美国是大家前往南美国家的中转站，所有经过美国转机前往其他国家的旅客，无论是否会离开国际中转区，都需要申请美国的过境签证或者旅游签证。过境签证（C类）的申请过程和普通的B1/B2签证差不多，都是需要填写表格然后预约面谈。
Many countries in South America offer conditional visa-free access to Chinese citizens -- holders of a valid US visa can enter without a visa, so they go directly to the US for a 10-year B1/B2 visa, maybe the most cost-effective way.
南美洲的很多国家对中国公民都是有条件免签——持有有效的美国签证可以免签入境，因此，直接办理美国十年有效的B1/B2签证，也许是性价比最高的方式。
Note: If you travel to a specific country via the United States on a tourist visa, your stay in a specific country will be counted as part of your stay in the United States. Pay attention to overstay cases.
注意：持有旅游签证途经美国前往特定国家，在特定国家逗停留的时间会被算在入境美国的停留时间之内，注意逾期居留的情况。
2. Canada (visa required unless conditions are met)
2、加拿大（必须签证，除非满足条件）
Another popular consulting country for transit visas is Canada. Most of the small partners who transit in Canada are going to the United States. Generally speaking, they need to apply for transit visas, in most cases, a transit visa is required.
另外一个热门的过境签咨询国家就是加拿大了，大多在加拿大转机的小伙伴都是前往美国，一般来说都是需要办理过境签证的，大多数情况下需要办理过境签。
A transit visa is conditional on a stay of no more than 24 hours. A transit visa in Canada is valid for 24 hours. You cannot stay in the city of Toronto for 7 days. If you need to stay in the city of Toronto, you need to apply for a Canadian tourist visa.
办理过境签证的条件是停留不超过24小时，所在加拿大过境签证的停留期是24小时内，您不能在多伦多市区停留7天。如果您需要在多伦多市区停留，您需要申请加拿大旅游签证。
Canada is not exempt from a U.S. visa, but some airlines have signed agreements with the Canadian government: flights to the United States pass through Canada visa-free. Please consult your airline.
有美国签证不会免签加拿大，但部分航空公司跟加拿大政府签了协议：前往美国的航班可以免签过境加拿大，请咨询搭乘的航空公司。
The Chinese Consulate General in Vancouver has verified the regulations with the Canada Border Services Agency (CBSA) and the Immigration and Immigration Canada (CIC) regarding the transit of Chinese citizens to a third country. Here's how:
中国驻温哥华总领事馆已向加拿大边境服务局（Canada border services agency，CBSA）和移民局（citizenship and immigration Canada，CIC）就中国公民过境加拿大赴第三国核实了有关规定。具体如下：
I. Chinese citizens travelling to or from the United States do not need a transit visa to transit through Canada if all the following conditions are met:
一、中国公民前往或离开美国，如需过境加拿大，满足以下所有条件时无须办理加拿大过境签证：
1. hold a valid Chinese passport;
1、持有效中国护照；
2. hold a valid U.S. visa;
2、持有效美国签证；
3. Air Canada, Jazz Aviation LP, Cathay Pacific, China Airlines, Philippine Airlines, Air China, and Air China;
3、搭乘加拿大航空、加拿大爵士乐航空、香港国泰航空、中华航空、菲律宾航空、中国国际航空的班机；
4. Transit from Vancouver international airport (Vancouver, Canada) or Lester b. Pearson international airport (Toronto) (terminal 1 only).
4、从加拿大温哥华国际机场或多伦多皮尔逊国际机场1号航站楼过境；
5. Must depart from Beijing, Hong Kong, Shanghai, Guangzhou, Xiamen, Fuzhou, Chengdu, Shenyang, Harbin, Manila, Taipei in Asia on a direct flight to Canada.
5、必须从亚洲的北京、香港、上海、广州、厦门、福州、成都、沈阳、哈尔滨、马尼拉、台北出发，乘坐直达加拿大的航班。
In addition to meeting the above conditions, Chinese citizens in transit through Canada must hold a confirmed direct connecting flight ticket to the United States leaving Canada on the same day (no stopovers or overnight stays in Canada); During the hours of the U.S. in-transit pre-clearance facility, you Don't get a transit visa. Therefore, passengers should carefully check the flight time.
