Nearly three years ago, this site reviewed the then-burgeoning field of airfare aggregators, also known as metasearch sites. These sites let you compare the fares available across multiple airlines and across multiple booking sites, to help you find the lowest fare. Last time, Kayak came out on top. How much has changed in the last three years?

For starters, there are sites which have folded, some new competitors, and sites that changed their model significantly. At the same time, there has been pushback from airlines and suppliers, some of which have resisted the aggregator model. (The lawsuits between American Airlines and Kayak, which initially resulted in American Airlines no longer being listed in Kayak results, was perhaps the most prominent case of pushback. Since October 2008, aa.com results are back in the results. More on that below.)

The result: The golden ring of a truly complete search, covering all the options and all the providers, is still a ways away. No single site actually finds every flight option, every fare, or every seller.

But that doesn’t mean that there aren’t differences between the aggregators. It’s time to disaggregate the aggregators again.

This year, each site was put through multiple tests. Four kinds of itinerary were tested: A large-city to medium-city domestic US flight with multiple carriers offering direct service; a medium-city to small-city domestic US flight with at least one change of plane required; an international flight with a US origin; and international flights (from Paris to Dubai, and Manchester to Madrid) to test how sites do for non-US flights. For each of these flights, I tested a short-term booking (7 days advance purchase) and a longer-term booking (30 days advance purchase).

This time, I compared Kayak, Sidestep, Mobissimo, TripAdvisor Flights, Momondo, Skyscanner, WeGo (formerly Bezurk), Trax, Farecast, Fly.com, and Dohop. Sites which were on the list last time but either folded or stopped doing metasearch include FareChase (bought by Yahoo, then abandoned in March 2009), PriceGrabber, and Qixo.

So which aggregator came out on top in 2009? Here’s the summary, with site-by-site reviews thereafter… (more…)

Rick Seaney and the FareCompare team have once again beaten me to the punch: They’ve compiled a list of U.S. domestic airlines’ fees and put them all in one place.

Most every fee the airlines have imagined (so far) is there. The phone booking fee. The luggage fee. The cost of snacks, booze, and meals. The pet fee. The skycap fee. The re-ticketing fee. And on and on. (The fee fee, the Arial font fee, and the fee fi fo fum fee, as outlined here, somehow didn’t make the cut.)

It’s a great list, insofar as it helps consumers make better decisions. I’ve always argued that the lowest fare may not be the best value. (And that doesn’t even take frequency, upgrade possibilities, on-time arrivals, or anything like that into account.)

Be sure to check out the list.

File this under PR that works, because it makes me laugh… FareCompare has decided to send a semi-crotchety member of its staff to every state in the continental U.S., dressed in a Santa suit. It’s a simultaneous homage to Christmas, a testament to mileage-running, and a test of their site’s low-fare search capabilities.

The travels and travails of Grumpy Santa, who gets to spend all day in planes for close to two weeks, are being tracked at FareCompare’s Santa site. I hope he’s on the clock while he’s doing this. And that he gets to keep the miles.

I joked to FareCompare CEO (and blogger) Rick Seaney that Richard Nixon had tried this once before, when he campaigned for president in 1960. He just didn’t care about saving money on airfare at the time. (For the political junkies out there: Nixon promised to visit all fifty states when he accepted the Republican nomination. He lost to Kennedy, and pundits have argued ever since that Nixon spent time flying to out-of-the-way places, just to cross off a state from his 50-state strategy, rather than campaigning in tossup states where his presence might have made a difference.)

So in the spirit of the other season we’re in — presidential election season — I requested a photo of FareCompare’s Grumpy Santa giving the Nixon “victory” farewell from the top of the air stairs. Ask for photo, get video. How’s THAT for service!

(Reading this in a feed reader? Click here to view the original post with video.)

The other day, FareCompare.com CEO Rick Seaney sent over an analysis of AirTran’s recent fare sale. “When is a fare sale not really a fare sale?” The answer: When the airline hikes its fares, only to lower them with great fanfare a few days later. Hooray for the status quo?

Rick suggests that this is tantamount to those stores that once lined the streets of midtown Manhattan, declaring they were going out of business. That is, until you saw that the name of the store was “Going Out of Business, Inc.” or something like that.

So how did AirTran join such esteemed company as the all-things-must-go merchants of New York City? Within a one-month period, Air Tran raised their fares three times — twice for three days, once for five days — and then brought them back to the previous level. Each time, their return to normal pricing was heralded with breathless press releases and a marketing blitz, announcing a sale.

Rick is right: This is an at best questionable, at worst deceptive business practice. Think about it: If a department store jacked up its prices for a few days, then brought them back to normal, customers might be filing complaints with the Federal Trade Commission. Perhaps AirTran thinks that the fluctuating nature of air ticket prices makes them immune to such charges, but I think they’re walking on some very thin ice.

