The cheapest flights to Bahrain recently found by momondo users are $66 with KLM, $117 with Kuwait Airways, and $130 with Jazeera Airways.
Bahrain has restricted the entry of all travelers except for nationals, residents, military personnel of Bahrain, and travelers with a valid letter of Prior Permission Granted (PPG), which must be presented prior to boarding. Visas on arrival have been suspended except for diplomats or travelers with UN passports. Anyone attempting to enter Bahrain must have a Bahrain residence permit or secure a visa in advance by visiting www.evisa.gov.bh. All arrivals into Bahrain will be subject to COVID-19 testing at their own expense. These tests may cost more than 30 BHD ($80), and travelers may be required to take two tests, which would double the cost to the passenger. Those without symptoms will be required to self-isolate for 10 days on arrival, while those with symptoms will be subject to further quarantine measures. Starting from July 22, passengers must pay the fees related to the tests and quarantine before their departure at http://bh.bh/BeAware, or via the self-service payment kiosk at the airport. Additionally all arrivals who have visited or transited Iran, Iraq and Lebanon within 14 days prior to their arrival in Bahrain will be subject to enhanced testing procedures and quarantine at Government facilities. Border crossing from Saudi Arabia on the causeway has been suspended, but is now open for Saudi citizens arriving at BAH to travel to Saudi (one-way). If you are planning to travel to Bahrain at this time, it is recommended that you stay up to date on current restrictions and follow proper safety measures while in public.