What is the cheapest airline for domestic flights in US?

Question

What is the cheapest airline for domestic flights in US?

Answer 1

Generally, they all price-match each other, but as each individual flight starts to sell out, prices for that flight increase.

So the answer is, the one who has the emptiest flight on the route and days that you want to fly.

Answer 2

here are a few..

allegiant

southwest

frontier

star alliance

spirit

airtran

out of those i spirit is probablly the cheapest, but i really like southwest.

Answer 3

One of them would be Southwest, but it is regional.

Answer 4

try going to http://www.18ktravel.com and do a search when you do that it will give you a list of competing airlines.

Answer 5

The is no one "cheapest." It depends at the very least on where you're flying from and to. It may also depend on season, day of week, time of day, and how far ahead you book.