除满足以上各项条件外，过境加拿大的中国公民须持有确认的、飞往美国的、同日离开加拿大的联程直航机票（不能在加拿大临时滞留或过夜）；在加拿大转机的乘客在美国过境预先清关设备工作时间内抵达，可不办理过境签证。因此，旅客应仔细核对航班时间。
Starting June 1,18, Chinese citizens can travel to the United States via designated airlines without having to apply for a temporary Canadian visa, via the Montréal–Pierre Elliott Trudeau International Airport.
从18年6月1日开始，中国公民搭乘指定航空通过蒙特利尔国际机场中转，前往美国时，可以不用申请临时的加拿大签证了。
Designated Airlines: Air Canada, Air China, WestJet, Cathay Pacific, China Southern, Philippine Airlines, Jazz Air, Sky Regional Airlines Inc., Air Georgia
指定航空公司：加拿大航空、中国国际航空、加拿大西捷航空、香港国泰航空、中国南方航空、菲律宾航空、加拿大爵士乐航空、加拿大快运航空、加拿大格鲁吉亚航空
The following conditions must also be met:
还要满足以下条件：
● Direct Air Canada flight from Shanghai Pudong International Airport or Narita International Airport
● 从上海浦东国际机场或东京成田国际机场始发的加拿大航空直飞航班
● Must hold a confirmed extended ticket for a flight to the United States on the same date as arrival in Montreal
● 必须持有经确认的飞往美国航班的续程机票，机票日期需与抵达蒙特利尔的日期相同
● Connecting from Montréal–Pierre Elliott Trudeau International Airport
● 从蒙特利尔特鲁多国际机场机场转机
● Return directly from the US and transfer to Shanghai Pudong International Airport or Narita International Airport on the same day flight
● 直接从美国返程，且搭乘同日航班中转前往上海浦东国际机场或东京成田国际机场
3. United Kingdom (through the United Kingdom requires a direct transit visa within the airport quarantine zone)
3、英国（途径英国需要办理机场隔离区内直接转机签证）
Chinese citizens travelling through the UK are required to apply for Direct Airside Transit Visa and Visitor in Transit Visa.
中国公民途径英国需要办理机场隔离区内直接转机签证（Direct Airside Transit Visa）和入境转机签证（Visitor in Transit Visa）。
Chinese citizens who wish to transit through the UK to other countries or regions are required to apply for a UK transit visa, according to the UK's official website.
根据英国移民局官方网站相关政策规定：希望经由英国过境前往其他国家或地区的中国公民需要申请英国过境签证。
However, you may be able to cross the UK visa-free if you meet the following conditions.
但是，如果你符合下列免签条件，可能就可以免签经英国过境。
Direct Airside Transit Visa (DATV) exemption materials:
机场隔离区内直接转机签证（Direct Airside Transit Visa）免签材料：
(1) a valid Canadian, New Zealand, Australian or US visa (with which you can transfer to any country)
(1) 有效的加拿大，新西兰，澳大利亚或美国签证（可以凭此转机至任何国家）
(2) A permanent residence permit issued by Australia or New Zealand
(2) 澳大利亚或新西兰签发的永久居住许可
(3) A valid residence permit in a uniform form issued by the European Economic Area Country or Switzerland
(3) 欧洲经济区国家或瑞士签发的统一格式的有效居住许可
(4) Permanent residence permits issued by Canada after 28 June 2002
(4) 加拿大于2002年6月28日之后签发的永久居住许可
(5) A valid, standardized category D visa for entry into a European Economic Area Country or Switzerland
(5) 有效的统一格式的进入某一欧洲经济区国家或瑞士的D类签证
(6) A valid Irish biometric visa
(6) 有效的爱尔兰生物特征签证
(7) A valid Schengen ADS group visa and travel via the UK to the country where the Schengen ADS visa was issued
(7) 有效的申根ADS团队签证，并且经由英国前往该申根ADS签证签发国
(8) An air ticket from the Schengen Area if you can prove that you have visited the Schengen Area within the last 30 days on a valid Schengen ADS visa
(8) 从申根地区出发的飞机票，如果您能证明您曾在过去30天内持有效申根ADS签证前往申根地区
(9) A valid I-551 temporary immigrant visa issued by the United States (the stamped version will not be accepted)
(9) 美国签发的有效的I-551临时移民签证（盖印章的版本将不予接受）
