Few things are more satisfying when planning a trip than landing cheap flights.
When it comes to finding a seat on domestic or international routes, there are often plenty of good deals on offer.
The only issue can be finding them.
Here are some of the best sites for finding cheap flights in 2025.

Kiwi.com

Kiwi.com is one of the best flight booking sites we’ve found, perfect for travellers who like to travel hack.
One of their tag lines is, “We hack the system, you fly for less”.
Of course, they don’t hack any systems - they just find you the best deals and hacks that other websites don’t.
Kiwi.com has so many great tools to uncover cheap flight deals.
Some of these include:

The ability to book return flights with different airlines. For example, taking an outbound flight to Singapore with Singapore Airlines and returning on Qantas.
Pricing tables and trends. These allow you to quickly see the cheapest days to fly within three days on either side of your intended departure and return dates.
Best, Cheapest, Fastest. These tabs at the top of the results pages allow you to sort options by what matters most to you. If you want the cheapest option, select ‘Cheapest’. If you don’t want to stuff around in getting to your destination, choose ‘Fastest’. The ‘Best’ option provides a balance.
Price Alerts. If you want to monitor prices for a trip you are planning, hit the ‘Set up price alerts’ button to receive alerts when prices for a route change.
Fly ‘Anywhere’. If you have some annual leave booked but are looking for inspiration on where to go, you can put your departure airport in the ‘From’ box and ‘Anywhere’ in the ‘To’ box to search for the cheapest seats on domestic and international routes worldwide.
Return ‘Anytime’. If you are not on a tight schedule for your trip, you can find cheaper seats by leaving the return date box blank during your search. This will find the best options for a range of trip lengths, whether it be for five nights or 20 nights away.
Price lock. If you find a great deal but are not quite ready to book, you can lock the price for up to 72 hours for a small fee. You will pay the new, lower price if the price drops further during that time.

Find cheap flight deals and hacks on Kiwi.com

There are also some ‘hacks’ on Kiwi.com which you won’t find on other sites, including:

Self-Transfer hack. This allows you to book individual flight legs with the same or different airlines for layovers if you are willing to collect your bags and check in again.
Hidden city hack. Airlines might sometimes offer cheaper pricing for a multi-leg flight than a single-leg flight. This hack helps you find such situations. For example, if a flight from Sydney to Phuket (via Singapore) is cheaper than the same seat from Sydney to Singapore, you can book the flight to Phuket and get off in Singapore if you are travelling with only carry-on luggage.
Throwaway ticketing. Airlines can sometimes offer return tickets for less than one-way tickets on international routes. This hack helps you find those offers more easily and ‘throw away’ your return ticket if you are taking an extended trip and are not sure when you’ll be back.

Overall, Kiwi.com is a great website to check out if you are searching for cheap flights.

Skyscanner

Skyscanner is one of the best-known flight search engines.
It searches and compares seat prices across many different booking websites to help you find the best deals.
Prices can vary between different booking sites, which is why Skyscanner can be a valuable tool.
For example, in March 2025, when we searched for a return flight between Sydney (SYD) and London (LHR) in Economy on Etihad Airlines, Skyscanner found one website where we could book for $1346.
Etihad’s own website was offering the same seat for $1501.
That’s a handy saving of $155 – or 11.5 per cent per return ticket.

Google Flights

Like Skyscanner, Google Flights lets you compare prices across many flight booking sites.
It can also show you historical pricing for a specific flight and whether pricing is currently low, normal or high.
Additionally, you can track prices through email notifications.
Bookings are not made through Google, with Google Flights instead forwarding you to airline or travel company websites to lock in the deal.

Other best sites for finding cheap flights

In addition to the three websites listed above, there are a few other options.
Momondo is another popular website and is very similar to Skyscanner.
If you are also looking to book accomodation, packaging your flights and accomodation together through Expedia can be a great way to save.
If you have lots of points, you could consider saving your money and using Qanatas or Velocity points to book flights on both domestic and international routes.

Summary

Kiwi.com offers unique search options like “Anywhere” and “Anytime” to find deals, along with opening up travel hacks for one-way and multi-leg trips. Skyscanner and Google Flights are other handy flight search engines that search and compare prices across different travel websites to help you find cheap flight deals.

Written By: Chris
Updated: October 2024

FREQUENTLY ASKED QUESTIONS

Comparison websites like Skyscanner and Google Flights are great options for finding cheap flights. Kiwi.com is another top travel website, offering a unique set of options that can help you snag some amazing deals.
Skyscanner and Google Flights both search many travel websites to help you find a great deal. Often, pricing on some booking sites is less than if you were to book directly with the airline you intend to fly with.
We have written before about The best ways to find cheap flights. Some of these include using comparison websites, travelling on the cheapest days and considering alternative airports.
Kiwi.com allows you to easily find and make use of travel hacks, including throwaway ticketing for cheaper one-way flights, ‘hidden city’ options if you are just travelling with carry-on luggage and ‘self-transfer’ hacks if you are willing to stuff around a little during a lay-over to save a stack of money. Booking flights with travel websites – rather than directly with airlines – can be another good way to save.