As a VERY frequent JAX-FLL flier on SW - it will be VERY interesting to see what we end up doing for flights -- we typically pay right about $200.00 RT for our SW flights.
I try to find the cheapest flights I can when I fly - for example - this week - I am flying from JAX - Jackson, MS. Delta is the contract carrier - and the contract fare is over $600.00. SW flies to Jackson, but not from Jacksonville. If they did - I can go to our travel agent and ask her to book me a full fare flight - I work on set project budgets - with set travel allowances. If I can get lower cost fares - I can do more travel without having to request a funding increase.