If you searched for "HVİST-11," you are looking at a HAVAİST airport shuttle bus that runs to Sultanahmet, and it is not the M11 metro. The two share the number 11 and little else: one is a road coach to the Old City, the other is a rail line to Gayrettepe. That single mix-up sends travelers to the wrong platform at Istanbul Airport (IST) every day.
The confusion got worse in 2026, because HAVAİST has been renumbering its lines from the old HVİST-xx codes to a newer HVL-x format, and the switch is only half done. The operator's own system still lists some routes under both codes at once, so airport signs, map apps, and guides often disagree. This guide sorts out what each code means and which line you actually need. It also explains why the M11 metro fare works differently from the flat-fare city lines.
Is HVİST-11 the same as the M11 metro?
No. HVİST-11 is a HAVAİST shuttle bus. It runs direct from IST to Çatladıkapı, about a 7 to 12 minute walk from the Blue Mosque and Hagia Sophia. The M11 is a metro line: driverless rail that reaches Gayrettepe in roughly 30 minutes, with only a handful of stops before the interchange there.
There is a recent twist worth knowing. HAVAİST pulled the direct Sultanahmet bus in January 2026, then brought it back on 17 May 2026 with a new stop at Çatladıkapı Nikah Sarayı, opposite the wedding hall and steps from the tram. The one-way fare sits at about ₺380. If the direct coach is not running when you travel, the fallback is the HVL-1 line to Aksaray and the T1 tram two stops toward the Old City, or the M11 metro to a tram link, which skips road traffic entirely.
So HVİST-11 is a bus and M11 is a rail line, and they run to different places for different fares. The letters in the code tell you the mode before you ever check the map.
Why HAVAİST codes changed from HVİST to HVL
HAVAİST is the branded coach network at Istanbul Airport, and it recently reworked its line numbers. The Taksim coach that ran for years as HVİST-16 now shows as HVL-9, and the Aksaray line became HVL-1. The routes are mostly the same, but the labels changed, and not every line switched at once.
Worth stating plainly, because a lot of guides get it wrong: "HVL" is not a map-app typo for "HVİST." It is the operator's own new code, and it appears in the official HAVAİST schedule data alongside the older HVİST numbers still in use. That mixed state is why apps and airport signage disagree, and why the same coach can show two different codes. These are the current codes for the routes most visitors use:
- HVL-9 to Taksim (formerly HVİST-16). About 90 minutes, stopping at Beşiktaş, Zincirlikuyu, and 4. Levent before ending in front of Point Hotel on Taksim Square.
- HVİST-11 to Sultanahmet (Çatladıkapı). The direct Old City coach, back in service since May 2026 and still listed under its older HVİST code.
- HVL-1 to Aksaray Metro (formerly HVİST-12). A handy backup for the Old City, with the T1 tram reaching Sultanahmet in two stops from Aksaray.
- HVL-6 to Kadıköy. The Asian-side coach, around 120 minutes.
- HVİST-13 to Sabiha Gökçen (SAW). The airport-to-airport coach, also still under its old code.
One common mistake worth naming: people look for a separate "Beşiktaş bus" and hunt for a code that does not exist on its own. Beşiktaş is a stop on the Taksim line (HVL-9), not a standalone route. If a guide lists it as its own numbered line, that guide is out of date.
As of mid-2026, fares on the HAVAİST coaches run from roughly ₺380 to ₺480 depending on the destination, with the Sultanahmet line near the bottom at about ₺380 and the Taksim line around ₺426. You pay by contactless bank card, the Havaist app, or a QR code, so have one of those ready rather than assuming your İstanbulkart will cover it, and prices climb with inflation, so confirm the current fare in the app before you board.
Which line do you actually need from Istanbul Airport?
Start with your destination, then read the code. The HAVAİST coaches leave from floor -2 of the terminal, reachable by lift and escalator from arrivals.
