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Which airfare web site should I use?

A comparison

The sites:    Expedia     ITASoftware     Kayak    Orbitz   SideStep   Southwest      Travelocity

The challenge: Which web site should be used to shop for airline tickets for travel within the US?  Which site quickly and easily displays the best flight options and allows you to easily determine the trade-off between total time of travel and cost?

Recommendation:

Use ITASoftware or Kayak.  Whether you have specific departure or arrival time constraints, want to explore savings by using alternate cities and flexible dates or are just looking for the lowest price, these sites are the easiest to use.  If your travel dates are very flexible, I recommend using ITASoftware's Month Long Search, it's a great way to view multiple date options with one inquiry.  If your cities are served by Southwest, you must check their site.  I recommend that you subscribe to Southwest's Click 'n Save fares.

ITASoftware's input options are flexible and logical and the filtering capabilities of Kayak (slide-bars and check boxes) are excellent.  With these sites, you can quickly see all of the trade-offs: total travel time vs. cost (non-stop vs. connecting), long or short connections.  ITA allows you to select individual flights and has excellent warnings.  Both sites easily accommodate alternate cities and dates for departure and arrival.  ITASoftware gives you alternate departure and destination cities up to 300 miles away while Kayak searches a smaller area. 

Don't confuse shopping with buying.  The primary purpose of my tests is to determine the best shopping site.  Once you've found the lowest price or most convenient flights, I recommend that you use the airline's web site to book your ticket.  In many cases, Kayak takes you directly to the airlines' web site so Kayak is very often both a shopping and a buying site.  The reason to buy directly from the airline is that ticketing fees are avoided, finger-pointing is elminated in case of a schedule change, an aircraft or price change or you miss your flight.  There are only a few instances where it is advisable to buy a ticket for a web site other than the airline's.

Frequent flyer miles? Is airline loyalty worth paying more for or taking a less convenient flight?  Due to the increasing difficulty in redeeming miles (without paying double) and that there are fewer first class seats available for upgrades, the answer is a resounding "NO."  I recommend that you select your flights based upon price, comfort, schedule and ticking flexibility.

Almost all flights are full and with the exception of a few airlines, coach seating is equally uncomfortable and amenities are almost nonexistent.  A few airlines have generous seating comfort in coach, free in-flight entertainment and even offer snacks or meals without charge.  Bottom line when it comes to airfare shopping: how to quickly resolve the trade-off of price versus total travel time.

The results

Probability (%) of finding the lowest or most reasonable fare at the following web sites for travel within the US:

Trip type Expedia ITASoftware Kayak Orbitz SideStep Southwest Travelocity
Business (short notice) 40 90 90 70 70 30 50
Leisure (plan ahead) 90 90 90 90 100 40 100

Average 

65% 90% 90% 80% 85% 35% 75%

Expedia, ITASoftware, Orbitz and Travelocity do not have real-time pricing and inventory.  These sites re-fill their inventory many times per day.  When you attempt to purchase a ticket on them, you will occasionally find that the price is no longer available.

How to use ITA & Kayak: 

ITASoftware and Kayak offer very powerful filtering either before or after your initial inquiry.  Both sites allow you to adjust departure times, select or de-select specific alternate airports, dates of travel, nonstop or multiple stop flights and price limits.  When using ITASoftware, select the time of departure as "anytime" and then narrow your window to refine the results.  The output matrix shows the lowest fares for non-stops, one-stops, etc.  Select the option called "Choose Flights" because it allows you to select your flights individually rather than the package of outbound and return flight.  Look at the lowest fare and then sort the result column for "duration."  See how close to the lowest fare you can get to the shortest travel time.  The "airports" tab that is very helpful because it shows near-by cities.  ITASoftware is used by other airlines and web sites although none of them fully use all of ITA's capabilities.  Be very careful of "Multiple Carriers" flights as they may involve changing airlines in the middle of your trip.  Some airlines will not transfer baggage so call the airlines if there is any question about it.  It's okay to take different airlines for the outbound and return portions of your trip but not within the same segment unless the airlines are 'code share' partners.   ITASoftware's optional settings are discussed in their "help" section.  I suggest you read the "ITA Route Language" section as well.  Here you'll find very helpful options that are extremely useful if you want to quickly narrow your search.  Both sites are excellent for making a "Plan B" to take with you.  Configure each leg of your trip as a one-way trip and sort the results by time of departure. 

 

Kayak has very handy slide bars and check-boxes.  You should expand any of them that are not already fully open.  Use them to filter or eliminate the flights that are: not at the right time, to/from inconvenient alternate airports, take too much time or cost too much money.

