Flights are often the biggest cost of a holiday, so finding cheap ones can make a real difference to your budget. With a few savvy tactics, you can cut the price considerably without much effort. This guide explains how to find cheap flights from the UK, from being flexible to using the right tools and avoiding hidden extras. A little flexibility and know-how is the surest way to a bargain fare.
Be flexible on your dates
Flexibility on dates is the single biggest money-saver for flights. Prices vary enormously depending on the day, with flights on some days far cheaper than others, so if you can shift your trip by a day or two, or travel midweek rather than at the weekend, you can save a great deal. Avoiding peak departure days, school holidays and popular weekends makes a big difference. If your dates are not fixed, use flexible date searches to find the cheapest options, as a small change can cut the fare significantly.
Be flexible on airports
Where you fly from and to also affects the price. The UK has many airports, and flying from a different one, or to an alternative airport near your destination, can be cheaper. Compare nearby airports at both ends, factoring in the cost and time of getting to and from them. Sometimes a slightly less convenient airport saves enough to be worthwhile. Being open about which airports you use, rather than defaulting to the nearest, widens your options and often uncovers a cheaper fare for essentially the same trip.
Book at the right time
Timing your booking well can save money. Booking too late usually means higher fares, while booking very far ahead is not always cheapest either, so there is often a sweet spot in between. Our guide on the cheapest time to book flights explores this in detail. Avoiding last-minute booking, when fares tend to be highest, and keeping an eye on prices over time, helps you book when the fare is reasonable rather than paying a premium for leaving it too late.
Use flight comparison tools
Flight comparison sites and search engines are invaluable, letting you quickly compare fares across many airlines and dates. Use them to see the cheapest options, explore flexible dates, and spot which airports and days are cheapest. Checking more than one tool helps, as no single one always has every fare. These tools do the hard work of scanning the market for you, making it easy to find the lowest fares available for your route. They are the natural starting point for any flight search.
Set up price alerts
Price alerts let you track the fare for a specific route and be notified when it drops, so you can book at a low point rather than guessing. Setting up alerts for your chosen trip means you do not have to keep checking manually, and you can pounce when a good price appears. This takes the guesswork out of timing and helps you react to real price movements. For a trip you are planning ahead, alerts are one of the most reliable ways to catch a cheaper fare. They are especially useful for trips you are planning well ahead, when there is time for prices to rise and fall before you need to commit.
Consider budget airlines, but watch the extras
Budget airlines often offer the lowest headline fares, which can be excellent value, but their low prices usually exclude extras like baggage, seat selection and food, which add up quickly. A cheap base fare can become expensive once you add a hold bag and other extras. Our guide on hold luggage weight limits and fees explains the baggage costs. Comparing the true total cost, including the extras you need, rather than just the headline fare, tells you whether a budget airline is genuinely cheaper.
Fly at less popular times
Flights at unsociable or less popular times, such as early morning, late evening or midweek, are often cheaper than convenient daytime and weekend departures. If you are willing to fly at a less convenient time, you can save money. Early and late flights also tend to have shorter airport queues. Weighing the saving against the inconvenience helps you decide, but for the budget-conscious, choosing a less popular departure time is a simple way to bring the fare down without changing your destination or dates much.
Be flexible on your destination
If you are open-minded about where to go, flexibility on destination unlocks the cheapest fares of all. Many flight search tools let you search for the cheapest destinations from your airport, so you can let the bargains guide where you holiday. This works well if you simply want a good-value trip somewhere sunny or interesting. Our guide on finding cheap holiday deals takes this further. Being led by price rather than fixing on one destination can result in a fantastic, far cheaper trip.
Watch the add-on costs
Finally, always look beyond the headline fare to the true cost, as baggage fees, seat selection, check-in charges and other extras can turn a cheap flight into an expensive one. Compare flights on the total you will actually pay, including everything you need. Our guide on hand luggage rules and allowances helps you avoid baggage surprises. Being alert to the add-ons, and factoring them in when comparing, ensures the flight you book is genuinely cheap rather than just cheap-looking before the extras are added.
Book flights and accommodation together or separately
Sometimes booking flights as part of a package with accommodation works out cheaper than buying them alone, while other times booking flights separately and arranging accommodation yourself is better value. It is worth comparing both for your trip. Our guide on finding cheap holiday deals covers packages versus booking separately. Checking whether your flights are cheaper as a standalone purchase or bundled into a package, rather than assuming one is always better, can reveal a meaningful saving on the overall cost of your trip.
Use the tools to your advantage
Beyond basic comparison, many flight search tools offer features that help you save, such as showing the cheapest month to fly, mapping the cheapest destinations from your airport, or highlighting nearby airports. Using these features rather than just searching a single fixed route opens up cheaper possibilities. Taking a little time to explore what the search tools can do, and letting them surface the cheapest dates, destinations and airports, turns them from a simple price checker into a powerful way to find genuinely cheap flights.
In short
To find cheap flights from the UK, be flexible on dates, airports and even destination, book at the right time rather than last minute, and use comparison tools and price alerts to track fares. Consider budget airlines but always compare the true total including baggage and extras, and fly at less popular times to save more. A little flexibility and research is the surest way to a cheap flight without sacrificing the trip you want, so use the tools, set a target price, and be ready to book when a genuine bargain appears rather than paying whatever the standard fare happens to be.
Explore more travel advice in our Flights & Getting There guides.