Check by Zip Code
MSN's Web site tabulates prices from 20,000 gas stations in major cities nationwide. Its information is usually a day behind.

Trip cost calculator
This handy calculator from AAA helps you figure out your fuel costs between major cities, even taking into account the vehicle you drive.

Virginia gas prices
Government database of gas prices around the Commonwealth of Virginia.
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North Carolina gas prices
A database of gas prices around Tarheel State.
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Average gas prices by state
This service from AAA displays the results of a daily survey of 60,000 self-serve stations across the country.

Gas Price Watch
Another price comparison tool with a route planner and other features.