While there are more than just a few landmarks in Montenegro, most momondo users find Kotor Old Town Walls, Mala Plaza, Becici Beach, and Velika Plaza to be the most interesting places to see in the country.
The closest airport to Kotor Old Town Walls is Tivat Airport, which is located in Kotor. If you plan on visiting or staying in this area, landing at Tivat Airport will be your best bet.
The cheapest flights to Montenegro recently found by momondo users are $24 with Ryanair, $49 with Wizz Air, and $52 with Air Serbia.
Montenegro has limited entry to nationals and residents of Montenegro as well as travelers who have only been in a select group of countries meeting certain epidemiological criteria for at least 15 days before travel. People who have spent the last 15 days in one of the following countries (the "Green List") are permitted to enter Montenegro without a requirement for testing prior to entry or quarantine on entry: The United Kingdom, EU Member States (Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Ireland, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain and Sweden) and Algeria, Andorra, Azerbaijan, Barbados, Belarus, Brunei, Cambodia, Canada, China, Cuba, Fiji, Georgia, Iceland, Indonesia, Jamaica, Japan, Jordan, Liechtenstein, Madagascar, Malaysia, Mauritius, Mongolia, Morocco, Mozambique, New Zealand, Nicaragua, Norway, Papua New Guinea, Paraguay, Philippines, Russia, Senegal, South Korea, Switzerland, Tajikistan, Thailand, Trinidad and Tobago, Tunisia, Turkey, United Arab Emirates, Ukraine, Uruguay, Uzbekistan, Vietnam, Zambia and Zimbabwe. People who have spent the last 15 days in one of the following countries (the "Yellow List") over the age of 5 are only permitted to enter Montenegro if they present a negative PCR, ELISA or ECLIA test for SARS-CoV-2 performed by accredited laboratories within 72 hours before arrival: Albania, Australia, Bosnia and Herzegovina, Israel, Kosovo, Lebanon, North Macedonia, Serbia, Seychelles, Singapore and the USA. Residents and nationals of Montenegro may return home from countries not on the aforementioned lists, but should expect to be subject to a self-isolation period of at least 14 days. These lists are valid as of August 15, and are subject to change. Exceptions to the above regulations exist for travelers who are health workers, goods transporters, diplomats, staff of international organizations, military personnel and humanitarian aid workers in performing their functions, and people in need of international protection. Additionally, non-commercial air transport of up to 10 seats may enter Montenegro without restrictions. All travelers on such flights must have a negative PCR, ELISA or ECLIA test for SARS-CoV-2 taken issued within the last 72 hours. Residents of Bosnia and Herzegovina, Kosovo, and Albania may transit through Montenegro without obligation of having a PCR or ELISA test for COVID-19, as long as they are not staying in Montenegro. If you are planning to travel to Montenegro at this time, it is recommended that you stay up to date on current restrictions and follow proper safety measures while in public.