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Porto to Istanbul flights in December 2026 from $311 OPO → IST, SAW

Porto Airport (OPO) → Istanbul New Airport (IST), Sabiha Gokcen International Airport (SAW)

For departures in December 2026, the cheapest return found recently is $311 with Air Europa, 9 Dec – 16 Dec, found 2 days ago.

Return

In December 2026, the cheapest return fare on each of 12 departure dates is usually $306 to $345. Across all 21 departure dates we hold on this route, it is usually $292 to $344. Of the 2 months with enough return fares to compare, December 2026 is usually the cheapest.

Cheapest return found recently

$311

9 Dec – 16 Dec · Air Europa

Porto Airport (OPO) → Istanbul New Airport (IST)

out 1 stop, back 1 stop

found 2 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$265

3 Dec – 10 Dec · easyJet

Porto Airport (OPO) → Sabiha Gokcen International Airport (SAW)

out 1 stop, back 1 stop

found 4 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
3 Dec – 10 Dec$265easyJetout 1 stop, back 1 stopfound 4 days agoSee prices for these dates
19 Dec – 5 Jan 2027$276Ryanairout 2 stops, back 3 stopsfound 5 days agoSee prices for these dates
2 Dec – 9 Dec$292Vuelingout 1 stop, back 1 stopfound 4 days agoSee prices for these dates
18 Dec – 5 Jan 2027$310Ryanairout 2 stops, back 2 stopsfound 5 days agoSee prices for these dates
9 Dec – 16 Dec$311Air Europaout 1 stop, back 1 stopfound 2 days agoSee prices for these dates

Every date we hold

12 departure dates

2 Dec – 9 Dec: $292, found 4 days ago3 Dec – 10 Dec: $265, found 4 days ago9 Dec – 16 Dec: $311, found 2 days ago13 Dec – 20 Dec: $347, found 2 days ago15 Dec – 22 Dec: $333, found 2 days ago18 Dec – 5 Jan 2027: $310, found 5 days ago19 Dec – 5 Jan 2027: $276, found 5 days ago20 Dec – 27 Dec: $313, found 4 days ago22 Dec – 29 Dec: $402, found 2 days ago24 Dec – 4 Jan 2027: $371, found 4 days ago27 Dec – 9 Jan 2027: $344, found 6 days ago28 Dec – 12 Jan 2027: $317, found 6 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
2 Dec – 9 Dec$292VuelingPorto Airport (OPO) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
3 Dec – 10 Dec$265easyJetPorto Airport (OPO) → Sabiha Gokcen International Airport (SAW)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
9 Dec – 16 Dec$311Air EuropaPorto Airport (OPO) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 2 days agoSee prices for these dates
13 Dec – 20 Dec$347LufthansaPorto Airport (OPO) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 2 days agoSee prices for these dates
15 Dec – 22 Dec$333VuelingPorto Airport (OPO) → Istanbul New Airport (IST)out 1 stop, back 1 stopfound 2 days agoSee prices for these dates
18 Dec – 5 Jan 2027$310RyanairPorto Airport (OPO) → Sabiha Gokcen International Airport (SAW)out 2 stops, back 2 stopsfound 5 days agoSee prices for these dates
19 Dec – 5 Jan 2027$276RyanairPorto Airport (OPO) → Sabiha Gokcen International Airport (SAW)out 2 stops, back 3 stopsfound 5 days agoSee prices for these dates
20 Dec – 27 Dec$313Wizz Air MaltaPorto Airport (OPO) → Sabiha Gokcen International Airport (SAW)out 2 stops, back 2 stopsfound 4 days agoSee prices for these dates
22 Dec – 29 Dec$402Wizz Air MaltaPorto Airport (OPO) → Sabiha Gokcen International Airport (SAW)out 2 stops, back 3 stopsfound 2 days agoSee prices for these dates
24 Dec – 4 Jan 2027$371RyanairPorto Airport (OPO) → Sabiha Gokcen International Airport (SAW)out 2 stops, back 2 stopsfound 4 days agoSee prices for these dates
27 Dec – 9 Jan 2027$344RyanairPorto Airport (OPO) → Sabiha Gokcen International Airport (SAW)out 2 stops, back 1 stopfound 6 days agoSee prices for these dates
28 Dec – 12 Jan 2027$317RyanairPorto Airport (OPO) → Sabiha Gokcen International Airport (SAW)out 2 stops, back 2 stopsfound 6 days agoSee prices for these dates

Which month looks cheapest?

January 2027 is the cheapest month — from $246.

November 2026From $2924 departure dates30 Nov – 2 Dec · found 6 days agoSee prices for these dates
December 2026From $26512 departure dates3 Dec – 10 Dec · found 4 days agoSee prices for these dates
January 2027From $246Cheapest seen2 departure dates11 Jan 2027 – 17 Jan 2027 · found 5 days agoSee prices for these dates
April 2027From $2991 departure date21 Apr 2027 – 25 Apr 2027 · found 2 days agoSee prices for these dates
June 2027From $2871 departure date7 Jun 2027 – 13 Jun 2027 · found 7 days agoSee prices for these dates
July 2027From $3181 departure date1 Jul 2027 – 11 Jul 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