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Seattle to Istanbul flights in December 2026 from $935 BFI, SEA → IST, SAW

Boeing Field International Airport (BFI), Seattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST), Sabiha Gokcen International Airport (SAW)

For departures in December 2026, the cheapest return found recently is $935 with Turkish Airlines, 2 Dec – 7 Dec, found 2 days ago.

Return

In December 2026, the cheapest return fare on each of 7 departure dates is usually $957 to $1,308. Across all 43 departure dates we hold on this route, it is usually $832 to $1,021. Of the 6 months with enough return fares to compare, 3 are usually cheaper than December 2026.

Cheapest return found recently

$935

2 Dec – 7 Dec · Turkish Airlines

Seattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)

out nonstop, back nonstop

found 2 days ago

See prices for these datesCheck today's price

It is also the cheapest return we hold, of any age.

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
2 Dec – 7 Dec$935Turkish Airlinesout nonstop, back nonstopfound 2 days agoSee prices for these dates
1 Dec – 4 Dec$943Icelandairout 2 stops, back 2 stopsfound 5 days agoSee prices for these dates
27 Dec – 8 Jan 2027$971British Airwaysout 1 stop, back 1 stopfound 2 days agoSee prices for these dates
4 Dec – 11 Dec$976Turkish Airlinesout nonstop, back nonstopfound 2 days agoSee prices for these dates
7 Dec – 14 Dec$1,029British Airwaysout 1 stop, back 1 stopfound 2 days agoSee prices for these dates

Every date we hold

7 departure dates

1 Dec – 4 Dec: $943, found 5 days ago2 Dec – 7 Dec: $935, found 2 days ago4 Dec – 11 Dec: $976, found 2 days ago7 Dec – 14 Dec: $1,029, found 2 days ago18 Dec – 25 Dec: $1,912, found 2 days ago24 Dec – 30 Dec: $1,587, found 2 days ago27 Dec – 8 Jan 2027: $971, found 2 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Dec – 4 Dec$943IcelandairSeattle-Tacoma International Airport (SEA) → Sabiha Gokcen International Airport (SAW)out 2 stops, back 2 stopsfound 5 days agoSee prices for these dates
2 Dec – 7 Dec$935Turkish AirlinesSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out nonstop, back nonstopfound 2 days agoSee prices for these dates
4 Dec – 11 Dec$976Turkish AirlinesSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out nonstop, back nonstopfound 2 days agoSee prices for these dates
7 Dec – 14 Dec$1,029British AirwaysSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 2 days agoSee prices for these dates
18 Dec – 25 Dec$1,912United AirlinesSeattle-Tacoma International Airport (SEA) → Sabiha Gokcen International Airport (SAW)out 3 stops, back 3 stopsfound 2 days agoSee prices for these dates
24 Dec – 30 Dec$1,587WestJetSeattle-Tacoma International Airport (SEA) → Sabiha Gokcen International Airport (SAW)out 2 stops, back 2 stopsfound 2 days agoSee prices for these dates
27 Dec – 8 Jan 2027$971British AirwaysSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 2 days agoSee prices for these dates

Which month looks cheapest?

February 2027 is the cheapest month — from $714.

November 2026From $9538 departure dates28 Nov – 19 Dec · found 4 days agoSee prices for these datesEvery date in November 2026
December 2026From $9357 departure dates2 Dec – 7 Dec · found 2 days agoSee prices for these dates
January 2027From $8273 departure dates14 Jan 2027 – 22 Jan 2027 · found 2 days agoSee prices for these dates
February 2027From $714Cheapest seen3 departure dates3 Feb 2027 – 9 Feb 2027 · found 4 days agoSee prices for these dates
March 2027From $7558 departure dates23 Mar 2027 – 19 Apr 2027 · found 2 days agoSee prices for these datesEvery date in March 2027
April 2027From $7338 departure dates6 Apr 2027 – 19 Apr 2027 · found 2 days agoSee prices for these datesEvery date in April 2027
May 2027From $9451 departure date31 May 2027 – 7 Jun 2027 · found 2 days agoSee prices for these dates
June 2027From $9852 departure dates3 Jun 2027 – 12 Jun 2027 · found 2 days agoSee prices for these dates
September 2027From $8252 departure dates6 Sept 2027 – 15 Sept 2027 · found 4 days agoSee prices for these dates
October 2027From $1,0581 departure date31 Oct 2027 – 6 Nov 2027 · found 2 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