Route guide

Istanbul to Constantine (IST-CZL): Nonstop Upgrade & Award Space

Air Algérie and Turkish Airlines fly the IST to CZL nonstop about 8 times a week. That's enough service to give you a real choice of departures, though premium seats don't sit unclaimed for long. 2LNR watches every IST to CZL departure for confirmed upgrade and award space and can alert you when a date you're tracking opens up.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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8
Nonstop flights a week
1,238 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every IST to CZL departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Istanbul to Constantine to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each IST to CZL 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 CZL on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Istanbul to Constantine nonstop

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

  • Air Algérie
  • Turkish Airlines
See IST to CZL on the interactive map →

Frequently asked questions about IST to CZL

How far is Constantine from Istanbul?
IST to CZL covers about 1,238 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from IST to CZL?
Air Algérie and Turkish Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on both of them.
How many flights a week are there from IST to CZL?
About 8 nonstop flights a week run between Istanbul and Constantine in the current schedule, operated by Air Algérie and Turkish Airlines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on IST to CZL?
Open the IST to CZL calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Istanbul to Constantine route, and 2LNR will notify you when space opens. It's free to start.

Never miss IST to CZL upgrade or award space

Track confirmed availability, set alerts, and book with confidence. Free to start, no credit card required.

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