So now they’ve been called out on it. We’ll see if they’ll change their tune, of they’ll just keep right on doing it. If enough people catch on, the phrase “AirTran fare sale” might be like the boy crying wolf.

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This is the kind of experiment I wish I had thought of first: The guys at FareCompare decided to put various airline websites’ low-fare guarantees to the test. The results are mixed.

They did it by actually buying a ticket on every airline in their test. (They only included airlines that HAD a guarantee, naturally, so that meant American, Continental, Delta (sort of), Northwest, and United. US Airways, Southwest, AirTran, jetBlue, etc., weren’t included, since they don’t have a guarantee.)

Because FareCompare’s fare alerts — which I have strongly recommended in the past — give you several hours’ advance warning when a fare is about to drop, they knew exactly which tickets to buy. They bought the tickets before the fare drop went live. When the fare went down, they took a screenshot of a lower fare and filed for a refund and/or voucher with the airline.

What they found: Lots of variation. Each airline eventually came through, but the amount of effort required varied greatly. It wasn’t always easy: Some denied refund requests at first, or didn’t respond within 24 hours.

The airlines’ policies vary, too. Most required a $5 difference before considering a refund, but Continental required $10. Most give a cash refund, but United only gives vouchers. Most accept a lower fare published on any site, including their own, while American and Northwest bizarrely exclude lower fares that appear on their own sites. Delta doesn’t have a guarantee, per se, but they’ll refund your ticket within 24 hours.

It’s a great experiment. Go read the whole thing.

Note that FareCompare was testing the airlines’ sites only. Some online travel agencies have guarantees as well. For example, the folks at Peter Greenberg’s site recently had to step in to help a reader enforce Expedia’s guarantee.

In all these cases, it’s up to the customer to proactively search for a lower price within 24 hours. No one is going to volunteer the news that the price has dropped. But if you’re willing to spend the time and effort to check the prices again and wrestle with customer service, you could collect a few bucks.

The folks at FareCompare.com are an inventive bunch. I really like what they’re doing to lift the hood on the mechanics of airfares. I’ve previously posted about their fare alerts that tell you what the discounted fares will be hours before you can actually buy them, and how their fare search tools let you do flexible searches that the big booking sites have disabled.

So when FareCompare COO Neil Bainton started posting an index of airfares at his blog for airfare wonks, Airtravelchannel.com, I was interested.

What the index does is track the lowest fare (ignoring fare rules like minimum stay or advance purchase) between the 50 largest markets in the United States. That’s 1250 fares. (50 markets times 50 markets = 2500, but the fares are the same in each direction, so divide it by two to get 1250.)

Much like the Dow Jones Industrial Average doesn’t track all stocks, but only 30 blue chips, this index doesn’t cover all the bases. The index is a first cut at measuring the state of airfares as a whole. With tens of thousands of city pairs, and hundreds of fares between each airport, getting a glimpse of ALL the airfares in America isn’t going to happen anytime soon, and might not even be useful. (How many people really want to fly, say, from Grand Junction, Colorado to Pellston, Michigan? So I don’t think it’s not really necessary to include every fare.)

The index could have some interesting applications, especially for journalists or financial analysts who want to track the big-picture of fares in America. Just this past Tuesday, the index “crashed” 29 points, or 5.8%, with a Delta sale bringing the average down.

The index also comes with a one-to-four star label, to give the current reading historical context. Four stars obviously means that fares on the whole are generally good.

But the utility of this number isn’t immediate: No one buys “fares on the whole,” they buy specific tickets. This is all interesting stuff, and data hounds could eat this up. But individual travelers would probably benefit from a more localized index that targets their home airport. Neil tells me this is in the works.

An index just for your own city might be one extension. A rule-driven index might be another. Business travelers who can rarely take advantage of ultra-low advance purchase fares might instead benefit from an index of refundable fares, or 3-day advance purchase fares, possibly sorted by home airport as well.

Much like there is an industry-specific stock index for practically every sector of the economy, this could balloon into a huge number of indicators. Heck, this could be monetized by creating futures contracts based on an index like this. Go long the San Francisco fares and short the Dallas index! Don’t laugh, there are websites out there that already do this sort of thing, and Wall Street isn’t far behind.

In any case, it’ll be neat to see where this goes. Information like this increases the transparency of airfares and travel costs as a whole, which is good for consumers. Bring it on.

The good folks over at FareCompare want to know what you think will happen to Delta in the great merger game, so they’ve set up a poll. It’s not quite making book on the outcome, but they’re trying to see what the public thinks will happen.

(And no, the TradeSports/Intrade people haven’t set up a wager for airline mergers. Yet.)

Click here for the poll.

Reader Steven writes in:

I know that so called y-up fares can be a good way to sit in first class for cheap, but I can’t find them for flights to Europe or Asia. Can you help?

