US Airways--with absolutely no notice--made some award chart changes today. The big change to Saver award prices is that a roundtrip in business class to North Asia is now 110k miles roundtrip.

US Airways' definition of North Asia includes:

China
Hong Kong
Japan
Macau,
South Korea
Taiwan
and a bunch of 'stans

Business class awards to North Asia had been under-priced at 90k US Airways miles roundtrip, and many people in this hobby had taken advantage with awards that included a stopover in Europe and Asia in business class.

Until April 13, 2014, US Airways is offering a bonus of 100% on sharing between 30,000 and 50,000 miles between Dividend Miles accounts.

The US Airways Share Miles promo is typically the best mileage purchasing offer of the year.

Sharing miles works out to buying miles for 1.13 cents each.

Get 40,000 bonus miles after first purchase on the US Airways MasterCard! Click here for details.

The notes at the bottom of the US Airways award chart have some bad news: US Airways is losing four partners this year.

On Saturday, I explained Where to Search for Award Space on All 26 of US Airways’ Partners.

Since US Airways joined the oneworld Alliance on March 31, I think they have the most valuable miles of any airline. The three main reasons:

The world's cheapest award chart.

US Airways joined oneworld today, March 31, 2014.

US Airways leaves the Star Alliance Sunday (3/30/14) and enters the oneworld alliance Monday (3/31/14) as part of its ongoing integration with American Airlines.

Overall, this news is mixed because some awards are more easily booked with Star Alliance partners and other awards are more easily booked with oneworld partners.

Here are the awards that are easier to book in the next two days and the awards that are easier to book next week with US Airways miles.

One partner that US Airways loses on Sunday is Lufthansa, the German flag carrier, which is currently offering incredible summer award space

On the US Airways award chart today, I noticed a minor change as part of the US Airways / American Airlines integration.

Did you catch it?

On the US Airways chart, the word "Envoy" has been replaced with "Business Class."

US Airways had previously referred to its International Business Class as "Envoy" (and it still does on other pages), but it looks like that name will disappear during the integration.

This is semantics, since the Envoy / Business Class will still be a great product--at least on the A330s where it is completely flat--but a far bigger change is coming

US Airways Premier World MasterCard with 40,000 bonus miles after first purchase to book these Star Alliance and oneworld partners

Earn 40,000 bonus miles after your first purchase and payment of the $89 annual fee*
First checked bag FREE on eligible bags for you and up to four companions on domestic US Airways operated flights
One companion certificate good for up to 2 guests to travel with you on a US Airways

Per the email I received last week, US Airways is again offering up to a 100% bonus on purchased or gifted miles. This "Mystery Bonus" promotion is a slight variant from previous iterations, as the bonus you receive varies by individual frequent flyer account. You might receive a 25%, 50%, 75%, or 100% bonus on purchased and gifted miles.

US Airways frequently runs promotions offering bonuses to buy its miles, including one in December of last year. The deal is hardly a new proposition, especially if you receive an inferior 25%-75% offer like I did.

Update 4/14/14: US Airways has increased the price of its awards to North Asia in business class to 110k miles roundtrip.

In December, I compiled Comparison Tables of United, Delta, US Airways, and American Airlines Award Charts to show which program had the cheapest awards in each cabin to every country you want to visit.

With Delta announcing a new award chart that takes effect for awards booked January 1, 2015, I have updated the tables for economy and business class.

There are a few ways to use these charts.

Figure out which miles to earn for your next big