TLDR: United matched the Delta Honolulu fare that we mentioned a few days ago, the UA fare is slightly cheaper, and the DL fare price dropped by about -$10 to compete.
United and Delta have round-trip flights from Dallas (DFW) to Honolulu (HNL) for $363-$376 with a connection. Flights August to December. Departures on Monday, Tuesday, Wednesday, Thursday, and Sunday. No Fridays or Saturdays. Extended weekends available. Origin/Destination reversible. No Christmas dates available.
A Carry-on bag and also a personal item is allowed for free on Delta. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
Read More Cheap Flights: Dallas to/from Honolulu, Hawaii $363-$376 r/t [August-December] (No Christmas) – United / Delta