Cheapest Gas in Chicago, IL
Updated April 5, 2026 — Prices updated regularly from EIA data
$3.16
Lowest price at Costco in Chicago
Finding Cheap Gas in Chicago
The cheapest gas in Chicago right now comes from warehouse clubs and high-volume discount stations. With prices as low as $$3.16 versus a metro average of $$3.31, smart shoppers find real savings consistently.
Maximum Savings in Chicago
Choose Costco over Chevron
$0.25 per gallon
$3.75 per 15-gallon fill • $12.00 per year (est.)
Cheapest Brands in Chicago
| Rank | Brand | Est. Price | Savings vs. Most Expensive |
|---|---|---|---|
| #1 | Costco | $3.16 | $0.25 |
| #2 | Speedway | $3.28 | $0.13 |
| #3 | Circle K | $3.29 | $0.12 |
| #4 | Sunoco | $3.32 | $0.09 |
| #5 | Marathon | $3.33 | $0.08 |
| #6 | BP | $3.35 | $0.06 |
| #7 | Mobil | $3.36 | $0.05 |
| #8 | Exxon | $3.37 | $0.04 |
| #9 | Shell | $3.39 | $0.02 |
| #10 | Chevron | $3.41 | $0.00 |
Gas Saving Tips for Chicago Drivers
- Avoid filling up at highway exits, airports, and tourist areas where convenience premiums routinely add 15-25 cents per gallon.
- Keep your tires properly inflated to the manufacturer's recommended PSI — under-inflated tires reduce fuel economy by up to 3%, costing you money every mile.
- Accelerate and brake gradually. Aggressive driving can reduce fuel economy by 15-40%, directly increasing how often you fill up.
- Track weekly price cycles in your city — most markets follow predictable weekly patterns. Identifying yours and filling on low-price days saves 5-15 cents per gallon consistently.
- Fill up before holiday weekends. Memorial Day, Fourth of July, and Labor Day consistently see 10-25 cent price spikes as demand surges. Topping off Thursday before a holiday weekend beats the rush.
Nearby Cities with Cheaper Gas
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