Not only does it help to be flexible with dates and destinations but being flexible with the route you take is another way to get a cheap flight. Sometimes it’s cheaper to fly to London and take a budget airline to Amsterdam than to fly direct to Amsterdam. There are so many budget carriers around the world that taking advantage of a good deal to another city and then hopping on a budget flight to your destination is sometimes the best way to go. I had to go to Paris once; the flight was $900 USD, but I could fly to Dublin for $600 and get a $60 flight to Paris. It meant more flying time, but the $240 I saved was worth it.
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Use skyscanner.net. This neat website searches all airlines, big and small, and allows you to look for the cheapest rates out of your local, rather than getting bogged down with specifics. Meaning, if you know you want to go on vacation but aren’t too picky about where, this website will provide the cheapest flights to everywhere in the world from the nearest airports to you.
It might take more than a week’s holiday to get around this vast country but whatever you want to do, you can do it here! From state to state everything changes from the landscape to the food, the people to the culture. From vast deserted plains to snowy mountains, swathes of thick forests to alpine lakes, lush vineyards to dense urban streets, white sandy beaches to craggy peaks.
You're not crazy for thinking that a flight price has changed after searching it a few times in your web browser. Based on the cookies in your browser, flight prices do increase when a particular route is repeatedly searched, as the site wants to scare you into booking the flight quickly before prices get even higher. Always search for flights in incognito or private browsing mode to see the lowest prices.