A street with a bakery, motorcycles parked on the sidewalk, and a blue car.

Cheap Flights to Northern Illinois

View ₩140,200 flight on Fri, Oct 30, 2026Opens in a new window

Popular airlines

  • American Airlines

  • United

  • Delta

  • Allegiant Air

  • Alaska Airlines

  • Lufthansa

  • KLM

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 40% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

How much is the cheapest flight to Northern Illinois?

Prices were available within the past 7 days and start at ₩140,200 for one-way flights and ₩361,400 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
United
American Airlines
Philippine Airlines
WestJet

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, ₩361,400 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 Baltimore (BWI) sold for just ₩140,200 in the last seven days. During this time, the price of a return air ticket to Northern Illinois ranged between ₩361,400 and ₩1,420,500. 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 ₩361,400 and ₩1,420,500. 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.

Book with confidence

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.

Travel information

Destination airport
O'Hare Intl.
Destination airport IATA code
ORD
Destination city name
Chicago
Roundtrip price
₩280,500

Trending flights to Northern Illinois

Prices were available within the past 7 days and start at ₩140,200 for one-way flights and ₩361,400 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Philippine Airlines
*Available to Expedia members.