A reader writes that according to KLM's web site you can use miles to upgrade from fare class U. If you book, however, you can only choose between economy and business class. Thus, you cannot book a particular fare class.
You can do so at KLM's American partner Delta Air Lines, so he books KLM-flights at Delta. The U fare class is considerably more expensive than the lowest fare, but he does book it to be able to buy an upgrade with miles.
You are not anonymous if you are searching the internet for air fares. Cookies stored in your web browser may give online retailers clues as to your income bracket and price-sensitivity.
Your internet address may be linked to your physical address revealing whether you live in a rich or a poor area. This allows for price discrimination by sellers, which means they offer different prices to shoppers in different areas.
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Some travelers bought first-class tickets to Hong Kong for just 4 frequent-flyer miles plus $40.50 in taxes and fees.
United announced it would not honor the reservations because the bookings resulted from a programming error. The carrier would give