Loganair is raising capacity for key Scottish airports in the second tranche of its summer 2020 schedule.
Seat capacity from Edinburgh is going up by 41% over this year and 21% from Glasgow.
Much of the increases come from deploying larger aircraft on Highlands and Islands services, and the addition of East Midlands services from both airports following the withdrawal of Flybe from the routes in October.
New Loganair routes include regional jet flights from Edinburgh to Hanover and Esbjerg.
Larger 70-seat ATR72-600 aircraft will be deployed on routes to Orkney and Shetland from Aberdeen, Edinburgh and Glasgow.
The Glasgow-Benbecula route will be upgraded to jet aircraft year-round.
Better flight times for business travel will be introduced on Glasgow-Cardiff and Glasgow-East Midlands routes.
More flights and seats will be provided on routes from Glasgow to Newquay, Donegal and Islay.
Loganair chief executive Jonathan Hinkles said: “Today’s announcement represents a significant investment in our aircraft and route networks in our heartlands of Glasgow, Edinburgh and Aberdeen.
“I’m sure that the upgrades to the aircraft our Highlands and Islands routes will be well received by island travellers, and the new international services, improved timetables and extra flights on many routes from Glasgow and Edinburgh will provide new flexibility for both business and leisure travellers alike.”