We’ve all experienced tiresome, repeated searching when trying to book the cheapest possible flights to any given destination. With endless search engines and continually fluctuating prices, the approach to frugal flight booking is overwhelming.

Here are some key tips that will save you time, frustration, and most importantly money when booking your next flight.

1. KEEP YOUR SEARCHES TOP SECRET

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.

In Google Chrome or Safari, incognito is enabled by hitting Command (or “Control” if using a PC), Shift, “N”. For Mozilla Firefox or Internet Explorer, hit Command (or “Control” if using a PC), Shift, “P”. This will open a new browser window where your information is not tracked, thus not inflating prices as you search. Note: if you’re using an older version of OS X, open Safari then click “Safari” in the menu bar, and select “Private Browsing”.

Your cookies are reset each time you re-open an incognito window. So if you want to start with a clean slate for each flight search (so your previous searches aren’t “remembered”, potentially inflating costs), close all your incognito windows, open a new one, and then perform your flight search.

2. USE THE BEST FLIGHT SEARCH ENGINES

All search engines have inflated flight costs as part of taking a cut from the airlines. Some search engines (e.g. Expedia) consistently inflate much higher than others (listed below). It pays to familiarise yourself with sites that offer the best prices.

• Skyscanner (our #1 choice)
• Scott’s Cheap Flights (experts at finding sale & error fares)
• Skiplagged (a hidden city ticketing search engine – see tip #10)
• Airfarewatchdog (lists top sale & error fares from your city – see tip #6)
• Kiwi.com (combines all airlines to create routes that are cheaper than booking with just 1 airline – see tip #9. They also have a deals page.)
• CheapOair
• Momondo (a broad search engine that sometimes shows cheaper fares than Skyscanner)
• AirWander (lets you extend layovers into stopovers to visit 2 destinations with 1 trip – see tip #7)
• JetRadar (includes budget airlines, which many search engines don’t)
• Google Flights (good tool to quickly compare flight dates – not usually the best prices)

As of 2020, most budget airlines will now appear in the broad search engines we are recommending (but NOT Southwest). If you want to be 100% sure though, you can do an additional search for regional budget airlines (we’ve listed as many we know of further below).

Finally, no single search engine is consistently perfect (though we typically find the cheapest price on Skyscanner or Momondo). As such, you may need to try a combination of search engines to ensure you’re not missing any results. There doesn’t seem to be one that gets the cheapest flight 100% of the time.

3. IDENTIFY THE CHEAPEST DAY TO FLY OUT

While many theories exist around booking specifically on a Tuesday to save money, the reality is there is no consistent truth to exactly which days are cheapest to fly. Most of the time it is cheaper to leave on a weekday, though this isn’t always the case. Your best strategy is to get a quick visual of prices for a whole month to see what days are the cheapest for your specific route. Here’s how:

Step 1. Hop on the Skyscanner website or download the app

Step 2. Enter your departure & arrival cities

Step 3. Select “one-way” (even if flying round trip – you’re just determining the cheapest days to fly out first)

Step 4. On a computer: click “Depart” but instead of entering a date, select “Whole Month”, and then “Cheapest Month” so you can browse all dates to see which is cheapest. Hit “Search flights” to easily see which date is the cheapest.

In the mobile app: Tap the departure date, then change the view to “Chart”. You can easily swipe left and right to find the cheapest date, and tap on one of the bars to see the price.

Repeat these steps for your return flight if applicable. You can still book a round trip in one booking, but doing these steps first will let you see which dates are generally cheaper to fly in/out on for your round trip.

Kiwi.com and Google Flights work similarly to Skyscanner, plus they have map views as well, so you can see where the airport is. For tracking when and where is cheapest to fly, Hopper also offers price analysis and track fluctuations (i.e. when is best to fly).

4. FLY FOR FREE WITH POINTS

The cheapest flight you can book is free, and the easiest way to do that is with points. If you don’t have any, don’t fret – signing up for just one travel rewards credit card and hitting the minimum spend can land you a major points bonus, often enough for a free flight!

You can sign up for an airline rewards card that earns points with a particular airline, or a more general travel rewards card that lets you redeem points across a variety of airlines. As a beginner card, we recommend the Chase Sapphire Preferred Card. You can earn up to 80,000 in bonus points after spending $4,000 in the first 3 months after your account opening. That’s worth $1,000 when redeemed through Chase Ultimate Rewards, and more than enough for an international flight. And since it includes trip cancelation insurance, car rental collision damage waiver, lost luggage insurance, and no foreign transaction fees, it’s the perfect all-rounder travel credit card.

5. BEFRIEND BUDGET AIRLINES

Budget airlines offer significantly cheaper tickets than their full-service counterparts. It should be obvious, but this comes with compromises such as less leg room and no “free” food/drink on-board (which by the way, is normally covered in your higher-priced ticket with full-service airlines).

6. SEARCH FOR AIRLINE ERRORS AND SALE FARES

Airlines sometimes make mistakes when posting their fares, leading to seriously discounted flights. This can happen for various reasons – currency conversion mishaps, technical glitches, or human error. If you’re in the know-how on where to find airline error fares, you can save yourself hundreds of dollars on a ticket.

Other sites like Airfarewatchdog, Kiwi.com Deals, and Secret Flying are great resources to stalk for finding mistakes and sale pricing, as they conglomerate slashed ticket rates all in one spot. You can also read our detailed how-to guide which spells out how to find mistake fares on your own. One great approach is to search for flights for an entire month using Skyscanner (Tip #3 in this article). This will allow you to easily spot a significantly reduced fare against what’s displayed that month and has twice helped us stumble on error fares ourselves.

