| Business | Phone |
| Advantage Rent-A-Car 4189 Santa Ana St # F, Ontario 91761 | (909) 390-3977 |
| Avis Rent A Car 3450 E Airport Dr # 500, Ontario 91761 | (909) 390-1441 |
| Budget Car & Truck Rental Ontario 91761 | (909) 937-6444 |
| Budget Rent A Car 1366 E Holt Blvd, Ontario 91761 | (909) 986-4477 |
| Budget Rent A Car Ontario International Airport, Ontario 91761 | (909) 983-9691 |
| Hertz Rent A Car 1375 S Woodruff Way, Ontario 91761 | (909) 937-3909 |
| Hertz Rent A Car 3450 E Airport Dr, Ontario 91761 | (909) 937-8877 |
| Hertz Rent A Car 4930 Vanderbilt St, Ontario 91761 | (909) 390-2990 |
| National Car Rental 3450 E Airport Dr # 300, Ontario 91761 | (909) 937-7555 |
| Enterprise Rent-A-Car 1344 E Holt Blvd, Ontario 91761 | (909) 460-0107 |
| Enterprise Rent-A-Car 1401 Auto Center Dr, Ontario 91761 | (909) 390-5345 |
| Enterprise Rent-A-Car 1823 E 4th St, Ontario 91764 | (909) 391-3292 |
| Enterprise Rent-A-Car 2131 E Convention Center Way, Ontario 91764 | (909) 605-7407 |
| Enterprise Rent-A-Car 491 Kettering Dr, Ontario 91761 | (909) 605-1905 |
| Rent 4 Less 1336 E Holt St, Ontario 91762 | (909) 635-2603 |
| Sunrise Rent A Car 1070 S Vineyard Ave, Ontario 91761 | (909) 937-2745 |
| Sunrise Rent-A-Car 2235 E 4th St # J, Ontario 91764 | (909) 484-0999 |
| Thrifty Car Rental 126 S Vineyard Ave, Ontario 91761 | (909) 988-8581 |
| Avis Rent A Car 1776 E Holt Blvd, Ontario 91761 | (909) 983-3689 |
| Rent 4 Less Ontario Airport, Ontario 91762 | (909) 635-2603 |