Istanbul to Houston (IST–IAH) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
IST–IAH is served by 1 airline with nonstop service. Turkish Airlines leads the route. The flight covers 6,357 miles in approximately 12h 22m. Beyond nonstop, 36 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| TK Turkish Airlines Also: 6E, PK, TG | 12 | 789 | 12h22-13h | – | Star Alliance | 6E, PK, TG |
Weekly Schedule Pattern
Connection Landscape
Travel Essentials
IST: +03 · IAH: CDT
When it's 6:00 PM in Istanbul, it's 10:00 AM in Houston.
Turkish passport holders need a B1/B2 visa to enter the United States. Turkey is not part of the Visa Waiver Program, so ESTA is not an option. Apply through the US embassy or consulate in Turkey. The process includes an online DS-160 form, a USD 185 application fee, and an in-person interview. Wait times for interview appointments vary by location and season. Passport must be valid for at least 6 months beyond the planned stay.
Bring proof of ties to Turkey (employment, property, family), a travel itinerary, and evidence of funds. Approval grants a visa valid for up to 10 years with stays of up to 6 months per entry.
Istanbul Metro M11 Gayrettepe–İstanbul Havalimanı line connects the airport to the broader metro network; from Gayrettepe (Mecidiyeköy/Levent area) the journey is about 35 minutes (₺60–70 with Istanbulkart). The line runs roughly 5am to midnight.Havaist express buses serve Taksim, Kadıköy, and other major hubs (₺50–80, 45–90 minutes depending on traffic). Taxis use a meter; expect ₺400–600 from Taksim or Sultanahmet. The airport is 35km northwest of the city; traffic on the O-7 motorway can be severe during peak hours.
No direct rail from IAH. The METRO bus 102 (IAH Express) runs to downtown Houston's transit center (60–90 min, $1.25). Taxis to downtown Houston cost $50–70. Ride-hails pick up at the designated Rideshare zones outside baggage claim on the lower level.IAH has five terminals (A–E) connected by an underground tunnel with trams. Terminal D handles international arrivals. Rental car agencies are in a consolidated facility adjacent to Terminal C; a free IAH Connector bus runs between terminals and the rental car center. The Galleria / Uptown area costs $35–50 by ride-hail.
Humid subtropical climate. Hot, humid, and wet for much of the year. Summers are brutal (33–38°C) with high humidity and near-daily afternoon thunderstorms. Severe storms with hail and high winds regularly cause ground stops from April through September. Houston's flooding risk is significant. Heavy rain events, including tropical system remnants, have flooded airport roads, cutting off surface access even when the airport itself remains operational.
Winters are mild (5–18°C) with occasional ice storms. These are rare but highly disruptive when they occur. Hurricane season (June–November) requires monitoring for Gulf storms. October through March has the best flying weather.
IST–IAH Quick Facts
Frequently Asked Questions
Flights from IST to IAH
İstanbul Airport (IST) and George Bush Intercontinental Airport (IAH) are connected by nonstop service from Turkish Airlines. With 36 weekly departures, this is a heavily served route.
IST to IAH Flight Duration and Schedule
Nonstop flight time from IST to IAH ranges from 12 hours 22 minutes to 13 hours 20 minutes. The route covers a distance of 6,357 miles (10,231 km). There are approximately 36 weekly flights outbound and 37 return, totaling 73 flights per week in both directions.
Connecting Options and Alternatives
36 one-stop connections are available, with the fastest taking approximately 14 hours via LGG. Two-stop connections are also available via intermediate hubs.