Reader Martin asks: I am trying to book IAD-CDG, BRU-IAD and trying to add my free oneway from IAD to ?? No mater which destination I choose the page always comes up with no available flights even though I check those flights separately and I can see there is availability. Any ideas?

It seems like I've gotten a similar question almost daily since I broke the news that you can add free oneways onto most United awards.

As a companion to the mega-popular Free Oneways on United Awards, I've made this video of me booking such an award.

Yesterday, I wrote about how to book free stopovers online on your United awards. While researching for that post, I made a typo that caused me to discover a loophole that allows us to get free oneway flights on United awards in much the same way we can get free oneways on American Airlines awards! This discovery completely changes the way I'll be booking United awards from now on.

Getting these free oneways requires taking advantage of United's booking rules that allow one stopover and two open jaws for international awards from the US.

Yesterday, I talked about how to book a stopover on an American Airlines award online. Booking an award with a stopover online saves time and money, so today I want to explain how to book a stopover on a United award online.

The main limitation when trying to book an award with a stopover online is that you can only book awards online when the airline whose miles you're using loads the availability of the partner whose planes you want to fly.

This post is part of a four-part series. In Part 1, we looked at the mechanics of the United Mileage Plus program. In Part 2, we looked at the chart and rules to find valuable awards. In Part 3, we valued specific Mileage Plus awards. In Part 4, I’ll put a number on one Mileage Plus mile.

In this post, I’ll explain why I value one United Mileage Plus mile at 1.81 cents, but your value will be different. To start I’ll go back to the values for the redemptions I found in Part 3.

This post is part of a four-part series. In Part 1, we looked at the mechanics of the United Mileage Plus program. In Part 2, we looked at the chart and rules to find valuable awards. In Part 3, we’ll value specific Mileage Plus awards. In Part 4, I’ll put a number on one Mileage Plus mile.

Now that we've looked at the rules of the Mileage Plus program, and we've looked at the chart to find some valuable awards, we're going to value specific awards.

This post is part of a four-part series. In Part 1, we looked at the mechanics of the United Mileage Plus program. In Part 2, we’ll look at the chart to and rules to find valuable awards. In Part 3, we’ll value specific Mileage Plus awards. In Part 4, I’ll put a number on one Mileage Plus mile.

In this post, I'll detail what I think are some of the best Mileage Plus awards from North America.

This post is part of a four-part series. In Part 1, we will look at the mechanics of the United Mileage Plus program. In Part 2, we'll look at the chart and rules to find valuable awards. In Part 3, we’ll value specific Mileage Plus awards. In Part 4, I’ll put a number on one Mileage Plus mile.

United miles have a reputation among mileage collectors for being the most valuable mileage currency around.

Hey there, you're reading an outdated post! The updated series from April 2015 can be found here.

This is the eighteenth post in a monthlong series. Each post will take about two minutes to read and may include an action item that takes the reader another two minutes to complete.