The Best Unleaded Gas Prices from Great Falls, MT to Idaho Falls, ID

Best Exit

Average Price

Highest

Entire Trip

Avg: $3.63

High: $4.10

Costco Gasoline

Exit 194 Helena, MT

$3.399

$3.63

$4.099

Montana

Avg: $3.59

High: $4.00

Costco Gasoline

Exit 194 Helena, MT

$3.399

$3.59

$3.999

Idaho

Avg: $3.93

High: $4.54

Walmart

Exit 118 Idaho Falls, ID

$3.759

$3.93

$4.539

Show Breakdown By State

Only searching fuel stations along supported Interstates, which make up 98.7% (354.4 of 359.1 miles) of this trip.

Order by: Ranking
15 I-15 Southbound
EXIT 278 I 15 Business;US 89;MT 3;MT 200 Great Falls, Montana No gas stations detected here
EXIT 277 International Airport Great Falls, Montana 6th Best Exit Conoco Left (S) - 0.24 miles 3100 Tri Hill Rd, Great Falls, MT 59404 $3.539 3 prices within 1 mile - Avg: $3.58
EXIT 270 MT-330; Ulm Great Falls, Montana 6th Best Exit Cenex Left (S) - 0.14 miles 2 Millegan Rd, Ulm, MT 59485 $3.539 1 prices within 1 mile - Avg: $3.54
EXIT 256 MT-68; Cascade Cascade, Montana 13th Best Exit Sinclair Left (S) - 0.35 miles 130 1st St N, Cascade, MT 59421 $3.649 1 prices within 1 mile - Avg: $3.65
EXIT 254 Cascade Cascade, Montana No gas stations detected here
EXIT 247 Hardy Cr Cascade, Montana No gas stations detected here
SCENIC AREA Scenic Area Cascade, Montana No gas stations detected here
EXIT 244 Canyon Access Cascade, Montana No gas stations detected here
EXIT 240 Dearborn Cascade, Montana No gas stations detected here
REST AREA Dearborn Rest Area Wolf Creek, Montana No gas stations detected here
EXIT 234 Craig Wolf Creek, Montana No gas stations detected here
EXIT 228 U.S. 287 N; Augusta; Choteau Wolf Creek, Montana No gas stations detected here
EXIT 226 Wolf Creek; State Hwy 434 Wolf Creek, Montana 17th Best Exit Exxon Left (S) - 0.25 miles 175 Recreation Rd, Wolf Creek, MT 59648 $3.899 1 prices within 1 mile - Avg: $3.90
PARKING AREA Parking Area Wolf Creek, Montana No gas stations detected here
EXIT 209 Gates of the Mountains Road Helena, Montana No gas stations detected here
WEIGH STATION Weigh Station Helena, Montana No gas stations detected here
EXIT 200 County Rd 453; Lincoln Rd; County Rd 229 Helena, Montana 5th Best Exit Sinclair Right (W) - 0.35 miles 7507 N Montana Ave, Helena, MT 59602 $3.429 1 prices within 1 mile - Avg: $3.43
EXIT 194 Custer Avenue Helena, Montana 1st Best Exit Costco Gasoline Left (E) - 0.73 miles 2195 E Custer Ave, Helena, MT 59602-1217 $3.399 6 prices within 1 mile - Avg: $3.42
EXIT 193 Interstate 15 Business; Cedar St Helena, Montana 2nd Best Exit Conoco Right (W) - 0.55 miles 2401 N Montana Ave, Helena, MT $3.419 3 prices within 1 mile - Avg: $3.54
EXIT 192 US 12; US 287 S; Townsend; Capitol Area Helena, Montana 2nd Best Exit Exxon Right (W) - 0.87 miles 1240 Prospect Ave, 11218 $3.419 4 prices within 1 mile - Avg: $3.44
EXIT 190 S Helena Helena, Montana 2nd Best Exit Maverik Right (W) - 0.07 miles 3196 Colonial Drive, Helena, MT 59601 $3.419 1 prices within 1 mile - Avg: $3.42
EXIT 187 MT-518; Montana City Clancy, Montana 10th Best Exit Conoco Right (W) - 0.12 miles 1 Jackson Creek Rd, Clancy, MT 59634 $3.599 1 prices within 1 mile - Avg: $3.60
EXIT 182 Clancy Clancy, Montana No gas stations detected here
REST AREA Jefferson City Rest Area Clancy, Montana No gas stations detected here
EXIT 176 Jefferson City Clancy, Montana No gas stations detected here
EXIT 164 MT-69; Boulder Clancy, Montana No gas stations detected here
EXIT 160 High Ore Rd Clancy, Montana No gas stations detected here
EXIT 156 Basin Boulder, Montana No gas stations detected here
EXIT 151 Bernice Boulder, Montana No gas stations detected here
EXIT 138 Elk Park Butte, Montana No gas stations detected here
EXIT 134 Woodville Butte, Montana No gas stations detected here
TURN OUT Truck Turnout Butte, Montana No gas stations detected here
