Travel east on S Airport Rd. Continue straight to stay on S Airport Rd. Keep left at the fork and continue onto S Mid Continent Rd. Take a slight right to stay on S Mid Continent Rd. Travel 1.1 miles and turn right onto W Kellogg Dr. Take the ramp on the left onto US-54 E and travel 1.0 miles. Take the exit onto I-235 S and travel 6.8 miles. Keep right at the fork, follow signs for I-135 S/I-35 and merge onto I-135 S (Partial toll road). Travel 1.0 mile and keep right at the fork. Follow signs for I-35 S/Oklahoma City/Kansas Turnpike and merge onto I-35 S/Kansas Turnpike (Toll road). Travel 38.0 miles and take exit 4 toward US-166 W/E 160th St S (Toll road). Keep right at the fork, follow signs for US-166 W and merge onto US-166 W/E 160th St S (Partial toll road). Travel 3.4 miles and turn left onto US-81 S/Main St. Travel 0.5 miles and turn right onto US-81 S/Stuart St. Continue to follow US-81 S for 11.7 miles. Turn left onto US-81 S/S Main St. Continue to follow US-81 S (entering Oklahoma) for 32.3 miles.