Longest driving distance between two cities in neighboring states?

[CNGL-Leudimin]

Going into Mexico, which also has states (and even further, it's also the United [Mexican] States ):
- Texline TX to Tampico Tamps.: 1169 miles/1881 km
- Texarkana TX to Buenavista de Atascaderos Chih.: 1176 miles/1892 km
- Smith River CA to Ejido Villa Jesús María B.C.: 1311 miles/2110 km

Too bad Arizona borders Baja, otherwise I could have gone into Sinaloa for even more distance.

[Roadgeekteen]

https://www.google.com/maps/dir/Cranbrook,+BC,+Canada/Fairbanks,+AK/@56.7432329,-139.7145621,5z/data=!3m1!4b1!4m14!4m13!1m5!1m1!1s0x5364df3306a54043:0x92d71ca3daef4a80!2m2!1d-115.7694002!2d49.5129678!1m5!1m1!1s0x5132454f67fd65a9:0xb3d805e009fef73a!2m2!1d-147.7163888!2d64.8377778!3e0

Including provinces, this could be the winner.

[CNGL-Leudimin]

Of course, it still can be improved .

[US 89]

Eastport, ID to Oljato-Monument Valley, UT is a nice long 1149 miles per Google Maps, though that route does spend a considerable amount of time in Montana.

[hbelkins]

Using Google, Hickman, KY to Chincoteague, VA -- 985 miles (routing through either Tennessee or West Virginia to get from Kentucky to Virginia; 984 miles routed through Tennessee and North Carolina.)

On the other end of the state, Woodman, KY to Watson, MO -- 876 miles (routing through Indiana and Illinois).

[1995hoo]

Using Google, Hickman, KY to Chincoteague, VA -- 985 miles (routing through either Tennessee or West Virginia to get from Kentucky to Virginia; 984 miles routed through Tennessee and North Carolina.)

On the other end of the state, Woodman, KY to Watson, MO -- 876 miles (routing through Indiana and Illinois).

Virginia borders Tennessee. Using my iPad, I'm not sure of the total distance because the Google Maps app is crap for multiple stops (won't give total distance), but Memphis to Chincoteague is over 1,000 miles sticking just to the two states.

[sprjus4]

^

Memphis, TN to New Church, VA is just over 1,000 miles.

15 hours via I-40, I-81, I-64, and US-13.

Taking it to Chincoteague is around 1,012 miles.

[Dirt Roads]

Memphis, TN to New Church, VA is just over 1,000 miles.

15 hours via I-40, I-81, I-64, and US-13.

Not quite:  Memphis TN to Hatteras NC is only 998 miles.  It's only 977 going up the coast to Corolla, NC.  I wondered about the ferry ride to Okracoke, but the trip distance is significantly reduced using the Swan Quarter ferry instead of the Hatteras ferry.

[Dirt Roads]

Harpers Ferry WV to Hickman KY is only 814 miles.  But most of that trip is through Virginia and Tennessee.

[bassoon1986]

 Anthony, TX to Venice, LA - 1206 miles


iPhone

[hobsini2]

Using as straight a path as possible, Illinois' farthest points to neighboring states:
(As stated earlier) Superior WI - Cairo 802 mi
Clear Lake IN - Cairo 491 mi
NW of larchwood IA - Cave-in-the-Rock 771 mi
SW of Southwest City MO - Winthrop Harbor 671 mi
S of Argo KY - East Dubuque 717 mi

[TheHighwayMan3561]

Reno, MN to Fortuna, ND - 813 miles
Grand Portage, MN to Edgemont, SD - 950 miles
Noyes, MN to Keokuk, IA - 784 miles

Reno, MN to Lynn Lake, MB - 1,291 miles

[hbelkins]

Using Google, Hickman, KY to Chincoteague, VA -- 985 miles (routing through either Tennessee or West Virginia to get from Kentucky to Virginia; 984 miles routed through Tennessee and North Carolina.)

On the other end of the state, Woodman, KY to Watson, MO -- 876 miles (routing through Indiana and Illinois).

Virginia borders Tennessee. Using my iPad, I'm not sure of the total distance because the Google Maps app is crap for multiple stops (won't give total distance), but Memphis to Chincoteague is over 1,000 miles sticking just to the two states.

I didn't try to force Google Maps to cross directly from Kentucky to Virginia via one of the five logical crossings (US 421, KY/VA 160, US 23, KY/VA 80, or US 460) to see what the distance would be staying in those two states and not going into other states.

[GaryV]

Another one in Canada

Flin Flon MB to Bainsville ON - 3032 km

[jlam]

North Sioux City, South Dakota to Yaak, Montana

1,296 miles
https://tinyurl.com/yjjbyjfu

[Hobart]

So if we play the Canadian cards, there's a 3,400 kilometer route between Curry Hill, Ontario, and Fox Hill, Manitoba.

https://www.google.com/maps/dir/Fox+Mine,+Manitoba,+Canada/Curry+Hill,+ON,+Canada/@60.9168529,-100.4625525,5.03z/data=!4m14!4m13!1m5!1m1!1s0x525a119bcf1211eb:0xd2ba8b71c8264599!2m2!1d-101.649722!2d56.63!1m5!1m1!1s0x4cceabf6c49c74b3:0x1334a655bd7847df!2m2!1d-74.393789!2d45.206157!3e0

[thspfc]

Eastport ID to Laughlin NV - almost 1300 miles