Get the answers to FAQs on flights, then compare prices to find the right deal for you.
Before booking a flight consider:
Read more in our beginners' guide to buying a flight.
Types of flight to choose from include:
In addition to your destination and route, also consider the type of airline that's right for you:
An airline will typically charge between five and 15 different prices for the same seat over the course of its shelf life.
Advance prices will be lower, and as the flight fills up prices will increase. However, as the departure date looms airlines are likely to drop their prices dramatically in order to fill space.
All circumstances will vary, but there's a legend that exactly 21 days prior to departure is the best time to book for the cheapest deals, as it's at this point airlines may take stock of their empty seats and lower prices accordingly.
It also tends to be mid-week when airlines look at shifting remaining seats for upcoming flights, so consider looking on a Tuesday or Wednesday afternoon.
Flying late at night or very early morning will often mean routes are less crowded, but this can mean extended airport stays or arriving after or before hotel check-in.
Airlines need to maintain a schedule during off peak times - try to make your weekend trip happen during the week and you may get a cheaper and quieter flight.
It's possible that taking indirect routes and making long stopovers will reduce airfares. The downside, however, is that the extra time spent on the plane or in an airport might reduce the length of your holiday.
If you're travelling on a 'through' ticket and your connection is missed, the airline is obliged to source a seat on the next available flight and pay for expenses and overnight accommodation.
But if you book the flights either side of a stopover individually, the airline is under no obligation and your travel insurance probably won't cover you either.
Credit cards provide you with additional cover should the airline go bust under the Consumer Credit Act, but remember that you may be charged interest if you don't pay off the balance in full at the end of the month.
If your flight is delayed you may be entitled to compensation under EU rules.
Air miles cards allow you to collect air or flying miles as you spend, the rewards to be used either with one specific airline or in more general travel points schemes such as Avios.
Many airlines offer an online check-in option before the day of the flight to ease queuing at the airport, and for some airlines it's a requirement. Always double check with your flight provider and remember that there may be a cut-off point after which you can't complete an online check-in.
See if you can find the answers in our flight guides.