How many hours will it take to travel from lagos to atlanta,georgia by air direct flight?

Also,how many hours will it take to travel from atlanta,georgia to ottawa,canada by air,direct flight.How many hours will it take to travel from lagos to atlanta,georgia by air direct flight?That all depends on how many stopovers there are and if there are any delays. If it's a direct flight it should not take any longer than 12 hours. If it's not in can take a day.