The reason you can’t find them, Steven, is because there are none by that name. International long-haul discount first (and business) class fares go by different names than their domestic equivalents.

Y-UP fares and their ilk are limited to North American flights, and generally refer to an upgrade from coach to first on two-class planes. See here for background on Y-UP fares, and see FareCompare’s Y-UP search tool to find these fares on routes you travel.

For Europe or Asia, you’re generally going to be looking for Z-fares. But there’s no handy-dandy search tool (yet) for Z-fares like there is for Y-UPs. (Neil and Rick, consider this a challenge!…)

Z-fares crop up from time to time, but aren’t available on every route. Traveling in summer or the December holiday season maximizes your chances of finding such a fare.

For international premium class travel, be sure to also consider the startup airlines like Maxjet, Silverjet, Eos Airlines, MiMa, and L’Avion (update: L’Avion is now renamed OpenSkies). These offer all-business class flights to London, Milan, or Paris.

Related:
- First class for less than coach?
- More tips on finding discounted first class fares (Y-UP, Q-UP, etc.)
- Update/Correction re: discounted first class fares (Y-UP, Q-UP, etc.)
- Y-UP and Q-UP first class fares apparently not enough: Welcome M-UP and B-UP fares
- More trans-Atlantic flights, but lower prices?

I’m a fan of FareCompare’s fare drop alerting service, which I’ve mentioned before here. The alerts go out as soon as a lower fare is loaded into the system, sometimes several hours before it’s actually even available for purchase. That beats the pants off of Travelocity and Expedia alerts.

Until now, the problem was the volume of alerts. If you signed up for their e-mails, you’d get three messages a day, essentially one for every instance of new fares being published. If any flights, to anywhere in North America, dropped, you got an e-mail. That’s great if you’re completely flexible about your destinations, but really, how many people want to travel to Ketchikan, Alaska in November?

Now, finally, you can limit alerts to just those cities you want. Once you’ve signed up for alerts (see the box on the left side of their homepage), you can click “manage” and tinker with the settings. Big thumbs up on this improvement.

Reader AJ writes in. His question:

I would like to find an airfare search engine where I can put in an airport and see:

a) Where all the direct flights go and the prices for each.
b) specify “Europe” or “Asia” and see the best prices to countries in those regions.

Why you ask?
We frequently travel last minute, and frequently we do not care where we go, we just like to go. So if we have 5 days with nothing to do and want to go someplace, anyplace, in Europe it would be handy to see what the lowest price option is.

First off, I admire your flexibility, AJ. Way to go.

Your first criterion, finding only the nonstop flights from a particular departure point, is tough. Some search engines will let you specify nonstops only when you’re searching specific dates, but I can’t find a nonstop limitation on any of the broad, flexible searches I’m familiar with. (Other readers are invited to chime in with suggestions in comments!)

As for looking for the cheapest flight for ultra-flexible destinations, you’re in luck:
The two best options right now are offered by FareCompare and Mobissimo. Travelocity offers an option for domestic travel. ITA Software has a solution, too, but it requires more work and is not as flexible on dates. Here’s the breakdown:

- FareCompare offers a flexible destination search through their “Destination Deal Maps” in the middle of the page. Click on the continent you want, and a list of fares will appear. Clicking on a fare shows you the dates eligible for the fare. Pick a date, then an airline, and the system checks seat availability. FareCompare doesn’t sell tickets, so you’re directed to one of the major online agencies to close the deal.

- Airfare aggregator Mobissimo also offers a search like this, bizarrely located in the “activity search” tab. After selecting your departure point, you can select the desired continent from the pulldown. It’s odd to see “Europe” or “Africa/Middle East” listed as an “activity” right alongside “beaches,” “gambling,” or “opera houses.” But hey, the search works. Like FareCompare, Mobissimo doesn’t sell tickets, but directs you to the seller.

- Both FareCompare and Mobissimo effectively mirror Travelocity’s Dream Maps in format. But Travelocity recently neutered this tool for international travel searches. It still works well for domestic searches, and the site sells tickets directly. (The flexible international search was taken down because the fares didn’t include the fuel surcharges. See here for an explanation.)

- One final idea would be to use ITA Software’s search. ITA’s search requires you to input destinations, but it allows you to string a number of options together. For example, you could enter your departure city, then add a boatload of contending city names or codes to the destination field in the form. Say you’re interested in going to Europe, you could enter something like “ams;fra;par;lhr;dub;mad;cph;ath;rom” — a string of European cities’ airport codes, separated by semicolons. Then widen the destination search by using the pulldown menu to include any airport within 300 miles. Then click “more options” and uncheck “allow airport changes,” to make sure you arrive and depart the same city. That will pull in a LOT of destinations for the dates you want. ITA doesn’t sell tickets, and doesn’t point you to a seller — take your pick.