- Air travel sites search through information provided by airlines to find flight schedules and airfares. While select sites might search fares from a small number of airlines, others can search many airlines, compiling results for users to consider. Sites searching through large numbers of airlines typically return the most flight schedules and fare options.
- The majority of air travel sites ask users to enter the desired date of travel, which the website uses to return schedule and airfare results. Some sites also return schedule and airfare results for days surrounding the user-entered travel dates. Alternate date functionality can often return lower fares for travelers to compare.
- The majority of air travel sites offer online flight booking, but a few sites also include search and reservation sections for additional services travelers need to plan a trip. Additional services and products can include hotel reservations, car rentals and travel insurance.
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