NOTICE TO PASSENGERS: SECURITY MEASURES FOR AIRPORTS AND AIR TRAVEL
Although the rules concerning liquids, gels and aerosols at pre-boarding checkpoints remain in effect until further notice, Transport Canada has approved a contingency plan for the sale of duty-free products at Montréal-Trudeau. Beginning August 19, passengers on international flights (except for those flying to the United Kingdom) will have access to the usual services at the duty-free shop in the international sector. Because all flights to the United Kingdom will be assigned to domestic boarding gates, passengers will not have access to the duty-free shop.  For travellers heading to the United States, because the duty-free shop is located before the pre-boarding checkpoint, all products purchased must be placed in checked luggage.
REMINDER - Additional security measures previously announced by Transport Canada. All passengers should be aware that liquids, gels or aerosols will not be permitted in carry-on luggage on all flights departing from Canadian airports. Liquids or gels in containers of any size include (but are not limited to): beverages, shampoo, suntan lotion, creams, toothpaste, hair gel, and other items of similar consistency. Aerosols include (but are not limited to): insect repellent, hairsprays and deodorant. Passengers should pack liquids, gels or aerosols in checked baggage.  Exceptions include the following : Baby formula, breast milk and baby food in small containers if traveling with a small child of two years of age or under; Prescription medicine with a name that matches the passenger's ticket/boarding pass; Essential non-prescription medication (not to exceed 120ml / 4oz per container and for diabetic passengers, liquids/gels not to exceed 240ml - 8oz per container).

Lighters : Passengers should also be aware that lighters will not be permitted in carry-on or checked baggage on all flights departing from Canadian airports. It is also important to note that outside restrictions of lighters, liquids, gels and aerosols, all other permitted and prohibited items in carry-on and checked baggage remain the same. Portable computers and other electronic devices such as CD players, digital cameras and cellular phones ARE PERMITTED in carry-on baggage. Passengers boarding flights to the United States may also be requested to remove footwear for additional screening. Aéroports de Montréal advises all air travellers to keep these measures in mind when preparing for a flight. And advises passengers to pack all non-essential items in their checked baggage and arrive at the airport well in advance of their flight. Passengers should contact their carrier regarding any possible delays or should they have any questions regarding the status of their flights. 
As there may be additional changes, we invite you to visit the  Transport Canada  website.  
For more information regarding permitted and prohibited items, please consult Canadian Air Transport Security Authority ( CATSA ) Website.

United

Montréal-Pierre Elliott Trudeau International Airport ( IATA : YUL ,  ICAO : CYUL ) ( French : Aéroport international Pierre-Elliott-Trudeau de Montréal ) or Montréal-Trudeau for short, is an international airport serving Montreal , Canada . It is the busiest airport in the province of Quebec and the third busiest airport in Canada by passenger traffic (after Torono Pearson and Vancouver ) serving 10.9 million passengers in 2005. Currently the airport is completing a C$700 million expansion plan that will double the capacity of the terminal. Montreal-Trudeau is one of the only airports in the world that is prepared to handle the new Airbus A380 , which is expected to begin service in early 2007. Air France will be putting it in service on its daily Paris-Montreal route. Montreal-Trudeau will be the only airport in Canada with a daily A380 flight. Montréal-Trudeau was formerly known as Montréal-Dorval International Airport . It is located in the city of Dorval . The airport was renamed by the federal government in honour of former Canadian Prime Minister , the late Right Honourable Pierre Elliott Trudeau , on January 1 , 2004 , the renaming having been announced in September the previous year. This move provoked opposition from some Quebeckers, especially Quebec sovereigntists opposed to some of the policies of the former Prime Minister, as well as less vocal opposition from many aviation historians and enthusiasts who note Trudeau's historical role as an opponent of the airport. Trudeau was heavily involved in the construction of Mirabel International Airport , originally planned to replace Montréal-Dorval airport. Dorval played an important role in the development of trans-Atlantic aviation. It was primarily chosen as an airport because of good weather and few foggy days. During WWII it was the major transit point for departures to Europe. Thousands of Allied aircraft passed through Dorval on the way to England. Women - the WAC's (Women's Air Corps) - played a major role in transiting aircraft to the war theatres by way of Dorval. At one time Dorval was the major transatlantic hub for commercial aviation and the busiest airport in Canada with airlines such as British Overseas Airways Corporation (B.O.A.C) landing at Dorval en route to New York. Montreal's economic decline in the late 1970's and 1980's had a significant effect on the airport's traffic, as international flights shifted away from Dorval to Toronto Pearson in more prosperous Toronto . Ironically, the Trudeau government had recently developed Mirabel Airport north of Montreal to handle an expected growth in international traffic, and, eventually, to replace Dorval. That extra traffic never materialized, and due to its closer proximity to downtown Montreal, all scheduled air services has now returned to Dorval/Trudeau, while Mirabel has nearly ceased operation. With Montreal's economic recovery during the late 1990s, traffic at the airport may once again pick up. Mirabel is home to the world's second largest airport in terms of land area. It is larger than America's two largest cities, New York and Los Angeles. In 2005, North America signed an aviation deal that stated the "free skies" act is now possible. This means that an Air Canada flight flying from Montreal to Dallas can land, pick up more passengers and continue to a third destination like Rio de Janeiro, for example. This act will begin to take place in either 2006 or 2007 and when it does become available, Trudeau airport will definitely see an increase in the number of destinations served worldwide. On September 11, 2001 , Dorval was part of Operation Yellow Ribbon as it took in 10 of the diverted flights that were bound for the United States. Pilots were asked to avoid Dorval by both Transort Canada and NAV CANADA as a security measure because it is one of the busiest airports in Central Canada. The airport was Montréal-Dorval International Airport when 9/11 happened. Pierre Elliott-Trudeau International airport is the main hub for both Air Canada and Air Transat. It's also used as a southern base of operations for First Air, which bases its maintenance at Ottawa/Carp Airport . Montreal-Trudeau is the world's second busiest airport of a French-speaking city after Charles-de-Gaulle International in Paris . During the summer, Montreal-Trudeau has 8 flights to Paris a day, 6 flights to London a day and 4 flights to Frankfurt . At one point, it was the busiest airport in Canada and the third busiest in North America after Chicago's O'Hare airport and New York's JFK. Today, it ranks 31st in terms of passenger traffic in North America. Montreal-Trudeau is the only airport in Canada with 2 airport control towers. Montreal-Trudeau serves more international destinations than any other Canadian airport. On December 13, 2005, Trudeau airport was featured on the reality TV series The Amazing Race . Teams arrived at the airport from Toronto on Air Canada and Minneapolis on Northwest Airlines , before heading to tourist attractions downtown.

International Terminal Trudeau Airport serves 113 destinations worldwide, making it one of the most connected airports in Canada and North America. (Some airlines such as Corsair (Paris/Orly) and Lufthansa (Frankfurt and Munich) offer only seasonal flights to YUL during the summer.)