Istanbul has two international airports on opposite sides of a city of sixteen million, separated by a strait. Most guides mention this as a footnote — check which one your flight uses. It deserves more than a footnote, because a Turkey itinerary can easily put you in one and require you at the other, and no airline system treats that as a connection.
Here's how the two sit, how you actually get between them, and one clause in the passenger-rights regulation that changes who pays for it.
The two airports
Turkish Airlines principally operates from Istanbul Airport (IST); AJet and Pegasus principally operate from Sabiha Gökçen (SAW), with some carriers holding a limited presence at the other.
IST sits northwest of the city on the European side. SAW sits southeast, on the Asian side. This is an operational pattern rather than a regulatory assignment, so it isn't absolute — but it explains the common trap: a transatlantic arrival lands at IST, and the cheap onward domestic fare turns out to depart from SAW.
Getting between them
The road distance between IST and SAW is roughly 78 km, with driving time typically around 55 minutes to an hour and a quarter depending on traffic.
That figure is an approximation from route data rather than a published operator statement — neither airport publishes a distance or a journey time for the transfer, which itself tells you how much of an official service this isn't.
The options are a direct shuttle bus, a metro combination (the M11 from IST toward the city, then onward to SAW), a taxi or ride-hail, or a private transfer. Timings vary widely between them, and none is published by either airport as an official inter-airport product.
Two things follow. Traffic is the dominant variable rather than distance — the same road crossing at the same distance behaves completely differently at different hours. And there's no published fare table: neither operator publishes a tariff for any of these options.
The point nobody makes: this transfer exists in no airline system
A connection inside one airport is something an airline understands. It has a code, a minimum time, a transfer desk and a process for when it fails.
A movement between IST and SAW has none of that. No airline sells it, no schedule accounts for it, no system knows you intend to make it. Whatever appears on two boarding passes, you are landside, on public roads, in a city with serious traffic, entirely on your own timetable.
There is one situation where the transfer stops being your problem, and it's written into the regulation.
Where more than one airport serves a city or region and the carrier re-routes a passenger to an alternative airport, the carrier must cover the passenger's transfer from that alternative airport to the one on the original reservation, or to another nearer destination the passenger accepts.
Istanbul is exactly the case that clause was written for. If an airline cancels your flight into IST and re-routes you into SAW, the cost of getting from SAW to IST is the airline's, not yours. Most passengers in that position pay for their own taxi without knowing the obligation exists — and the same is true in reverse.
Note the boundary precisely: this applies when the carrier re-routes you. It doesn't turn a self-booked itinerary that happens to use both airports into the airline's responsibility.
Which airport is on the ticket
Both airports are "Istanbul" in casual speech and in a lot of booking interfaces, which is how people end up at the wrong one. The codes are the reliable identifier: IST for Istanbul Airport, SAW for Sabiha Gökçen. A booking confirmation always carries the code even when the display name doesn't distinguish them.
How the airport pairing interacts with the internal legs and the international flight already booked is a connection each of these guides makes only half of. Turkey, Worked Out makes the whole one.
FAQ
How far apart are Istanbul's two airports?
Roughly 78 km by road, typically around 55 minutes to an hour and a quarter driving depending on traffic — an approximation from route data, not a published figure. Traffic matters more than distance.
How do I get from IST to SAW?
A direct shuttle bus, a metro combination via the M11, a taxi or ride-hail, or a private transfer. Neither airport publishes this as an official service or lists a fare.
Is the transfer treated as a connection?
No. No airline sells it and no schedule accounts for it — you are landside on public roads, on your own timetable, whatever your boarding passes say.
What if the airline sends me to the wrong airport?
Then it pays. Where a carrier re-routes a passenger to an alternative airport serving the same city, it must cover the transfer to the airport on the original reservation. This applies to carrier re-routing, not to itineraries you booked that way yourself.
Which airlines use which airport?
Turkish Airlines principally IST; AJet and Pegasus principally SAW. It's an operational pattern, not a rule — check the airport code on the booking rather than the airline.
