Discount Vouchers and Codes - Other European Airlines
 

Here are a couple of discount vouchers and codes for reductions with some of the other European airlines which don't have their own forum.

First up is airBaltic:

Visit Riga, the most hip city in the Baltics and discover 800 years of culture with a special offer for PayPal users. Book tickets until 30th June and get £7 discount.

Use code: PAY10
Book from 23.06.2015 - 30.06.2015

Secondly, Monarch is offering £10 off certain flights:

£10 off per person, per return flight to Egypt (Sharm El Sheikh & Hurgada). Turkey (Antalya, Dalaman & Bodrum). Cyprus (Lanarca & Paphos). Greece (Rhodes & Crete)

Use code: PALJUN15
Travel selected dates from 23.06.2015 - 22.10.2015

If you're under 26, campaign code UNDER26 significantly reduces the price of many of Norwegian's intra-European routes.

It also reduces the surcharge for booking a flight with a connection (layover) from [segment1price + surcharge + segment2price] to [segment1price + smallerSurcharge + segment2price].

Not sure about how much less smallerSurcharge is, but you can completely remove the surcharge by booking two one ways, at the risk of them not rebooking you if/when you miss a connection.