Exit 4B marks I-244's entry into the Inner Dispersal Loop (IDL), a ring of freeways encircling downtown Tulsa. At exit 4B, the southwest corner of the loop, US-75 splits away from I-244, joining I-444, which begins at this interchange and proceeds along the south and east edges of the loop. US-64 and SH-51 westbound join I-244 at this interchange, continuing along the west side of the loop with the interstate. Two partial interchanges, exits 4C and 5A, provide access to downtown Tulsa streets. I-244 then reaches the northwest corner of the IDL. At this point lies an interchange with two other freeways. US-64 and SH-51 split away from I-444 here to join westbound US-412, forming the Keystone Expressway. The L.L. Tisdale Parkway continues north from here. I-244 turns east from here, following the north leg of the IDL, joined by US-412 eastbound, which will overlap I-244 for the remainder of the highway. Three more exits to downtown streets are along this leg of the loop. At the northeast corner of the loop, I-244 junctions with I-444, which ends at this interchange, and US-75, which continues north toward Bartlesville. I-244 and US-412 exit the loop on an easterly course.