Air distance from Ottawa, Canada to Riga, Latvia is 4012.5 Miles (6457.5 Kilometers / 3484.4 Nautical Miles).
Flight duration time from Ottawa to Riga is 8 hrs, 19 mins. This is the In-The-Air flight time. You should also add the taxi time, airport wait times and possible delays due to bad weather, etc. for the total flight duration time.