Originally Posted by
sipples
Pegasus Airlines offers service IST to ESB but (apparently) not the other way. I found a US$80 one way fare with them.
Wikipedia maintains a list of
all carriers that serve ESB, and it includes several European discount carriers from a few different gateways.
There is
train service between Istanbul and Ankara. Scheduled time each way is 6 hours or less.
There's also a lot of bus service.
Careful - I believe the Pegasus flight is from/to the second Istanbul airport which is on the asian side and you will need to leave schedule a good two hours to transfer there from Ataturk where most international (and all Skyteam) flights arrive.