What is the average price for a flight to Illinois with United Airlines?

The typical United Airlines fare to Illinois averages $453 for a return flight and around $247 for a one-way ticket.

Does United Airlines usually have the lowest fares for flights to Illinois?

Allegiant Air frequently offers the lowest average return price for flights to Illinois, but fares can vary between airlines and dates. We recommend comparing all available options on KAYAK before booking your flight.

What other airlines fly to Illinois besides United Airlines?

In addition to United Airlines, airlines such as Southwest, Frontier and Alaska Airlines also operate flights to Illinois. Check KAYAK to compare fares from these and other carriers.

United Airlines flights to Illinois (USIL) from $59

Flight Deals

Cheap United Airlines Flight Deals to Illinois

Here are some of the best deals found on KAYAK recently from United Airlines to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip United Airlines flight deals from the United States to Illinois

Sat, Jan 17 - Sat, Jan 17

7:00 am - 9:29 amDFW-ORD

2h 29mnonstop

12:45 pm - 3:28 pmORD-DFW

2h 43mnonstop

$112United Airlines

Find Deal

Tue, Dec 9 - Tue, Dec 16

9:40 am - 11:40 amBOS-ORD

3h 00mnonstop

1:55 pm - 5:15 pmORD-BOS

2h 20mnonstop

$117United Airlines

Find Deal

Fri, Jan 9 - Sun, Jan 11

10:25 am - 12:55 pmDFW-ORD

2h 30mnonstop

7:15 am - 10:03 amORD-DFW

2h 48mnonstop

$117United Airlines

Find Deal

Sun, Dec 7 - Tue, Dec 9

10:40 am - 12:40 pmBOS-ORD

3h 00mnonstop

4:05 pm - 7:25 pmORD-BOS

2h 20mnonstop

$122United Airlines

Find Deal

Fri, Dec 5 - Fri, Dec 5

6:00 am - 8:00 amBOS-ORD

3h 00mnonstop

1:55 pm - 5:15 pmORD-BOS

2h 20mnonstop

$127United Airlines

Find Deal

Mon, Dec 15 - Mon, Dec 22

12:50 pm - 2:50 pmBOS-ORD

3h 00mnonstop

9:12 pm - 12:45 amORD-BOS

2h 33mnonstop

$129United Airlines

Find Deal

Sat, Dec 13 - Sat, Dec 20

6:23 pm - 8:23 pmBOS-ORD

3h 00mnonstop

9:12 pm - 12:45 amORD-BOS

2h 33mnonstop

$132United Airlines

Find Deal

Sat, Dec 13 - Mon, Dec 15

2:25 pm - 4:04 pmEWR-ORD

2h 39mnonstop

7:10 am - 10:20 amORD-EWR

2h 10mnonstop

$137United Airlines

Find Deal

Mon, Dec 8 - Tue, Dec 9

7:15 am - 8:57 amLGA-ORD

2h 42mnonstop

3:00 pm - 6:07 pmORD-LGA

2h 07mnonstop

$137United Airlines

Find Deal

Wed, Jan 21 - Thu, Jan 22

4:16 pm - 6:16 pmBOS-ORD

3h 00mnonstop

7:30 am - 10:52 amORD-BOS

2h 22mnonstop

$137United Airlines

Find Deal

Useful Info

Low season	January
High season	December
Cheapest flight	$59
Average price round-trip	$542
Good deal round-trip	$461
Good deal one-way	$735

Best time to beat the crowds with an average 4% drop in price.

Most popular time to fly with an average 2% increase in price.

Flight from Dallas/Fort Worth Airport to Chicago O'Hare Airport

(avg. price over the last 2 weeks)

or less

KAYAK's insights & trends for flights to Illinois

Get data-powered insights and trends for flights to Illinois to help you find the cheapest flights, the best time to fly and much more.

Prices

The cheapest ticket to Illinois from the United States found in the last 72 hours was to Chicago O'Hare Intl Airport, at $287 round-trip. The most popular route is San Francisco (SFO) to Chicago O'Hare Intl Airport (ORD) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $287.

What is the cheapest day to fly to Illinois?

Based on KAYAK data, the cheapest day to fly to Illinois is Friday where round-trip tickets can be as cheap as $381. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $602 on average.

What is the cheapest month to fly from the United States to Illinois?

The cheapest month for flights from the United States to Illinois is April, when tickets cost $347 (return) on average. On the other hand, the most expensive months are November and December, when the average cost of round-trip tickets is $528 and $477 respectively.

How far in advance should I book a flight from the United States to Illinois?

To get a below average price on the flight from the United States to Illinois, you should book around 4 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Find deals

What is the average price for a flight to Illinois with United Airlines?
The typical United Airlines fare to Illinois averages $453 for a return flight and around $247 for a one-way ticket.
Does United Airlines usually have the lowest fares for flights to Illinois?
Allegiant Air frequently offers the lowest average return price for flights to Illinois, but fares can vary between airlines and dates. We recommend comparing all available options on KAYAK before booking your flight.
What other airlines fly to Illinois besides United Airlines?
In addition to United Airlines, airlines such as Southwest, Frontier and Alaska Airlines also operate flights to Illinois. Check KAYAK to compare fares from these and other carriers.

