Easyjet, British Airways or Ryanair? Cost or comfort?
I fly frequently between London and Venice, with both budget and convenience as priorities. Here's some advice based on my experience:
Obviously flying from a UK airport which is convenient for your home will be important, and your choice of airline may be limited accordingly. I'll discuss the big three airlines below, but it's worth checking your regional airport schedules e.g. BMI Baby fly from East Midlands Airport to Venice.
From the London area you can choose between British Airways, Ryanair and Easyjet. (Alternatively, a new option flies from London City Airport but stops in Geneva en route, operated by an outfit called Baboo - read more).
British Airways fly to Venice Marco Polo from London Gatwick with a few additional flights from Heathrow. Easyjet also fly from London Gatwick to Venice Marco Polo; their terminal at Gatwick is more convenient for trains. Ryanair fly from London Stansted to Treviso, a bit further from Venice.
These three airlines all operate several flights a day, giving you a reasonable range of times to choose from.
British Airways - BA is still the most comfortable option, and it is my first choice. The atmosphere at the bag drop/check-in desks and at the departure gate is calm, with no tension or frantic queueing - and, it has to be said, frequently a quieter class of customer including business travellers and frequent flyers. BA's staff are helpful and polite, the seats are a bit more comfortable than the budget airlines and you get better treatment at the airports with better departure gates and easier aeroplane access. On board you will still receive a tiny snack and free drinks. There is often a fair bit of space on the plane.
BA's prices are actually very competitive on this route, especially considering that you can check in luggage free. Their website quotes you the full price with no sneaky extras, provided you pay with a debit card. Compare the difference between booking two single flights and a return, as the prices of the legs can vary. You can book a single from around £50. Keep an eye on the newspapers, as the threat of strikes is a disadvantage at present.
Easyjet - Like BA, Easyjet fly from Gatwick to Marco Polo, Venice's local airport. I would say they are the second most comfortable option. Sometimes their prices are good value, sometimes higher than BA. I only choose Easyjet when there is a significant saving to be made. Easyjet add on extras during the booking process, and you must pay for hold luggage. Their carry-on rules are slightly more generous than Ryanair, though you must still only bring one item. I pay for 'speedy boarding' if I have a flight case, as it means I can board first, choose a seat and stow my case in the overhead locker without fighting for space.
Ryanair - You can still sometimes pick up a true bargain with Ryanair, though you won't get an accurate price until you've progressed through all the extra charges they add on. The aeroplanes are cramped and the constant selling and their attitude to customers can be very irritating. However, I've found their flights quite reliable and if I find a very cheap offer, I will still fly with Ryanair. They fly from Stansted to Treviso, which is something to bear in mind (I'll discuss this below).
Which London Airport? This depends on your transport options. For me, Gatwick is cheaper to reach than Stansted, thanks to the First Capital Connect train service. Both the Gatwick Express and Stansted Express will add significantly to your journey cost, so consider the cost of reaching the airport as well as the price of the actual flight.
Which Venice airport? Venice Marco Polo is a 20-minute bus ride from Venice, with both express and regular city buses into Venice, costing €3 and €2 respectively. There are also ferries operating to different points in the historic centre. Venice Treviso is a 50-minute bus journey away, with ATVO buses meeting the flights at a cost of €9 return. Marco Polo is more convenient, and has a larger and better equipped terminal building. Treviso can get very uncomfortable, especially if there are several flights departing in a short space of time. I would suggest you book priority boarding for your return flight as Treviso's departure gates are cramped and queues are disorderly.
The biggest difference is in winter. Even if Ryanair flights to Treviso are cheap, I still have a preference for Easyjet/BA. The Venice area is prone to cold foggy weather, and in my experience Treviso flights are more likely to be cancelled (I believe this is because the airport has a short runway and less hi-tech equipment). If you're arriving, this could mean a diversion to somewhere miles away like Bergamo; if you're departing your flight will simply be cancelled. If - as happened to me before Christmas - you are struggling through the Veneto snow to reach the airport, Marco Polo is much more accessible.
I've had flights cancelled by each of these three airlines and wasn't particularly impressed by the customer service shown by any of them. British Airways are theoretically more contactable than cost-cutting Ryanair or Easyjet, but I've still had trouble getting through on the phone. All the airlines rebooked me on another flight free of charge; Easyjet were chaotic but finally sent some passengers to a hotel overnight (I recommend contacting them on Twitter in emergencies; BA were very charming when I did manage to get through on the phone.
To summarise: cost is the biggest factor and you should always compare their prices - sometimes BA is actually cheapest. Factor in associated travel costs and additional charges. And consider whether it is worth paying a bit more for perks like a more tranquil flight, or a better-equipped airport. Look at single as well as return flights. These are more flexible and you may find your cheapest option is - for example - to fly out to Venice with BA but back with Easyjet.
As a final comment, after years of low-cost flying, I try to avoid early morning flights (inconvenient travel to the airport, sleep disruption and - in the winter - more chance of bad weather delays). I also prefer not to take a late evening flight when onward travel is a problem (sometimes Ryanair flights deliver you to Stansted too late for the last train) or in the winter when there's a possibility ice or snow might cripple services. And of course it is much, much better to fly with hand luggage only. It's cheaper and saves you from lengthy queueing at check-in or bag-drop desks - you can just head straight through security with your online check-in printout. And if you wait till last, or pay for priority/speedy boarding, you won't have to queue at the departure gate either.
The good news is that Venice is wonderful all year round and that you can find return flights for £80 or less if you book in advance and shop around.
> Italy Heaven's guide to Venice
> Venice Marco Polo Airport
> Venice Treviso Airport
> British Airways
> UK - Italy flights