Does Spirit 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 Spirit Airlines?

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

Spirit Airlines flights to Illinois (USIL) from $45

Flight Deals

Cheap Spirit Airlines Flight Deals to Illinois

Here are some of the best deals found on KAYAK recently from Spirit 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 Spirit Airlines flight deals from the United States to Illinois

Thu, Dec 4 - Sat, Dec 6

8:41 pm - 10:11 pmLGA-ORD

2h 30mnonstop

4:38 pm - 7:42 pmORD-LGA

2h 04mnonstop

$87Spirit Airlines

Find Deal

Tue, Dec 9 - Tue, Dec 16

5:28 am - 6:36 pmDFW-ORD

13h 08m1 stop

7:20 am - 9:58 amORD-DFW

2h 38mnonstop

$88Spirit Airlines

Find Deal

Fri, Dec 5 - Mon, Dec 8

8:41 pm - 10:11 pmLGA-ORD

2h 30mnonstop

4:38 pm - 7:42 pmORD-LGA

2h 04mnonstop

$93Spirit Airlines

Find Deal

Mon, Dec 15 - Tue, Dec 16

8:41 pm - 10:11 pmLGA-ORD

2h 30mnonstop

4:38 pm - 7:42 pmORD-LGA

2h 04mnonstop

$94Spirit Airlines

Find Deal

Sat, Dec 6 - Sat, Dec 13

1:22 pm - 3:47 pmDFW-ORD

2h 25mnonstop

4:49 pm - 7:29 pmORD-DFW

2h 40mnonstop

$94Spirit Airlines

Find Deal

Thu, Dec 4 - Mon, Dec 8

8:41 pm - 10:11 pmLGA-ORD

2h 30mnonstop

4:38 pm - 7:42 pmORD-LGA

2h 04mnonstop

$95Spirit Airlines

Find Deal

Sat, Dec 6 - Mon, Dec 8

1:22 pm - 3:47 pmDFW-ORD

2h 25mnonstop

4:49 pm - 7:29 pmORD-DFW

2h 40mnonstop

$95Spirit Airlines

Find Deal

Sat, Dec 6 - Mon, Dec 15

7:42 pm - 6:05 amDFW-ORD

10h 23m1 stop

4:49 pm - 7:29 pmORD-DFW

2h 40mnonstop

$96Spirit Airlines

Find Deal

Sat, Dec 6 - Mon, Dec 8

7:42 pm - 6:05 amDFW-ORD

10h 23m1 stop

4:49 pm - 7:29 pmORD-DFW

2h 40mnonstop

$97Spirit Airlines

Find Deal

Fri, Dec 5 - Tue, Dec 9

8:41 pm - 10:11 pmLGA-ORD

2h 30mnonstop

4:38 pm - 7:42 pmORD-LGA

2h 04mnonstop

$98Spirit Airlines

Find Deal

Useful Info

Low season	October
High season	December
Cheapest flight	$45
Average price round-trip	$1,693
Good deal round-trip	$1,439

Best time to beat the crowds with an average 17% drop in price.

Most popular time to fly with an average 17% 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

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 February, when tickets cost $91 (return) on average. On the other hand, the most expensive months are November and October, when the average cost of round-trip tickets is $189 and $177 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

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

6.3

Okay8,146 verified ratings

6.6Boarding

5.0Entertainment

5.9Comfort

7.0Crew

5.1Food

Pros +

Cons -

Better customer service (in 666 reviews)

Show reviews that mention

2.0 Poor

Anonymous, Nov 2025

Endless, trip oof my life, we still are in in plane waiting for getting off.after 3 hours delay. Not even a glass of water.

4.0 Mediocre

Anonymous, Nov 2025

The checkin in laguardia was a disaster, scrambling left and right, it was constantly a trying to sell you something, better seat, constantly selling

10.0 Wonderful

marina, Nov 2025

Great

2.0 Poor

Anonymous, Nov 2025

Delayed 4 hours

6.0 Okay

Paula, Nov 2025

It was cheap. Spirit is what it is. I got to my destination and home safely. There was no food or entertainment without paying extra, which is fine. That’s why the flight was inexpensive.

10.0 Wonderful

Anonymous, Nov 2025

Like: seats that don't move; fast boarding; engaging crew; low-prices; individual gate at LGA; access to restrooms at the gate Dislike: no water on the flight

6.0 Okay

Angelique, Nov 2025

No wi-fi available for most of the flight

10.0 Wonderful

Wayne, Nov 2025

The flight was great. Everything was delivered well.

10.0 Wonderful

Viviany, Nov 2025

I like to flight with spirit

2.0 Poor

Jim, Nov 2025

No leg room. My knee was sore for a day.

Everything you need to know for your flight to Illinois

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Find cheap Spirit Airlines flights to Illinois from $45

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

Cheap Spirit Airlines Flight Deals to Illinois

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

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

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

Recent direct Spirit 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 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 February, when tickets cost $91 (return) on average. On the other hand, the most expensive months are November and October, when the average cost of round-trip tickets is $189 and $177 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 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 23 direct flights from within United States to Illinois every day. Most flights (51%) depart in the morning.

How many direct flights to Illinois are there each week?

Each week there are around 157 direct flights from within United States to Illinois. The most common day for departures is Monday, with 18% of flights taking off on this day.

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

Each week, there are 14 medium-haul flights (3-6 hour flight duration) and 143 short-haul flights (up to 3 hour flight duration) to Illinois. There aren't any long-haul flights (6-12 hour flight duration).

How many cities have direct flights to Illinois?

From the United States, there are direct flights to Illinois from 11 cities. The city with the most direct flights is New York, with 35 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 Spirit Airlines

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

What other airlines fly to Illinois besides Spirit Airlines?

Spirit Airlines customer reviews

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Everything you need to know for your flight to Illinois

Airlines flying to Illinois

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

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Find deals for your return flight

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