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The cheapest day to book flights is Sunday, with savings of up to 15% available on average compared with flight booking on Friday, the most expensive day, according to historical data*.

Buying flight tickets is typically best well in advance of departure. For economy class, domestic flights start to get more expensive 35 days before departure, while international flights increase about 21 days before departure*. It works a bit differently for premium plane tickets, with prices generally increasing about 42 days before departure for domestic flights. For premium international flights, it's generally best to book no less than 63 days in advance for the best deals.*

Friday tends to be the cheapest day to fly, while the most expensive day is Tuesday. Flying on a Friday instead of a Tuesday can potentially lead to savings of up to 15% on average according to historical data.*

According to historical data, September is the cheapest month to fly internationally, and October is the cheapest month to fly domestically. Booking international September flights rather than in December can offer savings of up to 41.5%, while booking domestic October flights rather than in March can offer savings of up to 35.8%*.

You should book a flight 42 days in advance if you're flying domestically and opting for premium tickets, because prices tend to increase less than 42 days prior to departure, according to historical data*. For domestic economy tickets, prices start to increase about 35 days before departure. International flights should be booked 63 days ahead for premium tickets and 21 days ahead for economy tickets*.

You can browse a variety of cheap flights available on Expedia, which lists all prices and fare types right on the search results page. All you have to do is input your travel dates as well as any other factors like cabin class, and the flight search makes flight comparisons easy. Becoming a member (it's free) also allows you to earn rewards on eligible bookings that can be put towards other flights alongside hotel bookings, car hires and some activities.

Comparing prices is the best way to find the lowest airfare, and Expedia allows you to do it at a glance with various fare types displayed on your search results page. According to trends, you may also be able to save by booking your flight on a Sunday*. Additionally, you may want to search for flights within a certain budget, such as cheap flights under £300.

It's generally not a good idea to buy a plane ticket at the last minute because there may not be a ticket available when booking so close to departure. Also, prices tend to increase the closer you get to your departure date as availability decreases. Travelling with flexible dates will increase your chances of finding good deals on last-minute flights. You can also always go straight to Expedia's cheap flights deals.

Booking with Expedia is easy, as all you have to do is input your departure destination and arrival destination along with the dates of your trip. Then, all the flights available for those conditions will be displayed. You can utilise a variety of filters to narrow the search, including filters for budget, cabin class, multi-city, one-way and more. There are additional options to add a car hire or hotel to your booking for potential package deals.

Several factors are essential when booking a flight, including flight times, stopovers, luggage policies and airlines. Fortunately, you can set preferences for these features and check each individual flight for all its relevant policies before you finalise your booking. Don't forget to check the destination airport as well to make sure it's the closest one to your ultimate destination.

Prices are constantly shifting, but flights to Tenerife tend to be fairly affordable when you're looking for flights from Heathrow or flights from London , along with flights to Stockholm and flights to Dublin.

If you're looking for a warm destination, flights to Ibiza tend to be relatively affordable, though you can also enjoy flights to Milan outside of winter.

Yes, cancellation is available from your itinerary page on Expedia after your booking. Keep in mind that several flights are fully refundable and are marked as such with green text, so keep an eye out for that (or search for it specifically) if you want peace of mind when booking.

Booking with Expedia allows you to browse a vast selection of flights to everywhere all over the world complete with search filters that make it easy to narrow your search and compare flights. Our flight finder is just the beginning, however, as we also offer hotels, car hires and activities at your one-stop shop for travel planning.