(10) A valid permanent residence card issued by the United States on or after 21 April 1998
(10) 美国1998年4月21日或以后签发的有效永久居住卡
(11) Expired I-551 permanent residence card issued by the United States on or after 21 April 1998, confirmed by letter I-797
(11) 通过I-797信函确认延期的美国1998年4月21日或以后签发的已过期的I-551永久居住卡
(12) Separate US immigration form 155A/155B (attached to a sealed brown envelope)
(12) 单独的美国移民表格155A/155B（附在封口的棕色信封上）
Visa in Transit Visa exemption requirements:
入境转机签证（Visitor in Transit Visa）免签要求：
To be granted visa-free access to the UK, you must:
获得英国入境转机签证免签资格，你必须：
(1) flying in and out of the UK
(1) 乘飞机出入英国
(2) The flight has been confirmed and will leave the country either on the day of arrival or before midnight the following night
(2) 已确认续程航班，并且将在抵英当天或第二天晚上零点以前离境
(3) Possession of a legal document (such as a visa) for the country of destination;
(3) 持有前往目的地国家的合法文件（比如目的国签证）；
And meet any of the following conditions:
并且符合以下任一条件：
(1) Travel directly (or via a reasonable route) to Australia, Canada, New Zealand or the United States and hold a valid visa for that country
(1) 直接（或通过合理路线转程）前往澳大利亚，加拿大，新西兰或美国，并且持有该国有效签证
(2) Travel to the United Kingdom on a valid visa from Australia, Canada, New Zealand or the United States (or via a reasonable connecting route)
(2) 持澳大利亚，加拿大，新西兰或美国有效签证直接（或通过合理路线转程）前往英国
(3) Travel directly (or by a reasonable route) from Australia, Canada, New Zealand or the United States to the United Kingdom, and not more than 6 months after your last entry into Australia, Canada, New Zealand and the United States with a valid visa.
(3) 直接（或通过合理路线转程）从澳大利亚，加拿大，新西兰或美国前往英国，并且距您上次持有效签证入境澳大利亚，加拿大，新西兰和美国不超过6个月。
(4) Have a permanent residence permit issued by Australia or New Zealand
(4) 拥有澳大利亚或新西兰签发的永久居住许可
(5) Holding a valid residence permit in a uniform form issued by the European Economic Area Country or Switzerland
(5) 持有欧洲经济区国家或瑞士签发的统一格式的有效居住许可
(6) Holding a valid permanent residence permit issued by Canada after 28 June 2002
(6) 持有加拿大于2002年6月28日之后签发的有效永久居住许可
(7) A valid, standardized, category D visa for entry into a European Economic Area Country or Switzerland
(7) 有效的统一格式的进入某一欧洲经济区国家或瑞士的D类签证
(8) An Irish biometric visa and an air ticket to the Ireland
(8) 持有爱尔兰生物特征签证以及续程前往爱尔兰共和国的机票
(9) You have travelled from the Ireland to the UK and have not been allowed to enter or arrive in Ireland for more than three months on your last Irish biometric visa
(9) 您从爱尔兰共和国前往英国，并且距您上次持爱尔兰生物特征信息签证获准入境或抵达爱尔兰不超过3个月
(10) Holder of a valid permanent residence card issued by the United States on or after 21 April 1998
(10) 持有美国1998年4月21日或以后签发的有效永久居住卡
(11) Holder of a valid I-551 temporary immigrant visa issued by the United States (the stamped version will not be accepted)
(11) 持有美国签发的有效的I-551临时移民签证（盖印章的版本将不予接受）
(12) Expired I-551 permanent residence card issued by the United States on or after 21 April 1998, confirmed by letter I-797
(12) 通过I-797信函确认延期的美国1998年4月21日或以后签发的已过期的I-551永久居住卡
(13) Hold a separate U.S. Immigration Form 155A/155B (attached to a sealed brown envelope)
(13) 持有单独的美国移民表格155A/155B（附在封口的棕色信封上）
If the above conditions are met, the transit visa may be waived for a 24-hour stay.
