Enter your Illinois zip code, and a promo code if applicable, then click "get started." You'll see Constellation's available natural gas and electricity plans near you. Illinois residents can compare energy plans with no sign-up fees from Constellation.
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Constellation offers these Illinois natural gas & electricity solutions:
Switching Illinois Energy Suppliers
In Illinois, utility companies used to be the only option for energy users — the utility controlled delivery, pricing and maintenance. Today, you can choose the best Illinois energy supplier for you meaning it's easy to compare electricity, natural gas, and renewable electric plans near you and select the best rate and plan for your needs.
Understanding Energy Suppliers in Illinois vs. Utility Companies
Utilities companies deliver natural gas to your home. In Illinois, this means your utility — which many customers refer to as light and power companies — owns the power lines and gas pipelines which deliver energy to you to serve your home.
What is an energy supplier?
Energy suppliers let you pick and set the rate you pay for energy. The right to choose among Illinois energy suppliers gives you more control over your budget by expanding your home energy options. Energy suppliers in Illinois can also offer fixed-rate plans, so you know what energy rate you’ll be paying every month.
Constellation is an Illinois energy supplier, which means that we aren't the utility company that delivers natural gas to your home, but the one who sets your rate and contract term. As your energy supplier in Illinois, we provide you with customized electric plans, competitive Illinois natural gas rates, and exceptional customer service!
*Only new customer successful enrollments with Constellation. Cards are issued by Virtual Rewards Center. Valid email address required for receipt of gift card. Gift cards will not have cash access. For any questions about your gift card, call our customer care team at 1-855-465-1244. The listed merchants are in no way affiliated with Constellation nor are the listed merchants to be considered sponsors or co-sponsors of this program. Use of merchant names and/or logos is by the permission of each respective merchant and all trademarks are the property of their respective owners. Terms and conditions are applied to gift cards/certificates. Please see the merchant gift card/gift certificate for additional terms and conditions, which are subject to change at merchant's sole discretion. Constellation will share your name and email address with Virtual Reward Center for reward fulfillment only. Reward link expires in 3 months.
+You may terminate this Contract without incurring an early termination fee during the 90 days following your enrollment date (the Guarantee Period) by notifying us in writing or by calling our customer care center at 1-855-465-1244. Upon your termination during the Guarantee Period, we will return you to being supplied by the Utility at your next available meter read date and you will remain responsible for payment for electricity and related costs and charges incurred under this Contract through such meter read date.