Transavia is a Dutch low cost airline which has an interesting network and hubs in both the Netherlands and France. On Tuesday, September 18, they will publish their summer 2019 schedule. That's always a good way to grab low ticket prices - although you should note that Transavia has frequent sales where ticket prices may be even lower. But if you don't mind booking well in advance, this is an excellent way to make your summer holiday cheaper, or to plan some brief trips over the rest of the season.
One of the most interesting new destinations is Beirut, although Transavia already starts flying there from this autumn. Ticket prices can be very low for this 4 hour flight. Do yourself a favour and book an emergency exit seat - they are very fairly priced with this airline. Transavia is a 'low cost' airline but it beats many of the competitors in that segment in terms of service, punctuality and pricing for additional items such as premium legroom seats.