Distance between cities › USA › California › Keyes, CA › Distance from Keyes to O Fallon Book Hotels

Distance from Keyes, CA to O Fallon, IL

Distance

2,069 mi

Time

1 day 11 hours

Gas Cost

$193 - $375

There are 1,679.84 miles from Keyes to O Fallon in east direction and 2,069 miles (3,329.73 kilometers) by car, following the I-80 route.

Keyes and O Fallon are 1 day 11 hours far apart, if you drive non-stop .

This is the fastest route from Keyes, CA to O Fallon, IL.

Please note the time difference between Keyes, CA and O Fallon, IL is 2 hours. The current time in Keyes is 4:36 am and the current time in O Fallon is 6:36 am.

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Keyes, CA to O Fallon, IL:

Lowest Price Rental Cars in Keyes, CA

Planning on renting a car to go from Keyes, CA to O Fallon, IL? Here there are some offers to rent a car in Keyes, CA

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Keyes »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 83.11 gallons of gas to cover the route between Keyes, CA and O Fallon, IL.

The estimated cost of gas to go from Keyes to O Fallon is $271.10.

During the route, an average car will release 1,628.28 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Keyes, CA and O Fallon, IL

If you want to meet halfway between Keyes, CA and O Fallon, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 41.739093 and -106.62492, or 41º 44' 20.7348" N, 106º 37' 29.712" W. This location is 1,034.71 miles away from Keyes, CA and O Fallon, IL and it would take approximately 17 hours 56 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Hanna, WY, situated 1,058 miles from Keyes, CA and 1,022 miles from O Fallon, IL. It would take 18 hours 6 mins to go from Keyes to Hanna and 18 hours 16 mins to go from O Fallon to Hanna.