7. BOOK CONNECTING FLIGHTS YOURSELF FOR LESS

If you’re flying somewhere that involves a transfer, say from Canada to Australia which typically involves Canada to LA, then LA to Australia, consider that it may be cheaper to book these two legs separately on your own by adding another destination to your trip. It should go without saying that in doing this, you should not book tight layovers. I repeat: do not book layovers that are hours apart! This approach is for those who want to create an additional destination of a few days or more, before catching their next flight. The one exception is when booking with Kiwi.com, which offers its own guarantee on making connecting flights even when not with the same partner airlines.

First, do your research: are there budget airlines unique to the country you’re flying out of and where you’re headed to? Booking with a budget Australian airline (Jetstar) from Sydney to Honolulu, then an American one from Honolulu to Montreal saved us over $400 each when flying back from Australia to Canada earlier this year. This allowed us to create a thrifty five-day stopover in Hawaii on our way back, which was less exhausting and a lot cheaper! Kiwi.com and AirWander are both great search engines for revealing cheaper routes like this that involve multiple airlines.

8. FIND THE CHEAPEST PLACE TO FLY

Whether you know exactly where you’re going or you just want to find to the cheapest possible country to fly into, Kiwi.com is a great tool to get the wanderlust going and save some big bucks. Hop on their site and enter your departure city, then select a date range to fly. Approximate costs then appear over hundreds of countries around the globe from your departure point, while the list of destinations is sorted by price, allowing you to see the most cost-effective place you can fly.

9. MIX AND MATCH AIRLINES

Where Kiwi.com really shines is the way in which it mixes and matches airlines in order to find the cheapest price. For example, maybe you want to go to Rome, Italy from Washington, USA. A typical flight search engine will only suggest routes coming from a single airline and its partners. An example search on Expedia shows the cheapest route as $631.20 USD via TAP Portugal.

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!

Typically, booking a whole trip with different airlines would be risky. For example, let’s say your first flight with JetBlue was delayed, and you missed your connecting flight with Norwegian Air. Because the airlines have no association with each other, Norwegian Air has no obligation to reschedule your flight for free, so you would just lose your money. Kiwi.com instead offers its own guarantee, which covers schedule changes, flight delays, and cancellations. As long as you contact Kiwi.com as soon as you’re aware of the delay, they will provide you with an alternate connecting flight, or a full refund, at your discretion. We haven’t used this guarantee ourselves, but it certainly sounds like an appealing way to take the risk out of a thrifty flight hack!

10. CONSIDER HIDDEN CITY TICKETING

Travelers long ago discovered a trick known now as “hidden city” flights. In a nutshell, sometimes a flight that connects to a city you want to go to is cheaper than flying directly to it. So instead, you book that cheap flight that connects to your desired city and hop off there, not taking the ongoing connection.

It should go without saying this is risky for many reasons. Here are some factors to consider:

If your luggage is checked, it may go on to the final destination. For this reason, with hidden city ticketing it’s best to have carry-on luggage only.

You may not be allowed off the plane (if the same plane is continuing onward to its final destination).

Airlines may detect that you did not take your connection. The consequences of this are hard to say, especially since people miss flights all the time.

There is now a web search engine that finds hidden-city tickets for you. It’s called Skiplagged and was even sued by United Airlines who were angry about this debatable hack. We have never used the hidden city approach, but I know several who have, and they’ve scored some thrifty savings. Use at your own risk!

11. BUY FLIGHTS IN BULK

As a general rule, you will get better value on your flight tickets if you buy more at the same time, but only if they are with the same airline, or airlines in the same alliance (e.g. Star Alliance). For example, flying a return ticket from New York City to London with United Airlines will be cheaper than 2 one-way tickets.

You can also take advantage of this on multi-city flights. For example, Virgin Atlantic has routes from New York City to London, London to Shanghai, and Shanghai to New York City. If you book all these at the same time using the multi-city search function on Skyscanner, you’ll save some serious cash.

Another way to bulk buy flights for less is with round-the-world tickets and regional passes. These are special tickets offered by airline alliances that let you go around the world, a continent, or a country at a discounted rate. To learn how to book these, be sure to check out our ultimate guide to round-the-world tickets.

All this said, sometimes a few separately booked flights with budget airlines is still cheaper than what partner airlines can offer. The only way to be sure is to use a site like Skyscanner, punch in your destinations, search as multi-city or return vs multiple one-way bookings, and compare yourself.

12. DON’T FORGET ABOUT LOCAL AIRLINES

While the above search engines are great, they do not always include small airlines, especially in less popularly booked routes and/or in remote regions. If you’re flying somewhere obscure, Google searches and asks around if there exists a local airline.

13. IF YOU KNOW WHEN AND WHERE YOU’RE GOING, DON’T WAIT TO BOOK

Rarely ever do airline tickets get cheaper as your departure date approaches, especially if you need to fly on a certain date. Budget airlines typically offer low rates as a baseline price, and as these tickets sell, the remaining ones increase in cost. This is very typical in Europe and Australia. If you know when and where you’re going, don’t wait on an unknown sale. More often than not, your biggest savings come from booking far ahead when you can.

14. CHECK IF IT’S CHEAPER TO PAY IN OTHER CURRENCIES

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, such as the Chase Sapphire Preferred Card, otherwise your attempts to save money doing this will be lost! Our article on money matters for world travelers can help steer you in the right direction for the best credit cards for travel.