- Taksim, Şişhane, and the Beyoğlu hotels: the HVL-9 coach at about 90 minutes, or the M11 metro to Gayrettepe and one metro change.
- Sultanahmet and the Old City: the direct HVİST-11 coach to Çatladıkapı, back in service since May 2026, or HVL-1 to Aksaray plus the T1 tram as a backup. For a rail-only trip, the M11 links to the wider metro and tram network toward the Old City.
- Kadıköy and the Asian side: the HVL-6 coach, or the M11 metro connecting to Marmaray under the Bosphorus.
- Fastest to the European center without traffic: the M11 metro every time, at roughly 30 minutes to Gayrettepe, because rail ignores the road jams that slow every coach at rush hour.
For a deeper breakdown of the coach network, see our HAVAİST bus routes and fares guide. If you would rather ride rail all the way in, the IST to Sultanahmet by metro guide walks through the transfers.
How the M11 metro fare works, and why it surprises people
Like the Marmaray line under the Bosphorus, the M11 charges by distance instead of a flat fare. On the regular city metro you tap once and pay the same price no matter how far you ride. These two lines bill you for the stretch you actually travel, and the difference catches airport arrivals off guard at the exit.
When you tap in at the airport, the turnstile places a hold of about ₺66.54 on your İstanbulkart, the maximum end-to-end fare. When you tap out, the system charges only for the distance you rode and returns the rest. The full airport-to-Gayrettepe ride settles at roughly ₺38.49 with an İstanbulkart as of mid-2026, and shorter hops cost less. Paying with a contactless bank card instead can price the ride a little differently. Travelers often tap out expecting the whole ₺66.54 to be gone, then find most of it refunded a moment later. If your card does not seem to refund, look for the top-up and refund machines near the gates.
Timing matters too, because the M11 does not run all night. Trains start around 06:00 and the last departure from Gayrettepe back toward the airport is near 00:40. They come every four to six minutes during the morning and evening peaks and every eight to ten minutes off-peak. The line closes for a few hours after midnight, so a very late landing means a HAVAİST coach, a taxi, or a booked transfer rather than the train.
An İstanbulkart is the easy way to ride the M11, and the same card covers the metro, tram, ferries, and municipal buses. Our İstanbulkart from the airport guide shows where to buy and load one inside the terminal. You can also read the full airport metro overview for station-by-station detail.
What about the H buses (H-1, H-2, and the rest)?
The H-series buses are run by İETT, the city bus operator, not by HAVAİST. Codes like H-1, H-2, and H-3 mark municipal routes that serve the airport and its surrounding districts. They are the cheapest way out of IST and also the slowest, with frequent stops and no luggage racks built for airport loads.
You pay for these with an İstanbulkart, tapping for each ride. Most trips to the historic center need a transfer, so budget for two fares rather than one, though the İstanbulkart transfer discount trims the second tap if you change within about two hours. Some İETT routes also keep running overnight, which covers the window when the M11 is closed. For a short hop to a nearby district on a tight budget, an H bus does the job. For a direct run into the tourist core with bags, the HVL coaches or the M11 metro save real time.
If you are arriving late, traveling with family, or carrying heavy luggage, a booked door-to-door car removes the code-guessing altogether. A private transfer through GetTransfer.com meets you at arrivals and drives straight to your address, which is often worth it after a long flight even when the metro is cheaper.
How to tell HAVAİST, İETT and metro codes apart
Match the code to the mode. An HVL or HVİST code is a HAVAİST coach on the road. An H code belongs to İETT, the municipal bus operator. Anything starting with M, including M11, is metro rail. Havabüs is the odd one out: it is the coach brand at Sabiha Gökçen (SAW), not Istanbul Airport, so do not look for it at IST.
Because the HVİST-to-HVL switch is still in progress, check the live line in the Havaist app or a map app right before you travel, and trust the airport's own signage over older printed guides. Official schedules and fares are published by Istanbul Airport and the operator at hava.ist.