Internet bookings were priced cheaper than booking over the phone, to reflect the reduced call centre costs and the aircraft were repainted with the web address. Within a year over 50% of bookings were made using the web site; by April 2004 the figure had jumped to 98%. Now, flights can only be booked over the Internet except during the 3 months immediately before the flight when telephone booking is also available.

EasyJet's aircraft cabins are configured in a single class, high density layout.

The airline's main fleet, comprising the Boeing 737-700, Airbus A319 and Airbus A320-200, carry 149, 156 and up to 180 passengers respectively, depending on layout. A typical Airbus A319 carries approximately 140 passengers in a single class configuration, but as EasyJet do not serve meals on their shorter flights, the airline opted for smaller galleys and had a lavatory installed in unused space at the rear of the aircraft. The space saved by having smaller galleys allowed for the installation of 156 seats. Due to this seating arrangement, EasyJet's Airbus A319 aircraft have two pairs of overwing exits, instead of the standard one pair configuration found on most Airbus A319 aircraft, to satisfy safety requirements.

EasyJet does not provide complimentary meals or beverages on board its flights (apart for some occasional charter flights operated by the airline). Passengers may purchase items on board from the "EasyJet Bistro" buy on board programme. Products include sandwiches, toasted sandwiches, hot meals, chocolate, snacks, hot drinks, soft drinks and alcoholic drinks. Onboard sales are an important part of the airline's ancillary revenue. EasyJet also sells gifts such as fragrances, cosmetics and EasyJet branded items onboard, as well as tickets for airport transfer services or train tickets.

easyJet provides In-Flight Entertainment (IFE) on-board certain aircraft, with the ability to rent a PSP Device, which comes with 4 movies, games and TV shows pre-loaded, and available in different languages. This replaces the standard IFE that Airbus have, with the drop down screens. easyJet will still use the screens, however only to show the Airshow map, the route the aircraft is taking, and how long until arrival. easyJet also has headsets available to purchase, along with a travel pillow and eyeshades, subject to stock. EasyJet provides an in-flight magazine, published monthly, containing articles of interest to its customers and destination guides. As of May 2010, easyJet has been selling copies of Hello Magazine, Top Gear Magazine, and The Mail on Sunday, all at cover price. The Daily mail is also available onboard, at a reduced price of £0.50. Subject to stock.

On 14 December 2004, EasyJet and Hotelopia, a subsidiary of First Choice Holidays, launched the co-branded EasyJetHotels accommodation booking service. EasyJetHotels offers accommodation products throughout the EasyJet network. Customers booking flights through the EasyJet website are provided with quotes for a number of hotels at their destination. Alternatively, customers can book accommodation separately at the EasyJetHotels website.

On 28 June 2007, EasyJet announced it would expand its relationship with Hotelopia by launching EasyJetHolidays, which offers Travel Trust Association protected package holidays made up of EasyJet flights and Hotelopia accommodation products.

EasyJet has also come under criticism in Germany for not observing European Union law on compensation (and assistance to passengers) in cases of denied boarding, delays or cancellations (Regulation 261/2004). In the case of cancellation, passengers should be reimbursed within one week. In 2006, EasyJet did not always refund tickets in a timely fashion. Passengers occasionally had to wait longer for reimbursement of their expenses.

EasyJet is a major supporter of the plans to replace the air passenger duty (APD) tax in the UK with a new tax that varies depending on distance travelled and aircraft type.