SUBJECT TO COMPLETION, DATED JULY 13, 2015 PROSPECTUS SUPPLEMENT (To Prospectus dated December 23, 2014) ti cr, CO 0. Units Dynagas LNG Partners LP % Series A Cumulative Redeemable Preferred Units (Liquidation Preference $25.00 per Unit) We are offering of our % Series A C lathe Redeemable Preferred Units, liquidation preference $25.00 eO per ' , or the Series A Preferred Units. '6' -6 Distributions on the Series A Preferred Units are en ttttt lative from the date of original issue and will be payable quarterly in arrears on the 12th day of February, May, August and November of each year, when, as and if declared = E by our Board of Directors. The initial distribution on the Series A Preferred Units offered hereby will be payable on = - co November 12. 2015 in an amount equal to $ per ' . Distributions will be payable out of amounts legally available therefor at an initial rate equal to % per annum of the stated liquidation preference. • c a) 0. T. At any time on or after August 12, 2020, the Series A Preferred Units may be redeemed. in whole or in part, out of 0 0 amounts legally available therefor, at a redemption price of $25.00 per unit plus an amount equal to all 1.7) T. • accumulated and unpaid distributions thereon to the date of redemption, whether or not declared. 0) •- We intend to apply to have the Series A Preferred Units listed on the New York Stock Exchange, or the NYSE, under co = the symbol "DLNGPRA." If the application is approved, we expect trading of the Series A Preferred Units on the NYSE to begin within 30 days after their original issue date. Currently, there is no public market for the Series A Preferred Units. CU 3 Investing in our Series A Preferred Units involves a high degree of risk Our Series A Preferred A E Units have not been rated and are subject to the risks associated with nitrated securities. Please .4O read "Risk Factors" beginning on page 5.15 of this prospectus supplement and