--- title: "Istanbul (IST) to Cascade (SEZ) flights: who flies it" description: "Turkish Airlines flies nonstop from IST to SEZ, about 5 flights a week as TK 738, scheduled at 8h to 8h 5m. See award seats by date on 2LNR, the next 14 days free." canonical: "https://2lnr.com/routes/ist-sez" url: "https://2lnr.com/routes/ist-sez.md" date_modified: "2026-10-18T05:10:47Z" --- # Istanbul to Cascade (IST-SEZ): nonstop flights and award space Turkish Airlines flies the IST to SEZ nonstop about 5 times a week. In the timetable below it flies as TK 738, scheduled at 8h to 8h 5m for the 3,578 miles. 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 October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 24, 2026. See IST to SEZ on the interactive map [Get started free](https://2lnr.com/login) 5 Flights a week, 4-week average 8h to 8h 5m Scheduled flight time 3,578 mi Nonstop distance Free To get started ## Istanbul to Cascade flight schedule Scheduled nonstop departures for IST to SEZ starting October 23, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Istanbul (IST) to Cascade (SEZ) | Date | Flight | Airline | Departs IST | Arrives SEZ | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Sat, Oct 24 | TK 738 | Turkish Airlines | 22:30 | 07:30 | 8h | [Airbus A330-300](https://2lnr.com/seatmaps/tk/a330-300.md) | | Mon, Oct 26 | TK 738 | Turkish Airlines | 22:25 | 07:30 | 8h 5m | Airbus A330-300 | | Tue, Oct 27 | TK 738 | Turkish Airlines | 22:25 | 07:30 | 8h 5m | Airbus A330-300 | | Wed, Oct 28 | TK 738 | Turkish Airlines | 22:25 | 07:30 | 8h 5m | Airbus A330-300 | | Thu, Oct 29 | TK 738 | Turkish Airlines | 22:25 | 07:30 | 8h 5m | Airbus A330-300 | | Sat, Oct 31 | TK 738 | Turkish Airlines | 22:25 | 07:30 | 8h 5m | Airbus A330-300 | | Mon, Nov 2 | TK 738 | Turkish Airlines | 22:25 | 07:30 | 8h 5m | Airbus A330-300 | Showing all 7 scheduled IST to SEZ departures across 7 days with service, starting October 23, 2026. 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 hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every IST to SEZ date on the interactive map ## Aircraft on the Istanbul to Cascade nonstop Turkish Airlines flies the [Airbus A330-300](https://2lnr.com/seatmaps/tk/a330-300.md) on every departure in the schedule table on this page. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## 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. Turkish Airlines award space was open on none of the 8 Istanbul to Cascade departure dates from October 19 to November 1 that 2LNR checked in the 7 days to October 19, 2026. ### See real availability Award seats by date on the IST to SEZ departures 2LNR tracks, checked against live inventory so you know what's open before you book. ### Set an alert Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're 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. Where 2LNR tracks the carrier, its departures show award space by date. - [Turkish Airlines (TK) route map](https://2lnr.com/routes/airlines/tk.md)\ [The aircraft TK flies](https://2lnr.com/seatmaps/tk.md) See IST to SEZ on the interactive map → ## Frequently asked questions about IST to SEZ **How long is the flight from Istanbul (IST) to Cascade (SEZ)?** Scheduled flight times from Istanbul (IST) to Cascade (SEZ) run from 8h to 8h 5m across the departures in the schedule table on this page. The nonstop covers about 3,578 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **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 many flights a week are there from IST to SEZ?** About 5 nonstop flights a week run between Istanbul (IST) and Cascade (SEZ) in the current schedule, operated by Turkish Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from IST to SEZ depart?** Scheduled IST to SEZ nonstops in the next 7 days with service leave between 22:25 and 22:30, local time at Istanbul. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate IST to SEZ nonstop?** Turkish Airlines flies TK 738 nonstop from Istanbul (IST) to Cascade (SEZ), the only flight number in the schedule table on this page. The table lists each date with its departure and arrival times and aircraft. **How do I check 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. Flying the other way? See [SEZ to IST nonstop flights and award space](https://2lnr.com/routes/sez-ist.md). Award seats rather than schedules? See [Turkish Airlines award availability](https://2lnr.com/awards/tk.md). Looking beyond this route? See [every route from Istanbul (IST)](https://2lnr.com/routes/ist.md), or [every route from Cascade (SEZ)](https://2lnr.com/routes/sez.md). - [How to plan an upgrade by route](https://2lnr.com/guides/upgrade-strategy.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## See IST to SEZ award space by date See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)