There are two Ferry operators from Dover that sail to Calais; P & O and Sea France.
On weekend trips on the two ferries from Dover to Calais, the price difference isn't a lot.  For a particular weekend, taking the cheapest option - leaving Dover on Friday and returning on Sunday/Monday - a P & O ticket will cost you: £56 and the same trip with Sea France is £53.  That’s just to give you an idea.  For a week return, the difference could be a bit more.

The top ticket i.e. including a club pass; for P & O is £98 and Sea France £85.  Sea France do 15 trips from Dover to Calais a day and vice versa whilst P & O have 25 daily crossings.  

Both sets of fleets that make the trip are have enough utilities and amenities to cater for surely everyone and make it in roughly the same time (1 hour and ten minutes) so the choice of who to go with can come down to the toss of a coin.

 P&O do have a longer standing reputation and have built themselves up to become Britain’s largest Ferry company.  But to completely disregard Sea France would be foolish, they offer  just as a good service. 

Below is a sample timetable for P&O for their daily routes from Dover to Calais.  The times do vary, not by much - but when it’s the matter of messing a holiday then it can be very important!  Also, on some days it is important to note that not all sailings leave. 

A.M.	02:10	03:20	04:30	05:30	06:25
	07:55	08:40	09:25	10:05	10:50
P.M.	12:55	13:00	13:45	14:25	15:10
	16:35	17:20	18:05	18:45	19:30
	20:55	21:40	22:25	23:10	23:59

Below is the Sea France timetable, the same rules apply to this timetable as the P&O one i.e. not all scheduled sailings will leave everyday.

A.M.	02:00	04:45	07:00	08:15	09:30
	11:00
P.M.		12:15	13:45	15:15	16:30
	18:00	19:30	20:45	22:30	23:45

Prices; P&O tends to be dearer that Sea France, although the old adage is true "you get what you pay for" - as P&O are one of the oldest and best established fleets going.  But if you're just needing to get to Calais then Sea Ferries should suit you fine. 
For a return of a couple of days to a week P&O will cost you around £85-90 and Sea France around £50-60.

	P&O Ferries Sail to France or a number of excellent destination within Europe with P&O ferries, discover the huge amount of ports which this UK operator sails into! Find a port near you and start planning your break! P&O are a massive and well respected ferry operator for many years offering customers the best possible service!
	The Trainline Choose from some excellent offers on train tickets in all the countries and destinations you will be visiting! Travel through the country by train and discover more about the country - this is a comfortable and easy way to travel to any of your favourite destinations!

I suppose if you whittle it down you could categorize your choice this way: if you are going on a holiday and you intend to relax then you could spend the extra bit of and book with P & O. 
But if you are just needing to get to France, and say just sleeping on the boat, then you could save yourself the couple of pounds and go with Sea France.

We have great information on a number of ferry operators and leaving from a number of UK ports! Learn more about all your ferry options!

UK leading ports
Discover more about the main ports in the UK - Where they are located and where they sail

Cross channel routes
If you are thinking about sailing cross channel - learn of the best ports and routes from the UK

Ferries to Europe
Venture a little further afield - Travel to northern or southern Europe for a holiday or mini cruise!

Best UK operators
Learn of the best ferry operators in the UK - what they offer and where they sail!

Holiday ferries
Why not arrange your holiday for a ferry break - winter or summer your needs can be catered for!
Dover - Calais operators
Choose form a range of excellent operators which sail from the UK port to the French port!