Cheapest Day to Buy Gas for Better Savings

Gas prices have a way of making even a short drive feel expensive. When prices are up, most people start looking for easy ways to save, and one of the simplest is timing your fill-up a little better. The good news is that gas prices often follow a weekly pattern, which means the day you stop at the pump can make a difference.

According to GasBuddy’s 2026 analysis of daily statewide average gas prices over the past year, Sunday is the cheapest day to buy gas in most U.S. states. GasBuddy found that it was the best day in 41 states, while Monday came out on top in a handful of others. Midweek, especially Wednesday and Thursday, tends to be the most expensive time to fill up.

So, what is the cheapest day to buy gas?

For most drivers, Sunday is the safest bet. That is the clearest takeaway from the latest state-by-state data. If you are trying to pick one day each week to top off your tank, Sunday gives you the best odds of paying a little less.

That said, it is not Sunday everywhere. A few states break from the pattern. GasBuddy’s 2026 data shows Monday is the cheapest day in Alaska, Delaware, Indiana, and Ohio. Saturday is the best day in Kansas, Pennsylvania, South Dakota, and Wyoming. Montana is the main outlier where Tuesday is cheapest.

Why gas is often cheaper on Sundays

Gas prices do not only move because of oil markets or headlines. They also tend to follow a weekly rhythm. GasBuddy says it analyzed daily statewide averages over the past year and normalized them week by week to spot consistent weekday pricing patterns, separate from seasonal swings. In plain English, that means some days repeatedly trend cheaper than others.

Part of that comes down to local competition, station pricing behavior, and regional price cycling. In some markets, prices jump sharply on certain days and then ease again later in the week. That is why timing matters more in some states than others. GasBuddy’s petroleum analysis team says drivers in states with price cycling can find bigger savings just by choosing the right day to buy.

The most expensive days to buy gas

If Sunday is usually the smart play, Wednesday and Thursday are the days to watch out for. In GasBuddy’s 2026 state list, Wednesday is the worst day in many states, while Thursday is the most expensive in quite a few others, especially in the Northeast and parts of the West.

A few examples make the pattern easy to see. California, Colorado, Idaho, and Utah all show Tuesday as the worst day. New York, Connecticut, Michigan, Virginia, Washington, and Wisconsin list Thursday as the most expensive day. Meanwhile, states like Texas, Florida, Illinois, and Tennessee show Wednesday as the priciest day to fill up.

Cheapest day to buy gas by state

You do not need to memorize a giant chart to use this well. Here is the simple version:

Sunday is cheapest in most states

This includes big states like California, Florida, Texas, New York, Michigan, Georgia, North Carolina, Virginia, and Washington. If you want one easy rule that works in most places, Sunday is the one.

Monday is best in a few states

Drivers in Alaska, Delaware, Indiana, and Ohio may want to wait until Monday instead.

Saturday wins in a small group

Kansas, Pennsylvania, South Dakota, and Wyoming are the states where Saturday is cheapest.

One state prefers Tuesday

Montana is the notable Tuesday state in the 2026 report.

Does timing still matter when gas prices are high?

Yes, even when prices are rising overall, the weekly pattern still matters. Recent reporting on 2026 gas prices shows national averages have climbed sharply, but state-by-state price differences remain large, and consumers are feeling every extra dollar at the pump. When prices are elevated, even a small per-gallon difference becomes more noticeable over time.

That does not mean timing will save you a fortune on every fill-up. It usually means shaving off a few cents per gallon, not cutting your fuel bill in half. Still, over weeks and months, combining the cheapest day with a good local station or a gas price app can help you keep a bit more money in your pocket.