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Cheap Flights to Illinois - Explore Airfares, Routes & Airlines

With many flights to Illinois, travelers have plenty of choices to plan their trip with more convenience and flexibility. Flights operate throughout the week across leading airlines, with a mix of nonstop and connecting options available. Browse one-way fares from $60.99, round-trip fares from $197.62, and other affordable options to suit different budgets and travel needs. Review airline schedules, explore route options and choose suitable flights to Illinois based on your travel plans and preferences.

Find Cheap Flight Deals to Illinois from $60.99

Discover cheap flights to Illinois with updated one-way and round-trip airfare deals across popular routes. Compare fares, choose from multiple airlines, and book flights to top cities in Illinois at competitive prices.Call us for phone only deals at 
One Way Round Trip
BWI Baltimore Wed, Oct 21
CHI Chicago
from $60.99
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SJU San Juan Fri, Aug 28
CHI Chicago
from $87.98
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BOS Boston Sat, Jul 18
CHI Chicago
from $88.23
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NYC New York City Sat, Jul 18
CHI Chicago
from $107.23
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PHX Phoenix Mon, Oct 19
CHI Chicago
from $108.98
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LAX Los Angeles Tue, Jul 28
CHI Chicago
from $119.98
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BNA Nashville Wed, Aug 26
CHI Chicago
from $121.98
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SFO San Francisco Tue, Aug 4
CHI Chicago
from $138.99
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SJC San Jose Thu, Aug 27
CHI Chicago
from $138.99
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SAN San Diego Thu, Jul 23
CHI Chicago
from $140.99
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PDX Portland Thu, Aug 27
CHI Chicago
from $142.99
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SEA Seattle Tue, Jul 28
CHI Chicago
from $150.99
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BUR Burbank Tue, Jul 28
CHI Chicago
from $151.99
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HNL Honolulu Mon, Sep 14
CHI Chicago
from $308.62
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*All fares above were last found on:
Fares are one way/round trip. Fares incl. all fuel surcharges, taxes & fees and our service fees. Displayed fares are subject to change and cannot be guaranteed at the time of booking. See all booking terms and conditions. 202606~Ref:1JB6jfTjO0KO88nv1blkag

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Better deals are one call away Call us Say and save Expires Jun 30, 2026. Where applicable discount applies to service fees for qualified airline tickets. Amount of service fee discount varies: maximum savings of $10 per person applied to bookings from one (1) traveler up to five (5) travelers; the maximum discount applied is $50. Promo Code and Instant Savings offers can be combined up to the amount of our service fees but cannot be used or combined with any other coupons, promotions or special offers. May be withdrawn at any time without notice. Promo code only applicable for bookings created over the phone through our call center.