Round-trip flights to Connecticut can be expensive depending on the month, day, and time you travel. The cost of flights to Connecticut also depends on the airline and class of ticket you choose. The average round-trip flight between California and Connecticut costs $900 per person. For example, in May 2019 a one-way flight from Los Angeles to Hartford CT had an average price of $230 while a one-way flight from San Francisco CA had an average price of $320 for that same month.