Cheap flights from Ottawa (YOW) to Washington, D.C. (DCA)

Toronto – Halifax from $208 Ottawa – Cancún from $441 Vancouver – Victoria from $100 Montreal – Liberia from $381 Toronto – St. John s from $235 Halifax – Paris from $588 Montreal – Lisbon from $662 Calgary – Halifax from $351 Vancouver – Yellowknife from $384 Montreal – Cozumel from $449 Quebec City – Lisbon from $750 Ottawa – Lisbon from $770 Vancouver – Paris from $677 Montreal – Tokyo from $1,244 Winnipeg – Reykjavik from $901 Montreal – Chicago from $388 San Juan – Toronto from $303 Atlanta – Calgary from $359 Montreal – Fort McMurray from $623 Toronto – Podgorica from $1,319 Prince George – Terrace from $398 Halifax – Glasgow from $753 Montreal – Santiago de Querétaro from $738 Quebec City – Montreal from $490 Ottawa – Calgary from $208 Regina – Toronto from $188 Halifax – Deer Lake from $375 Saskatoon – Vancouver from $166 Vancouver – Comox from $104 Montreal – Calgary from $281 Saskatoon – Toronto from $229 Montreal – Vancouver from $303 Abbotsford – Calgary from $124 Abbotsford – Kelowna from $119 Toronto – Saskatoon from $229 Halifax – Hamilton from $219 Montreal – Punta Cana from $483 Halifax – Toronto from $224 Toronto – Fort Lauderdale from $228 Ottawa – Winnipeg from $246 Saskatoon – Edmonton from $210 Kelowna – Abbotsford from $113 Regina – Edmonton from $187 Victoria – Kelowna from $192 Saskatoon – Minneapolis from $292 Montreal – Lower Prince's Quarter from $399 Abbotsford – Victoria from $165 Calgary – Abbotsford from $122