Before booking a flight, consider if the rate is cheaper if paid in another currency. Often budget airlines will make you pay in the currency of the country you're departing from, but this isn't always the case. An important note when doing this: make sure you're using a credit card that is free of foreign-transaction fees, otherwise your attempts to save money doing this will be lost! Our article on money matters for world travellers can help steer you in the right direction for the best credit cards for travel.
Fly out on the right day. Sure, leaving on a Friday promptly after work or heading on vacation on a Sunday after a relaxing weekend might be ideal, but it turns out these are the absolute worst times to fly. High air traffic on these days means that airlines jack up the prices. Plan your flights so that you depart on a Wednesday if possible, followed by a Tuesday or a Saturday. Mid week departures are the slowest, so carriers know they will have to accept lower costs in order to fill their seats.
You can even book your own multi-day layovers, essentially allowing you to see 2 destinations for the price of 1. Rather than spend a day sitting in the airport, you can spend multiple days exploring the city you are laying over in. AirWander is a specialized search engine for doing exactly this. Put in your origin, final destination, and number of days you want to stopover. AirWander will return a list of places you can visit on your stopover, often even cheaper than a regular flight search engine! To learn how to do this, read our guide on How to Get Free Extended Layovers & Hack One Trip Into Two.
Kiwi.com, on the other hand, will mix and match airlines (including budget airlines) in order to find you the very cheapest route. For long-haul flights especially, this can make a huge difference. The same search on Kiwi.com returns a route at $459.80 USD via JetBlue, Norwegian Air, and Vueling. That's a savings of $171.40 USD, and the travel time is even shorter!
various airlines that meet your date and departure
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.