At Iwantthatflight.com, setting up an airfare alert is easy. Just conduct a search for your specific destinations and dates and once the flights and fares for that search are displayed, insert your email, submit, and you will receive fare alerts that match your selections. You can also specify the price at which you’d like to be notified. For instance, if you want to be alerted when the price for the flights drops below $700, you would type “$700” into the request box versus the current price which is the default amount. What I like about the site is that you can track a specific flight but I don’t like that it doesn’t give you more options such as different dates. You’ll have to set up a separate alert for each set of dates. Also, it is an Australian website so prices are shown in Australian dollars. It is not a booking site however so you’ll be directed to the appropriate airline or agency site offering your chosen fare.
All of the sites allow you to search by preferred times but none to my knowledge allow you to set up alerts for specific arrival/departure times. Interesting idea to have sites sort flights by legroom cost, hadn’t thought of that and certainly have not seen it. Southwest used to have an alert tool called Ding, but no longer. You can include Southwest on Google flights but in its search results it only shows scheduling, you’re redirected to the Southwest website for pricing. Sorry I can’t help you more with your wish list but I sure do thank you for your comments and questions.
Within Momondo’s flight results, there are tabs across the top of the screen that let you move between the cheapest flight, quickest flight time as well as options for ‘early out’ and ‘late in’.  The results are extremely easy to read and feature all the information you need at a quick glance, including the carrier logo and total transit time. When you click on one of the them, you are quickly forwarded to the airline’s website.
You can find almost anything you need to know about airline schedules, seat maps, flight statuses and more using ExpertFlyer, but today’s guide is focused on one functionality: searching for award and upgrade space. The platform currently allows you to search for this inventory on nearly 90 different airlines, though the exact fare classes vary from carrier to carrier. Carefully review the list to see what inventory is available for your desired airline — American, for example, shows both award and upgrade space for its flights, whereas Delta upgrade space was removed several years ago.
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If I had to award a ‘peoples choice’ in this category, it would go to Hipmunk. It does almost as good a job of finding and tracking information on flights as Google Flights, but delivers it inside a better design, displayed according to the ‘agony factor’ of the flight (a combination of time in the air, departure and arrival times, cost and layover), in a beautiful interface.
A flight alert tracks the price of a specific route or flight. When the price changes, you’ll be notified via email or push notification if the price went up or down (and by how much). Flight alerts are completely free and can be stopped at any moment. It is also possible to have multiple price alerts set up at once which is a great option if you are comparing vacation destinations. It really is a must-have tool, especially for budget travelers, because flight alerts are hands-down one of the best ways to find cheap flights, fast. 

Sites in this latter category, which is growing at a rapid clip, may include a search component, but they also provide a list of low fares and/or alerts about such fares, either delivered by e-mail or posted online. They're ideal for people who are just looking for somewhere cheap to visit, or who are hoping to travel on specific routes but want to buy when fares are at their lowest. In alphabetical order, here are 10 of the best.


Also, ask about availability at check-in, particularly on international flights, where the check-in agents sometimes have more control over the seating chart. Then, if seats appear to be available, check in again at the gate. The final, “miracle” upgrades always happen at the last minute, when all passengers are checked in and any remaining availability becomes clear. Make sure you are within earshot of the gate desk, although hovering over agents is not recommended.
Gary Leff is one of the foremost experts in the field of miles, points, and frequent business travel - a topic he has covered since 2002. Co-founder of frequent flyer community InsideFlyer.com, emcee of the Freddie Awards, and named one of the "World's Top Travel Experts" by Conde' Nast Traveler (2010-Present) Gary has been a guest on most major news media, profiled in several top print publications, and published broadly on the topic of consumer loyalty. More About Gary »
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With your chosen route selected, look to the left of your screen. You should see a button with a bell icon that says “get price alerts”. This is what you want to click. If you are already signed in, you are good to go. If not, it will ask you for your email. Enter your email address then click ‘Create Alert’. You will now be notified of any price changes for this route.
Buy an extra seat. One interesting tactic to find yourself some breathing room offered by Petersen might appeal to folks traveling on very cheap sale fares: buy two coach tickets. Say you find one of these $100 roundtrip fares to Florida or the like; the airlines that offer these usually make up the difference in fees for checked bags, movies, food and other extras. However, if you don’t need headphones or to check a second bag, you can skip all those charges, and get yourself a heap of legroom for $50 — less than the cost of most premium seats.
Airfarewatchdog – You can set up regular price alerts for favorite routes, but the real appeal for cheapskates with wanderlust is this site’s Top 50 Fares of the Day page. This tracks bargain airfares from Frontier, JetBlue, and other carriers prone to slash prices, as well as larger airlines. (Sample deal from earlier Wednesday: $40 for a roundtrip flight from Pittsburgh to Las Vegas).
Number 2 is that you don’t even need to know where you want to go. Based solely on your fixed dates or a broad time period, the Explore option shows you where is cheapest to fly, which is a perfect tool for the early stages of your trips. I use it this feature a lot when planning a trip itinerary or choosing which hub city should I adopt in a multi-city trip. 
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