Cheap Flights to Northern Illinois

View ₩228,900 flight on Thu, Mar 5, 2026Opens in a new window

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How much is the cheapest flight to Northern Illinois?

Prices were available within the past 7 days and start at ₩228,900 for one-way flights and ₩311,800 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Mar 10 - Wed, Mar 11
PIT
Pittsburgh
ORD
Chicago
₩311,800 Roundtrip, found 22 hours ago
₩311,800
Roundtrip
found 22 hours ago
Select Delta flight, departing Tue, Mar 10 from Pittsburgh to Chicago, returning Wed, Mar 11, priced at ₩311,800 found 22 hours ago
American Airlines
Tue, Mar 10 - Sat, Mar 21
PIT
Pittsburgh
ORD
Chicago
₩325,500 Roundtrip, found 22 hours ago
₩325,500
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Tue, Mar 10 from Pittsburgh to Chicago, returning Sat, Mar 21, priced at ₩325,500 found 22 hours ago
United
Tue, Mar 10 - Thu, Mar 19
PIT
Pittsburgh
ORD
Chicago
₩371,000 Roundtrip, found 22 hours ago
₩371,000
Roundtrip
found 22 hours ago
Select United flight, departing Tue, Mar 10 from Pittsburgh to Chicago, returning Thu, Mar 19, priced at ₩371,000 found 22 hours ago
Air Canada
Thu, May 28 - Fri, Jun 5
ICN
Seoul
ORD
Chicago
₩973,900 Roundtrip, found 6 days ago
₩973,900
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, May 28 from Seoul to Chicago, returning Fri, Jun 5, priced at ₩973,900 found 6 days ago
Hawaiian Airlines
Thu, Feb 26 - Wed, Mar 4
ICN
Seoul
ORD
Chicago
₩1,344,600 Roundtrip, found 2 days ago
₩1,344,600
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Thu, Feb 26 from Seoul to Chicago, returning Wed, Mar 4, priced at ₩1,344,600 found 2 days ago

Searching for cheap flights to Northern Illinois? No travel company presents more choices than Expedia if you're looking to compare flights to Northern Illinois. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Illinois. Expedia provides the cheapest flights to many destinations in Illinois and you may find even greater savings if you combine your flight with a hotel stay in Northern Illinois.

Frequently asked questions

How do I find cheap flights to Northern Illinois that have flexible change policies?
Search for your cheap flights to Northern Illinois, then tick the "No change fee" box under the "Flexible change policies" heading. It's that simple. We know that things can change and flexibility is important, so book with confidence with Expedia.
Which airlines fly to Northern Illinois?
A good selection of airlines fly to destinations in or close to Northern Illinois. Your vacation is just a few clicks away with these popular carriers:

  • United Airlines - 13,058 flights to or near Northern Illinois each month, including 12,950 flights to O'Hare Intl. Airport (ORD) and 108 flights to Quad City Intl. Airport (MLI) per month.
  • American Airlines - 8,977 flights to or near Northern Illinois each month, including 8,855 flights to O'Hare Intl. Airport (ORD) and 121 flights to Quad City Intl. Airport (MLI) per month.
  • Delta Air Lines - 1,282 flights to or near Northern Illinois each month, including 1,222 flights to O'Hare Intl. Airport (ORD) and 60 flights to Quad City Intl. Airport (MLI) per month.

How can I find cheap tickets to Northern Illinois?
A good strategy for nabbing cheap fares is to be flexible with your dates. Begin with searching for your flight to Northern Illinois, then click on the "flexible dates" box to see prices for nearby days. Another good tip? Book well ahead. To give you an idea of fares, ₩311,800 was the best price for a flight to Northern Illinois in the last seven days.
How much is a flight to Northern Illinois?
One-way flights from Pittsburgh (PIT) sold for just ₩228,900 in the last seven days. During this time, the price of a return air ticket to Northern Illinois ranged between ₩311,800 and ₩1,344,600. If you find a bargain ticket, book as fast as you can — these prices don't stick around for long.
What are the most popular airports to fly into in Northern Illinois?
Cruise into one of these top Northern Illinois airports and you'll be in the perfect position to discover all that this terrific region has to offer:

  • O'Hare Intl. Airport (ORD) - 25,318 flights per month.
  • Quad City Intl. Airport (MLI) - 325 flights per month.
  • Williamson County Regional Airport (MWA) - 156 flights per month.

When is the cheapest time to fly to Northern Illinois?
Consider leaving earlier in the week to secure the best fare to Northern Illinois. Tuesday is normally the most affordable day to fly, followed by Monday. Saturday typically has the highest ticket prices. This is because a lot of travelers like to begin their vacation on a weekend.
How much is a plane ticket to Northern Illinois?
In the last seven days, tickets varied between ₩311,800 and ₩1,344,600. Take a look at our amazing deals to Northern Illinois, pick your favorite and then start packing!
What months are the cheapest to book a flight to Northern Illinois?
February is the cheapest month to book your Northern Illinois adventure. Fares are at a premium throughout the busy month of December, so avoid this time if possible.
Flights to Northern Illinois information
Destination airport
O'Hare Intl.
Destination airport IATA code
ORD
Destination city name
Chicago
Roundtrip price
₩196,200

Trending flights to Northern Illinois

Prices were available within the past 7 days and start at ₩228,900 for one-way flights and ₩311,800 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, May 28 - Fri, Jun 5
ICN
Seoul
ORD
Chicago
₩973,900 Roundtrip, found 6 days ago
₩973,900
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, May 28 from Seoul to Chicago, returning Fri, Jun 5, priced at ₩973,900 found 6 days ago
*Available to Expedia members.