Taxis in Cairo comes in different colors in fact not only in Cairo but also in Luxor and Aswan -- AC and non-AC, there's the ancient black ones, the black&whites, and the yellow ones with aircon. I have tried all of them. Either you agree on a price or ask to flag down the meter.
There are 3 types of taxi drivers -- one, someone who cons on tourists, two, who cons on people but won't cuz he feels you're well informed (act like one), three, honest ones.
On my first day I took the Metro (EGP1) to Giza station, then a taxi from Giza metro station to the Pyramids entrance metered at a price of EGP20 incl. tip (they usually ask for that or you might feel generous not getting the small change). Coming back from the pyramids to Giza station at metered too a little less at 17.
From Tahrir Square (downtown) to the Citadel, I paid EGP20 on a meter. Coming back from the pyramid to Khan ElKhalili at EGP15. Then, from Khan El Khalili to Tahrir Square at EGP10, there was a time that it cost only 7 and once 5 (short distance).
But going to the airport I made the stupid decision to take the metro and got off at a very unpleasant area called New Marg and found it hard to find a taxi from there to the airport that I almost missed my flight. The ancient black taxi I took somehow I felt like he took so many roads to make the meter collect more fares, so I ended up paying 30 inclusive of tip.
Most taxi drivers do not speak English so be prepared. Don’t sit infront if you’re not prepared to have a conversation. I normally sit in front as I got used my place and other countries, but I’m armed with basic Arabic. Also, if you sit infront, buckle-up, they drive really like crazy - I got several, what do you call those stinging feeling on your crotch everytime the car swerve fast on a hairline distance to another car? But don't start an argument, that driving is a norm. Sit there, relax...and pray?
Always...always...agree on a price before getting into a taxi or ask the driver for the meter. A short distance would only cost you EGP5 (normal local fare), but it depends on you – the more they feel that you’re uninitiated, the more they feel that they could con on you.
Taxi's are out of control in Cairo, they are everywhere, and believe me they come alive when they see a foreigner coming. Suddenly they all speak English, French, German, whatever language you think. Just like in Far East ask your hotel to write the name of your hotel in Arabic, but no sooner that you approach a taxi 10 of them come out of nowhere. They don't mean any danger, they just want to make some money. Have an idea of the fare you are expected to pay and don't be afraid to haggle for the price. We jumped in taxi's at all times and not once we felt taken advantage of or any danger. At your hotel they try to send you in a hotel taxi that will charge you almost double of what your gonna pay with a regular taxi. The only time we did this was on a Saturday night when we were nicely dressed and need a taxi with a working AC otherwise a regular taxi is OK....if going to the airport (see my other transportation tip)
Cairo has just been given a new taxi system. Instead of the old rackety black and white taxis, there is a new fleet of City cabs, pale yellow in colour or  white with a chequered black and white trim. The new cabs are airconditioned, comfortable and with electronic metres, so no need to bargain over the fare. The basic charge is 3.50 EP, then 1EP per kilometre. The drivers tend be more respectful, rarely smoke or make chit chat, and don't turn on the radio .
Taxis tend to be the preferred mode of transportation for foreign visitors. Hotel taxis are more expensive than the black and white cabs that are hailed on the street. Some taxis have meters, but don't expect them to work. Set a price before you get in, and don't pay until you arrive at your destination. However, don't haggle, or you'll never get to where you're going. If you don't like the price, take the next taxi. Fares are paid only in cash and in Egyptian pounds, and it's not unusual to ask the driver to meet you at an appointed hour and place for the return trip. Tipping is not customary. Ask your hotel concierge or tour guide about average prices. Also, it is common practice for taxis to pick up extra passengers traveling in the same direction, so don't be alarmed if your group grows.
I love taking taxis. It's so crazy! The way they drive in Cairo could give the faint at heart fits. But I was determined to figure out this insanity by watching the traffic and the taxi driver's. The driver's don't seem to ever get their feathers ruffled. The cacophony of music from the horn's being blown, the weaving in and out of traffic, turning 2 lanes into 3, 3 into 4. It just amazed me.
Taxis are a very convenient mean of transportation in and around Cairo. They are practically everywhere, just walk out on the street for a few minutes and you can be sure to find one. There are several types, the most common one is the old black and white taxi. Those usually don't have a meter, so be sure to haggle about the price before you get in! The newer ones are either white or yellow. Those have an operating meter, so just get in and enjoy the ride :).
If you are new to Cairo, don't speak Arabic and don't know about Taxi prices, please consider this:
If you get into a taxi in front of a hotel or tourist attraction you will be overcharged. So make sure you always walk a couple of minutes!
From my experience I can say that you should NEVER pay more than 60 EGP to go anywhere in Greater Cairo. No matter how much the driver complains that the place you are going is very far, just walk away if he is trying to overcharge!
This amount is also valid for the taxis with the meter! Some drivers mess with them, so they'll run faster, keep this in mind!
Taxis in Cairo are mostly black & white, old, dirty but cheap. For a common travel inside the city you should pay around 10 LE. Obviously expect to negotiate and the driver to ask for a tip.
To go to the Pyramids from the Egyptian Museum (one-way) I paid 35 LE, after the usual negotiation.
We never experienced getting ripped off by a taxi driver simply because my husband speaks Arabic. Most of the drivers are all corteous adn never demand for a tip.
Just be aware that taxi's in Cairo are really very old and no airconditioning at all. The colors of the taxi's are usually black anfd white.
