回复: 我有美国的多次往返的签证，到美国想顺路去加拿大能否过境签呢？
找到了，可官方的没有写作中国的航空公司的飞机可以免签。不如免费签个过境签证来的放心。
http://www.cic.gc.ca/english/resources/manuals/bulletins/2009/ob142.asp
Operational Bulletin 142
July 30, 2009
Transit Without Visa Program
Program overview
Citizenship and Immigration Canada (CIC), in cooperation with the Canada Border Services Agency (CBSA), has announced the formalization of the Transit Without Visa (TWOV) pilot at Vancouver International Airport into a national program. The TWOV Program, like the pilot, will allow certain foreign nationals with valid United States visas, travelling to and from the United States, to transit Canada without a Canadian visa.
The objective of the TWOV Program is to facilitate the movement of bona fide travellers transiting Canada while maintaining the security of Canadians and the integrity of Canada’s immigration and refugee protection programs. The program will also improve the international competitiveness of Canadian airports by making them more attractive to airlines and travellers originating from or destined to the United States.
Eligible foreign nationals
The TWOV Program applies only to nationals of the following four countries:
Indonesia
The Philippines
Taiwan
Thailand
China* (on a trial basis as described below)
In order to be eligible to travel under the TWOV Program, nationals of these countries must:
be in possession of a valid United States visa;
be in possession of a valid passport issued by the authorities of a participating country;
hold a confirmed onward ticket for a connecting flight that departs Canada immediately (foreign nationals transiting Canada under the TWOV Program may not seek entry to Canada as a temporary resident);
be arriving in Canada on an airline that has an up-to-date TWOV Memorandum of Understanding (MOU) with CIC and the CBSA; and
be transiting through an approved Canadian airport.
Eligible airlines
The following airlines have an up-to-date TWOV MOU with CIC and the CBSA, and are therefore eligible to carry TWOV passengers:
Cathay Pacific Airways
China Airlines
Philippine Airlines
Eligible airports
Currently, only the Vancouver International Airport has United States intransit preclearance facilities and an up-to-date TWOV MOU with CIC and the CBSA. As such, it is presently the only Canadian airport that is eligible to receive TWOV flights.
TWOV Program expansion
Additional foreign nationals, airlines and airports may be approved by CIC and the CBSA to participate in the Program in the future. Missions will be notified when changes are made to the list of approved program participants.
China transit trial
CIC, in cooperation with the CBSA, is also introducing a limited one-year China Transit Trial at the Vancouver International Airport as of July 30, 2009. Similar to the TWOV Program, the China Transit Trial will allow Chinese nationals with valid United States visas travelling to and from the United States, to transit the Vancouver International Airport without a Canadian visa.
This one year trial is limited to the airlines currently participating in the TWOV Program and the Vancouver International Airport. In addition, Chinese nationals participating in the TWOV Program must have as their last embarkation point one of the following six cities:
Beijing;
Hong Kong;
Shanghai;
Guangzhou;
Manila; or
Taipei.
是在美国事先办好签证还是到加拿大落地签？