IAH → ISTHouston to Istanbul

live

Direct flights from Houston (IAH) to Istanbul (IST): 7 nonstop departures observed each week across 1 airline. The median arrival is on schedule. No cancellations were recorded across the 2 tracked flights. The nonstop covers 10,232 km, an estimated 13 hours 37 minutes in the air. Measured by Pro Flight Search from live flight boards at Houston and Istanbul. Updated 14 October 2026 at 10:37 UTC.

Today, IAH → IST

Wed 14 Oct · local times
  1. 21:15 TK34Turkish Airlines Sched 21:15Departure not confirmed by the board ·

Checked IAH board 05:22 · IST board 13:37

IAH Houston disrupted · +179
IST Istanbul smooth · +5
10,232 km · ~13h 37m est.
dep bank 14:30–21:157x weekly
Under pressure · 1 airline · 7x weekly · nonstop
45 / 100

route health from live IAH and IST delay boards

Median arrival delay is +0 min. 0 of 2 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+0 minacross the last 2 operated legs
Flight time~13h 37mestimated from route distance
Weekly departures7x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Turkish Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Turkish AirlinesTK

Flights TK134 varies Mo Fr · TK34 21:15 daily

History

operated legs · board outcomes
10-13TK34arrived−20
10-12TK134arrived+0

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
IAHHouston +179 min disrupted 🌤 scattered clouds · S 4 kt Full IAH delay board →
ISTIstanbul +5 min smooth 🌫 mostly cloudy · NNE 33 kt Full IST delay board →

Weather lens

Current conditions put the pressure at IAH: 19% odds of a 15+ minute delay and around +0 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Houston to Istanbul route actually runs

Pro Flight Search records official board updates for nonstop IAH to IST flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — Houston (IAH) to Istanbul (IST) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/IAH-IST
How we measure this →

IAH to IST questions

Is IAH–IST running on time right now?

Significant delay risk. The departure side at IAH is the weaker end, route health score 45/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from IAH to IST?

Great-circle distance is 10,232 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 752–907 min gate-to-gate on this route.

How often does IAH–IST fly?

Turkish Airlines runs the route with about 9 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.

What does the route health score measure?

A blend of departure-side delay at IAH and arrival-side delay at IST, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.