There are a lot of reasons to use an Award Booking Service, like the MileValue Award Booking Service. One great reason is because you have miles in several accounts and want to use the most efficient type for the trip you have in mind. Different miles have different best uses.

Recently I was contacted by a friend who had mid-six-figure account balances in his American, United, and Delta accounts. He wanted a simple open jaw trip to Europe in economy class. From Washington-Dulles to Nice and returning from London to Dulles.

Below is the email I sent to him.

Asiana recently announced that starting on July 22, it would be flying a new 777-200ER daily on its New York-JFK <-> Seoul-Incheon route with the following flight times.

OZ222 departs Seoul-ICN at 10:00 and arrives New York-JFK at 11:00 AM (same day)

OZ 221 departs New York-JFK at 1:00 PM and arrives Seoul-ICN at 4:10 PM (next day)

This is big news because the three-cabin Asiana 777-200ERs have a fantastic first class.

At MileValue, we constantly champion the free oneway on award tickets. Adding a free oneway is possible (to varying degrees) using all four legacy carrier's miles. For more information, make sure to check out Scott's comprehensive posts below:

Master Thread: Free Oneways on United Awards
Master Thread: Free Oneways on American Awards
Master Thread: Free Oneways on Delta Awards
Master Thread: Free Oneways on US Airways Awards

Free oneways are great, but nothing gets us more excited than "negative" awards.

Update 3/6/14: This post is outdated. See Master Thread: Holds on United Awards

The ability to hold awards is extremely valuable especially at our increasingly popular Award Booking Service. Our clients might need to transfer their Chase Ultimate Rewards or American Express Membership Rewards into their frequent flyer accounts. They might need to purchase additional miles to reach the next award threshold or just simply firm up their hotel plans. Having a few days to hold an award is critical in these cases.

Of the four legacy carriers, American Airlines is the most generous.

Searching for award space can often be an exercise in frustration. The dates you want don't have availability and premium cabin seats are often scarce. There is nothing in the world, however, more frustrating than phantom availability. You think you've found your dream trip only to have the rug yanked out from under you.

We recently received a request through the Award Booking Service where this came into play. A family of four was looking to travel from New York to Johannesburg, Africa in July using their US Airways miles.

American Express Membership Rewards are valuable because of their ability to be transferred to dozens of partners. But they have a glaring weakness: they don't have a top-tier Star Alliance transfer partner--US Airways or United.

Membership Rewards can be transferred to Singapore, which is great because this is the only way to get into Singapore business or first class.

Membership Rewards can also be transferred to Aeroplan and ANA.

Hey! You're reading an outdated Free First Class Next Month series. Check out the latest version published in April of 2015 here.

This is the seventeenth post in a monthlong series that started here. Each post will take about two minutes to read and may include an action item that takes the reader another two minutes to complete. I am writing this for an audience of people who know nothing about frequent flier miles, and my goal is that by the end, you know enough to fly for free anywhere you want to go.

For many people, the most aggravating travel fees are out-of-pocket fees charged on frequent-flyer-mile award tickets. At least that's my impression from reading the comments on this New York Times article I was quoted in. Huge government taxes and fuel surcharges can make what should be a free ticket cost hundreds of dollars per person. People were furious about paying $600 for a "free" economy ticket.

And why wouldn't they be? Most people think award miles get you a free ticket like they used to.

By now, you may be well aware of the rule that on a United oneway award, you can't take a stopover. On a roundtrip award, you get one stopover. (This is just for awards booked with United miles.

I recently booked a fascinating award that shows just how simply you can turn a good itinerary into a great itinerary using the the concept I laid out in a post titled 7,500 Miles to Europe and Negative 7,500 Miles to South America.

The basic premise is the inverse of a free oneway. If you are booking an award within the US on American Airlines, consider adding on an international leg to the domestic leg for very little extra.

My client Mark came to me with 105,000 American Airlines miles and 103,000 Ultimate Rewards.