri, 15 Aug from Frankfurt to Kos, returning Mon, 18 Aug, priced at €364 found 5 days ago
Lufthansa
Fri, 15 Aug - Mon, 18 Aug
FRA
Frankfurt
KGS
Kos
€397 Return, found 5 days ago
€397
Return
found 5 days ago
Select Lufthansa flight, departing Fri, 15 Aug from Frankfurt to Kos, returning Mon, 18 Aug, priced at €397 found 5 days ago

Find the cheapest month to fly from Frankfurt (FRA) to Kos (KGS)

June is typically the cheapest month to fly

From €154 - €308 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.