JetBlue, my favorite coach cabin in the world, and Southwest are both having one day sales that end today, May 15, at 11:59 PM ET.

First the JetBlue sale: Here’s a complete list of the city pairs with fares on sale. If you want to fly one of those routes between May 22 and June 21, the deals are generally pretty good. Click on a city pair for black out dates and day-of-the-week restrictions. This sale is valid on oneways and roundtrips.

If you see a city pair you like, simply go through the normal booking process at jetblue.com, the sale fares will be included in the search results. Here’s a really good deal I found:

It’s common to find a deal like $80 roundtrip from LAX to Las Vegas, but from Burbank that’s unheard of. Usually a roundtrip from BUR to Las Vegas is at least $160.

Southwest is also running a one-day sale today, but of a very different kind. The Southwest sale is available on only seven upcoming dates:

  • May 22
  • May 30-31
  • June 5-6
  • July 4-5

On those dates, any oneway or roundtrip Wanna Get Away fare is 35% off. (The offer excludes about a dozen routes, see the full T&C here.) So if you can travel on those dates this is a fantastic deal. It’s an especially fantastic deal because of Southwest’s refund policy and Rapid Rewards program.

Southwest lets you cancel a cash reservation and be credited back a credit for use on future Southwest flights in the amount of your ticket price. Southwest lets you cancel a points reservation by refunding the taxes and fees and redepositing the points. Neither type of cancellation incurs any fees.

That means if you already have travel planned on Southwest for one of the promo days, you can cancel that leg, and rebook at the new lower price! The cancellation policy and promos like this are the reason I advise that if you know you want to fly a Southwest flight in the future with cash or points, book it immediately. If prices then rise, you locked in the best deal. If prices fall, you can cancel and rebook penalty free.

This is also a fantastic deal for those of us with a stash of Rapid Rewards points. Why? Rapid Rewards are a fixed value program, so when dollar fares fall, the number of points needed to book falls!

How do you book with this promotion? It is not as straight forward as JetBlue’s promotion. Once you’ve selected flights on a 35% off day, you need to type in the promo code SUMMER12 at the checkout screen.

I would love to do a dummy booking as an example, and so I could add screen shots. But southwest.com’s booking engine has been down for over an hour.

Two different promos, two different deals, either could save you $100 or more if they match your travel needs.

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