Kansas US 270 begins in the southeast part of
Liberal, Kansas, at an intersection with
US 83 (running north–south through the intersection) and
US 54. US 270 follows the south leg of this intersection, following US 83 south. US 270 only spends in Kansas before crossing into Oklahoma.
Seward County is the only Kansas county that US-270 serves.
Oklahoma US 270 enters Oklahoma in
Beaver County, the eastern third of the
Oklahoma Panhandle. From here it continues east along
US 64, then south towards
Beaver, the county seat, along
SH-23. South of Beaver, the road joins with
US 412 (OK) and
SH-3, the latter of which US 270 will overlap with through most of northwest Oklahoma. After leaving the Panhandle and picking up
US 183 near
Fort Supply, the highways turn southwest towards
Woodward. US 412 splits away in Woodward. US 270, concurrent with US 183 and SH-3, proceed southeast toward
Seiling. West of Seiling, US 183 splits off to the south, but in Seiling, it is replaced by US 281. The routes continue southwest to
Watonga, where US 270/281 turn south along
SH-8, while SH-3 continues due east to concur with
SH-33. In
Geary, US 270 splits off on an independent alignment, looping through
Calumet before joining with
Interstate 40. US 270 remains concurrent with I-40 from Exit 115 through Exit 181, a distance of . US 270, attached to I-40, runs through the core of the Oklahoma City Metro area, passing through the western suburbs of
El Reno and
Yukon into Oklahoma City proper. The partnership runs just south of
Downtown and the
Bricktown entertainment district on the
Crosstown Expressway. Major interchanges with
I-44 and
I-35 (the latter involving a concurrency with the interstate and its accompanying US Highway, US 62) are found in the city. I-40/US 270 also serve two eastern suburbs of Oklahoma City,
Del City and
Midwest City and form the northern boundary between Midwest City's civilian areas and
Tinker Air Force Base. US-270 finally exits from I-40 on the west side of
Shawnee. US 270 serves most of the towns anchoring the area east of Oklahoma City, including Shawnee,
Tecumseh,
Seminole,
Wewoka, and
Holdenville. It continues southeast to the city of
McAlester, a major southeastern Oklahoma city. It also serves many of the small towns east of McAlester, such as
Krebs,
Alderson,
Bache,
Haileyville, and
Hartshorne. After passing through Hartshorne, the roads curves to the northeast before turning onto a due east course taking it through
Wilburton,
Red Oak, and
Wister. In Wister, it turns south, running across
Wister Lake's dam, and proceeding southeast to
Heavener. There, it meets
US 59, which it will follow for the rest of its time in Oklahoma. The town highways head south from Heavener, passing through the
Wister Wildlife Management Area before entering the
Ouachita National Forest. The route serves as the northern terminus of
US 259 near
Page. The road then squeezes into a valley between Black Fork Mountain and Rich Mountain. In this valley, it crosses the state line into Arkansas.
Arkansas . US 270 enters Arkansas with
US 59, and runs east to
Acorn, where it meets
US 71. The route then travels 15 miles north on US 71 to
Y City where it splits off and continues east. The route then meets
AR 88 in
Pencil Bluff and
AR 27 in
Mt. Ida before heading to
Hot Springs. Entering the city, US 270 meets
US 70 southwest of town and runs
concurrent with it around Hot Springs using the Dr. Martin Luther King Jr. Expressway before leaving the freeway and running along Malvern Avenue southeast of the city. US 270 intersects with
I-30 just outside Malvern, running a short distance northeast on the freeway before interchanging with the George Hopkins Loop bypass and running south around the city. After meeting with
US 67 east of town, the alignment then turns east-southeast meeting
AR 229 in
Poyen and
AR 190/
AR 291 in
Prattsville before crossing paths with
US 167 in
Sheridan. The route trails east towards
Pine Bluff terminating at and interchanging with
I-530/
US 65 in
White Hall. Directly east of this interchange, the highway used to continue along Sheridan Road before terminating at
AR 365/Dollarway Road in northwest Pine Bluff. This former section of the route is now signed
AR 365 Spur. ==History==