How to buy cheap airline tickets
Buy a package — buying a hotel room with an air ticket can often save you a lot. This also brings extra revenue to the booking agencies and if you happen to use one you will be reminded about the savings not once
Be flexible with dates — plus/minus one day can make a huge difference with air travel. Once I saved around $200 on a ticket to Europe by moving the departure date from June 1 to May 31.
Research nearby airports — many services provide an option which will enable you to include into your search the nearby airports around your departure/destination point. This may help you reduce the price.
Go for extra stops — non-stop flights are usually the most expensive and if you have time at your hands consider a connecting flight instead
Below are the online tools to help you find the best ticket price grouped by category. Each category is different and serves its own distinctive purpose.
Search Engines
These will search for the best price and then redirect you to the booking agency or airline website to buy the ticket. Search engines are free to use and make money from advertisement. Sometimes the listed price will not be up to date since search engines often cache prices to speed up search. Use them to get an estimate and don’t be surprised if the price at checkout will end up slightly higher.
United States
Kayak — search 321 airlines
Sitestep — search 150+ providers
Farechase — search 34 providers
Farecast — airfare trend prediction for a limited number of departure cities
FareCompare — convenient for flexible dates
ITA Software — software behind Orbitz and others
International
SkyScanner — search 313 airlines
Momondo — search 214 providers
Mobissimo — search 157 providers
Dohop — search 660 airlines
Trabber — search 30 providers
Booking Agencies
These will search for the best price and will charge you a fixed fee (around $5) to book the ticket. Unless you are in a hurry it is always a good idea to check the airline website directly (see the list below) before paying the agency. Just as with search engines the booking agency may sometime display stale pricing data although this usually happens less frequently
Orbitz — I have had the best experience with this company, their customer support actually answers phone calls. They claim to search 455 airlines.
Expedia — The largest and most popular booking agency according to Alexa ranking. Their airlines selection looks impressive as well.
Travelocity — I have always liked their “Flexible Dates” option which allows me to shop for discounted tickets however most competitors nowadays offer the functionality as well
Cheaptickets — another website to check. From my experience the prices you will see are the same as at Expedia or Orbitz but their booking fee can be $1 or $2 less
Hotwire — is owned by Expedia and has a shorter list of suppliers. I personally don’t see why you would want to use it instead of Expedia which gives you better search options
Priceline — better known for their “Name Your Own Price” functionality available with hotels (read about it here).
Qixo — a smaller and less popular agency with a subset of functionality compared to what you will find at the competitors
Cheap flight
