Looking for cheap plane tickets? There are three categories of travel websites you might want to check out.

1. Airlines: Some airlines offer fares available only on their websites. Make sure to check out airline websites to find best fares.
Airtran Airways
Alaska Airlines
American Airlines
Continental Airlines
Delta Air Lines
Frontier Airlines
Hawaiian Airlines
JetBlue Airways
Southwest Airlines
Spirit Airlines
United Airlines
US Airways
Virgin America
more airlines
  
2. Fare Aggregators: Aggregators search multiple airlines and redirect you to airlines website for booking. In return, aggregators usually receive commissions when you click on the search result. Some airlines may not participate in aggregator's fare search system.
Bing Travel
Fly.com
Google Flights
Hipmunk
ITA Software
Kayak
Mobissimo
Momondo
  
3. Online Travel Booking Sites: Similar to aggregators but offer booking service. They are like online version of traditional travel agencies. Might be useful when you need hotels and cars in addition to a flight. Some airlines may not participate in their booking system.
Expedia
Orbitz
Hotwire
Priceline
Travelocity
Cheaptickets.com
 


 

 

 

US Average Airfare Changes
 Airfare Price Change (historical data): click here

Cheap Plane Tickets from Airlines: -- editor's pick!
Travel April 3 through June 27 -- AirTran
Purchase by  March 29, 2012, 11:59 pm Pacific Time. Travel April 3 through June 27, 2012. Travel valid only on Tuesdays & Wednesdays. Sale fares for travel on other days of week may be available, but not guaranteed. Travel to/from Florida not available for travel April 3-April 16, 2012. Travel to/from Knoxville, TN not available after May 31, 2012. Travel to/from Bloomington/Normal, IL, Charleston, WV, Washington D.C. (Dulles), and Miami, FL not avilable after June 2, 2012.
Travel April 15 - April 29 -- Alaska Airlines
Purchase by  March 26, 2012.  Anchorage to Cordova, Portland to Vancouver, Portland to Phoenix, Seattle to Great Falls, Portland to Helena, Wenatchee to Fresno
U.S. Flight Deals -- American Airlines
Reservations are required. Tickets booked on AA.com must be purchased at least 10 days prior to departure, or within 1 day of making reservations, whichever comes first, but no later than 11:59 p.m. (CT) March 29, 2012.. Travel April 3, 2012, through June 27, 2012. Not valid for travel June 7-11, 2012. A 3-night or Saturday-night minimum stay may be required, based on destination.
U.S. Cities -- Delta
Tickets must be purchased at least 10 days prior to departure, but no later than March 29, 2012. Travel may begin on or after April 3, 2012. Travel must be completed by June 27, 2012. Blackout Dates April 6-8, 15, May 24-25, 28, June 3, 10, 17, and 21-25, 2012. Travel on Tuesdays and Wednesdays. Higher fares are available on Mondays, Thursdays, Fridays, Saturdays, and Sundays. Minimum Stay Saturday night, Maximum Stay 30 days or through June 27, 2012, whichever is earliest.
Starting at $69 One-way -- Southwest
Include all government taxes and fees. 10-day advance purchase required. Purchase from March 20 through March 29, 2012, 11:59 pm Pacific Time. Travel April 3 through June 27, 2012. Travel valid only on Tuesdays & Wednesdays.

More Fare Deals to International Destinations:
Canada
Europe
Mexico, Caribbean, Central & South America
Asia & Oceania
Middle East & Africa