Momondo helps you compare the prices of many different airlines. It is a popular and well-known booking site. They have very comparative fares for most of the destinations especially for those looking for last-minute tickets.

They have a great web interface with many features that allow you to view price trends for any travel dates. The site features include nice filtering tools, price tracking, and a fare calendar graph that shows the average price on any day.

When booking flights I always select include near airports. It is a huge advantage if you’re flexible with airports and dates. Even adjusting it by a couple of days or even sometimes one day can make a difference in the deals. Sometimes you can save hundreds of dollars so for me that's worth it. I’ve family in different states in the USA and Canada, and I travel very often between these places for both work and visiting family.

Expedia is another popular travel booking site, similar to Travelocity but fares are different between those two. They are one of the oldest booking sites and still a very reputable travel booking site. They also offer good travel rewards through their master card and earn points.

Their interface clearly shows the fares and baggage fees upfront.

A "Show flexible dates" option is available on the results page so you can see if cheaper flights are available if you switch your trip a day or two. If you travel often $100 here and there can really make a difference over time. Expedia has a discount if you adding a hotel to your itinerary, this is the same for many of the other travel sites. This could save money but before you book is sure to compare the hotel rates.

It is one of the few search engines that includes local budget airlines. Skyscanner is definitely an excellent booking site for those looking for cheap flight deals. It has a very robust search feature and filtering tools that allow you to compare prices from multiple OTAs and airlines sites and other booking sites. Their site also shows fares for an entire month, not all booking sites have this feature.

Another great feature is that you can enter whole country as search destination rather than just a city.

Kayak has some good features that you can use to your advantage. You can put in the dates, your origin, your budget then checks where the best flight deals are around the world, without putting the actual destination.

I think this is a good starting point if you’re not sure where you want to go or stay but you have a general idea about which continent that you want to go to. You can also see which airport is the cheapest to fly to. Before I book any flight I try to check a few more places for the best deal.

They offer many of the same services as other booking sites

Aviasales is not an OTA but rather a flight search engine, which means It tells you which airline or travel agency offers the cheapest flight that suits your budget. It is important to note that you are not directly booking with Jetradar. What I liked about Aviasales is that sometimes it shows the cheapest flight that may not be visible using other big flight search engines like Momondo, Skyscanner, or even Google flights. As a frequent traveler myself, have seen this many times. This site usually shows the best deals and greater discounts.

When using Aviasales to search for a flight, they will redirect you to the airline company's website or travel agency's website. Based on their website they have access to 700 plus airlines/travel agencies in their search including hundreds of budget airlines that are often not accessible on other major search engines. If you are really looking to save money on travel, this is one of the good options for comparison.

If you haven't tried this travel search engine consider checking for your next flight.

They offer discounted flights to students and those under the age of 25. Sometimes their airfares seem too good to be true, and I have booked with them a few times and great experience so far. They sometimes have excellent fare, especially for local flights, and for flights between Canada and the USA. They are BBB-accredited and I recommend their service.

As always, compare to the prices you get if you directly with the airline or other travel sites, also check what comes with the fare.

I've used CheapOair a few times and they often have great international fare. CheapOair is a reputable booking site that provides decent customer service. Their website is easy to use and prices are organized in a nice format.

Their user interface has many features that include vacation packages, alternate date fares, etc.

Google Flights is not an OTA, which means you can not directly book your ticket from their site. It is a flight search engine. It simply displays price trends and fares based o your flight date on a map. It also has a price tracking feature that allows you to track the price for a specific route.

You can use the Google flights price calendar feature to find which dates have cheaper flights. But generally, GoogleFlights are not the cheapest option so make sure to compare the fares on sites like Skyscanner, momondo etc. before purchasing the ticket.