EXIT 129 I 90 Butte, Montana No gas stations detected here
EXIT 127 I-15; I-90; Harrison Ave Butte, Montana 10th Best Exit Conoco Right (N) - 0.07 miles 2610 Harrison Ave, Butte, MT 59701 $3.599 5 prices within 1 mile - Avg: $3.60
EXIT 126 Montana Street Butte, Montana 10th Best Exit Conoco Left (S) - 0.06 miles 1900 S Montana St, Butte, MT 59701 $3.599 4 prices within 1 mile - Avg: $3.60
EXIT 122 Rocker Butte, Montana 8th Best Exit Exxon Right (NE) - 0.06 miles 122000 E. Browns Gulch Road, Butte, MT 59701 $3.579 2 prices within 1 mile - Avg: $3.58
EXIT 121 I 15 Butte, Montana No gas stations detected here
EXIT 116 Buxton Road Butte, Montana No gas stations detected here
EXIT 111 Divide Creek Rd Divide, Montana No gas stations detected here
REST AREA Rest Area Divide, Montana No gas stations detected here
EXIT 102 MT-43; Divide Wisdom Divide, Montana No gas stations detected here
EXIT 99 Moose Cr Rd Divide, Montana No gas stations detected here
EXIT 93 Melrose Twin Bridges, Montana No gas stations detected here
EXIT 85 Beaverhead Country; Big Hole River Dillon, Montana No gas stations detected here
EXIT 63 I-15 BUS; MT-41; Dillon; Twin Bridges Dillon, Montana 9th Best Exit Exxon Left (E) - 0.33 miles 633 N Montana St, Dillon, MT 59725 $3.589 5 prices within 1 mile - Avg: $3.64
EXIT 62 Dillon Dillon, Montana No gas stations detected here
EXIT 59 MT-278; Jackson; Wisdom Dillon, Montana No gas stations detected here
EXIT 56 Barretts Dillon, Montana 15th Best Exit Chevron Right (NW) - 0.1 miles 4056 Rebich Ln, Dillon, MT 59725 $3.799 >24h old 1 prices within 1 mile - Avg: $3.80
PARKING AREA Parking Area Dillon, Montana No gas stations detected here
EXIT 52 Frontage Road;Lower Grasshopper Road Dillon, Montana No gas stations detected here
EXIT 51 Dalys Dillon, Montana No gas stations detected here
EXIT 44 MT-324; Clark Canyon Reservoir Dillon, Montana No gas stations detected here
EXIT 37 Red Rock Road North Dillon, Montana No gas stations detected here
PARKING AREA Parking Area Dillon, Montana No gas stations detected here
EXIT 23 Dell Lima, Montana No gas stations detected here
WEIGH STATION Weigh Station Lima, Montana No gas stations detected here
EXIT 15 Lima Lima, Montana 17th Best Exit Exxon Left (NE) - 0.1 miles 114 S Harrison St, Lima, MT 59739 $3.899 1 prices within 1 mile - Avg: $3.90
STATE BORDER State Endpoint Spencer, Montana No gas stations detected here
STATE BORDER State Endpoint Spencer, Idaho No gas stations detected here
EXIT 190 Humphray Spencer, Idaho No gas stations detected here
EXIT 184 Stoddard Cr Area Spencer, Idaho No gas stations detected here
EXIT 180 Spencer Spencer, Idaho No gas stations detected here
EXIT 172 Exit Dubois, Idaho No gas stations detected here
EXIT 167 ID-22 W; Dubois Dubois, Idaho 20th Best Exit Sinclair Left (E) - 0.26 miles 630 Main St, Dubois, ID 83423 $4.099 1 prices within 1 mile - Avg: $4.10
EXIT 150 Hamer Hamer, Idaho No gas stations detected here
WEIGH STATION Weigh Station Hamer, Idaho No gas stations detected here
EXIT 143 ID-33; Mud Lake; Rexburg Roberts, Idaho No gas stations detected here
EXIT 135 ID-48; Roberts; Rigby Roberts, Idaho 15th Best Exit Teton Truck Stop Left (E) - 0.23 miles 2855 E 627th N, Roberts, ID 83444 $3.799 1 prices within 1 mile - Avg: $3.80
EXIT 128 Osgood Area Idaho Falls, Idaho 17th Best Exit The Osgood Store Left (E) - 0.11 miles 2244 W 145 N, Idaho Falls, ID 83402 $3.899 1 prices within 1 mile - Avg: $3.90
EXIT 118 I-15; US-20 W; Historic Downtown; Arco Idaho Falls, Idaho 14th Best Exit Walmart Left (SE) - 0.4 miles 500 S Utah Ave, Idaho Falls, ID 83402 $3.759 7 prices within 1 mile - Avg: $3.88

iExit says...

If possible, try to fill up in Montana. On average, regular prices in Montana are 34 cents cheaper than Idaho.

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