You may also check with the hotel/hostel. They can give you some recommendations and these drivers, with such "connection" with the hotel/hostel won't be too bad. The price we took in Jan 2009 for a whole day trip, from Cairo to Saqqara/Dahshur/Giza and then back to Cairo was 200LE.
Taxis are the best and most reliable was to get around the city of Cairo and while the appearance of most taxis aren't exactly encouraging from a safety perspective I'm living proof that you can live through a taxi cab ride through Cairo. Most of the taxis are as ancient as the Pyramids themselves and the seat belts and other important safety features have long since stopped working. But the safety is in the fact the streets of Cairo are so crowded the taxi can't go very fast...its mostly stop and go. The most important aspect of taking a taxi is making sure to negotiate the price BEFORE you get into the cab. Pretty much every cab driver will overcharge foreigners so its important to have idea of how much you should pay. From downtown Cairo a taxi cab to the airport should not be more than 70 to 80 LE.....a cab to the Pyramids from downtown should be exactly 50 LE...otherwise plan about 20 LE for most other destinations.
Seems to me that taxis in Cairo have different colours but Black&White looks like very plenty in the Giza City. If you are travelling to the Khan el-Khalili or any museum which is close or near your hotel, I can recommend the Black & White taxi.
Most taxi drivers are good and friendly. I guess some are not. I used a private car with a driver during my stay in Cairo but I made use of the B/W taxi quite a few times for short distances and to the airport.
Black & White taxi is cheap.
We scheduled a trip with cairotaxi.com and they never showed to pick us up. I would avoid using their service.
There are lots of taxis at the airport, just make sure you pay the driver not the "broker" who will show you to the cab.
Hail a black and white cab anywhere around Cairo as fares are very cheap! Try and get an idea of what your journey will cost through your hotel as fares for locals and visitors vary quite a lot!! Most people will say that you must establish the fare with the driver before you get in, whereas many experienced taxi takers will never agree on a price, but just pay the driver at the end of the trip, no questions asked! I, as an inexperienced taxi taker in Cairo agreed on the fare before getting in and soon got to know what to pay more or less. If drivers want to rip you off badly, just tell them "no" and hail another cab - they will either relent and say "ok" or will just drive off.
From our hotel on the Giza side of the Nile, we started off by paying 20-25LE to the centre (Khan al Khalili), but soon realised the fare was more realistic at 10LE (probably 5LE to locals) - our journey time was approx. 15 mins according to traffic. Most people say to pay 10LE to most downtown destinations and I think we paid 25LE to the Citadel which was quite far from our hotel.
To hire a cab for the day, you can pay as a tourist anything from 120LE - 300LE or more if you have a guide. We organised a cab to Saqqara, Memphis and Dashur through the hotel for 170LE which is not bad and 70LE to the Giza Sound and Light Show (3 hrs in total as driver waited for us while we watched the show, plus travelling time).
You first experience in a Cariene taxi will likely be a bit hair raising. It's a little like growing accustomed to riding a rollercoaster in that you have to relax and trust in your safety, which is surprisingly secure.
We spent a year riding taxis throughout the city and learned, through trial and error, some mandatory survival skills:
1. You're not married to any particular taxi: if you are less than impressed with either the look of the driver or the apparent comfort of the cab, wave him on and catch another. Some cars won't have handles for rolling down the woindows in the back seat (this is to ensure the driver maintains control of the ventilation and is usually a very hot and choking (from the truck exhaust) ride. Most drivers are capable and friendly but some are noticeably irritable - it's hard to tell but if you get that feeling, listen to it.
2. Don't negotiate before the ride: if the driver wants to do this it is so he can determine if your fare is worth his time (whethter or not he is getting a high price from you). If he insists on setting the fare beforehand, just tell him to drive and he will likley get the hint. Settle up once you exit the vehicle and be prepared for a displeased driver. If you start with a fair offer and place it on the seat with a salutaion in Arabic it stands a better chance of being appreciated. If he tries to squeeze more out of you it is ok to concede a couple more pounds and finish the transaction with a "halloss" - enough! The general rule of thumb when we lived in Cairo in 2004-5 was one LE per minute spent in the car, whether you were moving or not. If you are obviously a foreigner, as I was, you will be expected to pay a slight deal more than what is fair - a little Arabic in greeting will take the edge off of this "custom".
3. Where to sit: a man by himself can sit in front or back - it is fine to sit up front as you can give directions more easily. A woman should always sit in back - especially if you are alone. A solitary female will be suspected of immoral intentions if she sits in front. Women: if the driver bothers you at all or stops to pick up another passenger before you have been delivered to your destination, simply get out (don't bother paying as he knows he crossed the line and you are now shaming him.) It is unlikely that you will encounter any problems but it is best to be prepared so you can react quickly.
4. No one will stop: if you are unable to get a taxi to stop for you (if you are going somewhere far from the city center at night they are not eager to take you there and risk returning without another fare) simply flag down a policeman, preferably a tourist policeman, and ask him for help. You will quickly have a car and a fair price without any hassle.
5. Enjoy the ride: it will be a real experience and you are actually very safe. We were in a couple of very slight fender benders but nothing that was of any danger to anyone.
Upon arrival at the airport, if you use trolley, chances are someone will grab it and insist to help you get the taxi, which is normally his or his friend's. You can avoid this by carrying your luggage yourself. We had this experience. Fortunately I asked someone at the money changer on the estimated cost to get to Cairo. It should be around LE50. The taxi driver initially wanted LE80. So we told him that we knew the estimated cost. Depending on where you're staying the trip should take around 30-45 minutes.