Travelocity (www.travelocity.com)

This online travel website was founded and owned by Sabre Corporation and currently owned by Expedia. The most important on travel, is the cost of stay and hence this website offers the exclusive deals for the hotels, cars and flights. The mobile app introduced by the site gives the traveller to do quick bookings from the mobile. It is ranked under the Alexa rank of 3153.

Visit Travelocity

Orbitz (www.orbitz.com)

Headquartered in the Citigroup Center, Chicago, Illinois USA, this website is the subsidiary to the Expedia and found in the year 2001. It is regarded as one of the best websites for research, plan and travel. More than 14.9 Million monthly users navigate to this website.

Visit Orbitz

Cleartrip (www.cleartrip.com)

If you want to book for Flights, hotels, trains and other activities,  you have come to the right place, as Cleartrip is the site that does all these for you without any hassle. Again, bookings can made through the mobile applications as well. The mobile application is available for Android, Apple and Windows platforms.

Visit Cleartrip

Fancy Hands

The site helps you by doing this -  confirm the hotel booking has a cot, find three suggestions for dinner, call to explain flight is delayed, find quickest way to the art museum, and so on. For a monthly or yearly fee, you can submit 20-minute requests by email, phone, text or direct to a 24-hour cyber-team who will spring straight to work.

Visit fancyhands.com

Open Table

if you’re travelling through busy cities like London, New York or Sydney, where bagging a table at a peak time in a popular spot can be impossible without a reservation. With more than 40,000 restaurants to choose from, it’s still the biggest and best – and lets you search for places to eat by district, cuisine and review score, before booking your table for free.

Visit the website - opentable.com

Priceline.Com (www.priceline.com)

Priceline is a well-known online travel site that focuses on all aspects of your vacation – not just on flights or hotels. Easy to navigate, the website offers you several options to find great deals for flights or hotels using the Name Your Price tool.

Visit Priceline.com

Hotwire

This online travel agency enables you to filter your search by proximity, star rating and by facilities that offer accommodations for disabled guests.  It features guest reviews from TripAdvisor so you can read feedback from past guests.

Click here to view it - Hotwire

CheapOair

At this website, one can use the Flexible Dates feature to find cheaper airfare or accommodations. Also it enables you to request special accommodations if you are traveling with someone who is disabled. Its mobile app is one of the easiest to use and lists additional discounts and travel alerts. CheapOair, however, charges hefty fees, especially if you cancel your plans.

Website visit - CheapOair

GOIBIBO

This online travel site in India enables travellers to buy air and bus tickets, hotels and holidays. It is a part of the MIH India Group. Within a short span of time, Goibibo has trounced many travel sites. Alexa Rank in India - 275.

Visit goibibo.com

Lonely Planet (www.lonelyplanet.com)

In this website, the users can also avail the services like flight bookings, adventure tours, sightseeing tours and other transfers. Brad Kelley, one of the billionaires in the America, owned this company. Lonely Planet holds the Alexa rank of 3224 throughout the world. It gets 14.5 Million monthly users traffic.

Visit lonelyplanet

Also some other best websites in the list:

MakeMyTrip (www.makemytrip.com)

akeMyTrip is the Indian online travel website which is widely popular across the world. Makemytrip has transformed the travel industry over the years in India. Make my trip provides the exciting offers in the travel deals for the first time registered users and also for the existing users. The website was founded in the year 2000 at Gurgaon, Haryana, India. The Alexa Rank held by the site is 52 in India and 1310 throughout the world.

Visit MakeMyTrip

Kayak.com

The more flexible you are on time and destination, the better your chances of finding a great deal. It also lets you specify your preferred flight time, vacation activities (beach, gamble, golf or ski?) and weather (based on temperatures). Kayak can also help you bite the bullet and buy your ticket, or not, with its "Price Predictor" which forecasts whether fares will go up or down.

Visit Kayak.com

AirfareWatchdog

This site is best for travelers who are ready to take off at the drop of a deal. The site has actual people 'wait in ambush' on airline Web sites in anticipation of fare sales. They sign up for rewards programs to snag promotional codes and discount offers that can be passed on to AirfareWatchdog users. So you can get a better deal out there at this website.

Visit AirfareWatchdog

WhichBudget.com 

This site helps you build an inexpensive, overseas flight plan by using local, budget airlines — a great way to save on international travel. For example, if you search for flights from Bangkok to Beijing, you'll get options from China Eastern and Hainan Airlines. Grab more of the deals from the site.

Visit WhichBudget.com

 CruiseCompete.com

If you are a eleventh hour horse, this site is just right for you. More than 300 travel agencies are compared to give you the lowest prices for dates, ports and ships you specify, whether you're booking well in advance or at the eleventh hour.

Visit CruiseCompete.com

Conclusion

Any of the site that is selected should be based on the policies the site works on. This way there would be less of confusion while travelling and one can enjoy the travel spree all the way!