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Seattle to Istanbul flights in April 2027 from $412 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 April 2027, the cheapest return found recently is $733 with Icelandair, 6 Apr 2027 – 19 Apr 2027, found 2 days ago. The cheapest one-way found recently is $412 with Discover Airlines, 1 Apr 2027, found 7 days ago.

Return

In April 2027, the cheapest return fare on each of 8 departure dates is usually $824 to $846. 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, 1 is usually cheaper than April 2027.

Cheapest return found recently

$733

6 Apr 2027 – 19 Apr 2027 · Icelandair

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

out 3 stops, back 3 stops

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 April 2027

DatesFromAirlineStopsFound
6 Apr 2027 – 19 Apr 2027$733Icelandairout 3 stops, back 3 stopsfound 2 days agoSee prices for these dates
13 Apr 2027 – 19 Apr 2027$810United Airlinesout 2 stops, back 2 stopsfound 2 days agoSee prices for these dates
3 Apr 2027 – 19 Apr 2027$829United Airlinesout 2 stops, back 2 stopsfound 2 days agoSee prices for these dates
17 Apr 2027 – 8 May 2027$839United Airlinesout 2 stops, back 2 stopsfound 2 days agoSee prices for these dates
25 Apr 2027 – 8 May 2027$839United Airlinesout 2 stops, back 2 stopsfound 2 days agoSee prices for these dates

Every date we hold

8 departure dates

1 Apr 2027 – 11 Apr 2027: $936, found 2 days ago3 Apr 2027 – 19 Apr 2027: $829, found 2 days ago4 Apr 2027 – 17 Apr 2027: $862, found 2 days ago6 Apr 2027 – 19 Apr 2027: $733, found 2 days ago13 Apr 2027 – 19 Apr 2027: $810, found 2 days ago14 Apr 2027 – 17 Apr 2027: $840, found 4 days ago17 Apr 2027 – 8 May 2027: $839, found 2 days ago25 Apr 2027 – 8 May 2027: $839, found 2 days agoApr
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Apr 2027 – 11 Apr 2027$936United AirlinesSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out 2 stops, back 1 stopfound 2 days agoSee prices for these dates
3 Apr 2027 – 19 Apr 2027$829United AirlinesSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out 2 stops, back 2 stopsfound 2 days agoSee prices for these dates
4 Apr 2027 – 17 Apr 2027$862British AirwaysSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 2 days agoSee prices for these dates
6 Apr 2027 – 19 Apr 2027$733IcelandairSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out 3 stops, back 3 stopsfound 2 days agoSee prices for these dates
13 Apr 2027 – 19 Apr 2027$810United AirlinesSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out 2 stops, back 2 stopsfound 2 days agoSee prices for these dates
14 Apr 2027 – 17 Apr 2027$840IcelandairSeattle-Tacoma International Airport (SEA) → Sabiha Gokcen International Airport (SAW)out 3 stops, back 3 stopsfound 4 days agoSee prices for these dates
17 Apr 2027 – 8 May 2027$839United AirlinesSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out 2 stops, back 2 stopsfound 2 days agoSee prices for these dates
25 Apr 2027 – 8 May 2027$839United AirlinesSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)out 2 stops, back 2 stopsfound 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 datesEvery date in December 2026
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 dates
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

One-way

We hold one-way fares on only 1 departure date in April 2027, too few to say what one usually costs.

Cheapest one-way found recently

$412

1 Apr 2027 · Discover Airlines

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

1 stop

found 7 days ago

Open this tripCheck today's price

It is also the cheapest one-way we hold, of any age.

FareTell may earn a commission when you book through a partner.

The cheapest dates in April 2027

DatesFromAirlineStopsFound
1 Apr 2027$412Discover Airlines1 stopfound 7 days agoOpen this trip

Every date we hold

1 departure date

See every date as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
1 Apr 2027$412Discover AirlinesSeattle-Tacoma International Airport (SEA) → Istanbul New Airport (IST)1 stopfound 7 days agoOpen this trip

Which month looks cheapest?

January 2027 is the cheapest month — from $357.

January 2027From $357Cheapest seen1 departure date13 Jan 2027 · found 3 days agoOpen this trip
March 2027From $3611 departure date31 Mar 2027 · found 7 days agoOpen this tripEvery date in March 2027
April 2027From $4121 departure date1 Apr 2027 · found 7 days agoOpen this trip
May 2027From $5091 departure date28 May 2027 · found 5 days agoOpen this trip
June 2027From $5115 departure dates8 Jun 2027 · found 7 days agoOpen this trip
July 2027From $4041 departure date5 Jul 2027 · found 3 days agoOpen this trip

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