Rønne Bornholm, Kastrup Copenhagen, and Oslo Gardermoen are the top airports DAT flies into and out of during the year.
The cheapest domestic DAT flight is flying Kastrup Copenhagen to Rønne Bornholm, which is $116. This round-trip flight has 0 stops. The cheapest one-way DAT ticket is flying from Lampedusa to Catania Fontanarossa. You can expect to pay around $66 per ticket. This flight has 0 stops.
No, there are no DAT flights from Los Angeles. However, DAT does fly from Tromso/Langnes on a weekly basis. You could also fly with Norwegian from Los Angeles as an alternative travel solution.