7.4

Good9,015 verified ratings

7.7Boarding

7.3Comfort

8.1Crew

6.6Food

7.1Entertainment

Pros +

Flight was quick and easy. (in 2447 reviews)

Cons -

Have the middle seats vacant. (in 137 reviews)
The space in economy plus. (in 296 reviews)

Show reviews that mention

10.0 Wonderful

Mike, Nov 2025

I dread trans-Pacific flights. They are very long. This was my first time on Universal, and it was my best crossing ever. The staff were professional, the hospitality was great, and the food was delicious. The entertainment system filled the long flight hours. I will seek out Universal flights from now onwards. 🙂

8.0 Very good

Anonymous, Nov 2025

on time and entertainment on board

10.0 Wonderful

Paul, Nov 2025

United has come a long way, it’s been a fantastic experience traveling with them.

10.0 Wonderful

Anonymous, Nov 2025

The whole experience was excellent

10.0 Wonderful

Anonymous, Nov 2025

The whole experience was excellent

8.0 Very good

David, Nov 2025

Even though we were delayed, we were able to make our connection

10.0 Wonderful

Claire, Nov 2025

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

10.0 Wonderful

David, Nov 2025

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

10.0 Wonderful

Gheorghe, Nov 2025

Is my favorite Lufthansa?

8.0 Very good

Semra, Nov 2025

Good trip. Good crew. Thank you!

Everything you need to know for your flight to Illinois

Airlines

Cabin class

Complete your trip

Flights to other cities

Origins

Popular routes

Return flight deals

United Airlines flights

Airlines flying to Illinois

Frontier flights to Illinois

Spirit Airlines flights to Illinois

American Airlines flights to Illinois

Delta flights to Illinois

Find cheap United Airlines flights to Illinois from $59

Search hundreds of travel sites at once for deals on United Airlines flights to Illinois

Cheap United Airlines Flight Deals to Illinois

Recent round-trip United Airlines flight deals from the United States to Illinois

Recent one-way United Airlines flight deals from the United States to Illinois

Recent last minute United Airlines flight deals from the United States to Illinois

Recent direct United Airlines flight deals from the United States to Illinois

Good to know

KAYAK's insights & trends for flights to Illinois

Get data-powered insights and trends for flights to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Illinois?

What is the cheapest day to fly to Illinois?

Based on KAYAK data, the cheapest day to fly to Illinois is Friday where round-trip tickets can be as cheap as $381. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $602 on average.

What is the cheapest month to fly from the United States to Illinois?

The cheapest month for flights from the United States to Illinois is April, when tickets cost $347 (return) on average. On the other hand, the most expensive months are November and December, when the average cost of round-trip tickets is $528 and $477 respectively.

How far in advance should I book a flight from the United States to Illinois?

To get a below average price on the flight from the United States to Illinois, you should book around 4 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

How many airports are there in Illinois?

There are 4 airports in Illinois. The busiest airport is Chicago O'Hare Airport (ORD), with 98% of all flights arriving there.

How long is the flight to Illinois?

An average nonstop flight from the United States to Illinois takes 2h 46m, covering a distance of 965 miles. The shortest route is Minneapolis (MSP) to Chicago O'Hare Intl Airport (ORD) with an average flight time of 1h 24m.

How many direct flights to Illinois are there each day?

There are around 606 direct flights from within United States to Illinois every day. Most flights (52%) depart in the morning.

How many direct flights to Illinois are there each week?

Each week there are around 4,237 direct flights from within United States to Illinois. The most common day for departures is Sunday, with 16% of flights taking off on this day.

How many long-haul flights are there to Illinois each week?

Each week there are around 8 long-haul flights (6-12 hour flight duration), 311 medium-haul (3-6 hour flight duration) and 3,918 short-haul (up to 3 hour flight duration) flights to Illinois. The most long-haul flights depart from Honolulu.

How many cities have direct flights to Illinois?

From the United States, there are direct flights to Illinois from 129 cities. The city with the most direct flights is New York, with 228 direct flights each week.

What are the most popular destinations in Illinois?

Based on KAYAK flight searches, the most popular destination is Chicago (93% of total searches to Illinois). The next most popular destination is St. Louis (7%).

FAQs for flying to Illinois with United Airlines

What is the average price for a flight to Illinois with United Airlines?

Does United Airlines usually have the lowest fares for flights to Illinois?

What other airlines fly to Illinois besides United Airlines?

United Airlines customer reviews

Pros +

Cons -

Traveler rating:

Sort by:

Everything you need to know for your flight to Illinois

Airlines flying to Illinois

Cabin class types available on flights to Illinois

Complete your trip to Illinois with a hotel stay or car rental

Flights to other popular destinations

Flights from domestic origins to Illinois

Flights to popular cities in Illinois

Find deals for your return flight

Top United Airlines flights