Turkish Airlines (TK)

Turkish Airlines (TK/THY) is a full-service network airline based in Turkey, founded in 1933. It operates from its hub at IST, where much of its connecting network is built.

It is a member of Star Alliance, one of the major global airline alliances, so its frequent-flyer program and network connect with other Star Alliance carriers — useful when you need a through-ticket or want to earn and use miles across partner airlines.

As a full-service carrier, its fares generally bundle more into the base ticket than a budget airline, but the exact baggage allowance, seat selection and change rules still depend on the fare type you pick, so confirm the conditions of your specific fare before you pay.

When flying Turkish Airlines, book under the airline code TK, check the carrier's current baggage, check-in and travel-document rules on its own website, and allow enough time at IST if you are connecting.