This 50k Hilton offer has expired. Check out the best current travel credit card sign up offers here.

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Hilton is increasing the category of 18 hotels and decreasing the category of two hotels for bookings effective July 8, 2015.

If the hotel you want is going up in category in two weeks, book the hotel now to lock in the lower, current rate. Your stay can be through July 7, 2016 at current rates.

These are the hotels getting cheaper.

This 50k Hilton offer has expired. Check out the best current travel credit card sign up offers here.

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Hilton is increasing the category of 18 hotels and decreasing the category of two hotels for bookings effective July 8, 2015.

If the hotel you want is going up in category in two weeks, book the hotel now to lock in the lower, current rate. Your stay can be through July 7, 2016 at current rates.

These are the hotels getting cheaper.

Today only (June 24): Frontier is offering a fare sale for Summer and Fall travel. Fares start at $29 one way!

The sale is valid for bookings made by 11:59 PM ET today (June 24) for domestic, nonstop travel between August 22 and October 20, exclusing Friday and Sunday flights.

Here is the sale page and restrictions.

Today only (June 24): Frontier is offering a fare sale for Summer and Fall travel. Fares start at $29 one way!

The sale is valid for bookings made by 11:59 PM ET today (June 24) for domestic, nonstop travel between August 22 and October 20, exclusing Friday and Sunday flights.

Here is the sale page and restrictions.

Update 8/19/15: This is dead. Airbnb removed the option. Now you have to do this to avoid the 3% conversion fee.

Right now I'm in Eastern Europe, visiting the capitals of Finland, Estonia, Latvia, and Lithuania for a week each. Then I'll head to Belgrade, Serbia for around a month. For all of these stays, I'm staying at Airbnb properties. Check out "I’ve Been a Nomad for Eight Months.

Air Asia, a Southeast Asian low cost carrier, is having a fare sale starting at $4 one way. Air Asia and its affiliates serve 121 destinations in 22 countries.

You must book by June 28 and fly between February 15 and August 31, 2016 (and yes, you can book August 2016 today.) The discounted routes are listed here and start at $3.

Not all days next year are at the advertised price, but many are. Head to airasia.com and search.

Make sure to select the local currency of the departure airport for the cheapest price.

Update June 24: United added this promo to its promo page. Book by July 6.

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United is offering up to a 25% discount on roundtrip awards to Hawaii for travel this Summer and Fall!

United cardholders get a 25% discount and pay 33,750 United miles roundtrip to Hawaii. Non-cardholders get a 20% discount and pay 36,000 United miles roundtrip. Full price is 22,500 United miles one way in economy between Hawaii and the continental United States, Alaska, or Canada.

The sale is valid:

for roundtrip or open jaw awards.

Generous reader Lien is donating two United Club passes that expire October 31, 2015–in about four months–to one lucky winner.

United has lounges all over the world. The clubs are a pleasant place to relax in a comfortable chair, use free wifi, and enjoy free snack and drinks. Here are the amenities. One-time entry goes for $50, so this giveaway could be worth up to $100.

There are two ways to enter this contest:

Comment on this post for a chance to win the passes. Include your real email address while commenting, so I can contact the winner.

This golf benefit expires July 23, 2017.

The Citi Prestige® Card offers cardholders three free rounds of golf per calendar year at over 2,400 public and private courses.