Most travellers find the cheapest return flights to Donegal when choosing a flight departing in March.
Most flyers found that booking flight tickets 37 days in advance of their planned departure date is, on average, the best time to get cheap flights to Donegal.
In general, booking your departure to Donegal for a Tuesday represents the best deal on airfare. Try to avoid a Saturday departure to stay away from the highest prices.
Generally, when visiting Donegal, morning flights represent the best value. evening flights are likely to have higher prices.