Southwest Airlines offers unprecedented service to all once you finalize the reservation to travel to various destinations around the world. The airline has a well-connected networking system, which provides the scope to find the best deals and offers in the booking that you make for any trip that you intend to take. 

If you would like to get an understanding of; what airports does Southwest fly into in Hawaii?; the entire list is given here to make an understanding of and accordingly plan your trip with Southwest Airlines to Hawaii. 

List of the airports in Hawaii Southwest Airlines flies across to:

There are five major airports in Hawaii where all the arrivals and departures of Southwest Airlines occur. The list of the same is given here:

Honolulu International Airport, Oahu.
Kahului, Maui.
Kona, Island of Hawaii.
Lihue, Kauai. 
Hilo, Island of Hawaii.
Does Southwest offer nonstop flights to Hawaii?

Yes, the airline does offer Southwest nonstop flights to Hawaii from various cities, the details of which are given here for you to make reference of:

Oakland
Los Angeles
Las Vegas
Sacramento 
Long Beach
What are the tricks to booking cheap flights to Hawaii with Southwest Airlines?

You can follow the tips given here, which would help you to reserve a cheap flight with the airline to Hawaii:

Make an advance booking: To get the best deals on flights, you can make a reservation with the airline well in advance so that you find the most beneficial ticket pricing with the airline. The booking can thus be made 3 to 4 months before the scheduled departure of the flight. 
Check the low-fare calendar: The low-fare calendar with Southwest Airlines can be checked through if you would like to make a booking with the airline. A comparison of the same would help you to find the best deals in accordance with the needs you have. 
Reservations are made using low-valued currency: All the reservations that are made using low-value currency tend to help you maximize the average margin in the ticket purchased. It would help you to make the booking at much lower rates than the actual charge.
Off-season booking: All the bookings sine during the off-season tend to help you find cheap flights as per the requirements you have. It is because the average demand for travel during the off-season is less, thus causing a decline in the ticket fare price with Southwest Airlines.