Whether short or long haul, it's one of the most climate-wrecking modes of transport.
The solution is to choose other ways to travel, and to holiday closer to home. But where to start when you're looking for an affordable, environmentally friendly holiday?
Whether you're looking for adventure or relaxation, we've got 21 ideas here for amazing, unique holidays with not a plane in sight.
And if you want to make your local travelling greener, we’ve got ideas for that too.
Camping and caravanning
There's nothing like camping to help you slow the pace and reconnect with nature. Whatever your preference - from glamping in a yurt to a simple family tent - camping is always great fun.
Start your search for great campsites with the Camping & Caravanning Club. See our range of camping gear and get experts' recommendations from our camping books.
Stay local, go global
Get a taste of other countries without even leaving the UK - you might be surprised by some of the UK's most stunning landscapes.
Large cities are particularly good for enjoying the rich experiences of other cultures. London alone has the largest Chinese New Year festival outside China.
Other celebrations include Vaisakhi (Sikh New Year), Diwali (the Hindu Festival of Lights) and the Shubbak festival of Arab culture.
For festivals of all kinds try Visit Britain.
Whether you're looking for family-friendly routes, or challenging terrain for mountain biking, UK cyclists are spoilt for choice. Check the Guardian's best bike rides.
If you're planning to travel by rail to destinations in the UK and Europe, find out more about how to take your bike by train.
For an amazing and cheap 'no-fly' holiday, take the ferry over to the Hook of Holland then cycle to Amsterdam. Cycling in the Netherlands is beautiful: segregated cycle lanes alongside canals, through fields, forests and along beaches. You'll just need your normal commuter bike, some panniers and flat roads. Bicycle friends let cyclists stay in their spare rooms for a modest fee.
Fancy a really big trip? Read the amazing story of a single-handed bike ride taking 18 months, in Chris Smith's cycle to China.
Try something new
Do you want to learn a new skill, or introduce the kids to a different experience? Whether it's map-reading, survival skills, cookery, or painting watercolours, the chances are there's a specialist company that will cater to your need. Get googling and book a holiday you won't forget. Lying on a beach never looked so dull.
Canals and rivers
For some, canal boats are merely a means of transport between one lock-keeper’s pub and the next. But canals throughout the UK also offer a chance for anyone to enjoy a slower, more relaxing way of life. Find out more with the Canal & River Trust.
European rivers and waterways, including the Rhine and Dordogne, also offer excellent wildlife, and the chance to explore towns and villages along the riverbanks. Find out more about cruising on European canals.
Europe by Eurostar
Eurostar makes holidays by train an affordable and attractive possibility. Travel by train is usually far less stressful than flying, and allows us to savour the journey, as well as the destination. Champagne and a fancy picnic on the train make the journey feel like part of the holiday.
For rail travel to Europe and beyond, www.seat61.com is a fantastic resource. Be inspired by the amazing variety of destinations, and find all the advice you need to plan a memorable holiday.
Choose from destinations including Rome, Venice, Florence, Sardinia and Lake Garda – just hop on Eurostar to Paris, then get an overnight train.
If you can't decide on a destination, how about:
- London to Frankfurt - just 5.5 hours on the train. Deutsche Bahn do a really good London-Spezial* ticket – this was originally meant for Germans traveling to London, but also works the other way round. This gets you from London to any German station and back at a great price. (*The site is in German but should open with a “Translate” option.)
- Corsica - you can get there by train to Nice (via Paris) and boat, and travel around the island by train too.
- Visiting medieval fortress of Carcassonne, then on to Montpellier to see flamingoes on the south coast of France.
Museums and galleries
Lottery funding has provided regional cities with some magnificent visitor attractions. Find some of the best in The Independent's 50 best museums and galleries, and soak up the culture.
The UK is a seafaring nation of islands where canoeing, rock climbing, hill walking, birdwatching, scrambling, swimming, and even whisky-tasting are all on offer.
Even a trip to the Lake District will introduce children to the inland island-hopping adventures of Arthur Ransome's 'Swallows and Amazons'. See TripAdvisor's top 10 UK island destinations.
Europe also boasts countless islands reachable by train and boat. All you have to do is choose what you want from your holiday - from heat, sand, and centuries of rich history in southern Europe, to the midnight sun and watersports in Sweden.
Beaches - not just for sunbathing
There are fabulous beaches all over Europe, including in the UK, Denmark, France, Spain, Italy, Croatia and Turkey, all reachable by train.
If you're not one for sunbathing, how about exploring what's under the water? Try these snorkelling spots.
Getting back to nature
Treehouses, yurts, hand-delivered breakfast hampers, treetop bathtubs – if that's your idea of a great holiday, try the great guys at Canopy and Stars for some naturally inspired, quirky accommodation.
Organised walking holidays are a wonderful way to make the most of a short holiday. You can book hotels in advance, and have your luggage sent on ahead, then carry little more on your walk than lunch and plasters.
For UK breaks, including weekend rambles, see The Independent's 50 best walking holidays.
By train, Europe has plenty to offer, with both easy and more ambitious terrains. Suitable destinations include the Pyrenees and the Swiss, Italian and Julian Alps. Get ideas for self-guided walks with On foot holidays.
Conservation work and farming
Holiday parks are a great solution if your group or family have different interests, as they offer such varied activities and entertainment. There are hundreds around the UK, but you can get an idea of what's on offer with Forest Holidays, Center Parcs or Bluestone Wales, a Center Parcs-style resort in the Pembrokeshire National Park.
Once you've decided where you want to holiday, check TripAdvisor for a more comprehensive list of holiday parks, including smaller independent parks, along with invaluable customer reviews.