Costco Gas Prices in Ontario, California
Ontario Business Center · Warehouse #947
3680 E GUASTI RD, Ontario, California 91761-3708
Prices updated: July 22, 2026 at 9:00 PM
Regular
$-.---
PRICE PER GALLON
Press
Premium
$5.499
PRICE PER GALLON
Press
Current gas prices at Costco #947
This Costco gas station is located at 3680 E GUASTI RD in Ontario, California. The latest reported fuel prices are premium at $5.499/gal. Prices were last updated on July 22, 2026 at 9:00 PM.
Get directions to this Costco gas station30-Day Price History
30-day change
Premium
$5.499+0.400 (7.8%)
DateRegPrem
Jul 22, 9:00 PM—$5.499
Jul 22, 8:00 PM$5.099$5.499
Jul 21, 10:00 PM$5.029$5.499
Jul 21, 4:00 PM$4.999$5.399
Jul 20, 5:00 PM$4.959$5.359
Jul 18, 4:00 PM$4.899$5.299
Jul 17, 10:00 PM$4.859$5.199
Jul 16, 12:00 AM$4.799$5.159
Jul 15, 3:00 PM$4.759$5.159
Jul 13, 6:00 PM$4.699$5.099
Jul 10, 5:00 PM$4.599$4.999
Jul 9, 2:00 PM$4.739$5.099
Jul 9, 6:00 AM—$5.099
Jul 9, 5:00 AM$4.739$5.099
Jul 8, 9:00 PM$4.699$4.999
Jul 8, 4:00 PM$4.599$4.999
Jul 6, 4:00 PM$4.499$4.899
Jul 5, 6:00 PM$4.599$4.999
Jul 4, 8:00 PM$4.539$4.959
Jul 4, 2:00 AM—$4.959
Jul 4, 1:00 AM$4.539$4.959
Jul 3, 4:00 PM$4.499$4.929
Jul 2, 5:00 PM$4.539$4.959
Jun 30, 5:00 PM$4.559$4.999
Jun 29, 10:00 PM$4.699$4.999
Jun 28, 7:00 PM—$4.999
Jun 28, 6:00 PM$4.699$4.999
Jun 28, 4:00 PM$4.699$5.099