Southwest does have excellent change policies and I have changed flights many times HOWEVER one thing you need to keep in mind is that your flight credits no matter when you flight is scheduled for are only good for one year from date of booking. In May of 2020, I booked flights for November, assuming the pandemic would be over by then....obviously not so much, when it became apparent we would not be going in November I pushed them to February 2021, no problem. However, when we realized we wouldn't be able to go in February when the next block of flights opened up I tried to push them as far out as I could to July but they told me I couldn't go past my date in May. They don't care that I physically can't get across the border to take my flight. The will not extend flight credit after one year. From what I have read, there is a voucher that you can convert a expired flight credit to at a cost of $100 per but it doesn't seem to be a written in stone policy. I will just be hoping for the best when I call after they expire. I would still stay with Southwest because of the flexibility, the reasonable flights and the two bags free! I need that for sure, I have one whole bag for ears alone