Momondo (Tznius disclaimer) has one-way fares from Tel Aviv to Miami on TAP Portugal for just $70.
Flights have a 3 hour connection in Lisbon. The US isn’t accepting foreign nationals who have been to Europe in the past 14 days, but you can transit without entering Europe and still enter the US.
The only non-Shabbos date that this price is valid for is September 21, which means flying the wrong way on Tzom Gedaliah.
The fare is also valid on September 4, 11, 18, and 25, arriving into Miami on Friday night.
Note that TAP Portugal has suspended all flights to Tel Aviv through August 31st and that may be extended.