There are zero airlines offering flights to Dallas. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly.
Dallas Love Field Airport is just one of the airports in Dallas. If you're not set on a specific airport, try changing your search from Dallas Love Field Airport to Dallas to see a broader range of flights – they might be cheaper.
If you're planning on going to Dallas during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.