Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Donegal as you normally would.
Denver Intl
Donegal
2 stops
27h 50mDonegal
Denver Intl
2 stops
39h 39mMultiple Airlines
Denver Intl
Donegal
2 stops
27h 50mDonegal
Denver Intl
2 stops
39h 39mMultiple Airlines
Yes, there are multiple flights from Denver to Donegal for under $1,300. The cheapest flight booked recently is on Multiple Airlines for just $1,231, but on average you can expect to pay $1,231.