Starting in 2015, you will only be able to transfer 250,000 Membership Rewards to Delta miles per year and 200,000 Starwood Preferred Guest points to 250,000 Delta miles per year.

Skip this 1 vs 1 comparison and see this post that compares eight Star Alliance award charts side by side.

I've created comparison charts of how many mile a certain award costs with United MileagePlus miles versus the same award with Singapore KrisFlyer miles. Why?

Singapore Airlines miles can be used to book all the same Saver award space that United releases to its non-elite members without any fuel surcharges. That makes it a relevant comparison.
For many routes, the Singapore KrisFlyer program charges fewer miles to book a United flight than United charges to book the same flight.

There is a 20% transfer bonus from American Express Membership Rewards to Hawaiian Airlines miles until June 23, 2014.

This can be a good way to top up your Hawaiian Miles balance if you've recently gotten The Hawaiian Airlines® World Elite MasterCard® with 35,000 bonus miles after spending $1,000 in the first 90 days.

Is this a good deal?

There is currently a 30% transfer bonus on Membership Rewards transfers to Virgin America.

Until April 30, 2014, 200 Membership Rewards transfer to 130 Elevate points. (The normal rate is 200 Membership Rewards to 100 Elevate points.)

What are the sweetspots on the Virgin America chart that might make a transfer worthwhile?

Taking advantage of this transfer bonus is not a good idea if you want to fly Virgin America domestic flights.

Alaska Airlines flies a direct flight between Anchorage and Honolulu.

I love interesting routes from Hawaii--like the Island Hopper across the Pacific--since moving to Oahu, but I think this route has some cool possibilities for everyone, like one vacation that combines Alaska and Hawaii this summer.

Anchorage and Honolulu are 2,777 miles apart. This is a sweet spot on British Airways' distance-based award chart.

Part I Europe
Part II Asia
Part III Africa/Middle East
Part IV Australia/New Zealand
Part V Central/South America

Europe is an absolute award chart bargain compared to Aeroplan's mileage requirement for Asian travel. After Aeroplan's summer 2013 devaluation, its award chart for travel to Asia became very expensive relative to other carriers.

Sadly, United’s recent devaluation and Delta’s unprecedented double devaluation brought Air Canada Aeroplan miles in line with the likes of United and Delta.

Updating this post

There is currently gold mine business class award availability on US Airways flights from the US to southern Europe for this summer.

Award space on US Airways flights is especially advantageous because it means that you can book the space at favorable mileage rates (and no fuel surcharges) with:

US Airways miles
American Airlines miles
United miles (until March 30, 2014)
Ultimate Rewards (until March 30, 2014)
Membership Rewards (until March 30, 2014)

What are the routes? How good is the space? How good is US Airways Business Class?

The newest Membership Rewards airline partner is Emirates Skyward miles.

American Express Membership Rewards transfers to British Airways will come with an automatic 20% transfer bonus from now through December 31, 2013.

It's transfer bonus season with Membership Rewards.