Sunday Is the Best Day to Buy Gas
Sunday is the cheapest day to buy gas in most U.S. states, and Monday is usually the second cheapest, according to GasBuddy’s 2026 nationwide analysis. Prices tend to climb through the workweek, making Wednesday through Friday the most expensive window in many markets. Simply shifting your fill up by a day or two can save 4 to 9 cents per gallon with no other change to your routine.
Why Gas Prices Follow a Weekly Rhythm
Gas prices move with global oil markets, but they also follow a predictable weekly cycle. Stations often raise prices as weekday commuting demand builds, then ease prices as the weekend approaches and competition resets. GasBuddy analyzed a full year of daily statewide prices and found this pattern held across most of the country. Patrick De Haan, GasBuddy’s head of petroleum analysis, puts it plainly: gas prices do not just move on oil markets, they follow a weekly rhythm, and for most drivers Sunday is the safest bet for lower prices.
How Much You Can Save by Timing Your Fill Up
In most states, the gap between the cheapest and most expensive day averages 4 to 9 cents per gallon. On a 15 gallon fill up done weekly, that is roughly $30 to $65 a year for changing nothing except your schedule. In states with weekly price cycles, the savings can be far bigger. Avoiding a fill up right after a price spike can save 15 to 45 cents per gallon in states like Texas, Florida, Michigan, Indiana, and Ohio, where prices jump sharply one day and then slide down over several days.
Watch Out for Price Cycling in Your State
Price cycling is the biggest exception to the smooth weekly pattern. In cycling markets, stations reset prices to a high level on one day, then competitors undercut each other until the next reset. If you fill up the day of the spike, you can pay 15 to 45 cents more per gallon than someone filling up two days later at the same station. The fix is simple. If prices at your usual station suddenly jump, wait a few days if your tank allows. Use a price tracking app to spot the spike before you pull in.
What About Holiday Weekends?
The weekly rhythm has a seasonal cousin. Prices often creep up ahead of major holiday weekends like Memorial Day, July 4th, and Labor Day, when refineries are making the costlier summer blend and demand surges. If a holiday road trip is coming, filling up the week before rather than the day you leave can save you from the pre holiday bump. The same logic applies in reverse: after the holiday, prices usually settle back down.
Time of day, on the other hand, is mostly a myth. Some drivers swear by morning fill ups, theorizing that cooler fuel is denser, but underground storage tanks keep fuel at a stable temperature all day, so the time you pump makes no meaningful difference to what you pay. Day of the week and station choice are the levers that actually move the needle.
Pair Timing With Smarter Station Choice
Day of the week matters, but where you buy matters more. Use a gas price app to compare stations before you leave, and consider cheap gas strategies like warehouse club stations, which run about 34 cents per gallon below the national average according to OPIS data. Combine Sunday timing with the cheapest station and you are saving on both the day and the place. Our cheap gas guide has more ways to cut your per gallon cost.
Is Monday a good day to buy gas?
Yes. Monday is typically the second cheapest day of the week in GasBuddy’s data. If you cannot fill up on Sunday, Monday morning is your next best bet.
What is the worst day to buy gas?
Wednesday through Friday tend to be the most expensive days in many parts of the country. In states like Oklahoma, Wednesday is consistently the priciest day.
Does the best day to buy gas differ by state?
The general pattern holds nationally, but the details vary. Sunday is the cheapest day in most states, including Texas and Oklahoma, while price cycling in states like Florida and Michigan makes post spike timing matter even more.
Is it worth driving farther on a cheaper day?
Usually not for timing alone. Four to nine cents per gallon saves about $1 on a typical fill up, so a long detour wipes out the gain. The real win is shifting the day of a fill up you were making anyway. For station choice, see our gas station guide and diesel station finder.
Facts verified October 2026. Prices, taxes, and app terms change over time and vary by state.