I have never been a smoker but many friends and my boyfriend have, traveling with them is safe to say.... horrible. Mainly when the flight is delayed and you are checked in, you have no choice but to wait around. It’s like traveling with a school of angry children.
Before we arrive at any airport "Is there a smoking room inside" and they all puff as much as they can.
So here are a list of places you will be safe with smoke. ONLY in EUROPE. With smoking places past security.
Czech Republic - Prague Ruzyne Airport
Belgium - Brussels Airport (BRU)
Denmark - Copenhagen Airport (CPH), Billund Airport (BLL)
England - Bournemouth Airport (BOH), Birmingham Airport (BHX), Bristol Airport (BRS) ,East Midlands Airport (EMA), London City Airport (LCY) , Manchester Airport (MAN), Newcastle-Upon-Tyne Airport (NCL)
Finland - Helsinki-Vantaa Airport (HEL)
France - Marseille Provence Airport (MRS), Orly Airport (ORY)
Germany - Düsseldorf International Airport (DUS), Frankfurt International Airport (FRA), Frankfurt Hann Airport (HHN), , Hamburg Airport (HAM), , Munich Airport (MUC), Weeze Airport (NRN)
Ireland - Dublin Airport (DUB)
Lithuania - Vilnius airport (VNO)
Latvia - Riga international Airport (RIX)
Malta - Malta's International Airport (MLA)
Netherlands-Holland - Amsterdam Schiphol Airport (AMS)
Northern Ireland - Belfast International Airport (BFS)
Poland - Warsaw Chopin Airport (WAW)
Portugal - Faro Airport (FAO)
Scotland - Aberdeen Airport (ABZ),
Spain - Madrid Barajas Airport (MAD)
Great resources and more info from http://www.airportsmokers.com