 

 

Southwest has never been known to have the lowest fares but they are often more reasonable than those of the high-cost airlines.  Southwest's specialty is on-time, high frequency and no dreaded Saturday night stay for their best prices.  Southwest also does not charge a "change fee" to modify your ticket, however you can not stand-by for an earlier flight if you are on a discounted ticket unless you are willing to pay the fare difference.  If Southwest serves your area (or is close) sign-up for their Click 'n Save e-mail specials.  They offer a sale 3 or 4 times per year.  The fare sales are for mid-week travel and do not include some fees and taxes.  I consider $300 to $350 round trip to be an excellent price for a flight of one stop or less.  In some cases, Southwest's prices were the lowest yet credit was awarded to other sites as well because some travelers prefer advanced seat assignments and will pay more.

Business travelers (short notice, non-Saturday night) can pay a LOT more than leisure travelers.  However, high-fare & short notice prices are being reduced due to competition from the low cost airlines that are now flying across the country non-stop.  If you care about the money you're paying, check the low fare airlines' (AirTran, Frontier, JetBlue, Spirit, etc.) web sites directly.  They may also have weekly e-mail specials to which you should subscribe or get via SmarterTravel's consolidated newsletter.

Is a near-by city better for your trip?  If you consider the total travel time, total cost, opportunity for missed connections and comfort, you should evaluate flying from or to a near-by city rather than your original departure and destination.  As an example, I've found that when visiting relatives who live near Tucson, I prefer to fly to Phoenix and then drive to their home near Tucson (under two hours).  This is because there are no non-stop flights between Detroit and Tucson.  Making a connecting flight to Tucson adds the possibility of a missed connection as well as a high probability of flying in a regional jet (which I will not do for more than 90 minutes) versus a non-stop, full size plane to Phoenix.  Public transportation may be available between the near-by city and your actual destination (or close to it).  Using the Tucson example, The Arizona Shuttle has frequent van service between the Phoenix Airport and the Tucson community.  There may be a practical near-by city for your destination.  Some airlines (Southwest and AirTran) list their "alternate cities" on their web sites.  The elements to consider are total time in transit, total cost, the risk of missed connections and the hassle & comfort factors.

Editorial: Travel is the largest selling product on the Internet.  People buy from a supplier because they trust them.  Only after you feel that you've thoroughly researched your options do you make a buying decision.  The purpose of this comparison is to see how easily and quickly you can reach that degree of confidence.  I believe that the input options, searching ability and output display & filtering flexibility of ITASoftware & Kayak provide the highest level of confidence in the shortest time.

Suggestions to the web sites:  Every site should allow you to limit the search to a maximum total travel time.  Sites should allow you to exclude: specific airlines, connecting cities, overnight flights, connections on non-partner airlines, using different airlines for each part of a trip but not within a leg, to set maximum and minimum connection times and to limit the dollar amount you wish to spend.  Most of these abilities are available at ITASoftware and Kayak.

What can the sites do better?  SideStep needs alternate dates for departure & arrival.  Kayak & SideStep should allow you to select individual flights.  The problem with Expedia, Orbitz and Travelocity is that if you don't ask your question the right way, you will not find the best answer.  Their air travel sites are very frustrating and waste a lot of your time.  The only serious limitation of ITASoftware is that it does not see "web-only" fares (but ITA doesn't sell tickets anyway).  All sites should warn you if your travels will involve a flight longer than 90 minutes in a typical regional jet.

Methodology

The primary criteria were whether I would take a specific flight and how difficult it is to find that flight on each web site.  Credit was awarded for the lowest fare (or reasonably close).  If multiple web sites provided the same or similar low fare (or reasonable alternative), credit was given.  A 'reasonable alternative' is a logical and short connection and/or a good price.  No credit was awarded for switching among non-partner airlines within a leg of the trip.  No consideration was given toward frequent flyer programs, hub city connections (Minneapolis in winter?), seating comfort (JetBlue, Midwest, United, etc.) or lack of seat assignments (i.e. Southwest), frequency of flights, etc.  Southwest may not serve the city but may be close.

There is a link at the bottom of this page which shows the details & prices from each inquiry.

Note that this study looked only at airfare prices.  Some of the web sites offer other useful travel tools: Orbitz Deal Detector, extra frequent flyer miles, package deals, cars, hotels, cruises, etc.

Trip types (2 types of airfare searches):

business = mid-week travel, less than 21 days notice, depart weekday AM return weekday PM, at least one night stay, no more than one stop and no more than a 2 hour connection.
leisure
= Saturday to Saturday, 21 days to three months in advance, depart and return any time Saturday, two stops max.

Cities:

Omaha, NE to Seattle, WA
Boston, MA area to Los Angeles, CA area
Oklahoma City, OK to Columbus, OH
Tucson, AZ to Detroit, MI
Indianapolis, IN to Dallas, TX area
Ft. Myers, FL to New York City, NY area
Phoenix, AZ to Orlando, FL
Chicago, IL area to Denver, CO
New Orleans, LA to Boise, ID
Pittsburgh, PA to Houston, TX

Specific flight details and results are here.

 

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