满足以上几种情况，就可以免过境签停留24小时。
If you don't have any, just take a look at this
如果你都没有，那就老老实实的看看这个吧
There are roughly two types of UK Transit visas
英国过境签大致分为两种
① Direct Airside Transit visa
If you don't have to go through UK border checks (for example, don't leave the airport and don't need to pick up luggage), you need to apply for Direct Airside Transit visa (DATV). The maximum stay is 24 hours.
如果你不需要经过英国边境检查(例如不离开机场且不需要取行李)，你需要申请Direct Airside Transit visa (DATV)。最长停留时间是24小时。
② Visitor in Transit visa
If you need to leave the airport, or if you don't leave the airport but have to go through UK border control (e.g., don't leave the airport but pick up your luggage), you can apply for a Visitor in Transit visa. This usually has a maximum duration of 48 ho You can also apply for a long-term transit visa if you can prove that you regularly fly through the UK and stay for more than 48 hours.
如果你需要离开机场，或者你不离开机场但要经过UK border control(例如不离开机场但要取行李)，你可以申请Visitor in Transit visa。这个通常最长停留时间是48小时。如果你能证明自己要经常在UK转机并且停留多于48小时，你也可以申请长期过境签!
In short, in most cases, regardless of entry or non-entry is required to apply for a transit visa, but in addition to the first few cases mentioned by the immigration authorities!
总之就是，大部分情况下，无论入不入境都是需要办理过境签的，但是除了开头提到移民局规定那几种情况喔！
4. Australia (transit visa required)
4、澳大利亚（必须办理过境签证）
Whether or not they leave the international transit zone, you will need to apply in advance for a transit visa (category 771) from the Australian Embassy or consulate with a photocopy of your ticket, Passport and a valid visa for your destination (except for visa-free/visa-on-arrival at your destination), the application process is the same as for an ordinary tourist visa, but the transit visa is free.
无论是否离开国际中转区，都需要提前凭机票行程单打印件、护照以及目的地有效签证（目的地开放免签/落地签除外）等向澳大利亚使领馆申请过境签证（771类别），申请流程和普通旅游签证一样，但是过境签证免费。
Although the official website states that you may not need to apply for a transit visa within 8 hours of your connecting flight.
虽然官网有规定，转机8小时内，可能不需要申请过境签。
Note, however, that the official website means within 8 hoof a connecting flight, and can only be removed from the list of countries below. The Chinese mainland is not applicable and must be signed for transit:
但要注意的是，官网的意思是转机8小时内, 同时要在它下面的国家列表内才可以不用. 中国大陆不适用, 必须要过境签：
The following categories of travellers do not need to apply for a visa to transit through Australia if they meet the following conditions:
以下类别的旅行者如果符合以下条件，则无需申请签证即可在澳大利亚境内过境：
Citizens of the following countries:
以下国家的公民：
Andorra, Argentina, Austria, Belgium, Brunei, Bulgaria, Canada, Chile, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Federated States of Micronesia, Fiji, Finland, France, Germany, Greece, Hungary, Iceland, Indonesia, Ireland, Italy, Japan, Kiribati, Latvia, Liechtenstein, Lithuania, Luxembourg, Malaysia, Malta, Marshall Islands, Mexico, Monaco, Nauru, Netherlands, New Zealand, Norway, Oman, Palau, Papua New Guinea, Philippines, Poland, Portugal, Qatar, Romania, Samoa, San Marino, Singapore, Slovakia, Slovenia, Solomon Islands, South Africa, South Korea, Spain, Sweden, Switzerland, Thailand, Tonga, Tuvalu, United Arab Emirates, Britain (including its colonies) , the United States of , Uruguay, Vanuatu and the Vatican.
安道尔，阿根廷，奥地利，比利时，文莱，保加利亚，加拿大，智利，克罗地亚，塞浦路斯，捷克共和国，丹麦，爱沙尼亚，密克罗尼西亚联邦，斐济，芬兰，法国，德国，希腊，匈牙利，冰岛，印度尼西亚，爱尔兰，意大利，日本，基里巴斯，拉脱维亚，列支敦士登，立陶宛，卢森堡，马来西亚，马耳他，马绍尔群岛，墨西哥，摩纳哥，瑙鲁，荷兰，新西兰，挪威，阿曼，帕劳，巴布亚新几内亚，菲律宾，波兰，葡萄牙，卡塔尔，罗马尼亚，萨摩亚，圣马力诺，新加坡，斯洛伐克，斯洛文尼亚，所罗门群岛，南非，韩国，西班牙，瑞典，瑞士，泰国，汤加，图瓦卢，阿拉伯联合酋长国，英国（包括其殖民地） ），美利坚合众国，乌拉圭，瓦努阿图和梵蒂冈。
Hong Kong residents who hold a Hong Kong Special Administrative Region (HKSAR) passport or a British Overseas (BNO) passport.
