9w has been having some financial problems lately & have been cancelling some flights....however, i have taken over a dozen 9w flights over the last couple of months & none of them have been cancelled & most of them have been on time....

also, 9w flies into the same terminal as the international flights so you don't have to switch terminals....

finally, there is a 6e, ai & even another 9w flight after the one you are looking to book so in case your flight is delayed/cancelled, you still have 2-3 more options of flying back to del on time to make your international connection....2 hours is more than enough to make a domestic to international connection in del at terminal 3....