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Seoul to Istanbul in December 2026 GMP, ICN → IST, SAW

Gimpo International Airport (GMP), Incheon International Airport (ICN) → Istanbul New Airport (IST), Sabiha Gokcen International Airport (SAW)

For departures in December 2026, the cheapest return found recently is $536 with Air China, 24 Dec – 6 Jan 2027, found yesterday.

Return

In December 2026, the cheapest return fare on each of 7 departure dates is usually $524 to $576. Across all 25 departure dates we hold on this route, it is usually $535 to $709. Of the 4 months with enough return fares to compare, 2 are usually cheaper than December 2026.

Cheapest return found recently

$536

24 Dec – 6 Jan 2027 · Air China

Incheon International Airport (ICN) → Istanbul New Airport (IST)

out 1 stop, back 1 stop

found yesterday

See prices for these datesCheck today's price

Cheapest we hold, of any age

$510

15 Dec – 4 Jan 2027 · Air China

Incheon International Airport (ICN) → Istanbul New Airport (IST)

out 1 stop, back 1 stop

found 5 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
15 Dec – 4 Jan 2027$510Air Chinaout 1 stop, back 1 stopfound 5 days agoSee prices for these dates
17 Dec – 23 Dec$512China Easternout 1 stop, back 1 stopfound 3 days agoSee prices for these dates
24 Dec – 6 Jan 2027$536Air Chinaout 1 stop, back 1 stopfound yesterdaySee prices for these dates
4 Dec – 9 Dec$558China Southern Airlinesout 1 stop, back 1 stopfound 3 days agoSee prices for these dates
23 Dec – 15 Jan 2027$569China Southern Airlinesout 1 stop, back 1 stopfound 2 days agoSee prices for these dates

Every date we hold

7 departure dates

4 Dec – 9 Dec: $558, found 3 days ago15 Dec – 4 Jan 2027: $510, found 5 days ago17 Dec – 23 Dec: $512, found 3 days ago20 Dec – 15 Jan 2027: $583, found 6 days ago23 Dec – 15 Jan 2027: $569, found 2 days ago24 Dec – 6 Jan 2027: $536, found yesterday28 Dec – 26 Feb 2027: $710, found 6 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
4 Dec – 9 Dec$558China Southern AirlinesIncheon International Airport (ICN) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
15 Dec – 4 Jan 2027$510Air ChinaIncheon International Airport (ICN) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 5 days agoSee prices for these dates
17 Dec – 23 Dec$512China EasternIncheon International Airport (ICN) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 3 days agoSee prices for these dates
20 Dec – 15 Jan 2027$583Air ChinaGimpo International Airport (GMP) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
23 Dec – 15 Jan 2027$569China Southern AirlinesIncheon International Airport (ICN) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 2 days agoSee prices for these dates
24 Dec – 6 Jan 2027$536Air ChinaIncheon International Airport (ICN) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound yesterdaySee prices for these dates
28 Dec – 26 Feb 2027$710Qatar AirwaysIncheon International Airport (ICN) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates

Which month looks cheapest?

October 2026 is the cheapest month — from $399.

October 2026From $399Cheapest seen4 departure dates26 Oct – 4 Nov · found 6 days agoSee prices for these dates
November 2026From $5154 departure dates16 Nov – 30 Nov · found 4 days agoSee prices for these dates
December 2026From $5107 departure dates15 Dec – 4 Jan 2027 · found 5 days agoSee prices for these dates
January 2027From $5355 departure dates7 Jan 2027 – 11 Jan 2027 · found yesterdaySee prices for these dates
February 2027From $6791 departure date1 Feb 2027 – 9 Feb 2027 · found 6 days agoSee prices for these dates
March 2027From $6411 departure date20 Mar 2027 – 3 Apr 2027 · found 6 days agoSee prices for these dates
July 2027From $6952 departure dates16 Jul 2027 – 26 Jul 2027 · found 2 days agoSee prices for these dates
August 2027From $6711 departure date30 Aug 2027 – 10 Sept 2027 · found 6 days agoSee prices for these dates

Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work