持有香港特别行政区（香港特区）护照或英国海外（BNO）护照的香港居民。
A resident of Taiwan holds a passport issued by the Taiwan authorities (except for passports, which are said to be official or diplomatic passports).
台湾居民持有台湾当局签发的护照（护照除外，据称是官方或外交护照）。
Holder of an official Indian passport.
印度官方护照持有人。
5. Russia (airport transit visa-free, train to transit visa)
5、俄罗斯（机场过境免签，火车要过境签）
According to the relevant Russian regulations, foreign citizens with a valid international travel document and a confirmed date and seat on a joint ticket to a third country, transferring within the same airport (except from an international flight to a domestic flight) and staying no more than 24 hours are exempt from visa requirements, and the scope of activity is limited to the airport transit zone.
根据俄罗斯相关规定，外国公民持本人有效国际旅行证件和已确定日期及座位的前往第三国的联程机票，在同一机场内转机（由国际航班转国内航班除外），且停留不超过24小时可免办签证，活动范围仅限于机场过境区。
A valid entry or transit visa is required for transiting flights between different airports or cities in the same city in Russia. There is no such thing as an airport landing visa in Russia.
如需在俄境内同一城市不同机场或不同城市间转航班，均需持有有效入境或过境签证。俄罗斯不存在机场办理落地签的做法。
That is, there is a question to be clarified in advance about whether the airport of transit is the same as the airport of landing or not, and if it is different, it is still necessary to apply for a transit visa! There are three international airports in Moscow! They are Sheremetyevo International Airport (SVO), Domodedovo International Airport (DME) and Vnukovo International Airport (VKO).
就是说，有一个问题要事先弄清楚，关于转机的机场到底和落地机场是不是同一个的问题，如果不同，依然是需要办理过境签的！莫斯科一共三个国际机场！分别为：谢列梅捷沃国际机场（SVO）、多莫杰多沃国际机场（DME）和伏努科沃国际机场（VKO）。
China International Airlines (CA), China Southern Airlines (CZ), China Eastern airline (MU), Hainan Airlines (HU) flights and Ran Airlines (SU) flights to and from Sheremetyevo airport are concentrated. Ran Intercontinental Airlines (UN) flies between China and Russia in the Vnukovo International Airport.
中国国际航空公司（CA）、中国南方航空公司（CZ）、中国东方航空公司（MU）、海南航空公司(HU)航班以及俄罗斯航空公司(SU)往返中俄航班均集中在谢列梅捷沃机场。俄罗斯洲际航空公司（UN）往返中俄航班在伏努科沃机场。
In addition, neither Ural Airlines (U6) nor Siberian Airlines (S7) have direct flights from Moscow to China.
此外，乌拉尔航空公司（U6）和西伯利亚航空公司（S7）均无从莫斯科直飞中国航班。
Note: Travellers travelling through Russia to Belarus or Kazakhstan must apply for a transit or entry visa regardless of the length of their stay. In addition, by train transit through Russia, also have to do transit sign.
注意：经俄罗斯前往白俄罗斯或者哈萨克斯坦的旅行者无论停留时间多长，都必须申请过境或者入境签证。另外，乘火车过境俄罗斯，也得办过境签。
7. Mexico (you don't need a transit visa if you don't leave the airport)
7、墨西哥（转机不出机场不需要过境签）
Mexico is an important transit point for the rest of South, where foreign tourists transiting through international airports in Mexico to a third country do not leave the airport for connecting flights, a transit visa is not required if the stay is less than 24 hours.
墨西哥是中转南美其他地方的一个重要中转地，在墨西哥境内各国际机场过境赴第三国的外国游客，如果是联程票转机不出机场，且停留时间在24小时之内的话，不需要办理过境签证。
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