Istanbul to Cascade (IST-SEZ): nonstop upgrade & award space

Turkish Airlines flies nonstop from Istanbul (IST) to Cascade (SEZ) just three times a week. A long sector flown three times a week carries its premium cabin in short bursts: space appears around schedule loads and equipment changes and is gone by the next one. 2LNR tracks award seats on Turkish Airlines across every IST to SEZ date, so you can see whether a seat exists before you move points.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

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3
Nonstop flights a week
3,578 mi
Nonstop distance
Free
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Istanbul to Cascade flight schedule

Scheduled nonstop departures for IST to SEZ, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Istanbul (IST) to Cascade (SEZ)
Date Flight Airline Departs IST Arrives SEZ Duration Aircraft
TK 738Turkish Airlines20:5505:558h333
TK 738Turkish Airlines20:5505:558h333
TK 738Turkish Airlines20:5505:558h333
TK 738Turkish Airlines20:5505:558h333
TK 738Turkish Airlines20:5505:558h333
TK 738Turkish Airlines20:5505:558h333
TK 738Turkish Airlines20:5505:558h333

Showing all 7 scheduled IST to SEZ departures across the next 7 days with service. Later dates are on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every IST to SEZ date on the interactive map

Award seats on IST to SEZ departures

2LNR tracks award seats on Turkish Airlines, date by date. Open the calendar for Istanbul to Cascade to see whether a seat exists before you move points, the next 14 days free on every product and the full horizon on Pro.

See real availability

Confirmed upgrade and award seats on each IST to SEZ departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See IST to SEZ on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Istanbul to Cascade nonstop

Carriers operating IST to SEZ nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

See IST to SEZ on the interactive map →

Frequently asked questions about IST to SEZ

How far is Cascade from Istanbul?
IST to SEZ covers about 3,578 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from IST to SEZ?
Turkish Airlines is currently the only airline flying IST to SEZ nonstop. 2LNR tracks award seats on Turkish Airlines.
How often does IST to SEZ operate?
The nonstop currently runs three times a week, on Turkish Airlines. Thin schedules like this change by season, and an alert will catch anything added.
What time do flights from IST to SEZ depart?
In the next 7 days with service, every scheduled IST to SEZ nonstop leaves at 20:55 local time at Istanbul. The schedule table on this page lists each departure by date.
How do I check upgrade or award availability on IST to SEZ?
Open the IST to SEZ route on the interactive map or the matrix to see award seats by date on Turkish Airlines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.

Never miss IST to SEZ upgrade or award space

See what is open by date on this route, the next 14 days free on every product and the full horizon on Pro.

Get started free